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# Members

QuantOM is open to every researchers working in the field of quantitative methods for management, logistics and operations management.
See the core members page for more details.

# Scientific Production

A subset of recent works published by QuantOM members is available through the institutional depository ORBi:
 Starting date: 20182017201620152014 No limit Abstracts: None First lines Full

Papers - Books - Working Papers - Conferences

## Papers in Journals

MIP-based constructive heuristics for the three-dimensional Bin Packing Problem with transportation constraints
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in International Journal of Production Research (in press)

A road map for explorative scenario creation on Belgian rail freight transport development
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in Competition and Regulation in Network Industries (in press)

The starting point of this article is the weak usage of rail freight in Belgium and Europe, both as a sustainable mode of land transportation in itself as well as a part of the intermodal chain. The r...

Testing a Mixture Model of Single-Peaked Preferences

in Mathematical Social Sciences (in press)

Single-Peaked preferences play an important role in the social choice literature. In this paper, we look at necessary and sufficient conditions for aggregated choices to be consistent with a mixture m...

Comparison Between Robust and Stochastic Optimisation for Long-term Reservoir Operations Under Uncertainty
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in Water Resources Management (in press)

Long-term reservoir management often uses bounds on the reservoir level, between which the operator can work. However, these bounds are not always kept up-to-date with the latest knowledge about the r...

A Markov-switching Generalized additive model for compound Poisson processes, with applications to operational losses models
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in Quantitative Finance (in press)

This paper is concerned with modeling the behavior of random sums over time. Such models are particularly useful to describe the dynamics of operational losses, and to correctly estimate tail-related ...

A tailored two-phase constructive heuristic for the three-dimensional Multiple Bin Size Bin Packing Problem with transportation constraints
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in European Journal of Operational Research (2018), 267(1), 52-64

This paper considers the three-dimensional Multiple Bin Size Bin Packing Problem which consists in packing a set of cuboid boxes into containers of various shapes with minimising unused space. The pro...

Stochastic Inventory Routing for Perishable Products
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in Transportation Science (2018)

Different solution methods are developed to solve an inventory routing problem for a perishable product with stochastic demands. The solution methods are compared empirically in terms of average profi...

Special issue: Twelfth Workshop on Models and Algorithms for Planning and Scheduling Problems (MAPSP 2015)
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in Journal of Scheduling (2017), 20(6), 543-711

This special issue of the Journal of Scheduling contains ten papers presented at the Twelfth Workshop on Models and Algorithms for Planning and Scheduling Problems (MAPSP 2015), held from June 8 to Ju...

Design and Management of Freight Transport Networks: Intermodal Transport and Externalities

in 4OR : Quarterly Journal of the Belgian, French and Italian Operations Research Societies (2017)

Ph.D. thesis summary. Please refer to http://orbi.ulg.ac.be/handle/2268/211640 for the complete thesis....

Algorithmic Pricing Agents and Tacit Collusion: A Technological Perspective
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in IO: Regulation, Antitrust & Privatization SSRN (2017)

Development, dissemination, and applications of a new terminological resource the Q-Code taxonomy for professional aspects of General Practice / Family Medicine.
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in European Journal of General Practice (2017), accepted

Abstract of Background Paper: Background: While documentation of clinical aspects of General Practice/Family Medicine (GP/FM) is assured by the International Classification of Primary Care (ICPC), the...

Analysis of definitions of General Practice/Family Medicine and Primary Health Care
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in British Journal of General Practice (2017), 0050

Abstract Background There are numerous definitions of General Practice and Family Medicine (GP/FM) and Primary Health Care (PHC), but the distinction between the two concepts is unclear. Aim To conduc...

Early Detection of University Students with Potential Difficulties
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in Decision Support Systems (2017), 101

Using data mining methods, this paper presents a new means of identifying freshmen's profiles likely to face major difficulties to complete their first academic year. Academic failure is a relevant is...

Accounting for Price Endogeneity in Airline Itinerary Choice Models: An Application to Continental U.S. Markets
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in Transportation Research. Part A : Policy & Practice (2017), 100

Network planning models, which forecast the profitability of airline schedules, support many critical decisions, including equipment purchase decisions. Network planning models include an itinerary ch...

A Machine Learning-Based Approximation of Strong Branching
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in INFORMS Journal on Computing (2017), 29(1), 185-195

We present in this paper a new generic approach to variable branching in branch-and-bound for mixed- integer linear problems. Our approach consists in imitating the decisions taken by a good branching...

A class of valid inequalities for multilinear 0-1 optimization problems
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in Discrete Optimization (2017), 25

This paper investigates the polytope associated with the classical standard linearization technique for the unconstrained optimization of multilinear polynomials in 0-1 variables. A new class of valid...

A robust statistical approach to select adequate error distributions for financial returns
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in Journal of Applied Statistics (2017), 44(1), 137-161

In this article, we propose a robust statistical approach to select an appropriate error distribution, in a classical multiplicative heteroscedastic model. In a first step, unlike to the traditional a...

Road and intermodal transport performance: the impact of operational costs and air pollution external costs
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in Research in Transportation Business & Management (2017), 23

The transportation of goods is essential for the economy, but it also contributes to air pollution which, in turn, affects human health. These negative impacts generate additional costs for society th...

Intermodal network design: a three-mode bi-objective model applied to the case of Belgium
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in Flexible Services and Manufacturing Journal (2017)

Freight transport planning is nowadays encouraged to align with environmental objectives. Among those, climate change is of particular interest for many countries. In its White Paper on Transport, the...

The np Chart with Guaranteed In-control Average Run Lengths
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in Quality and Reliability Engineering International (2017), 33(5), 1057--1066

Statistically Bundled Shewhart Control Charts for Monitoring Delivery Chains Systems
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in European Journal of Industrial Engineering (2017)

Continuous monitoring of Delivery Time variables by means of control charts in a delivery chain is a very recent application of Statistical Process Control (SPC) to the service sector. The aim of the ...

An exact method for designing Shewhart and S2 control charts to guarantee in-control performance
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in International Journal of Production Research (2017), 0(0), 1-15

The three-dimensional rectangular Multiple Bin Size Bin Packing Problem with transportation constraints: A case study in the field of air transportation

in 4OR : Quarterly Journal of the Belgian, French and Italian Operations Research Societies (2017)

Ph. D Thesis summary see other reference on ORBI...

Robust asymptotic tests for the equality of multivariate coefficients of variation
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in TEST (2017), 26(1), 163-187

In order to easily compare several populations on the basis of more than one feature, multivariate coefficients of variation (MCV) may be used as they allow to summarize relative dispersion in a singl...

Cellwise Robust regularized discriminant analysis
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in Statistical Analysis and Data Mining (2017), 10

Quadratic and Linear Discriminant Analysis (QDA/LDA) are the most often applied classification rules under normality. In QDA, a separate covariance matrix is estimated for each group. If there are mor...

Guided Dive for the Spatial Branch-and-Bound
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in Journal of Global Optimization (2017)

We study the spatial Brand-and-Bound algorithm for the global opti- mization of nonlinear problems. In particular we are interested in a method to find quickly good feasible solutions. Most spatial Br...

Exact algorithms for the Equitable Traveling Salesman Problem
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in European Journal of Operational Research (2017)

Given a weighted graph G = (V,E), the Equitable Traveling Salesman Problem (ETSP) asks for two perfect matchings in G such that (1) the two matchings together form a Hamiltonian cycle in G and (2) the...

Parametric conditional variance estimation in location- scale models with censored data
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in Electronic Journal of Statistics (2017), 11

The inventory-routing problem of returnable transport items with time windows and simultaneous pickup and delivery in closed-loop supply chains
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in International Journal of Production Economics (2017), (183), 570-582

Reducing environmental impact, related regulations and potential for operational benefits are the main reasons why companies share their returnable transport items (RTIs) among the different partners ...

How can seed removal rates of zoochoric tree species be assessed quickly and accurately?
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in Forest Ecology and Management (2017), 403

The quantification of seed dispersal and predation processes has been gaining increased importance in the assessment of forest responses to anthropogenic disturbance, but also in developing an underst...

Integrating production scheduling and vehicle routing decisions at the operational decision level: A review and discussion
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in Computers & Industrial Engineering (2017), 104

Production scheduling and vehicle routing are two well-studied problems in literature. Although these supply chain functions are interrelated, they are often solved sequentially. This uncoordinated ap...

Integration of order picking and vehicle routing in a B2C e-commerce context
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in Flexible Services and Manufacturing Journal (2017)

E-commerce sales are increasing every year and customers who buy goods on the Internet have high service level expectations. In order to meet these expectations, a company’s logistics operations nee...

A Quantitative Doignon-Bell-Scarf theorem
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in Combinatorica (2017)

The famous Doignon-Bell-Scarf theorem is a Helly-type result about the existence of integer solutions to systems of linear inequalities. The purpose of this paper is to present the following quantitat...

Quadratic reformulations of nonlinear binary optimization problems
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in Mathematical Programming (2017), 162

Very large nonlinear unconstrained binary optimization problems arise in a broad array of applications. Several exact or heuristic techniques have proved quite successful for solving many of these pro...

Iterated local search for the capacitated vehicle routing problem with sequence-based pallet loading and axle weight constraints
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in Networks (2017), 69(3), 304316

In this article an Iterated Local Search algorithm for the capacitated vehicle routing problem with sequence-based pallet loading and axle weight constraints is presented. Axle weight limits impose a ...

Large neighborhood search for multi-trip vehicle routing
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in European Journal of Operational Research (2016), 255(2), 422-441

We consider the multi-trip vehicle routing problem, in which each vehicle can perform several routes during the same working shift to serve a set of customers. The problem arises when customers are cl...

Revealed preference tests of collectively rational consumption behavior: formulations and algorithms
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in Operations Research (2016), 64(6), 11971216

This paper focuses on revealed preference tests of the collective model of household consumption. We start by showing that the decision problems corresponding to testing collective rationality are {\s...

Estimating the out-of-sample predictive ability of trading rules: a robust bootstrap approach
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in Journal of Forecasting (2016), 35(4), 347-372

In this paper, we provide a novel way to estimate the out-of-sample predictive ability of a trading rule. Usually, this ability is estimated using a sample splitting scheme, true out-of-sample data be...

Text analytics in industry: Challenges, desiderata and trends
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in Computers in Industry (2016), (78),

Editorial: Special issue on natural language processing and text analytics in industry
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in Computers in Industry (2016)

Special issue on natural language processing and text analytics in industry
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in Computers in Industry (2016), 78

A Mixed Integer Programming formulation for the three dimensional bin packing problem deriving from an air cargo application
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in International Transactions in Operational Research (2016), 23(1-2), 187-213

The present paper looks into the problem of optimising the loading of boxes into containers. The goal is to minimise the unused volume. This type of problem belongs to the family of Multiple Bin Size ...

External Costs as Competitiveness Factors for Freight Transport — A State of the Art
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in Transport Reviews (2016), 36(6), 692-712

External costs have been a key issue in the last years of transport research. In Europe, this trend is in line with the political willingness to internalize externalities in transport pricing policies...

Bi-objective Road and Pipe Network Design for Crude Oil Transport in the Sfax Region in Tunisia
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in Procedia Engineering (2016), 142

In this paper, we examine a bi-objective road and pipe network design for crude oil transport in the Sfax region in Tunisia. In particular, we search for the minimum spanning trees (MST) that connect ...

A Statistically adaptive sampling policy to the Hotelling's T2 Control Chart: Markov Chain Approach
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in Communications in Statistics : Theory and Methods (2016)

The Robust Economic Statistical Design of the Hotelling’s T^2 Chart
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in Communications in Statistics : Theory and Methods (2016)

Economic statistical designs aim at minimizing the cost of process monitoring when a specific scenario or a set of estimated process and cost parameters is given. However, in practical situations the ...

in 4OR : Quarterly Journal of the Belgian, French and Italian Operations Research Societies (2016)

This is a summary of the author's PhD thesis supervised by Michael Schyns and defended on April 29, 2016 at the University of Li\ege, Belgium. We examine two problems as part of this dissertation. Th...

Distribution under elliptical symmetry of a distance-based multivariate coefficient of variation
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in Statistical Papers (2016)

DSIMA: A testbed for the quantitative analysis of interaction models within distribution networks
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in Sustainable Energy, Grids and Networks (2016), 5

This article proposes an open-source testbed to simulate interaction models governing the exchange of flexibility services located within a distribution network. The testbed is an agent-based system i...

Box search for the data mining of the key parameters of an industrial process
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in Intelligent Data Analysis (2016), 20(6),

To increase their competitiveness, many industrial companies monitor their production process, collecting large amount of measurements. This paper describes a technique using this data to improve the ...

Conditional portfolio allocation: Does aggregate market liquidity matter?
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in Journal of Empirical Finance (2016), 35

This paper investigates how aggregate liquidity influences optimal portfolio allocations across various US characteristic portfolios. We consider short-term allocation problems, with single and multip...

Logistics Service Quality: The Case of Da Nang City
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in Procedia Engineering (2016), 142

Cost minimization is a key objective in managing logistics services. In this context, a growing interest in quality improvement can be observed. However, service quality is hard to quantify as it is a...

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in Discrete Applied Mathematics (2016), 203

A pseudo-Boolean function is a real-valued function $f(x)=f(x_1,x_2,\ldots,x_n)$ of $n$ binary variables; that is, a mapping from $\{0,1\}^n$ to ${\bbr}$. For a pseudo-Boolean function $f(x)$ on $\{0,... Capacitated vehicle routing problem with sequence- based pallet loading and axle weight constraints ; ; ; ; in EURO Journal on Transportation and Logistics (2016), 5(2), 231255 In this paper, we introduce and study the capacitated vehicle routing problem with sequence-based pallet loading and axle weight constraints. To the best of our knowledge, it is the first time that ax... Multivariate coefficients of variation: Comparison and influence functions ; ; in Journal of Multivariate Analysis (2015), 142 In the univariate setting, coeﬃcients of variation are well-known and used to compare the variability of populations characterized by variables expressed in diﬀerent units or having really diﬀer... An Ant Colony System for Responsive Dynamic Vehicle Routing in European Journal of Operational Research (2015), 245(3), 704-718 We present an algorithm based on an Ant Colony System to deal with a broad range of Dynamic Capacitated Vehicle Routing Problems with Time Windows, (partial) Split Delivery and Heterogeneous fleets (D... The Airline Container Loading Problem with Pickup and Delivery ; in European Journal of Operational Research (2015), 244(3), 955-965 This paper considers the loading optimization problem for a set of containers and pallets transported into a cargo aircraft that serves multiple airports. Because of pickup and delivery operations tha... Evaluation of the Economic Statistical Design of the Multivariate T2 Control Chart with Multiple Variable Sampling Intervals Scheme: NSGA-II Approach ; ; in Journal of Statistical Computation & Simulation (2015), 85(12), 2442-2455 The economic and statistical merits of a multiple variable sampling intervals (MVSI) scheme are studied. The problem is formulated as a double-objective optimization problem with the adjusted average ... The strength of multi-row models ; ; in Mathematical Programming Computation (2015), 7(2), 113-148 We develop a method for computing facet-defining valid inequalities for any mixed-integer set PJ. Our practical implementation does not return only facet- defining inequalities, but it is able to find... Valid inequalities for the single arc design problem with set-ups ; ; in Discrete Optimization (2015), 16 We consider a mixed integer set which generalizes two well-known sets: the single node fixed- charge network set and the single arc design set. Such set arises as a relaxation of feasible sets of gene... Multi-period stochastic optimization problems in transportation management (Ph. D. Thesis Summary) in 4OR : Quarterly Journal of the Belgian, French and Italian Operations Research Societies (2015), 13(1), 113-114 Ph. D Thesis summary see other reference on ORBI... Guaranteed Conditional Performance of the S2 Control Chart with Estimated Parameters ; ; in International Journal of Production Research (2015) We evaluate the in-control performance of the S2 control chart with estimated parameters conditional on the Phase I sample. Simulation results indicate no realistic amount of Phase I data is enough to... The impact of transport policies on railroad intermodal freight competitiveness – The case of Belgium ; ; in Transportation Research. Part D : Transport and Environment (2015), 34 This paper discusses the impact of three freight transport policies aiming to promote railroad intermodal transport in Europe, and examines the case of Belgium as a testing ground. These policies cons... Shewhart Control Charts for Monitoring Reliability with Weibull Lifetimes ; ; in Quality and Reliability Engineering International (2015), 31 In this paper, we present Shewhart type Z ̅ and S2 control charts for monitoring individual or joint shifts in the scale and shape parameters of a Weibull distributed process. The advantage of this m... A note on testing axioms of revealed preference ; ; in Journal of Optimization Theory & Applications (2015), 166(3), 1063-1070 Transitive preferences in multi-member households ; ; ; ; in Economic Theory Bulletin (2015), 3 Complexity results for the Weak Axiom of Revealed Preference for collective consumption models ; ; ; ; in Journal of Mathematical Economics (2015), 58 Estimation of the error distribution in a semiparametric transformation model. ; ; in Electronic Journal of Statistics (2015), 9 Estimation of the error density in a semiparametric transformation model ; ; ; in Annals of the Institute of Statistical Mathematics (2015), 67 Vehicle routing problems with loading constraints: State-of-the-art and future directions ; ; ; ; in OR Spectrum (2015), 37(Issue 2), 297-330 Distributors are faced with loading constraints in their route planning, e.g.,multi-dimensional packing constraints, unloading sequence constraints, stability constraints and axle weight limits. Ignor... Control Charts monitoring product’s loss to society ; ; in Quality and Reliability Engineering International (2014), 30(8), 1393-1407 Taguchi introduced a new philosophy in quality control that accounts for the economic loss associated to process variation measured by deviations from the target value of a product quality characteris... Statistical performance of a control chart monitoring the ratio of two normal variables ; ; ; in Quality and Reliability Engineering International (2014), 30(8), 1361-1377 On-line Statistical Process Control (SPC) monitoring the ratio Z of two normal variables X and Y has surprisingly received too little attention in the quality control literature. Several potential app... Economic Statistical Design of the VP( X) ̅ Control Charts for Monitoring a Process under Non-normality ; ; in International Journal of Production Research (2014), 53(14), 4218-4230 Recent studies proved that variable parameters (VP) X ̅ control charts not only detects process mean shifts quicker than the classical X ̅ control chart but also has better economic properties. Furt... Multi-period vehicle loading with stochastic release dates ; ; ; ; in EURO Journal on Transportation and Logistics (2014), 3(2), 93-119 This paper investigates a multi-period vehicle loading problem with stochastic information regarding the release dates of items to be transported. The deterministic version of the problem can be formu... The variable parameters T2 chart with run rules ; ; ; ; in Statistical Papers (2014), 55(4), 933-950 The Hotelling’s T2 control chart with variable parameters (VP T2) has been shown to have better statistical performance than other adaptive control schemes in detecting small to moderate process mea... Integer Programs with Prescribed Number of Solutions and a Weighted Version of Doignon-Bell-Scarf’s Theorem ; ; in Lecture Notes in Computer Science (2014) In this paper we study a generalization of the classical fesibility problem in integer linear programming, where an ILP needs to have a prescribed number of solutions to be considered solved. We first... Special Issue on Natural Language Processing and Information Systems ; ; ; ; in Data & Knowledge Engineering (2014), 90 A learning procedure for sampling semantically different valid expressions ; ; ; in International Journal of Artificial Intelligence (2014), 12(1), 18-35 A large number of problems can be formalized as finding the best symbolic expression to maximize a given numerical objective. Most approaches to approximately solve such problems rely on random explor... An algorithm for the separation of two-row cuts ; in Mathematical Programming (2014), 143(1-2), 111-146 We consider the question of finding deep cuts from a model with two rows of the type PI = {(x,s) ∈ Z2 ×Rn+ : x = f +Rs}. To do that, we show how to reduce the complexity of setting up the polar of ... Likelihood based inference for semi-competing risks ; ; ; in Communications in Statistics : Simulation and Computation (2014), 43(5), 1112-1132 Double Objective Economic Statistical Design of the VPT2 Control Chart: Wald’s identity approach ; ; ; in Journal of Statistical Computation & Simulation (2014), 84 Recent studies have shown that applying the control chart by using a variable parameters (VP) scheme yields more rapid detection of assignable causes than the classical method of taking fixed sample s... A combinatorial branch-and-bound algorithm for box search ; in Discrete Optimization (2014), 13 Considering a set of points in a multi-dimensional space with an associated real value for each point, we want to find the box with the maximum sum of the values of the included points. This problem h... Goodness of fit measures for revealed preference tests: complexity results and algorithms ; ; ; in ACM Transactions on Economics and Computation (2014), 2(1), 3 Natural Language Processing and Information Systems ; ; ; ; in Data & Knowledge Engineering (2014) Multi-Dimensional Vector Assignment Problems ; ; in Discrete Optimization (2014), 14 We consider a special class of axial multi-dimensional assignment problems called multi- dimensional vector assignment (MVA) problems. An instance of the MVA problem is defined by m disjoint sets, eac... Integration of inland waterway transport in the intermodal supply chain: a taxonomy of research challenges ; ; ; ; in Journal of Transport Geography (2014), 41 This paper identifies research opportunities which will enable the further integration of inland waterway transport in the intermodal supply chain. Intermodal transport may be interpreted as a chain o... Crisis management: Lessons learnt from BP Deepwater Horizon Spill Oil in Business Management and Strategy (2013), 4(1), 69-90 Design and dimensioning of hydrogen transmission pipeline networks in European Journal of Operational Research (2013), 229(1), 239-251 Monitoring delivery chains using multivariate control charts ; ; ; in European Journal of Operational Research (2013), 228(1), 282289 Delivery chains are concerned with the delivery of goods and services to customers within a specific time interval; this time constraint is added to the usual consumer demand for product or service qu... Term extraction from sparse, ungrammatical domain-speciﬁc documents ; in Expert Systems with Applications (2013), 40(7), 2530-2540 Multiobjective Genetic Algorithm Approach to the Economic Statistical Design of Control Charts with an application to Xbar and S2 charts ; in Quality and Reliability Engineering International (2013), 29(3), 407-415 Control charts are the primary tools of statistical process control. These charts may be designed by using a simple rule suggested by Shewhart, by a statistical criterion, an economic criterion or a j... Crisis communication failures: The BP Case Study in International Journal of Advances in Management and Economics (2013), 2(2), 48-56 Vershik’s intermediate level standardness criterion and the scale of an automorphism in Lecture Notes in Mathematics (2013) Vershik’s standardness criterion takes a particular form of combinatorial nature in the case of$r_n$-adic filtrations, which we call Vershik’s intermediate level criterion in this paper. This cri... Robust optimization for resource-constrained project scheduling with uncertain activity durations ; ; in Flexible Services and Manufacturing Journal (2013), 25(1-2), The purpose of this paper is to propose models for project scheduling when there is considerable uncertainty in the activity durations, to the extent that the decision maker cannot with confidence ass... Min max generalization for deterministic batch mode reinforcement learning: relaxation schemes ; ; ; in SIAM Journal on Control & Optimization (2013), 51(5), 33553385 We study the min max optimization problem introduced in Fonteneau et al. [Towards min max reinforcement learning, ICAART 2010, Springer, Heidelberg, 2011, pp. 61–77] for computing policies for batch... Power indices and the measurement of control in corporate structures ; in International Game Theory Review (2013), 15 This paper proposes a brief review of the use of power indices in the corporate governance literature. Without losing sight of the field of application, it places the emphasis on the game-theoretic as... The Money Pump as a Measure of Revealed Preference Violations: A Comment ; ; ; in Journal of Political Economy (2013), 121(6), 1248-1258 Investigation of advanced materials for fusion alpha particle diagnostics ; ; ; ; ; ; ; ; ; ; ; ; ; in Fusion Engineering & Design (2013) Fusion alpha particle diagnostics for ITER remain a challenging task. Standard escaping alpha particle detectors in present tokamaks are not applicable to ITER and techniques suitable for fusion react... Penalized Pro led Semiparametric Estimating Functions ; ; ; in Electronic Journal of Statistics (2013), 7 Optimal T2 control chart with double sampling scheme - an alternative to the MEWMA chart ; ; in Quality and Reliability Engineering International (2012), 28(7), 751-760 Recent studies have shown that the double sampling (DS) scheme yields rapid detection of out of control situations, but the economic consequences of applying the proposed method are not discussed in t... A leader-follower game in competitive facility location ; ; in Computers & Operations Research (2012), 39(2), 437-448 We address the problem of locating new facilities of a firm or franchise that enters a market where a competitor operates existing facilities. The goal of the new entrant firm is to decide the locatio... On the advantages of economically designed the Hotelling’s T2 control chart with variable sample sizes and sampling intervals ; ; ; in Quality & Quantity (2012), 46(1), 39-53 Faraz and Parsian (Statistical Paper, 47: 569–593, 2006) have shown that the double warning lines (DWL) scheme detects process shifts more quickly than the other variable ratio sampling schemes such... Automatic Aircraft Load Planning ; ; in Journal of the Operational Research Society (2012), 63 The goal of this paper is the development of a new mixed integer linear program designed for optimally loading a set of containers and pallets into a compartmentalised cargo aircraft. It is based on r... A Meta Model to Optimally Design the VSI T2 Control Chart ; in international Journal of Applied Operational Research (2012), 1(3), 53-69 Recent studies have shown that the variable sampling interval (VSI) scheme helps practitioners to detect process shifts more quickly than the classical scheme (FRS). In this paper, the economically an... Ciftduzeyli Bir Rekabetci Tesis Yer Secimi Problemi Icin Tabu Arama Sezgiseli ; ; in Endustri Muhendisligi Dergisi (2012), 23(1), 28-39 In this study, the problem of a firm is considered where the firm tries to open new facilities in a market where there are already existing facilities belonging to a competitor. The new entrant firm w... A heuristic method to schedule training programs for Small and Medium Enterprises ; ; ; in European Journal of Operational Research (2012), 217 During the life period of Small and Medium Enterprises (SMEs) in incubators they need some training programs to acquire the required knowledge in order to survive and succeed in the business environme... Scale checks in censored regression ; in Scandinavian Journal of Statistics (2012), 39 Testing for one-sided alternatives in nonparametric censored regression ; in TEST (2012), 21(3), 498-518 The interval ordering problem ; ; ; ; in Discrete Applied Mathematics (2012) Statistical Merits and Economic Evaluation of T2 Control Charts with the VSSC Scheme ; ; ; in Arabian Journal for Science and Engineering (2011), 36(7), 1461-1470 T2 control charts are used to monitor a process when more than one quality variable associated with the process is being observed. Recent studies have shown that using variable sampling size (VSS) sch... A modified economic-statistical design of the T2 control chart with variable sample sizes and control limits ; ; ; ; in Journal of Applied Statistics (2011), 38(11), 2459-2469 Recent studies have shown that using variable sampling size and control limits (VSSC) schemes result in charts with more statistical power than variable sampling size (VSS) when detecting small to mod... A unification and some corrections to Markov chain approaches to develop variable ratio sampling scheme control charts ; in Statistical Papers (2011), 52(4), 799-811 We provide some unifying definitions, make some corrections to articles by Faraz and Parsian (J Stat Pap 47:569–593, 2006) and Costa (JQual Technol 26:155– 163, 1994; 29:197–204, 1997), and usin... Split rank of triangle and quadrilateral inequalities ; in Mathematics of Operations Research (2011), 36(3), 432-461 A simple relaxation of two rows of a simplex tableau is a mixed integer set consisting of two equations with two free integer variables and non-negative continuous variables. Recently Andersen et al. ... On the properties of the hotelling’s T2 control chart with variable sampling intervals ; ; in Quality & Quantity (2011), 45(3), 579-586 When T 2 control chart is used to monitor a process, it is usually assumed that the samples of size n0 is taken at constant intervals t0 . In this paper, we investigate the T 2 control chart for monit... Economic Statistical Design of a T2 Control Chart with Double Warning Lines ; in Quality and Reliability Engineering International (2011), 27(2), 125-139 Recent studies have shown that enhancing the common T2 control chart by using variable sample sizes (VSS) and variable sample intervals (VSI) sampling policies with a double warning line scheme (DWL) ... Identification of the linear parts of nonlinear systems for fuzzy modeling in Applied Soft Computing (2011), 11 In direct approach to fuzzy modeling, structure identification is one of the most critical tasks. In modeling the nonlinear system, this fact is more crucial. In this paper, a new hybrid method is pro... A Bayesian framework for the ratio of two Poisson rates in the context of vaccine efficacy trials ; in ESAIM: Probability and Statistics = Probabilité et statistique : P & S (2011) In many applications, we assume that two random observations x and y are generated according to independent Poisson distributions and we are interested in performing statistical inference on the ratio... Facility location via fuzzy modeling and simulation ; in Applied Soft Computing (2011), 11(8), 5330-5340 This paper presents a continuous facility location model with fuzzy methodology. The developments concern mainly to some drawbacks in the initial model which takes it far from being used in practice. ... A discrete competitive facility location model with variable attractiveness ; ; in Journal of the Operational Research Society (2011), 62(9), 1726-1741 We consider the discrete version of the competitive facility location problem in which new facilities have to be located by a new market entrant firm to compete against already existing facilities tha... Competitive facility location problem with attractiveness adjustment of the follower: A bilevel programming model and its solution ; ; in European Journal of Operational Research (2011), 208(3), 206-220 We are concerned with a problem in which a firm or franchise enters a market by locating new facilities where there are existing facilities belonging to a competitor. The firm aims at finding the loca... Coloring Graphs Using Two Colors while Avoiding Monochromatic Cycles ; ; ; in INFORMS Journal on Computing (2011) We consider the problem of deciding whether a given directed graph can be vertex partitioned into two acyclic subgraphs. Applications of this problem include testing rationality of collective consumpt... Improving Product Quality and Reliability with Customer Experience Data ; ; ; ; ; ; ; ; in Quality and Reliability Engineering International (2011), 28(8), 873886 The Mathematics of Peter L. Hammer (1936-2006): Graphs, Optimization, and Boolean Models ; ; ; ; ; in Annals of Operations Research (2011), 188 This volume contains a collection of papers published in memory of Peter L. Hammer (1936-2006). Peter Hammer made substantial contributions to several areas of operations research and discrete mathema... Logical Analysis of Data: Classification with justification ; ; ; ; ; in Annals of Operations Research (2011), 188 Learning from examples is a frequently arising challenge, with a large number of algorithms proposed in the classification, data mining and machine learning literature. The evaluation of the quality o... Economic and Economical Statistical Design of Hotelling’s T2 Control Chart with Two-State Adaptive Sample Size ; ; in Journal of Statistical Computation & Simulation (2010), 80(12), 12991316 The Hotelling’s T 2 control chart, a direct analogue of the univariate Shewhart ¯X chart, is perhaps the most commonly used tool in industry for simultaneous monitoring of several quality character... ECONOMICALLY DESIGNED HOTELLING’S T2 CONTROL CHART USING VSICL SCHEME ; ; in Arabian Journal for Science & Engineering (2010), 35(2), 251263 The Hotelling’s T2 control chart, is the most widely used multivariate procedure for two or more related quality characteristics, but it’s power lacks the desired performance in detecting small to... An application of fuzzy random variables to control charts ; in Fuzzy Sets & Systems (2010), 161(20), 26842694 The two most significant sources of uncertainty are randomness and incomplete information. In real systems, we wish to monitor processes in the presence of these two kinds of uncertainty. This paper a... Space and time allocation in a shipyard assembly hall ; ; ; in Annals of Operations Research (2010), 179(1), 57-76 We present a space and time allocation problem that arises in assembly halls producing large building blocks (namely, a shipyard which assembles prefabricated keel elements). The building blocks are v... Constructing a fuzzy Shewhart control chart for variables when uncertainty and randomness are combined ; ; ; in Quality & Quantity (2010), 44(5), 905-914 In this paper we introduce a fuzzy chart for variables which is used in situations when uncertainty and randomness are combined. It is showed that the Shewhart chart’s control limits must be adjuste... Mixed-integer sets from two rows of two adjacent simplex bases ; ; in Mathematical Programming (2010), 124(1-2), 455-480 In 2007 we studied a mixed-integer set arising from two rows of a simplex tableau. We showed that facets of such a set can be obtained from lattice point free triangles and quadrilaterals associated w... Throughput optimization in two-machine flowshops with flexible operations ; in Journal of Scheduling (2010), 13(3), 227-243 In this study, a two-machine flowshop producing identical parts is considered. Each of the identical parts is assumed to require a number of manufacturing operations, and the machines are assumed to b... RelaxMCD: smooth optimisation for the Minimum Covariance Determinant estimator ; ; in Computational Statistics & Data Analysis (2010), 54(4), 843-857 The Minimum Covariance Determinant (MCD) estimator is a highly robust procedure for estimating the center and shape of a high dimensional data set. It consists of determining a subsample of h points o... « Market area of intermodal rail-road container terminals embedded in a hub-and–spoke network ; in Papers in Regional Science (2010), 89(1), 135154 This paper presents a methodology able to compare road and rail-road intermodal market areas that takes the network structures, the operation costs and the location of the rail-road terminals into acc... An analysis of mixed integer linear sets based on lattice point free convex sets ; ; in Mathematics of Operations Research (2010), 35(1), 233-256 The set obtained by adding all cuts whose validity follows from a maximal lattice free polyhedron with max-facet-width at most w is called the w th split closure. We show the w th split closure is a p... A relaxed approach to combinatorial problems in robustness and diagnostics ; ; ; ; ; ; in Statistics and Computing (2010), 20(1), 99-115 A range of procedures in both robustness and diagnostics require optimisation of a target functional over all subsamples of given size. Whereas such combinatorial problems are extremely difficult to s... Optimal selection of a portfolio of options under Value-at-Risk constraints: a scenario approach ; ; in Annals of Operations Research (2010), 181 This paper introduces a multiperiod model for the optimal selection of a financial portfolio of options linked to a single index. The objective of the model is to maximize the expected return of the p... On Vershikian and I-cosy random variables and filtrations in Teoriya Veroyatnostei i ee Primeneniya (2010), 55 We prove that the equivalence between Vershik’s standardness criterion and the I-cosiness criterion for a filtration in discrete, negative time, holds separately for each random variable. This gives... On standardness and I-cosiness in Séminaire de Probabilités (2010), XLIII The object of study of this work is the invariant characteristics of filtrations in discrete, negative time, pioneered by Vershik. We prove the equivalence between I-cosiness and standardness without ... Further comments on the representation problem for stationary processes in Statistics & Probability Letters (2010), 80 We comment on some points about the coding of stochastic processes by sequences of independent random variables. The most interesting question has to do with the standardness property of the filtratio... The Optimal Design of the VSI T2 Control Chart ; ; ; in Journal of Iranian Statistical Society (2010), 9(1), 1-19 Recent studies have shown that the variable sampling interval (VSI) scheme helps practitioners detect process shifts more quickly than the classical scheme (FRS). In this paper, the economically and s... A robust heuristic for the optimal selection of a portfolio of stocks in International Journal of Operational Research (2010), 9(3), 258-271 This paper introduces a new optimization heuristic for the robustification of critical inputs under consideration in many problems. It is shown that it allows to improve significantly the quality and ... Statistical process control and delivery chains ; in International Journal of Industrial Engineering & Production Research (2010), 21(3), 55-66 Antibubble lifetime: influence of the bulk viscosity and of the surface modulus of the mixture ; ; ; ; ; ; in Colloids and Surfaces A : Physicochemical and Engineering Aspects (2010) Goodness-of-fit tests for the error distribution in nonparametric regression ; in Computational Statistics & Data Analysis (2010), 54 Estimation in nonparametric location-scale regression models with censored data ; in Annals of the Institute of Statistical Mathematics (2010), 62 Hotelling’s T 2 control chart with two adaptive sample sizes ; in Quality & Quantity (2009), 43 Some quality control schemes have been developed when several related quality characteristics are to be monitored. The familiar multivariate process monitoring and control procedure is the Hotelling... Improving the power of out of control states detection in multivariate processes using variable sampling intervals policy ; ; in Journal of Applied Mathematics (2009), 23 The familiar multivariate process monitoring and control procedure is the Hotelling’s T2 control chart, a direct analog of the univariate shewhart chart. But, its efficiency for detecting small to m... Statistical design of the Hotelling’s T2 control chart with variable ratio sampling scheme using genetic algorithms ; ; in Journal of Applied Mathematics (2009), 6(22), 77-89 The familiar multivariate process monitoring and control procedure is the Hotelling’s T2 control chart, a direct analog of the univariate shewhart chart. But, its efficiency for detecting small to m... Hotelling’s T2 control chart with two adaptive sample sizes ; in Quality & Quantity (2009), 43(6), 903-913 Some quality control schemes have been developed when several related quality characteristics are to be monitored. The familiar multivariate process monitoring and control procedure is the Hotelling... Optimal rail-road container terminal locations on the European network ; in Transportation Research. Part E: Logistics and Transportation Review (2009), 45(4), 551-563 The European transport policy has focused on sustainable transport solutions, among which intermodal transport is a key player. However, its efficiency is strongly dependent on the location of the con... Certificates of linear mixed integer infeasibility ; ; in Operations Research Letters (2008), 36(6), 734-738 We derive a certificate of integral infeasibility for linear systems with equations and inequalities by generating algebraically an outer description of a lattice point free polyhedron that contains t... Inventory control in a decentralised two-stage make-to-stock queueing system ; in International Journal of Systems Science (2008), 39(7), In an Enterprise network, several companies interact to produce families of goods. Each member company seeks to optimise his own production and inventory policy to maximise his profit. These objective... Polyhedral properties for the intersection of two knapsacks ; in Mathematical Programming (2008), 113(1), 15-37 We address the question to what extent polyhedral knowledge about individual knapsack constraints suffices or lacks to describe the convex hull of the binary solutions to their intersection. It turns ... Intermediate integer programming representations using value disjunctions ; ; in Discrete Optimization (2008), 5(2), 293-313 We introduce a general technique to create an extended formulation of a mixed-integer program. We classify the integer variables into blocks, each of which generates a finite set of vector values. The... A new method to fuzzy modeling and its application in performance evaluation of tenants in incubators in International Journal of Advanced Manufacturing Technology (2008), 37 As we know fuzzy modeling is one of the most powerful techniques to extract experts’ knowledge in the form of fuzzy if-then rules. In this research work, a new method to fuzzy modeling is proposed i... Strong uniform consistency results of the weighted average of conditional artificial data points in Journal of Statistical Planning & Inference (2008), 138(5), 1496-1515 In this paper, we study strong uniform consistency of a weighted average of artificial data points. This is especially useful when information is incomplete (censored data, missing data ...). In this ... Supply chain coordination: A game-theory approach ; in Engineering Applications of Artificial Intelligence (2008), 21 In a supply chain organized as a network of autonomous enterprises, the main objective of each partner is to optimize his production and supply policy with respect to his own economic criterion. Confl... Practical methods for measuring and managing operational risk in the financial sector: A clinical study ; ; ; in Journal of Banking and Finance (2008), 32 This paper analyzes the implications of the Advanced Measurement Approach (AMA) for the assessment of operational risk. Through a clinical case study on a matrix of two selected business lines and two... Geršgorin variations III: On a theme of Brualdi and Varga ; ; ; in Journal of Linear Algebra and its Applications (2008), 428 Brualdi brought to Geršgorin Theory the concept that the digraph G(A) of a matrix A is important in studying whether A is singular. He proved, for example, that if, for every directed cycle of G(A), ... Counting and enumerating aggregate classifiers ; ; ; in Discrete Applied Mathematics (2008), 156(3), 2459-2468 We propose a generic model for the "weighted voting" aggregation step performed by several methods in supervised classification. Further, we construct an algorithm to count the number of dis... The tool switching problem revisited ; ; ; in European Journal of Operational Research (2007), 182(2), 952-957 In this note we study the tool switching problem with non-uniform tool sizes. More specifically, we consider the problem where the job sequence is given as part of the input. We show that the resultin... Inequalities from two rows of the simplex tableau ; ; ; in Lecture Notes in Computer Science (2007) In this paper we explore the geometry of the integer points in a cone rooted at a rational point. This basic geometric object allows us to establish some links between lattice point free bodies and th... Control and voting power in corporate networks: Concepts and computational aspects ; in European Journal of Operational Research (2007), 178(3), 879-893 This paper proposes to rely on power indices to measure the amount of control held by individual shareholders in corporate networks. The value of the indices is determined by a complex voting game vie... Peter Ladislaw Hammer (1936-2006) ; ; in 4OR : Quarterly Journal of the Belgian, French and Italian Operations Research Societies (2007), 5(1), 1-4 Multiplicity and complexity issues in contemporary production scheduling ; ; ; in Statistica Neerlandica (2007), 61(1), 75-91 High multiplicity scheduling problems arise naturally in contemporary production settings where manufacturers combine economies of scale with high product variety. Despite their frequent occurrence in... Fuzzy Control Chart A Better Alternative for Shewhart Average Chart ; in Quality & Quantity (2007), 41(3), 375-385 This paper through a real illustrative example and a power test shows that designing a fuzzy control chart for process average of a continuous (variable) quality characteristic with a warning line is ... Lifting, Superadditivity, Mixed Integer Rounding and Single Node Flow Sets Revisited ; in Annals of Operations Research (2007), 153(1), 47-77 In this survey we attempt to give a unified presentation of a variety of results on the lifting of valid inequalities, as well as a standard procedure com- bining mixed integer rounding with lifting f... Nonlinear regression with censored data ; in Technometrics (2007), 49(1), 34-44 Suppose that the random vector (X, Y) satisfies the regression model Y = m(X) + sigma(X)epsilon, where m(.) = E(Y vertical bar.) belongs to some parametric class (m(theta)(.):theta is an element of Th... Polynomial regression with censored data based on preliminary nonparametric estimation. ; in Annals of the Institute of Statistical Mathematics (2007), 59 Location estimation in nonparametric regression with censored data ; in Journal Of Multivariate Analysis (2007), 98(8), 1558-1582 Consider the heteroscedastic model Y =m (X) +sigma(X)epsilon, where epsilon and X are independent, Y is subject to right censoring, m (center dot) is an unknown but smooth location function (like e.g.... Polynomial regression with censored data based on preliminary nonparametric estimation ; in Annals of the Institute of Statistical Mathematics (2007), 59(2), 273-297 Consider the polynomial regression model Y = (beta)0 + beta(1) X + center dot center dot center dot beta X-p(p) + sigma (X)epsilon, where sigma(2)(X) = Var(Y vertical bar X) is unknown, and epsilon is... Une procédure d’affectation multi-flux et multimodale appliquée aux réseaux transeuropéens de transport de fret ; in Les Cahiers Scientifiques du Transports (2007), 52 Les modèles multimodaux de fret so ellement basés sur le modèle à quatre étapes dans lequel la génération, la distribution, la répartition modale et l’affectation sont autant de modules sép... Rail-Road terminal locations: aggregation errors and best potential locations on large networks ; in European Journal of Transport and Infrastructure Research (2007), 7(4), 317-334 In network location problems, the number of potential locations is often too large in order to find a solution in a reasonable computing time. That is why aggregation techniques are often used to redu... Equilibrium traffic assignment on large Virtual Networks: Implementation issues and limits for multi-modal freight transport ; in European Journal of Transport and Infrastructure Research (2006), 6(3), 205-228 Multi-Modal freight models are traditionally built following the well known “four steps model” in which generation, distribution, modal-split and assignment are seen as separated modules. An alter... Hotelling's T 2 control chart with double warning lines ; in Statistical Papers (2006), 47(4), 569-593 Recent studies have shown that the T 2 control chart with variable sampling intervals (VSI) and/or variable sample sizes (VSS) detects process shitis faster than the traditional T 2 chart. This articl... Inventory control in a multi-supplier system ; in International Journal of Production Economics (2006), 104 An enterprise network is analyzed from the viewpoint of an end-product manufacturer who receives customer orders and organises his production and supply policy so as to minimize the sum of his average... Optimization of Surface Utilization Using Heuristic Approaches ; ; ; ; ; in Ship Technology Research = Schiffstechnik (2005), 52(3), 141-147 We present a scheduling problem that arises in factories producing large building blocks. This is a three dimensional bin-packing problem with two spatial dimensions and a time dimension. We propose a... A framework for the complexity of high-multiplicity scheduling problems ; ; ; in Journal of Combinatorial Optimization (2005), 9(3), 313-323 The purpose of this note is to propose a complexity framework for the analysis of high multiplicity scheduling problems. Part of this framework relies on earlier work aiming at the definition of outpu... Consensus algorithms for the generation of all maximal bicliques ; ; ; ; ; in Discrete Applied Mathematics (2004), 145(1 Sp. Iss. SI), 11-21 We describe a new algorithm for generating all maximal bicliques (i.e. complete bipartite. not necessarily induced subgraphs) of a graph. The algorithm is inspired by, and is quite similar to. the con... Optimal procurement decisions in the presence of total quantity discounts and alternative product recipes ; ; in European Journal of Operational Research (2004), 159(2), 364-378 We describe the purchasing decisions faced by a multi-plant company. The suppliers of this company offer complex discount schedules based on the total quantity (rather than cost) of ingredients purcha... The maximum deviation just-in-time scheduling problem ; in Discrete Applied Mathematics (2004), 134(1-3), 25-50 This note revisits the maximum deviation just-in-time (MDJIT) scheduling problem previously investigated by Steiner and Yeomans. Its main result is a set of algebraic necessary and sufficient conditio... A two-stage stochastic programming framework for transportation planning in disaster response ; in Journal of the Operational Research Society (2004), 55 This study proposes a two-stage stochastic programming model to plan the transportation of vital first-aid commodities to disaster-affected areas during emergency response. A multi-commodity, multi-mo... Extended formulations for Gomory Corner polyhedra ; ; ; in Discrete Optimization (2004), 1(2), 141-165 We present several types of extended formulations for integer programs, based on irreducible integer solutions to Gomory’s group relaxations. We present algorithmic schemes based on an iterative ref... Simulated annealing for complex portfolio selection problems ; in European Journal of Operational Research (2003), 150(3), 546-571 This paper describes the application of a simulated annealing approach to the solution of a complex portfolio selection model. The model is a mixed integer quadratic programming problem which arises w... Lifting, Superadditivity, Mixed Integer Rounding and Single Node Flow Sets Revisited ; in 4OR : Quarterly Journal of the Belgian, French and Italian Operations Research Societies (2003), 1 In this survey we attempt to give a unified presentation of a variety of results on the lifting of valid inequalities, as well as a standard procedure combining mixed integer rounding with lifting for... Investigation of the range and effective factors on protein energy malnutrition based on nutritional classification of rural zone of Arak in children less than five years ; ; ; in Arak Medical University Journal (2003), 6(2(23)), 7-13 Introduction: The protein-energy malnutrition is the most prevalent cause of malnutrition and always occures in infants and children under 5 years old. According to the harmful effects of malnutrition... Approximation algorithms for the design of SDH/SONET networks ; ; ; ; in RAIRO : Operations Research = Recherche Opérationnelle (2003), 37(4, OCT-DEC), 235-247 In this paper, a graph partitioning problem that arises in the design of SONET/SDH networks is defined and formalized. Approximation algorithms with performance guarantees are presented. To solve this... Production planning problems in printed circuit board assembly ; ; in Discrete Applied Mathematics (2002), 123(1-3), 339-361 This survey describes some of the main optimization problems arising in the context of production planning for the assembly of printed circuit boards. The discussion is structured around a hierarchica... Combining problem structure and basis reduction to solve a class of hard integer programs ; in Mathematics of Operations Research (2002), 27(3), 470-484 We consider a hard integer programming problem that is difficult for the standard branch-and-bound approach even for small instances. A reformulation based on lattice basis reduction is known to be mo... Cyclic scheduling in robotic flowshops ; ; ; in Annals of Operations Research (2000), 96 Fully automated production cells consisting of flexible machines and a material handling robot have become commonplace in contemporary manufacturing systems. Much research on scheduling problems arisi... Boolean normal forms, shellability and reliability computations ; ; ; ; ; in SIAM Journal on Discrete Mathematics (2000), 13 Orthogonal forms of positive Boolean functions play an important role in reliability theory, since the probability that they take value 1 can be easily computed. However, few classes of disjunctive no... Worst-case performance of approximation algorithms for tool management problems ; in Naval Research Logistics (1999), 46 Since the introduction of flexible manufacturing systems, researchers have investigated various planning and scheduling problems faced by the users of such systems. Several of these problems are not e... Cyclic scheduling in 3-machine robotic flow shops ; in Journal of Scheduling (1999), 2 We consider a robotic flow shop model in which a single robot is responsible for the transportation of parts between machines. For reasons of simplicity, when the shop is to produce a large number of ... Combinatorial optimization models for production scheduling in automated manufacturing systems in European Journal of Operational Research (1997), 99 Production planning and scheduling models arising in automated manufacturing environments exhibit several features not encountered in models developed for traditional production systems. For instance,... Hitting or avoiding balls in Euclidean space ; in Annals of Operations Research (1997), 69 We investigate the algorithmic complexity of several geometric problems of the following type: given a "feasible" box and a collection of balls in Euclidean space, find a feasible point whic... The polytope of block diagonal matrices and complete bipartite partitionings ; in Networks (1997), 30 Motivated by a fundamental clustering problem arising in several areas (production management, marketing, numerical analysis, etc.), we investigate the facial structure of the polytope whose extreme p... Cyclic scheduling of identical parts in a robotic cell ; in Operations Research (1997), 45 We consider a robotic flowshop in which one type of product is to be repeatedly produced and where transportation of the parts between the machines is performed by the robot. The identical parts cycli... Recherche opérationnelle et gestion de la production ; ; in Nouvelles de la Science et des Technologies (1997), 15 Depuis leurs origines, la recherche opérationnelle et la gestion de la production entretiennent des relations privilégiées. Historiquement, la gestion de la production et les domaines connexes de l... Variable and term removal from Boolean formulae ; ; in Discrete Applied Mathematics (1997), 75 Given a Boolean formula in disjunctive normal form, the variable deletion control set problem consists in finding a minimum cardinality set of variables whose deletion from the formula results in a DN... The assembly of printed circuit boards: A case with multiple machines and multiple board types ; ; ; in European Journal of Operational Research (1997), 98 In this paper a typical situation arising in the assembly of printed circuit boards is investigated. The planning problem we face is how to assemble boards of different types using a single line of pl... Models for machine-part grouping in cellular manufacturing ; in International Journal of Production Research (1996), 34 For cellular manufacturing strategies to succeed, the productive system first has to be divided into highly independent cells. This means that a partition of the machines into machine groups, a partit... Scheduling jobs of equal length: complexity, facets and computational results ; in Mathematical Programming (1996), 72 The following problem was originally motivated by a question arising in the automated assembly of printed circuit boards. Given aren jobs, which have to be performed on a single machine within a fixed... The component retrieval problem in printed circuit board assembly ; ; ; in International Journal of Flexible Manufacturing Systems (1996), 8 The minimization of the makespan of a printed circuit board assembly process is a complex problem. Decisions involved in this problem concern the specification of the order in which components are to ... Valid inequalities and facets for a hypergraph model of the nonlinear knapsack and FMS part-selection problems ; in Annals of Operations Research (1995), 58 This paper defines the dense subhypergraph problem (DSP), which provides a modelling framework for the nonlinear knapsack problem and other well-known problems arising in areas such as capital budgeti... Complexity of product positioning and ball intersection problems ; ; in Mathematics of Operations Research (1995), 20 The product positioning problem consists in choosing the attributes of a new product in such a way as to maximize its market share, i.e., to attract a maximum number of customers. Mathematically, the ... Quantitative-analysis of the courtship and mating-behavior in the loggerhead musk turtle Sternotherus-Minor (Reptilia, Kinosternidae) with comments on courtship behavior in turtles ; in Copeia (1994), 1994(3), 676-684 Courtship behaviors of 15 Sternotherus minor (seven males and eight females) were video recorded. Males perform nine motor patterns [approach, cloacal and bridge sniffing, turning (anterior and poster... A column generation approach to job grouping for flexible manufacturing systems ; in European Journal of Operational Research (1994), 78 A flexible manufacturing system consists of a number of NC-machines, linked by automated material handling devices, that perform the various operations required to manufacture parts. Each operation re... On the strength of relaxations of multidimensional knapsack problems ; in INFOR (1994), 32 Branch-and-bound algorithms for integer programming problems typically employ bounds derived from well-known relaxations, such as the Lagrangian, surrogate, or composite relaxations. Although the boun... Approximation algorithms for integer covering problems via greedy column generation ; in RAIRO : Operations Research = Recherche Opérationnelle (1994), 28 Many combinatorial optimization problems can be formulated as covering problems. In some cases, this covering formulation is not polynomial in the input size of the original problem. In order to solve... Surface pressure in SOS models ; ; in Thin Solid Films (1994), 244 Microscopic models of the solid-on-solid type were considered to describe the surface pressure of monolayers and bilayers on top of another layer in two and three dimensions. The two interfaces, above... Approximation algorithms for multi-dimensional assignment problems with decomposable costs ; ; in Discrete Applied Mathematics (1994), 49 The k-dimensional assignment problem with decomposable costs is formulated as follows. Given is a complete k-partite graph G = (X_0 U ... U X_{k-1}, E), with lX_il = p for each i, and a nonnegative le... A complexity index for satisfiability problems ; ; ; in SIAM Journal on Computing (1994), 23 This paper associates a linear programming problem (LP) to any conjunctive normal form p, and shows that the optimum value Z(p) of this LP measures the complexity of the corresponding SAT (Boolean sat... Minimizing the number of tool switches on a flexible machine ; ; ; in International Journal of Flexible Manufacturing Systems (1994), 6 This article analyzes a tool switching problem arising in certain flexible manufacturing environments. A batch of jobs have to be successively processed on a single flexible machine. Each job requires... Concave extensions for nonlinear 0-1 maximization problems in Mathematical Programming (1993), 61 A well-known linearization technique for nonlinear 0-1 maximization problems can be viewed as extending any polynomial in 0-1 variables to a concave function defined on [0, 1]. Some properties of this... Approximation algorithms for three-dimensional assignment problems with triangle inequalities ; in European Journal of Operational Research (1992), 60 The three-dimensional assignment problem (3DA) is defined as follows. Given are three disjoint n-sets of points, and nonnegative costs associated with every triangle consisting of exactly one point fr... A decomposition of strongly unimodular matrices into incidence matrices of digraphs, ; ; in Discrete Mathematics (1992), 102 A new decomposition of strongly unimodular matrices is given.... Chvátal cuts and odd cycle inequalities in quadratic 0-1 optimization ; ; in SIAM Journal on Discrete Mathematics (1992), 5 In this paper a new lower bound for unconstrained quadratic 0-1 minimization is investigated. It is shown that this bound can be computed by solving a linear programming problem of polynomial size in ... Detection of spurious states of neural networks ; ; in IEEE Transactions on Neural Networks (1991), 2 The authors study the complexity and propose an algorithm for the problem of determining, given p vectors of {-1,1}^n, all linear combinations of them which are also in {-1,1}^n. Computational results... The basic algorithm for pseudo-Boolean programming revisited ; ; in Discrete Applied Mathematics (1990), 29 The basic algorithm of pseudo-Boolean programming due to Hammer and Rudeanu allows to minimize nonlinear 0–1 functions by recursively eliminating one variable at each iteration. We show it has linea... Polynomial-time inference of all valid implications for Horn and related formulae ; ; in Annals of Mathematics & Artificial Intelligence (1990), 1 This paper investigates the complexity of a general inference problem: given a propositional formula in conjunctive normal form, find all prime implications of the formula. Here, a prime implication m... Packing, covering and partitioning problems with strongly unimodular constraint matrices ; ; in Mathematics of Operations Research (1990), 15 A 0-1 matrix A is called strongly unimodular if all its nonsingular square submatrices are triangular. We present an efficient algorithm for linear programming problems in binary variables, when all c... Upper-bounds for quadratic 0-1 maximization ; ; in Operations Research Letters (1990), 9 In this paper, three different approaches are generalised to obtain upper bounds for the maximum of a quadratic pseudo-Boolean function f over [0,1]^n. The original approaches (complementation, majori... More characterizations of triangulated graphs ; ; ; ; in Journal of Graph Theory (1990), 14(4), 413-422 New characterizations of triangulated and cotriangulated graphs are presented. Cotriangulated graphs form a natural subclass of the class of strongly perfect graphs, and they are also characterized in... Throughput rate optimization in the automated assembly of printed circuit boards ; ; ; in Annals of Operations Research (1990), 26 The electronics industry relies heavily on numerically controlled machines for the placement of electronic components on the surface of printed circuit boards (PCB). This paper proposes a heuristic hi... Recognition problems for special classes of polynomials in 0-1 variables in Mathematical Programming (1989), 44 This paper investigates the complexity of various recognition problems for pseudo-Boolean functions (i.e., real-valued functions defined on the unit hypercube B^n = {0,1}^n), when such functions are r... Bimatroidal independence systems ; in Zeitschrift für operations research (1989), 33 An independence system Σ=(X, F) is called bimatroidal if there exist two matroids M=(X,FM) and N=(X,FN) such that F=FM∪FN. When this is the case, {M,N} is called a bimatroidal decomposition of Σ. ... Cause-effect relationships and partially defined Boolean functions ; in Annals of Operations Research (1988), 16 This paper investigates the use of Boolean techniques in a systematic study of cause-effect relationships. The model uses partially defined Boolean functions. Procedures are provided to extrapolate fr... Dualization of regular boolean functions in Discrete Applied Mathematics (1987), 16 A monotonic Boolean function is regular if its variables are naturally ordered by decreasing ‘strength’, so that shifting to the right the non-zero entries of any binary false point always yields ... Product form parametric representation of the solutions to a quadratic boolean equation ; ; ; in RAIRO : Operations Research = Recherche Opérationnelle (1987), 21 A parametric représentation of the solutions to a consistent quadratic boolean equation in n variables is obtained. Each variable (or its complement) is expressed as a product of free boolean paramet... Strong unimodularity for matrices and hypergraphs ; ; in Discrete Applied Mathematics (1986), 15 A 0–1 matrix A is called strongly unimodular if all the bases of (A, I) are triangular. We develop equivalent conditions for strong unimodularity, first in algebraic, then in graph theoretic terms. ... Structural decomposition of multipliers in input-output or social accounting matrix analysis ; ; in Economie Appliquée (1984), 37 Transmission and distribution of wealth with a variable number of children ; in Economics Letters (1982), 10(1-2), 193-196 Models of wealth transmission often express the wealth of a given generation as that of the previous generation multiplied by some random terms. These account for the variability of capital returns, e... Papers - Books - Working Papers - Conferences ## Books and chapters of books Optimisation des transports : de la mer à la terre in Lihoussou, Messan; Steck, Benjamin (Eds.) Moderniser les ports ouest-africains (2018) Operations research (OR) is a quantitative approach that uses advanced analytical methods to help managers make better decisions. The application of its techniques to freight transport and supply chai... Natural Language Processing and Information Systems ; ; ; Book published by Springer (2017) Rail-road terminals location with interconnected rail network of West African countries ; in Cools, Mario; Limbourg, Sabine (Eds.) Proceedings of the BIVEC-GIBET Transport Research Days 2017: Towards an Autonomous and Interconnected Transport Future (2017) From 2006 to 2012, the port of Cotonou improves its performance thanks to the Millennium Challenge Account program, through modernization of port facilities and management systems. But the project not... Inventory routings problems for the management of Returnable Transportation Items with durability constraints ; in Cools, Mario; Limbourg, Sabine (Eds.) Proceedings of the BIVEC-GIBET Transport Research Days 2017: Towards an Autonomous and Interconnected Transport Future (2017) RTIs managements are quite diverse. Research efforts are thus needed in the areas of RTI acquisition; warehouse layout, inventory routing problem; production planning and control; tracking and schedul... Building an Effective Strategy To Supply High Frequency Stores in Emerging Cities ; ; in Cools, Mario; Limbourg, Sabine (Eds.) Proceedings of the BIVEC-GIBET Transport Research Days 2017: Towards an Autonomous and Interconnected Transport Future (2017) Traditional distribution channels that cover nanostores still abound in merging megacities. These traditional retail formats need to be visited and supplied very frequently (High Frequency Stores) whi... The Fleet Size and Mix Vehicle Routing Problem with sequence-based pallet loading and axle weight constraints ; ; ; ; in Cools, Mario; Limbourg, Sabine (Eds.) Proceedings of the BIVEC-GIBET Transport Research Days 2017: Towards an Autonomous and Interconnected Transport Future (2017) In this paper, the Fleet Size and Mix Vehicle Routing Problem (FSM) with sequence-based pallet loading and axle weight constraints is introduced. The effect of the integration of axle weight constrain... De nouveaux terminaux à conteneurs en Belgique : hasard ou nécessité ? ; in Reflets et perspectives de la vie économique (2017) En parodiant le titre d’un célèbre essai de Jacques Monod (1971), cet article tente de synthétiser un certain nombre de travaux de recherche qui, ces dernières années, ont examiné la pertinenc... Integer Programming and Combinatorial Optimization ; Book published by Springer (2016) PDIRPTW Instances in Iassinovskaia, Galina; Limbourg, Sabine; Riane, Fouad (Eds.) The inventory-routing problem of returnable transport items with time windows and simultaneous pickup and delivery in closed-loop supply chains (2016) Instances... Parametric Polyhedra with at least k Lattice Points: Their Semigroup Structure and the k-Frobenius Problem ; ; in Beveridge, Andrew; Griggs, Jerold; Hogben, Leslie; Musiker, Gregg; Tetali, Prasad (Eds.) Recent trends in Combinatorics (2016) The well-studied semigroup Sg(A) = {b : b = Ax; x in Z^n; x >= 0} can be stratified by the sizes of the polyhedral fibers IPA(b) = {x : Ax = b; x >= 0; x in Z^n}. The key theme of this paper is ... Proceedings of the 12th Workshop on Models and Algorithms for Planning and Scheduling Problems ; ; ; ; ; Book published by KU Leuven (2015) This volume contains abstracts of talks presented at the 12th Workshop on Models and Algorithms for Planning and Scheduling Problems (MAPSP 2015), held from June 8 to June 12, 2015, in La Roche-en-Ard... Characteristics of Economically Designed CUSUM and \bar{X} Control Charts ; ; ; ; in Knoth, Sven; Schmid, Wolfgang (Eds.) Frontiers in Statistical Quality Control 11 (2015) In this paper we investigate the characteristics of economic control chart designs for both Shewhart (¯X ) and CUSUM control charts. Authors in the past have made some suggestions regarding the desig... Special Issue on Natural Language Processing and Text Analytics in Industry ; ; ; ; Book published by Elsevier Science (2014) Optimally Locating Facilities with Variable Characteristics ; ; Book published by LAP Lambert Academic Publishing (2012) The main focus of this study is on competitive facility location problems which constitute a special family of facility location problems. In such a problem, a firm or franchise is concerned with inst... Natural Language Processing and Information Systems ; ; ; Book published by Springer (2012) Estimation of a general parametric location in censored regression ; in Exploring research frontiers in contemporary statistics and econometrics - A Festschrift for Léopold Simar (2012) Automatic Cargo Load Planning: Special shipments ; in Cornelis, Eric (Ed.) Proceedings of the BIVEC-GIBET Transport Research Day 2011 (2011) The aircraft loading problem is a real-world combinatorial optimisation problem highly constrained. Indeed, loading the aircraft so the gross weight is less than the maximum allowable is not enough. T... Boolean Functions: Theory, Algorithms, and Applications ; Book published by Cambridge University Press (2011) This monograph provides the first comprehensive presentation of the theoretical, algorithmic and applied aspects of Boolean functions, i.e., {0,1}-valued functions of a finite number of {0,1}-valued v... Modèles mathématiques en gestion ; ; ; Book published by Cassini et POLE (2011) Mis au point notamment pour la gestion de très grands projets industriels, les modèles mathématiques se sont imposés à tous les niveaux de l’activité économique : production, distribution et ... Lift-and-project inequalities in Wiley Encylopedia of Operations Research and Management Science (2011) The lift-and-project technique is a systematic way to generate valid inequalities for a mixed binary program. The technique is interesting both on the theoretical and on the practical point of view. O... Modèles de localisations optimales de hubs de conteneurs sur un réseau multimodal européen in Lebacque, Jean-Patrick; Aron, Maurice; Farhi, Nadir (Eds.) Modélisation des réseaux de transport (2011) Le monde des transports et de la mobilité requiert une restructuration vu la croissance des échanges. Transférer une partie du trafic de marchandises de la route vers des modes de transports plus r... The Mathematics of Peter L. Hammer (1936-2006): Graphs, Optimization, and Boolean Models ; ; ; ; in Boros, Endre; Crama, Yves; De Werra, Dominique; Hansen, Pierre; Maffray, Frédéric; Simeone, Bruno (Eds.) The Mathematics of Peter L. Hammer (1936-2006): Graphs, Optimization, and Boolean Models (2011) This volume of the Annals of Operations Research, contains a collection of papers published in memory of Peter L. Hammer. As we recall further down, Peter made substantial contributions to several are... Boolean Models and Methods in Mathematics, Computer Science, and Engineering ; Book published by Cambridge University Press (2010) This collection of papers proposes in-depth presentations of a variety of advanced topics related to Boolean functions and expressions. The chapters are written by some of the most prominent experts i... Alternative to the Mean-Variance Asset Allocation Analysis: A Scenario Methodology for Portfolio Selection ; ; in Gregoriou, Greg N. (Ed.) Stock Market Volatility (2009) This paper introduces a new methodology to optimize the allocation of financial assets. The objective of the model is to maximize the expected return of the portfolio under constraints limiting its Va... Nonparametric Mean Preservation in Censored Regression Book published by VDM Verlag (2009) The aim of this book is to estimate the conditional mean of some functions depending on the response variable Y (moments, distributions...) in regression models where this response is possibly censore... Modèles et données dans l’univers économique ; in Justens, Daniel (Ed.) Attentes d'un modèle (2008) Dans cette note, nous émettons quelques réflexions relatives à la modélisation scientifique, en insistant sur la spécificité de l'exploitation de modèles dans les sciences humaines, en particul... The determinants of CDS prices: an industry-based investigation ; ; in Wagner, Niklas (Ed.) Credit Risk: Models, Derivatives and Management. Empirical Studies and Analysis. Financial Mathematics Series. (2008) Inter-modal freight terminal location in Europe : a strategic model ; in Proceedings of the BIVEC-GIBET, Transport Research Day 2007 (2007) The political pressure in favour of multi- and inter-modal transport has oriented the focus on sustainable transport solutions. Inter-modal transport is one of the possible solutions, but its efficien... Parametric conditional mean and variance testing with censored data ; ; in H. Skiadas, Christos (Ed.) Recent Advances in Applied Stochastic Models and Data Analysis. (2007) Corporate control concentration measurement and firm performance ; ; ; in Batten, J.A.; Fetherston, T.A. (Eds.) Social Responsibility: Corporate Governance Issues (2003) Traditionally share price returns and their variance have been explained by factors linked to the operations of the company such as systematic risk, corporate size and P/E ratios or by factors related... Visualizing Statistical Models and Concepts ; Book published by Marcel Dekker, Inc (2002) This text/reference examines classic algorithms, geometric diagrams, and mechanical principles for enhanced visualization of statistical estimation procedurs and mathematical concepts in physics, engi... Pseudo-Boolean optimization ; in Resende, M.G.C.; Pardalos, P.M. (Eds.) Handbook of Applied Optimization (2002) This article briefly surveys some fundamental results regarding pseudo-Boolean functions.... Théorie stochastique de la décision d'investissement ; Book published by De Boeck & Larcier (1997) La complexité, l'imprévisibilité croissantes de l'environnement et de la structure interne des entreprises contraignent le gestionnaire à tendre vers une description probabiliste de l'univers. Le ... Robotic flowshop scheduling is strongly NP-complete ; in Klein Haneveld, W.K.; Vrieze, O.J.; Kallenberg, L.C.M. (Eds.) Ten Years LNMB (1997) We consider a robotic flowshop model in which a single robot is responsible for the transportation of parts between machines and the amount of time that a part spends on a machine must be comprised in... Production Planning in Automated Manufacturing ; ; Book published by Springer Science & Business Media B.V. - Second, revised and enlarged edition. (First edition: 1994) (1996) Local search in combinatorial optimization ; ; in Braspenning, P.J.; Thuijsman, F.; Weijters, A.J.M.M. (Eds.) Artificial Neural Networks : An Introduction to ANN Theory and Practice (1995) Production Planning in Automated Manufacturing ; ; Book published by Springer-Verlag - First edition. (Second, revised and enlarged edition: 1996) (1994) Recognition of quadratic graphs and adjoints of bidirected graphs ; in Bloom, G.S.; Graham, R.L.; Malkevitch, J. (Eds.) Combinatorial Mathematics : Proceedings of the Third International Conference (1989) A characterization of a cone of pseudo-Boolean functions via supermodularity-type inequalities ; ; in Kall, P.; Kohlas, J.; Popp, W.; Zehnder, C.A. (Eds.) Quantitative Methoden in den Wirtschaftswissenschaften (1989) A pseudo-Boolean function is a real valued function defined on the vertices of the unit n-dimensional hypercube. It has a unique expression as a multilinear polynomial in n variables. It is called alm... Papers - Books - Working Papers - Conferences ## Working papers, reports, thesis Variable selection in proportional hazards cure model with time-varying covariates, application to US bank failures ; E-print/Working paper (in press) From a survival analysis perspective, since defaults are rare events, bank failures data often exhibit heavy censoring rate. This empirical evidence can be explained by the existence of a subpopulatio... Robust Multivariate Dispersion Measures Doctoral thesis (2018) A comparative study of labeling algorithms for vehicle routing problems with time windows and waiting time costs ; ; E-print/Working paper (2017) Testing revealed preference: An algorithmic outlook ; ; E-print/Working paper (2017) Revealed preference theory is a domain within economics that studies rationalizability of behavior by (certain types of) utility functions. Given observed behavior in the form of choice data, testing ... Design and Management of Freight Transport Networks: Intermodal Transport and Externalities Doctoral thesis (2017) Transportation of goods contributes to the economic development of societies but it generates negative impacts on its environment called negative externalities. In its White Paper on Transport, the Eu... Résultats des enquêtes "Attrait des Sciences" (années académiques 2015–2016 et 2016–2017) ; Report (2017) Lors des rentrées académiques 2015-2016 et 2016-2017, une enquête a été envoyée aux étudiants primants inscrits en Faculté des Sciences. Cette enquête interroge les étudiants sur leur parcou... Multi-period vehicle allocation with uncertain transportation requests ; E-print/Working paper (2017) This work investigates optimization techniques for a multi-period vehicle allocation problem with uncertain requests. A company owning a limited fleet of trucks attempts to maximize its operational pr... Adaptive large neighborhood search for multi-trip vehicle routing with time windows ; ; E-print/Working paper (2017) We consider a multi-trip vehicle routing problem with time windows (MTVRPTW), in which each vehicle can perform several trips during its working shift. This problem is especially relevant in the conte... Understanding the Economic Determinants of the Severity of Operational Losses: A regularized Generalized Pareto Regression Approach ; ; E-print/Working paper (2017) We investigate a novel database of 10,217 extreme operational losses from the Italian bank UniCredit, covering a period of 10 years and 7 different event types. Our goal is to shed light on the depend... The three-dimensional rectangular Multiple Bin Size Bin Packing Problem with transportation constraints: A case study in the field of air transportation Doctoral thesis (2017) According to the International Air Transport Association and Air Transport Action Group, 51.3 million metric tons of goods were transported by airlines in 2014. To transport luggage, freight and mail,... Berge-acyclic multilinear 0-1 optimization problems ; ; E-print/Working paper (2016) Inventory routing for perishable products Doctoral thesis (2016) We explore three problems in this thesis and develop solution methods for each problem. First, an inventory routing problem for a perishable product with stochastic demands is considered and different... LARCH: A package for estimating multinomial, nested, and cross-nested logit models that account for semi-aggregate data ; ; E-print/Working paper (2016) We present a summary of important computational issues and opportunities that arise from the use of semi-aggregate data (where the explanatory data for choice scenarios are not necessarily unique for ... The np- Control Charts with the Guaranteed In-Control Performance ; E-print/Working paper (2016) In this paper, we evaluate the in-control performance of np-control charts with estimated parameters. We then apply the bootstrap method to adjust the control charts’ limits to guarantee the desired... Early Detection of University Students in Potential Difficulty ; E-print/Working paper (2016) Using data mining methods, this paper presents a new means of identifying freshmen's profiles likely to face major difficulties to complete their first academic year. Academic failure is a relevant is... Modeling in Air Transportation: Cargo Loading and Itinerary Choice Doctoral thesis (2016) We examine two problems as part of this dissertation. The first is a cargo loading problem. The aim is to load a set of containers and pallets into a cargo aircraft that serves multiple airports. Our ... A Comparison of Departure Time of Day Formulations ; ; ; ; E-print/Working paper (2016) Airline passengers’ itinerary choices are influenced by many factors including carriers, prices, the number of connections, and departure times. This paper compares three different methods that have... Continuous Departure Time of Day Preferences for Continental U.S. Airline Markets Segmented by Distance, Direction of Travel, Number of Time Zones, Day of Week and Itinerary Type ; ; ; ; E-print/Working paper (2016) Airlines use itinerary choice models to allocate the total number of passengers in a city pair to specific itineraries. In a related paper, we estimated a multinomial logit (MNL) itinerary choice mode... Nonparametric control charts: economic statistical design ; ; E-print/Working paper (2016) This paper studies economic statistical designs (ESD) for nonparametric control charts based on the sign and Wilcoxon tests. The main advantage of the procedures is that, except for the tested locatio... Online Learning for Strong Branching Approximation in Branch-and-Bound ; ; E-print/Working paper (2016) We present an online learning approach to variable branching in branch-and-bound for mixed-integer linear problems. Our approach consists in learning strong branching scores in an online fashion and i... Feasibility-oriented Branching Strategies for Global Optimization ; ; E-print/Working paper (2016) We study the spatial Brand-and-Bound algorithm for the global optimization of nonlinear problems. In particular we are interested in a method to find quickly good feasible solutions. Most spatial Bran... Large neighborhood search for multi-trip vehicle routing ; ; ; E-print/Working paper (2015) We consider two large neighborhood search approaches for the multi-trip vehicle routing problem, where each vehicle can perform several routes during the working shift to serve a set of customers. The... Nonparametric and bootstrap techniques applied to financial risk modeling Doctoral thesis (2015) For the purpose of quantifying financial risks, risk managers need to model the behavior of financial variables. However, the construction of such mathematical models is a difficult task that requires... Testing Theories of Choice Behaviour Doctoral thesis (2015) Doc'Data: mesure de la persévérance au doctorat à l'Université de Liège ; ; Report (2015) Le Conseil du Doctorat a parmi ses missions celle d’accompagner les doctorants dans leur parcours et de mettre en place des actions en vue de favoriser la réussite. Cependant, pour réellement mesu... A semiparametric model for Generalized Pareto regression based on a dimension reduction assumption ; ; E-print/Working paper (2015) In this paper, we consider a regression model in which the tail of the conditional distribution of the response can be approximated by a Generalized Pareto distribution. Our model is based on a semipa... A branch-and-price algorithm for 2-period vehicle routing problems ; ; E-print/Working paper (2015) We consider a Vehicle Routing Problem (VRP) with deterministic orders in two periods from a set of stores. Orders in period 1 (2) can be postponed (advanced) to the other period but any diversion from... Machine Learning to Balance the Load in Parallel Branch-and-Bound ; ; E-print/Working paper (2015) We describe in this paper a new approach to parallelize branch-and-bound on a certain number of processors. We propose to split the optimization of the original problem into the optimization of severa... A NLP-MILP iterating algorithm for operational planning in electrical distribution systems ; ; E-print/Working paper (2015) We consider a class of optimal power flow (OPF) applications where some loads offer a modulation service in exchange for an activation fee. These applications can be modeled as multi-period formulatio... Multi-period Stochastic Optimization Problems in Transportation Management Doctoral thesis (2014) The topic of this thesis in management science is to propose a methodology to tackle multi-period decision problems including stochastic forecasts and to apply it to the field of transportation manage... Estimating the out-of-sample predictive ability of trading rules: a robust bootstrap approach ; E-print/Working paper (2014) In this paper, we estimate the out-of-sample predictive ability of a set of trading rules. Usually, this ability is estimated using a rolling-window sample-splitting scheme, true out-of-sample data be... Short Prime Quadratizations of Cubic Negative Monomials ; E-print/Working paper (2014) Pseudo-Boolean functions naturally model problems in a number of different areas such as computer science, statistics, economics, operations research or computer vision, among others. Pseudo-Boolean o... Optimization of the service start time for an elementary shortest path problem with time windows ; ; E-print/Working paper (2014) We investigate an elementary shortest path problem with resource constraints where a single capacitated vehicle, initially located at a depot, must serve a set of customers while respecting their indi... A new methodological approach for error distributions selection in Finance ; E-print/Working paper (2014) In this article, we propose a robust methodology to select the most appropriate error distribution candidate, in a classical multiplicative heteroscedastic model. In a first step, unlike to the tradit... Estimation of the error distribution in nonparametric regression with cross-sectional data ; E-print/Working paper (2014) In this article, we study the nonparametric regression model Y=m(X)+varepsilon where m(x)=E[Y|X=x] and sigma²(x)=Var[varepsilon|X=x] are unknown smooth functions, and the error varepsilon has zero me... Parametric conditional variance estimation in location-scale models with censored data ; E-print/Working paper (2014) Suppose the random vector (X,Y) satisfies the regression model Y=m(X)+sigma(X)*varepsilon, where m(.)=E(Y|.), sigma²(.)=Var(Y|.) belongs to some parametric class {sigma _theta(.): theta in Theta} and... Nonparametric regression with cross-sectional data: an alternative to conditional product-limit estimators ; E-print/Working paper (2014) Suppose the random vector (X,Y) satisfies the nonparametric regression model Y=m(X)+varepsilon, where m(x)=E[Y|X=x] and sigma²(x)=Var[varepsilon|X=x] are unknown smooth functions and the error vareps... A Supervised Machine Learning Approach to Variable Branching in Branch-And-Bound ; ; E-print/Working paper (2014) We present in this paper a new approach that uses supervised machine learning techniques to improve the performances of optimization algorithms in the context of mixed-integer programming (MIP). We fo... On the importance of Quality, Liquidity Level and Liquidity Risk: A Markov-Switching Regime Approach ; ; E-print/Working paper (2014) From censored to cross-sectional data: non and semiparametric new developments Doctoral thesis (2014) In many statistical studies, an observation is evident: the available data are regularly right-censored. A censorship arises when, for different reasons, the data time of interest can not be observed.... Approximation Algorithms for Multi-Dimensional Vector Assignment Problems ; ; E-print/Working paper (2013) We consider a special class of axial multi-dimensional assignment problems called multi-dimensional vector assignment (MVA) problems. An instance of the MVA problem is defined by$m$disjoint sets, ea... Dynamic accelerated failure time model with endogeneity and heterogeneity: a control function appoach ; E-print/Working paper (2013) Estimation from cross-sectional data under a semiparametric truncation model ; ; E-print/Working paper (2013) Cross-sectional sampling is often used when investigating inter-event times, resulting in left-truncated and right-censored data. In this paper we consider a semiparametric truncation model in which t... R&D, Capital Structure, and Agency Conflict: A Contingent Claim Analysis E-print/Working paper (2013) Conditional asset allocation: Does Market-Wide Liquidity Matter? ; ; E-print/Working paper (2012) This paper investigates the effect of market-wide liquidity on optimal portfolio allocations across US equity portfolios sorted by size and book-to-market characteristics. In particular, we consider a... La vie boursière du premier fond de placement en Europe : Robeco, 1933-2010. Master's dissertation (2012) Si les fonds communs de placement sont devenus au fil des ans un choix populaire chez les investisseurs qui sont désormais prêts à investir dans des actifs différents avec un seul véhicule d'inve... How to optimally load a set of containers into an aircraft ; ; E-print/Working paper (2012) A capacity game in transportation management ; E-print/Working paper (2012) Min max generalization for two-stage deterministic batch mode reinforcement learning: relaxation schemes ; ; ; Report (2012) Optimization Methods for the design and production of Naval Structures Doctoral thesis (2011) In the past decades the marine industry has undergone significant evolution and the production of large passenger ships faced dramatic changes. The size, the complexity and the security standards of t... Modélisation d'évènements rares à l'aide de distributions non normales : application en finance avec la fonction sinh-arcsinh Master's dissertation (2011) In 2008, the financial crisis put forward the relative inaccuracy of the market risk forecasting models in the financial industry. In particular, extreme events were shown to be regularly underestimat... Optimally Locating Facilities with Variable Characteristics Doctoral thesis (2011) Facility location problems aim at optimally locating facilities like plants, warehouses, convenience stores, shopping malls etc. They can have different objectives such as maximizing the profit gained... Likelihood based inference for semi-competing risks ; ; ; E-print/Working paper (2011) Estimating the residual distribution in a semiparametric transformation model. ; ; E-print/Working paper (2011) Estimation of the error density in a semi-parametric transformation model. ; ; E-print/Working paper (2011) Robust maximum weighted independent-set problems on interval graphs ; Report (2011) We study the maximum weighted independent-set problem on interval graphs with uncertainty on the vertex weights. We use the absolute robustness criterion and the min-max regret criterion to evaluate s... PROJECT SCHEDULING WITH MODULAR PROJECT COMPLETION ON A BOTTLENECK RESOURCE ; ; ; Report (2011) In this paper, we model a research-and-development project as consisting of several modules, with each module containing one or more activities. We examine how to schedule the activities of such a pro... Critical analysis of the WORLDNET freight flow matrices ; E-print/Working paper (2010) The growing trade between Europe and the rest of the world and the enlargement of the European Union has led the European Commission’s Directorate-General for Energy and Transport to fund Worldnet ... A Meta Model to Optimal Design the VSI T2 Chart ; ; Report (2010) RAPPORT DE RECHERCHE SUR UNE APPLICATION DE GESTION DE LA COLLABORATION DU SERVICE EXPÉDITION DU CHARGEUR AVEC LE TRANSPORTEUR ; ; ; ; ; ; ; ; Report (2009) Dans ce rapport, les échanges d'information d'un donneur d'ordre, d'un transporteur et d'un fournisseur au sein d'une chaîne de distribution sont analysés. Les possibilités de tracking et de traci... Local search heuristics for large-scale discrete structural optimization with expensive black-box evaluations ; ; Report (2009) This paper considers large-scale structural optimization problems featuring discrete variables, as well as nonlinear implicit constraints which can only be evaluated through time-expensive computation... RAPPORT INTERNE : REVUE DE LITTERATURE SUR LA GESTION DES RESSOURCES RÉUTILISABLES ET DES MÉTHODES D’OPTIMISATION ; ; ; ; ; Report (2009) Dans cette revue de la littérature scientifique, on peut trouver une synthèse des thématiques liées aux modèles et aux techniques d'optimisation utilés pour la gestion de ressources réutilisabl... RAPPORT DE RECHERCHE SUR L’OPTIMISATION DU ROUTAGE ET DU CHARGEMENT DE VEHICULES. ; ; ; ; ; Report (2009) Dans ce rapport confidentiel, un algorithme d'optimisation du chargement de véhicules a été mis au point dans le cadre d'une application avec un partenaire industriel.... A Markov chain model of power indices in corporate structures ; ; E-print/Working paper (2009) This paper proposes to use a game-theoretic framework in analyzing complex corporate networks, notably in measuring the amount of control'' of both direct and indirect shareholders. The values of th... EcoTransHy, Rapport final de conclusions ; ; ; ; ; Report (2008) Politiques d’approvisionnement dans les systèmes à plusieurs fournisseurs et Optimisation des décisions dans les chaînes logistiques décentralisées Doctoral thesis (2008) Coordinating product flows between the partners of a supply chain is a difficult task because of random variations in demand and supply processes and the antagonistic nature of the individual economic... Goodness-of-fit tests for censored regression based on artificial data points ; ; Report (2008) Planification stratégique de Systèmes de transport de marchandises en Europe : Modèles de localisations optimales de hubs de conteneurs sur un réseau multimodal Doctoral thesis (2007) There is a growing imbalance between modes of transport in the European Union. The increasing success of road results in an ever worsening congestion, more environmental nuisances and accidents. That... Cutting planes from two rows of the simplex tableau (extended version) ; ; ; E-print/Working paper (2006) A branch and bound framework applied to naval structure optimization problems Master of advanced studies dissertation (2005) Naval structure optimization consists of defining the optimum scantling of the constitutive elements of a structure with given general dimensions and form of the hull. Amathematical formulation leads ... Grafting Information in Scenario Trees: Application to Option Prices ; ; E-print/Working paper (2005) The high level of sophistication in portfolio management modeling techniques often goes along with very large output sensitivity to parameter choices. As a potential solution to this problem, this pap... Exploring Structure and Reformulations in Different Integer Programming Algorithms Doctoral thesis (2004) In this thesis we consider four topics all related to using problem reformulations in order to solve integer programs, i.e. optimization problems in which the decision variables must be integer. We fi... Analyse de politiques de gestion de stocks au sein d'une chaîne logistique Master's dissertation (2003) Cette étude s'intéresse au problème de gestion de stock d’une entreprise dont le stock est approvisionné par des fournisseurs extérieurs. Les demandes arrivent en suivant un processus de Poisso... Integration of fuzzy optimization and stochastic programming in multi-commodity network flow problems Master's dissertation (2001) This study analyzes the problem of transporting vital commodities and emergency personnel during the response stage of a disaster relief operation by integrating fuzzy linear optimization and stochast... Modelling Financial Data and Portfolio Optimization Problems Doctoral thesis (2001) This doctoral dissertation in management science, entitled “Modelling Financial Data and Portfolio Optimization Problems”, consists of two independent parts, whose unifying theme is the constructi... A discussion of production planning approaches in the process industry ; ; E-print/Working paper (2001) In this paper, we discuss the literature on production planning approaches in the process industry. Our contribution is to underline the differences, as well as the similarities, between issues and mo... Prétraitement de données en reconnaissance de formes par RNA Master's dissertation (1993) Les réseaux de neurones n'ont malheureusement pas que des avantages. Leur taille croît avec la quantité et la complexité des données à traiter. Or le principal inconvénient du RNA est lié à s... The complexity of scheduling short tasks with few starting times ; E-print/Working paper (1992) The following problem is proved to be NP-complete: given n tasks, such that each task has processing time \tau=2, and has no more than k=3 possible starting times, does there exist a feasible schedule... Papers - Books - Working Papers - Conferences ## Conferences Linear and quadratic reformulation techniques for nonlinear 0-1 optimization problems Scientific conference (2018, February 07) Linear and quadratic reformulation techniques for nonlinear 0-1 optimization problems ; Conference (2018, February 01) Variable selection in proportional hazards cure model with time-varying covariates, application to US bank failures ; Conference (2017, December 16) From a survival analysis perspective, bank failures data exhibit heavy censoring rates, but defaults are rare events. This empirical evidence can be explained by the existence of a subpopulation of ba... On conditional dynamic skewness and directional forecast of currency exchange rates Conference (2017, December) This paper studies dynamic skewness and kurtosis specifications for the purpose of directional forecasts of daily exchange rates. To do so, we formulate a GARCH-in-mean model where the innovations fol... Indexing grey multilingual literature in General Practice in the era of Semantic Web ; ; ; ; ; ; ; in The Grey Journal (2017, October 23) Problem/Goal: Sharing the results of research with General Practitioners (GPs) is crucial for the survival of the discipline of General Practice / Family Medicine (GP/FM). The production of abstracts ... NANO-STORE RETAILERS’ DISTRIBUTION SYSTEM MANAGEMENT IN EMERGING COUNTRIES ; ; Scientific conference (2017, October) Emerging megacities are still abounded with traditional distribution channels. These retail formats need to be visited and supplied very frequently, which turns to be costly and time consuming. In thi... Regularized Discriminant Analysis in Presence of Cellwise Contamination ; Conference (2017, August 01) Quadratic and Linear Discriminant Analysis (QDA/LDA) are the most often applied classification rules under normality. In QDA, a separate covariance matrix is estimated for each group. If there are mor... Branch-and-price algorithms for a VRP with time windows and variable departure times ; ; Conference (2017, July 20) A bilevel modelling approach to service network design and pricing: Application to intermodal transportation ; Conference (2017, July 18) Linearization and quadratization techniques for 0-1 optimization problems ; Conference (2017, July 17) A bilevel modelling approach to service network design and pricing: Application to intermodal transportation ; Conference (2017, July 14) A class of valid inequalities for multilinear 0-1 optimization problems ; Conference (2017, July 13) Neighborhood search approaches for a multi-trip vehicle routing problem with time windows ; ; Conference (2017, July 10) We consider a multi-trip vehicle routing problem with time windows where each vehicle can perform several routes to serve the customers. Besides imposing a time window at the depot, we also assume tha... Early detection of university students with potential difficulties ; Conference (2017, July) Using data mining methods, this paper presents a new means of identifying freshmen's profiles likely to face major difficulties to complete their first academic year. We aim at early detection of pote... Is a new definition of intermodal transport interesting for transferring flows from road to more environmentally friendly modes? ; ; Conference (2017, July) Road remains the most used mode in Europe. Even if it is appreciated for its responsiveness, flexibility, and quickness, road transport is however responsible for negative impacts on its environment l... A Markov-switching Generalized additive model for compound Poisson processes, with applications to operational losses models Conference (2017, July) This paper is concerned with modeling the behavior of random sums over time. Such models are particularly useful to describe the dynamics of operational losses, and to correctly estimate tail-related ... A Markov-switching Generalized additive model for compound Poisson processes, with applications to operational losses models Conference (2017, July) This paper is concerned with modeling the behavior of random sums over time. Such models are particularly useful to describe the dynamics of operational losses, and to correctly estimate tail-related ... Optimising workforce and energy costs by exploiting production flexibility ; Conference (2017, July) In a world where the electricity prices become more and more volatile, notably due to renewable energies, the industry is suffering from cost variations never seen before, especially when electro-inte... An integrated logistics decision support model for city logistics Scientific conference (2017, June 28) Today, more than 50% of the world's population lives in cities; the urban population is projected to reach 85% by 2100. Mainly due to urbanization and e-commerce, the demand for urban freight transpor... Cellwise robust regularized discriminant analysis ; Conference (2017, June 02) Quadratic and Linear Discriminant Analysis (QDA/LDA) are the most often applied classiﬁcation rules under normality. In QDA, a separate covariance matrix is estimated for each group. If there are mo... Variable selection in proportional hazards cure model with time-varying covariates, application to bank failures ; Conference (2017, June) In the last three decades, as a consequence of failures and corporate actions, the number of commercial banks in the United States has shrunk by two thirds. Empirical evidence in the analysis of bank ... Intermodal transport: does a wider definition improve its competitiveness? ; ; Conference (2017, June) With the opening of borders and always greater decentralization of production, freight transport increased a lot in the last decades. Road remains the most used mode in Europe (Eurostat, 2016). Even i... Understanding the Economic Determinants of the Severity of Operational Losses: A regularized Generalized Pareto Regression Approach, Conference (2017, June) We investigate a novel database of 10,217 extreme operational losses from the Italian bank UniCredit, covering a period of 10 years and 7 di erent event types. Our goal is to shed light on the depende... Operational assessment of intermodality future in Belgium: Best-case scenario ; in Proceedings of the BIVEC/GIBET Transport Research Days 2017 (2017, May) From the perspective of stimulating intermodal transport as an ecological and economically promising freight transport scheme in the EU, this paper is devoted to assess its future position with respec... Can any possible combination of modes improve intermodal attractiveness? ; ; in Proceedings of the BIVEC-GIBET Transport Research Days 2017 (2017, May) In its White Paper on Transport, the European Commission recognizes intermodal transport as an alternative solution to road transport. In practice, intermodal transport can be constituted by any combi... A terminology in General Practice / Family Medicine to represent non-clinical aspects for various usages ; ; ; ; ; ; ; ; in R. Randell et al. (Ed.) Informatics for Health: Connected Citizen-Led Wellness and Population Health (2017, April 24) Abstract. The hereby proposed terminology called “Q-Codes” can be defined as an extension of the International Classification of Primary Care (ICPC-2). It deals with non-clinical concepts that are... Modelling the industrial flexibility from the electricity consumption and HR points of view ; Conference (2017, April 21) A class of valid inequalities for multilinear 0-1 optimization problems ; Poster (2017, March 21) A class of valid inequalities for multilinear 0-1 optimization problems ; Conference (2017, March 13) A best fit heuristic for the three-dimensional Bin Packing Problem with practical constraints from an air transportation application ; ; in Proceedings of the BIVEC-GIBET Transport Research Days 2017 (2017) This work considers the three-dimensional Multiple Bin Size Bin Packing Problem which consists in packing a set of cuboid boxes into containers of various shapes, while minimising unused space. The ai... Can Autonomous Vehicles Reduce Car Mobility? Evidence from a Stated Adaptation Experiment in Belgium ; ; in Transportation Research Board Annual Meeting. Compendium of Papers (2017) From literature, it is clear that the discussion about the potential benefits and drawbacks of autonomous vehicles is not finished. In order to provide insight into this discussion, this paper investi... A class of valid inequalities for multilinear 0-1 optimization problems ; Conference (2016, December 14) Les problèmes “riches” de tournées de véhicules Conference (2016, November 03) La compétitivité du transport intermodal Conference (2016, November 02) A full inference toolbox to measure multivariate relative dispersion ; Conference (2016, October 14) In the univariate context, coefficients of variation (CV) are widely used to compare the dispersion of a variable in several populations. When the comparison is based on p characteristics however, sid... Robust discriminant analysis based on the joint graphcial lasso estimator ; ; Poster (2016, October) Linear and Quadratic Discriminant Analysis (LDA/QDA) are the most often applied classification rules under the normality assumption. When there is not enough data, the quadratic rule, which requires t... A Bilevel Design and Pricing Model for an Intermodal Service Network ; Scientific conference (2016, September 09) This work addresses the problem of jointly designing and pricing intermodal freight services during a medium-term planning horizon. Given the innate hierarchy in the problem, a bilevel program is cons... Balanced words and related concepts: applications and complexity issues Conference (2016, September 05) In this talk, I present a few results and several questions about "regular" sequences of integers and related concepts, such as balanced words, partitions and covers of the integers by arith... Are your strategic buyer-supplier relationships under control? ; ; Scientific conference (2016, September) Reformulations of nonlinear binary optimization problems Scientific conference (2016, August 17) Operational costs and externalities in optimal intermodal network design ; ; Conference (2016, July 13) Transportation of goods is essential for the economy but also leads to harmful impacts related to human health aspects. Intermodal transport is promoted by Europe to reduce these negative externalitie... Optimal returnable transport items management ; ; Conference (2016, July 11) Reducing environmental impact, related regulations and potential for operational benefits are the main reasons why companies share their returnable transport items (RTIs) among the different partners ... Neighborhood search approaches for multi-trip vehicle routing problems ; ; Conference (2016, July 06) We introduce two large neighborhood search approaches for solving the multi-trip vehicle routing problem (MTVRP), where each vehicle can perform several routes to serve a set of customers. The problem... Column Generation Based Algorithms for a VRP with Time Windows and Variable Departure Times ; ; Conference (2016, July 05) We investigate a solution methodology for a variant of the VRP with time windows. In the examined variant, the departure time of each vehicle from the depot can be determined by the decision-maker, wh... Early detection of university students in potential difficulty ; Conference (2016, July) BRAIN-TRAINS: Scenario development to explore intermodal rail transport expansion in, from and towards Belgium ; ; ; ; ; ; ; ; ; Conference (2016, July) Quadratic reformulations of nonlinear binary optimization problems Conference (2016, July) A {\em pseudo-Boolean function} is a real-valued function$f(x)=f(x_1,x_2,\ldots,x_n)$of$n$binary variables, that is, a mapping from$\{0,1\}^n$to$\mathbf R$. \emph{Nonlinear binary optimization ... Monitoring partnership networks- A graph theory approach ; ; Conference (2016, June 17) Recently, companies are forming strong relationships with their strategic suppliers and customers in order to maximize their profit in the global market. Such a partnership or strategic alliance is ba... A class of valid inequalities for multilinear 0-1 optimization problems ; Poster (2016, June 02) Direct control service from residential heat pump aggregation with specified payback ; ; ; ; ; in Proceedings of the 19th Power Systems Computation Conference (PSCC) (2016, June) This paper addresses the problem of an aggregator controlling residential heat pumps to offer a direct control flexibility service. The service is defined by a 15 minute power modulation, upward or do... Accounting for price endogeneity in airline itinerary choice models Scientific conference (2016, May 26) This study formulates an itinerary choice model that is consistent with those used by industry and corrects for price endogeneity using a control function that uses several types of instrumental varia... La distribution par des véhicules électriques ; Scientific conference (2016, May 25) The objective of vehicle routing problems is to design a set of efficient vehicle routes to provide goods from a depot to a set of customers satisfying specific constraints. Classical variants of thes... Accounting for price endogeneity in airline itinerary choice models ; ; ; ; Conference (2016, May 20) This study formulates an itinerary choice model that is consistent with those used by industry and corrects for price endogeneity using a control function that uses several types of instrumental varia... Modeling operational losses: a conditional Generalized Pareto regression based on a single-index assumption ; ; Scientific conference (2016, March 09) In this paper, we consider a regression model in which the tail of the conditional distribution of the response can be approximated by a Generalized Pareto distribution. Our model is based on a semipa... Modeling operational losses: a conditional Generalized Pareto regression based on a single-index assumption ; ; Scientific conference (2016, February 24) In this paper, we consider a regression model in which the tail of the conditional distribution of the response can be approximated by a Generalized Pareto distribution. Our model is based on a semipa... Recherche à voisinage large pour le problème de tournées de véhicules à voyages multiples ; ; ; Conference (2016, February 10) Predicting Review Helpfulness in Proceedings (2016, February) Tightening linearizations of non-linear binary optimization problems ; Conference (2016, January 28) Combining acceleration techniques for pricing in a VRP with time windows ; ; Conference (2016, January 28) In this study, we investigate a solution methodology for a variant of the VRP with time windows. The cost of each route depends on its overall duration (including waiting times), while the departure t... Service network design and pricing for intermodal freight transport ; Scientific conference (2016) Multivariate coefficients of variation: a full inference toolbox ; Conference (2015, December 13) The univariate coefficient of variation (CV) is a widely used measure to compare the relative dispersion of a variable in several populations. When the comparison is based on$p\$ characteristics howev...

Modeling the dependence between extreme operational losses and economic factors: a conditional semi-parametric Generalized Pareto approach
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Conference (2015, December)

In this paper, we model the severity distribution of operational losses data, condi- tional on some covariates. Indeed, previous studies [Chernobai et al., 2011, Cope et al., 2012, Chavez-Demoulin et ...

Monitoring The quality Loss Performance of Products
;

Conference (2015, November 03)

This paper presents a control chart based on the Taguchi (1986)’s loss function for monitoring the performance of a process and its capability in monetary form. The proposed chart monitors the loss ...

Revealed preference tests of collectively rational consumption behavior

Scientific conference (2015, October 29)

To verify the empirical adequacy of a particular household consumption model, it is important to develop efficient tests did can be applied to real-world data. These tests check whether the observed h...

Conference (2015, October 23)

A pseudo-Boolean function is a real-valued function of 0-1 variables. Every pseudo-Boolean function can be represented by various analytical expressions, e.g., as a polynomial in its variables, or as ...

Brain trains: scenario development to explore intermodal rail transport expansion in, from and towards Belgium
; ; ; ; ; ; ; ; ; ;

Conference (2015, September)

Modelling Agents’ Behavior in the Context of River Floods: An Ant Colony based Approach
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Conference (2015, September)

This paper presents a model for understanding short-term travelers’ behavior in the context of river floods. In several cities, river floods are considerably affecting urban transportation systems. ...

Estimation of Airline Itinerary Choice Models Using Disaggregate Ticket Data
; ; ;

in 55th AGIFORS Annual Proceedings 2015 (2015, August 29)

Airline itinerary choice models support many multi-million dollar decisions, i.e., they are used to evaluate potential route schedules. Classic models suffer from major limitations, most notably they ...

Brain Trains: Intermodal Rail Freight Transport and Hinterland Connections - A Swot Analysis to Assess the Belgian Rail Practice
; ; ; ; ; ; ; ; ; ;

in Proceedings of the IAME Annual Conference 2015 (2015, August)

This paper focuses on transversal research of the role and influences of rail freight transport, as a part of intermodal transport in Belgium. The scope of the research concentrates on port hinterland...

Branch-and-Price Based Matheuristics for a Vehicle Routing Problem with Time Windows and Variable Service Start Time
; ; ;

Conference (2015, July 15)

We investigate a vehicle routing problem with time windows (VRPTW), where the drivers are paid per time unit worked and the starting times of their shifts are to be determined by the decision maker. I...

A general lotsizing problem with uncertain product returns
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Conference (2015, July 15)

We consider a single-stage system that produces a range of final products. The demands of the final products are supposed deterministic over a finite planning horizon. Each unit of demand has to be fu...

Intermodal network design: a mixed-integer nonlinear model for costs and emissions minimization
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Conference (2015, July 15)

Strengthening linear reformulations of pseudo-Boolean optimization problems
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Conference (2015, July 13)

Feasibility-oriented Branching Strategies for Global Optimization
; ;

Conference (2015, July 13)

We study the spatial Brand-and-Bound algorithm for the global optimization of nonlinear problems. In particular we are interested in a method to find quickly good feasible solutions. Most spatial Bran...

Shewhart Control Charts with Guaranteed In-Control Performance
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Conference (2015, July 08)

The in-control performance of the Shewhart X ̅ and S2 control charts with estimated in-control parameters has been evaluated by a number of authors. Results indicate an unrealistically large amount o...

A best fit decreasing algorithm for the three dimensional bin packing problem
; ;

Conference (2015, July)

Bilevel optimization in the context of intermodal pricing: state of art
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in Proceedings of the 18th Euro Working Group on Transportation, EWGT 2015 (2015, July)

With the rising interest to stimulate intermodal transport, determining pricing strategies can be intrinsically challenging. We provide a review on the current state of research in intermodal pricing,...

; ; ;

Conference (2015, July)

On the importance of Quality, Liquidity Level and Liquidity Risk: A Markov Switching Approach
; ;

Conference (2015, June 27)

Linearization and quadratization approaches for non-linear 0-1 optimization
;

Scientific conference (2015, June 23)

A three-mode bi-objective location model under economies of scale for intermodal transport
; ;

Conference (2015, June 14)

Exact and Heuristic Solution Methods for a VRP with Time Windows and Variable Service Start Time
; ; ;

Conference (2015, June 10)

We consider a VRP with time windows in which the total cost of a solu- tion depends on the total duration of the vehicle routes, and the starting time for each vehicle is a decision variable. We first...

;

Conference (2015, June 05)

The objective usually considered in sustainable transportation is to minimize pollution due to emissions, and equivalently energy consumption. Turning to electric mobility, pollution is related to ele...

Monitoring supply chains with multivariate control charts: an economic-statistical design approach
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Scientific conference (2015, June 02)

Multi-period vehicle assignment problem with stochastic transportation order availability
;

Conference (2015, June 01)

This work investigates optimization techniques for a vehicle-load assignment problem. A company owning a limited fleet of vehicles wants to maximize its operational profit over an infinite horizon div...

What are the determinants of the operational losses severity distribution ? A multivariate analysis based on a semiparametric approach.
; ;

Poster (2015, June)

In this paper, we analyse a database of around 41,000 operational losses from the European bank UniCredit. We investigate three kinds of covariates: firm-specific, fi- nancial and macroeconomic covari...

What the heck is Revenue Management
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Scientific conference (2015, May 08)

The airline industry changed dramatically in 1978 when it became deregulated. Operations research analysts played a critical role after deregulation by developing algorithms and decision-support syste...

BRAIN TRAINS: Intermodal rail freight transport and hinterland connections A SWOT analysis to assess the Belgian rail practice
; ; ; ; ; ; ; ; ; ; ;

Scientific conference (2015, May)

This paper focuses on transversal research of the role and influences of rail freight transport, as a part of intermodal transport in Belgium. A SWOT analysis of the current situation is conducted, st...

Functions of binary variables

Conference (2015, April 29)

TSP model for electric vehicle deliveries, considering speed, loading and path slope.
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Conference (2015, April 17)

In the current Transport White Paper, the European Union presents a roadmap for a more competitive and sustainable European transport system. Concerning Urban Freight Transport, responsible for about ...

What is the impact of ticket-level fare information on classic itinerary choice models ?
; ;

Scientific conference (2015, March 25)

I have been invited by Prof. Dr. Catherine Cleophas as an external guest to the "Revenue Management Colloquium" in Aix-la-Chapelle from March 25 to March 26. The aim is to present my own doc...

Several constructive heuristics for the three dimensional Multiple Bin Size Bin Packing Problem with air transportation constraints
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Conference (2015, March)

Exact and Heuristic Solution Methods for a VRP with Time Windows and Variable Service Start Time
; ; ;

Conference (2015, February 05)

We consider a VRP with time windows in which the total cost of a solution depends on the duration of the vehicle routes, and the starting time for each vehicle is a decision variable. We first develop...

A mixed integer nonlinear programming bi-objective model for intermodal network design
; ;

Conference (2015, February 05)

Early detection of university students in potential difficulty
;

Conference (2015, February)

Rate of success in the first year at University in Belgium is very low regarding other foreign universities. The University of Liege, as other Universities, has already taken different initiatives. Bu...

Optimal Assignment of Off-Peak Hours to Lower Curtailments in the Distribution Network
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in Proceedings of the 5th European Innovative Smart Grid Technologies (ISGT) (2015)

We consider a price signal with two settings: off-peak tariff and on-peak tariff. Some loads are connected to specific electricity meters which allow the consumption of power only in off-peak periods....

Estimating the error distribution function of a heteroskedastic nonparametric regression of cure model data
; ;

Conference (2015)

On the Importance of Quality, Liquidity Level and Liquidity Risk: A Markov-Switching Regime Approach
; ;

Conference (2014, December 16)

Identifying the best technical trading rule: a .632 bootstrap approach.
;

Conference (2014, December 07)

In this paper, we estimate the out-of-sample predictive ability of a set of trading rules. Usually, this ability is estimated using a rolling-window sample-splitting scheme, true out-of-sample data be...

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Scientific conference (2014, December 04)

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Conference (2014, November 09)

We address the problem of allocating containers into predefined positions of a carrier, in this case aircraft, under several realistic structural and safety constraints. The originality of our approac...

Early detection of university students in potential difficulty : a case study
;

Conference (2014, November)

Rate of success in the first year at University in Belgium is very low regarding other foreign universities. The University of Liege, as other Universities, has already taken different initiatives. Bu...

Distribution and robustness of a distance-based multivariate coefficient of variation

Poster (2014, November)

When one wants to compare the homogeneity of a characteristic in several popula- tions that have di erent means, the advocated statistic is the univariate coe cient of variation. However, in the multi...

Revealed preference tests of collectively rational consumption behavior

Conference (2014, October 28)

To verify the empirical adequacy of a particular household consumption model, it is important to develop efficient tests that can be applied to real-world data. These tests check whether the observed ...

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in Airline Group of the Intl Federation of Operational Research Soc ( AGIFORS ) (Ed.) 54th AGIFORS Annual Proceedings 2014 (2014, October 19)

The present paper looks into the problem of optimizing the loading of a set of containers and pallets into cargo aircraft serving multiple airports. Due to the pickup and delivery operations occurring...

Robustness and efficiency of multivariate coefficients of variation
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Conference (2014, August 12)

The coefficient of variation is a well-known measure used in many fields to compare the variability of a variable in several populations. However, when the dimension is greater than one, comparing the...

A bi-objective model for intermodal transport
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in ILS 2014 Proceedings (2014, August)

Relaxations for multi-period optimal power flow problems with discrete decision variables
; ; ;

in Proceedings of the 18th Power Systems Computation Conference (PSCC'14) (2014, August)

We consider a class of optimal power flow (OPF) applications where some loads offer a modulation service in exchange for an activation fee. These applications can be modeled as multi-period formulatio...

A quantitative analysis of the effect of flexible loads on reserve markets
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in Proceedings of the 18th Power Systems Computation Conference (PSCC) (2014, August)

We propose and analyze a day-ahead reserve market model that handles bids from flexible loads. This pool market model takes into account the fact that a load modulation in one direction must usually b...

A Bi-Objective Location-Allocation Model for Intermodal Terminals
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Conference (2014, July 18)

Specific Multi-trip Operators for Vehicle Routing Problems
; ; ;

Conference (2014, July 17)

In vehicle routing problems with multiple trips (VRPM), each vehicle is allowed to perform more than one trip during its working period. Classical solution techniques for this problem use existing VRP...

Inventory-routing problem with pickups and deliveries of RTI in closed-loop supply chain
; ;

Conference (2014, July 17)

Reducing environmental impact, related regulations and potential for operational benefits are the main reasons why companies share their Returnable Transport Items (RTIs) among different partners of a...

A General Lotsizing and Scheduling Problem with Stochastic Product Returns
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Conference (2014, July 15)

We consider a multi-product capacitated lotsizing and scheduling problem with sequence-dependent setups and stochastic product returns. The returned products accumulate in an input inventory and can b...

Vehicle routing problems with multiple trips: using specific local search operators
; ; ;

Conference (2014, June 25)

In vehicle routing problems with multiple trips (VRPM), each vehicle is allowed to perform more than one trip during its working period. Classical solution techniques for this problem make use of exis...

Multi-period vehicle assignment with stochastic load availability

Conference (2014, June 23)

This work investigates optimization techniques for a vehicle-load assignment problem. A company owning a limited fleet of vehicles wants to maximize its operational profit over an infinite horizon div...

Service Start Time Optimization in Elementary Shortest Path Problems with Resource Constraints
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Scientific conference (2014, June 12)

Besides their real-life applications, elementary shortest path problems with resource constraints are faced as the pricing sub-problem when more complex problems are solved through column generation a...

The application of the NSGA-II optimization method in designing control charts
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Conference (2014, June 04)

The problem of designing control chart is formulated as a multi-objective optimization problem with the adjusted average time to signal as the statistical objective and the expected cost per hour as t...

Integrating axle weight restrictions in a two-dimensional vehicle routing problem with sequence based loading
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Scientific conference (2014, June)

A mixed integer linear programming model for a two-dimensional capacitated vehicle routing problem (2L-CVRP) with sequence based loading and axle weight restrictions is provided. To the authors’ kno...

On the importance of Quality, Liquidity Level and Liquidity Risk: A Markov-Switching Regime Approach
; ;

Conference (2014, May 23)

A 'price balance statistic' for optimizing pricing strategies: a better estimation of elasticities and cross-elasticities
; ; ;

Conference (2014, May 16)

Demand forecasting, price optimization and capacity controls form three major tools of revenue management. Over the past few decades, each discipline has generated a great deal of research but has typ...

A 'price balance statistic' for optimizing pricing strategies: a better estimation of elasticities and cross-elasticities
; ; ;

Conference (2014, May 15)

Demand forecasting, price optimization and capacity controls form three major tools of revenue management. Over the past few decades, each discipline has generated a great deal of research but has typ...

About almost periodic sequences of integers and related concepts

Scientific conference (2014, May 07)

How to locate intermodal terminals for achieving economic and environmental competitiveness?
;

Conference (2014, April 25)

Europe has a strong commitment to the development of competitive and sustainable transportation. An intermediate objective cited in the “White Paper” is to shift 30% of 300 km and above road freig...

Logistics hub: the case of Liège
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Conference (2014, April 24)

A logistics hub can be defined as a specific area where all the activities relating to transport, logistics and goods distribution are carried out. With its central location in Europe, highly develope...

A new methodological approach for error distributions selection in Finance
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Conference (2014, April)

In this article, we propose a robust methodology to select the most appropriate error distribution candidate, in a classical multiplicative heteroscedastic model. In a first step, unlike to the tradit...

Compact quadratizations of nonlinear binary optimization problems
;

Conference (2014, March 25)

Monitoring Delivery Networks in supply chains

Conference (2014, March 14)

Multi-period vehicle assignment with stochastic load availability

Conference (2014, February 27)

This work investigates optimization techniques for a vehicle-load assignment problem. A company owning a limited fleet of vehicles wants to maximize its operational profit over an infinite horizon div...

An exact bi-directional dynamic programming algorithm for an elementary shortest path problem with variable service start time
; ;

Conference (2014, January 31)

We consider an elementary shortest path problem with resource constraints (ESPPRC), where a capacitated single vehicle serves customers by respecting their associated time windows. The vehicle can sta...

Multi-period vehicle assignment with stochastic load availability

Conference (2014, January 31)

We investigate the following problem, which is faced by major forwarding companies active in road transportation (see [2]). A company owning a limited fl eet of vehicles wants to maximize its operatio...

A relax-and- fix heuristic for the three-dimensional bin-packing model with transportation constraints
; ;

Conference (2014, January 30)

Early detection of university students in potential difficulty
;

Conference (2014, January)

Rate of success in the first year at University in Belgium is very low regarding other foreign universities. The University of Liege, as other Universities, has already taken different initiatives. Bu...

A constructive heuristic for the three dimensional Bin Packing Problem with transportation constraints
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Conference (2014)

The aim of this work is to propose a Relax-And-Fix heuristic to build a good initial solution to the 3D BPP. First, a mathematical formulation has been developed taking into account several types of c...

A relax-and- fix heuristic for the three-dimensional bin-packing model with transportation constraints
; ;

in 11th ESICUP Meeting proceedings (2014)

Climatological influences on inland waterway transport capacity
;

Conference (2014)

Climate change may affect inland waterway transport through disturbances in waterway hydrology: longer periods with strong water swells and drops. To allow fully loaded barges, the water level must be...

Lipschitz robust control from off-policy trajectories
; ; ;

in Proceedings of the 53rd IEEE Conference on Decision and Control (IEEE CDC 2014) (2014)

We study the minmax optimization problem introduced in [Fonteneau et al. (2011), `Towards min max reinforcement learning'', Springer CCIS, vol. 129, pp. 61-77] for computing control policies for batc...

A new methodological approach for error distributions selection
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Conference (2013, December 15)

Since 2008 and its ﬁnancial crisis, an increasing attention has been devoted to the selection of an adequate error distribution in risk models, in particular for Value-at-Risk (VaR) predictions. We ...

A new methodological approach for error distributions selection
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Scientific conference (2013, November)

Since 2008 and its ﬁnancial crisis, an increasing attention has been devoted to the selection of an adequate error distribution in risk models, in particular for Value-at-Risk (VaR) predictions. We ...

An efficient algorithm for the provision of a day-ahead modulation service by a load aggregator
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in Proceedings of the 4th European Innovative Smart Grid Technologies (ISGT) (2013, October)

This article studies a decision making problem faced by an aggregator willing to offer a load modulation service to a Transmission System Operator. This service is contracted one day ahead and consist...

Empty Container Management in the Benelux Waterways
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in Pianic Smart Rivers 213 (2013, September 25)

The scientific contribution of this paper is the development of a model for empty container management in the hinterlands of the ports of Antwerp and Rotterdam. The objective of the proposed model is ...

Characteristics of Economically Designed CUSUM and \bar{X} Control Charts
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Conference (2013, August 22)

In this paper we investigate the characteristics of economic control chart designs for both Shewhart (¯X ) and CUSUM control charts. Authors in the past have made some suggestions regarding the desig...

Dynamic Accelerated Failure Time Model with Endogeneity and Heterogeneity: a Control Function approach
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Conference (2013, August)

We develop a control function method to estimate an Accelerated Failure Time (AFT) model with multiple states, where we account for state dependence, heterogeneity, and endogeneity of covariates. In a...

The Airline Container Loading Problem with Pickup & Delivery and Multi Doors
;

in 53rd AGIFORS Annual Proceedings 2013: Annual Symposium and Study Group Meeting (2013, August)

We address the problem of allocating containers into predefined positions of a carrier, in this case aircraft, under several realistic structural and safety constraints, including the management of se...

Optimization of Stochastic Multi-Period Problems in Transportation

Scientific conference (2013, July 09)

Présentation générale de la méthodologie et des travaux réalisés dans le domaine de l'optimisation de problèmes multi-périodes en transport dans le cadre de la thèse de Th. Pironet...

Double-objective Economic Statistical Design of the Adaptive T2 Control Charts
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Conference (2013, July 09)

Neighborhood Search Approaches for a Vehicle Routing Problem with Multiple Trips and Driver Shifts
; ;

Conference (2013, July 08)

Optimization of Service Start Time for an Elementary Shortest Path Problem
; ;

Conference (2013, July 08)

We are concerned with an elementary shortest path problem with resource constraints (ESPPRC), where there is a capacitated single vehicle at the depot for serving a set of delivery and backhaul custom...

General lotsizing in a closed-loop supply chain with uncertain returns
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Conference (2013, July 03)

We consider a multi-product capacitated lotsizing and scheduling prob- lem with sequence-dependent setups and stochastic product returns. The returned products accumulate in an input inventory and can...

A two-stage stochastic programming model for a comprehensive disaster management problem
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Conference (2013, July 03)

A periodic disaster preparedness model that incorporates mitigation, response, and recovery related decisions is proposed. The objective is to minimize the total cost of relief item transportation and...

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Conference (2013, July 02)

We address the problem of allocating containers into predefined positions of a carrier, in this case aircraft, under several realistic structural and safety constraints. The originality of our approac...

A global optimization method for naval structure op- timization
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Conference (2013, July 01)

The paper proposes a global optimization method for the preliminary structural design of large vessels in shipbuilding industry. We face a combinatorial problem of large size, with constraints modeled...

Quadratic reformulations of nonlinear binary optimization problems

Conference (2013, July 01)

We consider the problem of minimizing a pseudo-Boolean function f(x), i.e., a real-valued function of 0-1 variables. Several authors have recently proposed to reduce this problem to the quadratic case...

An exact formulation for the three-dimensional bin-packing with transportation constraints
; ;

Conference (2013, July)

A branch and price approach for an airport vehicle routing problem

Conference (2013, July)

This project has been initiated by a main European freight airport. The goal is to optimize the aircraft refueling process which relies on a given set of trucks. The underlying process can be defined ...

Scientific conference (2013, June 20)

Stochastic Optimization in Multi-periods problems in Transportation

Scientific conference (2013, June 13)

Conditional Asset Allocation: Does Market Wide liquidity Matter?
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Scientific conference (2013, June)

Determination of activation yields for fusion plasma escaping charged particles diagnostics
; ; ; ;

Conference (2013, June)

Determination of activation yield curves for fusion escaping particle diagnostics
; ; ; ;

Conference (2013, June)

The economic and environmental feasibility of biogas buses in Liege
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in 2013 BIVEC-GIBET Transport Research Days - Proceedings (2013, May 30)

Everyday, many students at the University of Liège have to drive to the Sart-Tilman village to attend their courses. These journeys are responsible for the emission of harmful particles which have ne...

Monitoring distribution networks in supply chains

Conference (2013, May 17)

This paper presents a new control chart for monitoring the post optimality of a designed distribution network in a supply chain. The proposed control chart alarms as soon as neither the location nor t...

An elementary shortest path problem with variable service start time
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Conference (2013, May 02)

We consider an elementary shortest path problem with resource constraints (ESPPRC), where a capacitated single vehicle serves a set of delivery and backhaul customers with a revenue and a time window....

New issues for the Goodness-of-fit test of the error distribution : a comparison between Sinh-arscinh and Generalized Hyperbolic distribution
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Conference (2013, April 30)

In this article, we consider a multiplicative heteroskedastic structure of financial returns and propose a methodology to study the goodness-of-fit of the error distribution. We use non-conventional e...

New issues for the Goodness-of-fit test of the error distribution : a comparison between Sinh-arcsinh and Generalized Hyperbolic distributions
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Conference (2013, April 19)

In this article, we consider a multiplicative heteroskedastic structure of financial returns and propose a methodology to study the goodness-of-fit of the error distribution. We use non-conventional e...

Conditional Asset Allocation: Does Market Wide liquidity Matter?
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Scientific conference (2013, April 17)

Branch-and-price: principles and its application to a 2-period vehicle routing problem

Scientific conference (2013, April 05)

We review branch-and-price as an efficient algorithm to solve integer programming problems with huge number of variables. In particular, we discuss column generation algorithm as the main engine in br...

Branch-and-price: principles and its application to a 2-period vehicle routing problem

Scientific conference (2013, April 05)

We review branch-and-price as an efficient algorithm to solve integer programming problems with huge number of variables. In particular, we discuss column generation algorithm as the main engine in br...

Conference (2013, April)

We consider the problem of minimizing an arbitrary pseudo-Boolean function f(x), that is, a real-valued function of 0-1 variables. In recent years, several authors have proposed to reduce this problem...

Automatic Aircraft Cargo Load Planning with Pick-up and Delivery
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Conference (2013, March 15)

This research aims to develop a new mixed integer linear program to solve the containers assignment problem when pickup and deliveries are considered. Given a pool of ULDs and an aircraft with multipl...

Branch-and-price: principles and its application to a 2-period vehicle routing problem

Scientific conference (2013, March 07)

We review branch-and-price as an efficient algorithm to solve integer programming problems with huge number of variables. In particular, we discuss column generation algorithm as the main engine in br...

Conditional Asset Allocation: Does Market Wide liquidity Matter?
; ;

Scientific conference (2013, March 07)

Elective Course Allocation with numerical preferences
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Conference (2013, February 14)

In Universities, students have to select a specified number of elective courses to be included in their curriculum. Elective courses are a good way to increase students motivation and improve their ac...

An adaptive large neighborhood search for a vehicle routing problem with multiple trips and driver shifts
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Conference (2013, February 13)

This study analyzes a rich vehicle routing problem with multiple trips and driver shifts. The considered problem features are inspired from the practical case of a Belgian distribution company. Along ...

Elementary shortest path problems for a multiple-trip vehicle routing problem
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Conference (2013, February 08)

A general lot-sizing problem in a closed-loop supply chain with returns
;

Conference (2013, February 08)

We consider a stochastic version of the multi-product multi-level capacitated lotsizing and scheduling problem with sequence-dependent setups. A bottler needs to determine its production schedule over...

Conference (2013, February 08)

Two-stage stochastic integer programming models for strategic disaster preparedness
; ;

Conference (2013, February 08)

We are interested in two distinct disaster management models which are modeled by two-stage stochastic integer programming. While the first model solution provides optimal post-disaster response relat...

An adaptive large neighborhood search for a vehicle routing problem with multiple trips and driver shifts
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Conference (2013, February 07)

Optimization model for empty container repositioning
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Scientific conference (2013, February 07)

Empty container management is a transportation issue relating to the imbalance of container demand and supply. This project aims at minimizing the overall cost of empty container management. It takes ...

Automatic Aircraft Cargo Load Planning with Pick-up and Delivery
;

Conference (2013, February 07)

This research aims to develop a new mixed integer linear program to solve the containers assignment problem when pickup and deliveries are considered. Given a pool of ULDs and an aircraft with multipl...

Intermodal network design for freight transportation in Belgium - location of rail/road and road/inland waterway terminals
;

Conference (2013, February 07)

In the recent years, growing concerns about environmental, societal and economic issues have emerged in the society. The improvement and the expansion of the multimodal network is one way of solving t...

Optimization model for empty container repositioning
;

Conference (2013, February 07)

Empty container management is a transportation issue relating to the imbalance of container demand and supply in various parts of the world. Hence the necessity for shippers to move empty containers t...

Méthodes Booléennes en recherche opérationnelle

Conference (2013, February)

Le titre de cette conférence est celui d'une monographie cosignée par Peter L. Hammer et Sergiu Rudeanu, et dont la publication en 1968 a inspiré un nombre important de travaux de recherche. Très ...

Algorithmes d'approximation pour les problèmes d'affectation multidimensionnels

Scientific conference (2013, January)

Le problème d'affectation multidimensionnel (PAM) consiste à partitionner les sommets d'un graphe m-parti en m-cliques disjointes de façon à minimiser la somme des coûts des cliques utilisées, o...

Généralisation Min Max pour l'Apprentissage par Renforcement Batch et Déterministe : Relaxations pour le Cas Général T Etapes
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in 8èmes Journées Francophones de Planification, Décision et Apprentissage pour la conduite de systèmes (JFPDA'13) (2013)

Cet article aborde le problème de généralisation minmax dans le cadre de l'apprentissage par renforcement batch et déterministe. Le problème a été originellement introduit par [Fonteneau, 2011]...

Simulation Gaming and Natural Language Processing for Modelling Stakeholder Behavior in Energy Investments
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in ICS'2013 Proceedings (2013)

Integration of Inland Waterway Transport in the Intermodal Supply Chain: a Joint Research Agenda
; ; ; ;

in Rigo, Philippe; Wolters, Milou (Eds.) Proceedings of the PIANC SMART Rivers Conference 2013 (2013)

This paper identifies research opportunities which will enable the further integration of inland waterway transport in the intermodal supply chain. Intermodal transport may be interpreted as a chain o...

Nonparametric regression with right-censored and generalized selection biased data
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Conference (2012, December 02)

Algorithms for testing the collective consumption model
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Conference (2012, November 09)

In this talk, we discuss an extension of the strong axiom of revealed preferences to collective households. The question that we address is whether a set of observed consumption baskets can be decompo...

Error distribution estimation in nonparametric regression with right censored selection biased data
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Conference (2012, October 25)

In this presentation, we study the nonparametric regression model Y = m(X) +sigma(X) * epsilon where the error epsilon, with unknown distribution, is independent of the covariate X, and m(X) = E[Y|X] ...

Comments to 'The time inconsistency factor: how banks adapt to their savers mix' (C. Laureti and A. Szafarz, working paper, 2012)

Scientific conference (2012, October 23)

Comments about 'The time-Inconsistency Factor: How banks adapt to their savers Mix' by C. Laureti and A. Szafarz (working paper, 2012)....

Inland intermodal freight transport modelling
; ;

in ETC Proceedings (2012, October 10)

The demand for goods has grown in the past decades, in such a way that today freight transport has become essential for the support of modern economies. The search for a competitive freight transport ...

A computationally efficient algorithm for the provision of a day-ahead modulation service by a load aggregator
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Poster (2012, October 08)

We study a decision making problem faced by an aggregator willing to offer a load modulation service to a Transmission System Operator (TSO). In particular, we concentrate on a day-ahead service consi...

Conditional Asset Allocation: Does Market-Wide Liquidity Matter?
; ;

Conference (2012, September 19)

Error distribution function for parametrically truncated and censored data
;

Conference (2012, September 14)

The sensitivity of optimal rail‐road terminal locations to intermodal freight costs variations
; ;

Conference (2012, September 05)

In the last decades, the market of goods became globalized, increasing international trade relations and the demand for long distance transportation. As a consequence of the larger distances traveled ...

Fusion alpha and proton diagnostics by thin layer activation
; ; ;

Conference (2012, September)

Automatic Cargo Load Planning: Special shipments
; ;

in ILS 2012 Proceedings (2012, August 28)

The aircraft loading problem is a real-world combinatorial optimisation problem highly constrained. Indeed, loading the aircraft so the gross weight is less than the maximum allowable is not enough. T...

Network design model for intermodal transport: the case of the hinterland of the Port of Cotonou
;

in ILS 2012 Proceeding (2012, August 27)

Since 2006, the Millennium Challenge Account program subsidizes a project to improve the performance of the Port of Cotonou, through modernization of infrastructure and management systems, and strengt...

Three dimensional Bin Packing Problem applied to air cargo
; ;

in ILS 2012 Proceedings (2012, August 26)

Deciding whether a set of three dimensional boxes can be packed into a container is a NP-hard problem. Mathematical models have been developed, however, only few studies take into account constraints ...

Asymptotic properties of the error distribution estimation in right censored and selection biased regression models
;

Conference (2012, June 16)

Suppose the random vector (X,Y) satisfies the nonparametric regression model Y=m(X)+sigma(X)*epsilon where m(X) =E [Y|X] and sigma^2(X) = Var [Y|X] are unknown smooth functions and the error epsilon, ...

Boolean Methods and Logical Analysis of Data

Conference (2012, June 09)

About 20 years ago, we proposed an innovative approach to data mining based on a blend of Boolean techniques and combinatorial optimization. The basic tenets of this approach were presented in a joint...

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Conference (2012, May 24)

Production scheduling and vehicle routing problems are well-known topics in operations management. Although these tasks are consecutive in the supply chain, few optimization models tackle the associat...

Intermodal transportation network design under uncertainty: case of the hinterland of the Port of Cotonou
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Scientific conference (2012, May 21)

Since 2006, the Millennium Challenge Account program subsidizes a project to improve the performance of the Port of Cotonou, through modernization of infrastructure and management systems, and strengt...

Généralisation min max pour l'apprentissage par renforcement batch et déterministe : schémas de relaxation
; ; ;

in Septièmes Journées Francophones de Planification, Décision et Apprentissage pour la conduite de systèmes (JFPDA 2012) (2012, May)

On s’intéresse au problème de généralisation min max dans le cadre de l’apprentissage par renforcement batch et déterministe. Le problème a été originellement introduit par Fonteneau et al...

Optimisation 3D du chargement de conteneurs pour le transport aérien
; ;

in LigéRO (Ed.) Proceedings ROADEF 2013 (2012, April 11)

De nos jours, décider comment remplir des conteneurs avec des colis est une activité courante aussi bien dans le domaine du transport routier qu’aérien. Ce type de question est apparentée aux pr...

Chargement de marchandises dans un avion cargo: le cas des marchandises nécessitant des précautions particulières
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Conference (2012, April)

D'une part, les entreprises de transport aérien ont acheminé en 2010 plus d’un tiers de la valeur des exportations mondiales. D'autre part, le chargement des avions est une opération complexe sou...

Some Applications of Mathematical Statistics in Management

Scientific conference (2012, March)

Three dimensional Bin Packing Problem applied to air transport
; ;

Conference (2012, February 02)

Packing boxes into containers is a daily process in many di erent elds and especially in transport. However, the particular case of air transport brings some new constraints such as the stability or t...

An Integer Programming model for air transport of hazardous and special shipments
; ;

Conference (2012, February 02)

The aircraft loading problem is a real-world combinatorial optimisation problem highly constrained. This weight must be distributed to keep the centre of gravity within speci ed limits. Moreover, an a...

Hybrid Tabu Search Heuristics for a Bilevel Competitive Facility Location Model
; ;

Conference (2012, February 02)

A modified economic-statistical design of the VP multivariate control charts
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Conference (2012, January 15)

Hotelling’s T2 control chart is one of the most popular multivariate control charts for monitoring multiple variables simultaneously. Recent studies have shown that applying the T2 control chart by ...

A Rich Vehicle Routing Problem with Multiple Trips and Driver Shifts
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Conference (2012)

This study is concerned with a rich vehicle routing problem (RVRP) encountered at a Belgian transportation company in charge of servicing supermarkets and hypermarkets belonging to a franchise. The st...

Estimation under left parametric truncation and right censoring
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Scientific conference (2012)

Estimation under left parametric truncation and right censoring
;

Scientific conference (2012)

Three Dimensional Bin Packing Problem applied to air cargo
; ;

Scientific conference (2011, December 15)

Deciding whether a set of three dimensional boxes can be packed into a container is a NP-hard problem. Mathematical models have been developed, however, only few studies take into account constraints ...

Chargement d’un avion cargo : le cas des marchandises nécessitant des précautions particulières
; ;

Conference (2011, December 15)

Le problème du chargement de marchandises dans un avion cargo est soumis à des contraintes strictes de sécurité. C’est un problème d’optimisation combinatoire d’une importance cruciale pour...

The Economic and Statistical Designs of Control charts for Censored and Non-Normal Data
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Scientific conference (2011, December)

In this research, we are dealing with constructing the statistical design (SD) and economic statistical design (ESD) of Shewhart and CUSUM control charts for reliability data which are right censored....

Relaxation schemes for min max generalization in deterministic batch mode reinforcement learning
; ; ;

in 4th International NIPS Workshop on Optimization for Machine Learning (OPT 2011) (2011, December)

We study the min max optimization problem introduced in [Fonteneau, 2011] for computing policies for batch mode reinforcement learning in a deterministic setting. This problem is NP-hard. We focus on ...

Quantile regression in nonparametric location-scale models with censored data
;

Conference (2011, December)

Testing for one-sided alternatives in nonparametric censored regression
;

Conference (2011, December)

Estimation of the Error Distribution in a Semiparametric Transformation Model
; ;

Scientific conference (2011, November 15)

Testing for one-sided alternatives in nonparametric censored regression
;

Scientific conference (2011, November 09)

Boolean methods in operations research and related areas

Conference (2011, November)

These are the slides of the "IFORS Distinguished Lecture" that I delivered at the INFORMS Annual meeting in November 2011. The title of the lecture is the title of a monograph co-authored by...

MULTIOBJECTIVE DESIGN OF CONTROL CHARTS
;

Conference (2011, September 24)

Monitoring delivery chains in a supply chain using multivariate control charts
; ; ;

Conference (2011, July 13)

The theory of the delivery chain considers the delivery of goods and services to customers within a specific time interval. Nowadays, organizations are focusing to satisfy their customers’ demands n...

A capacity game in transportation management
;

Conference (2011, July 10)

This study analyzes the contractual relation between a retailer and a carrier with the aim of determining possible deviations from the optimal system performance. In order to face a random demand, the...

Error distribution estimation in right censored and selection biased location-scale models
;

Poster (2011, June 23)

Suppose the random vector (X;Y) satis es the regression model Y = m(X)+sigma(X)*epsilon where m(X) = E[Y|X] and sigma²(X) = Var[Y|X] are unknown smooth functions and the error epsilon, with unknown d...

Nonparametric regression with parametric selection bias
;

in Proceedings of the 14th Conference of the ASMDA International Society (ASMDA2011) (2011, June)

Control and Voting Power in Complex Shareholding Networks
; ;

Conference (2011, June)

Automatic Cargo Load Planning: Special shipments
;

Scientific conference (2011, May 25)

The aircraft loading problem is a real-world combinatorial optimisation problem highly constrained. Indeed, loading the aircraft so the gross weight is less than the maximum allowable is not enough. T...

Intermodal transportation network design for the hinterland of the hinterland of the Port of Cotonou
;

in Cornelis, Eric (Ed.) Proceedings of the BIVEC-GIBET Transport Research Day 2011 (2011, May 25)

Since 2006, the Millennium Challenge Account program subsidizes a project to improve the performance of the Port of Cotonou, through modernization of infrastructure and management systems, and strengt...

;

Conference (2011, May)

Planification automatique de chargements d'avions cargo
;

Scientific conference (2011, April 18)

; ; ; ;

Scientific conference (2011, April 07)

Identification du profil du consommateur par datamining

Scientific conference (2011, April)

Complexity results and exact algorithms for robust knapsack problems
;

Scientific conference (2011, March 04)

A capacity game in transportation management
;

Conference (2011, March 03)

Emerging concerns about competitiveness induce a growing number of firms to outsource their outbound transportation operations to third-party logistics providers. The resulting increase in the number ...

; ;

in Proceedings (2011, March 02)

The goal of this paper is the development of a new mixed integer linear pro- gram designed for optimally loading a set of containers and pallets into a compartmentalised cargo aircraft. It is based on...

Testing for one-sided alternatives in nonparametric censored regression
;

Scientific conference (2011, February 08)

Extracting explicit and implicit causal relations from sparse, domain-specific texts
;

in Lecture Notes in Computer Science (2011)

Online Sparse Bandit for Card Games
; ;

in Advance in Computer Games (2011)

Finding an approximation of a Nash equilibria in matrix games is an important topic that reaches beyond the strict application to matrix games. A bandit algorithm commonly used to approximate a Nash e...

Conference (2010, December 14)

The aircraft loading problem is a real-world combinatorial optimisation problem highly constrained. Indeed, loading the aircraft so the gross weight is less than the maximum allowable is not enough. T...

Introduction of the asymptotic study of the estimation of the error distribution in right censored and selection biased regression models
;

Poster (2010, October)

Consider the regression model Y = m(X) + σ(X) Ɛ where m(X) = E[Y|X] and σ²(X)=Var[Y|X] are unknown smooth functions and the error Ɛ , with unknown distribution, is independent of the covariate X....

Operations Research for the steel industry : the art of combining science and knowledge
;

Conference (2010, October)

Computational treatment of the error distribution in nonparametric regression with right-censored and selection-biased data
;

Conference (2010, August 24)

Consider the regression model Y = m(X) + σ(X) Ɛ , where m(X) = E[Y|X] and σ²(X) = Var[Y|X] are unknown smooth functions and the error Ɛ (with unknown distribution) is independent of X. The pair (...

Wear study on polymers and bio-materials by ultra thin layer activation
; ; ; ; ; ;

Poster (2010, August)

A Bilevel Competitive Facility Location Model with Competitor’s Response
; ;

Conference (2010, July 11)

We are concerned with a problem in which a new entrant leader firm aims at finding the location and attractiveness of each new facility to maximize its profit where there are existing facilities belon...

Sparse Two-Row Cuts and an Algorithm for the Separation Problem

Conference (2010, July)

We propose a systematic way to generate sparse cuts from multiple rows of the simplex tableau. We also discuss the question of separation for a multi-row model. To this end, we consideer the polar sys...

Computational study of the error distribution in right-censored and selection-biased regression models
;

Conference (2010, May 18)

Consider the regression model Y = m(X) + σ(X) Ɛ where m(X) =E [Y|X] and σ²(X) = Var [Y|X] are unknown smooth functions and the error Ɛ, with unknown distribution, is independent of X. The pair (X...

Challenging Combinatorial Problems

Conference (2010, May 06)

Logical Analysis of Data and Classification

Conference (2010, March 25)

Control and Voting Power in Shareholding Networks

Conference (2010, March 18)

Models for Decision Making: From Applications to Mathematics... and Back

Conference (2010, March 15)

In this inaugural lecture, I describe some facets of the interplay between mathematics and management science, economics, or engineering, as they come together in operations research models. I intend ...

; ; ; ;

Conference (2010, January 29)

A capacity game in transportation planning
;

Conference (2010, January 28)

Emerging concerns about competitiveness induce a growing number of firms to outsource their outbound transportation operations to third-party logistics providers. The resulting increase in the number ...

Location and market area of rail-road terminals
;

Scientific conference (2010, January 28)

The European transport policy has focused on sustainable transport solutions. One of its objectives for freight transport is to restore the balance between modes and to develop intermodality. Among th...

Computational treatment of the error distribution in nonparametric regression with right-censored and selection-biased data
;

in Proceedings of the 19th International Conference on Computational Statistics (2010)

On Learning Subtypes of the Part-Whole Relation: Do Not Mix Your Seeds
;

in Proceedings of the Association for Computational Linguistics (2010)

A hybrid tabu search heuristic for a bilevel competitive facility location model
; ;

in Blesa, Maria J.; Blum, Christian; Raidl, Günther; Roli, Andrea; Sampels, Michael (Eds.) Hybrid metaheuristics: 7th International Workshop, HM 2010, Vienna, Austria, October 2010, Proceedings (2010)

We consider a problem in which a firm or franchise enters a market by locating new facilities where there are existing facilities belonging to a competitor. The firm aims at finding the location and a...

Analysis of thin layers for photovoltaic application: Comparison between RBS and ellipsometry on the determination of roughness and porosity
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Poster (2010)

Extracting Meronymy Relationships from Domain-Specific, Textual Corporate Databases
; ; ;

in Lecture Notes in Computer Science (2010)

Textractor: A Framework for Extracting Relevant Domain Concepts from Irregular Corporate Textual Datasets
; ; ;

in Lecture Notes in Business Information Processing (2010)

Testing for one-sided alternatives in nonparametric censored curve comparison
;

in Proceedings of the 28th European Meeting of Statisticians. (2010)

Split rank of two-row cuts

Conference (2009, December)

A simple relaxation consisting of two rows of a simplex tableau is a mixed-integer set with two equations, two free integer variables, and nonnegative continuous variables. Recently, Andersen et al. a...

Scientific conference (2009, November 13)

Estimation of the error distribution in right censored and selection biased regression models
;

Conference (2009, October 15)

Consider the location-scale regression model Y=m(X) + σ(X) Ɛ where the error Ɛ is independent of the covariate X and where m and σ are unknown smooth functions. The pair (X; Y ) is subject to gene...

Geometric Study of Mixed-integer Sets from Two Rows of Two Adjacent Simplex Bases

Conference (2009, August)

We generalize the study of sets arising from two rows of a simplex tableau by considering bounds on the nonbasic variables. We show that new classes of facets arise that cannot be obtained from triang...

A discrete competitive facility location model with variable attractiveness
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Conference (2009, July 08)

We consider the discrete version of the competitive facility location problem in which new facilities have to be located by a new market entrant to compete against already existing ones that may belon...

; ; ; ;

Conference (2009, July 07)

The increased availability of information makes it possible to coordinate processes which are usually functionnally separated in large companies, such as production and transportation. This work inves...

Semiparametric inference in general heteroscedastic regression models.

Scientific conference (2009, June 09)

Alimentation durable : De la promotion des filières courtes à la promotion d’emplois durables
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Scientific conference (2009, March)

Consommation durable ? Le thème de la consommation durable est relativement neuf. Il trouve ses origines au Sommet de la Terre qui s’est tenu en 1992 à Rio de Janeiro. Ce thème part du constat qu...

Evaluation de projets d’investissement en utilisant la simulation de Monte Carlo
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Conference (2009, February 10)

L’exploration et le développement d’un champ pétrolier font face à de nom- breuses incertitudes liées aux rendements et aux coûts tout au long du cycle de vie du pro jet. A titre d’exe...

Sélection du portefeuille de projets d'exploration production en utilisant la méthode de Markowitz
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Conference (2009, February 10)

Deux caractéristiques importantes de l’investissement en exploration ou production pétrolière sont les montants financiers très importants en jeu et les incertitudes élevées. Pour ces raisons,...

Using OR techniques for projets selection in the petrol industy
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Conference (2009, February 05)

Two important characteristics of petroleum exploration and production investment are the high nancial amounts and uncertainties. For these rea- sons, the risk analysis should be implemented in the pro...

Optimal Design and Dimensioning of Hydrogen Transmission Distribution Pipeline Networks
; ; ; ; ;

Conference (2009, February 05)

This work considers the problem of the optimal design of an hydrogen transmission network. This design problem includes the topology determi- nation and the dimensioning problem. We define a solution ...

Split rank of triange and quadrilateral inequalities

Conference (2009, January)

A simple relaxation consisting of two rows of a simplex tableau is a mixed-integer set with two equations, two free integer variables, and nonnegative continuous variables. Recently, Andersen et al. a...

Market area of intermodal rail-road container terminals embedded in a hub-and-spoke network

Conference (2009)

This paper presents a methodology able to compare road and rail-road intermodal market areas that takes the network structures, the operation costs and the location of the rail-road terminals into acc...

Development of an RMS model based on colored object-oriented Petri nets with changeable structures
;

in IEEE Proceedings of the 16th International Conference on Industrial Engineering and Engineering Management (2009)

Semiparametric inference in general heteroscedastic regression models
;

in Proceedings of the Sixth Petersburg Workshop on Simulations (2009)

The Didam framework Disaggregated demand and assignment models for combined passengers and freight transport
; ; ; ;

Conference (2009)

The objective of this paper is to present the methodological developments in the DIDAM (Disaggregated demand and assignment models for combined passengers and freight transport) research project, whic...

Systèmes d'information de gestion modernes

Scientific conference (2008, December)

Robust Portfolio Selection

in JSM Proceedings, Statistical Computing Section (2008, November)

In many financial problems, small variations in some inputs may result in big changes in the outputs. In this talk, we consider the problem of portfolio selection as suggested by Markowitz. This model...

Least-Cost Development of Hydrogen Transmission-Distribution Pipeline Networks
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Conference (2008, June)

Optimisation couplée topologie/dimensionnement de réseaux de canalisations
; ; ; ; ;

Conference (2008, May)

Scientific conference (2008, April 24)

Un problème de chargement/déchargement profitable d'une flotte de véhicules soumise à des fenêtres de temps
; ;

Conference (2008, February 26)

In most pickup and delivery problems, usually the aim is to minimize either the trip length or duration or the fleet size. Transportation orders or customers are finite sets which should be performed ...

Solving the gas transmission problem with consideration of the compressors
;

Conference (2008, February 25)

In [7], De Wolf and Smeers consider the problem of the gas distribution through a network of pipelines. The problem was formulated as a cost minimization subject to nonlinear flow-pressure relations, ...

A profitable pickup and delivery problem with time windows
; ;

Conference (2008, January 18)

In most pickup and delivery problems, usually the aim is to minimize either the trip length or duration or the fleet size. Transportation orders or customers are finite sets which should be performed ...

Optimal dimensioning of pipe networks: the new situation when the distribution and the transportation functions are disconnected
;

Conference (2008, January)

In [9], De Wolf and Smeers consider the problem of the optimal dimensioning of a gas transmission network when the topology of the network is known. The pipe diameters must been chosen to minimize the...

Evaluation of traffic polluting gases emissions using OR techniques: the case of the city of Tunis
;

Conference (2008, January)

The purpose of this paper is to show how the operations research techniques can help to evaluate the emissions of polluting gases from road traffic in urban area. Our practical study case is the cente...

Multicriterion Scantling Optimization of the Midship Section of a Passenger Vessel considering IACS Requirements
; ; ; ; ; ;

in The 10th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS) (2007, October)

In the scantling design of a passenger ship, minimum production cost, minimum weight and maximum moment of inertia (stiffness) are conflicting objectives. For that purpose, recent improvements were ma...

Cutting planes and infeasibility certificates from lattice-point-free polyhedra

Conference (2007, July)

A central result in the theory of integer optimization states that a system of linear diophantine equations Ax = b has no integral solution if and only if there exists a vector in the dual lattice, yT...

A mixed-integer heuristic for the structural optimization of a cruise ship
; ; ;

in COMPIT 2007 , Cortona, Italy (2007, April 23)

A heuristic approach is proposed to solve the structural optimization problem of a cruise ship. The challenge of optimization is to define the scantling of the structure of a ship in order to minimize...

Cutting planes from lattice-point-free polyhedra

Conference (2007, January)

In this talk, we generalize the concept of a split (that leads to split cuts) to any lattice-point-free polyhedron. We show how we can generate cutting planes for a polyhedron from these objects. Asso...

Parametric conditional mean and variance testing with censored data
; ;

in ASMDA2007 Proceedings (2007)

Inventory control in a decentralized two-stage make-to-stock queuing system
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in INCOM 06, 12th IFAC Symposium on Information Control Problems in Manufacturing, Saint-Etienne, France, 17-19 May 2006 (2006, May 17)

In an Enterprise network, several companies interact to produce families of goods. Each member company seeks to optimize his own production and inventory policy to maximize his profit. These objective...

Contracting in manufacturing networks with inventories
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Conference (2006, April 18)

An important issue in the management of supply chains and manufacturing systems is to achieve the desired customer service level while respecting the individual economic objectives of the partners. Th...

Coordination de chaînes logistiques, une approache par la théorie des jeux
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in MOSIM 06, 6e Conférence Francophone de MOdélisation et SIMulation, Rabat, Maroc, 3-5 Avril 2006 (2006, April 03)

Les chaînes logistiques étudiées sont constituées de différentes entreprises qui interviennent dans le processus de fabrication d’une famille de produits. Pour chaque entreprise, il s’agit pr...

Optimisation d'un contrat de coordination entre producteur et fournissuer
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Conference (2006, February 06)

Cet article analyse comme un jeu de Stackelberg la négociation d’un contrat au sein d’une chaîne logistique à deux niveaux, qui est constituée de deux étages de production/stockage gérés pa...

Intermediate integer programming representations using value disjunctions

Conference (2006, January)

We introduce a general technique for creating an extended formulation of a mixed-integer program. We classify the integer variables into blocks, each of which generates a finite set of vector values. ...

Inter-modal freight terminal location in Europe: a strategic model

Conference (2006)

The political pressure in favour of multi- and inter-modal transport has oriented the focus on sustainable transport solutions. Inter-modal transport is one of the (partial) possible solutions, but it...

A Text Mining-based Recommendation System for Customer Decision Making in Online Product Customization
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in IEEE Proceedigns of International Conference on Management of Innovation and Technology (2006)

Supply chain coordination through contract negotiation
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in DC-ECC 06, 44th IEEE Conference on Decision and Control and the European Control Conference, Seville, Spain, 12-15 December 2005 (2005, December 12)

The purpose of the paper is to evaluate the efficiency of different types of contracts between the industrial partners of a supply chain. Such an evaluation is made on the basis of the relationship be...

Discrete optimization

Poster (2005, September)

Have you ever wondered what is the shortest route to join the office? What is the best way to plan a trip through several cities? You have maybe already played with magical squares? Then you have met ...

Impact des délais d'approvisionnement sur les performances de chaînes logistiques

Conference (2005, May 19)

Les chaînes logistiques sont souvent constituées de différentes entreprises qui interviennent dans le processus de fabrication d’une famille de produits. Pour chaque entreprise particulière, il ...

Optimization of Surface Allocation using Heuristic Approaches
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in COMPIT 2005 , Hambourg, Germany (2005, May)

In this paper, we present a scheduling problem that arises in factories producing large building blocks (in our case, a shipyard workshop producing prefabricated keel elements). The factory is divided...

Valid inequalities for the intersection of two knapsacks

Conference (2005, March)

We address the question to what extent polyhedral knowledge about individual knapsack constraints suffices or lacks to describe the convex hull of the binary solutions to their intersection. It turns ...

Inter-modal freight terminals location: Discover the best potential locations on large networks
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Conference (2005)

The optimal location of a facility is a rather complex task that was already studied many times. Several optimal location problems and solution exists, but only a few can be applied to the location of...

Optimal location of inter-modal terminals
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Conference (2005)

The optimal location of a facility is a rather complex task that was already studied many times. Several optimal location problems and solution exists, but only a few can be applied to the location of...

Inter-Modal Terminals for Freight
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Conference (2005)

The optimal location of terminals and logistic centres is an up-to-date research topic. The first goal of this paper is to outline a method that helps to isolate the best potential locations. The basi...

Solving the m-TSP Problem with Stochastic or Time Dependent Demands
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in Opasanon, S.; Miller-Hooks, E. (Eds.) Proceedings of TRISTAN V (Triennial Symposium on Transportation Analysis) (2004, June)

There are many examples of problems in transportation where some elements are uncertain. In the distribution of goods as well as systems responding to calls for emergency, demands typically occur in a...

Optimizing the ordering policy in a supply chain
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in INCOM 04, 11th IFAC Symposium on Information Control Problems in Manufacturing, Salvador, Brazil, 5-7 April 2004 (2004, May 05)

This study analyzes an inventory management problem within a supply chain. An enterprise whose stock is replenished by outside suppliers faces random demands for one of its products. The objective is ...

Inventory control in a multi-supplier system
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in IGLS 04, 13th International Working Seminar on Production Economics, Igls/Innsbruck, Austria, 16-20 February 2004 (2004, February 16)

An enterprise network is analyzed from the viewpoint of an end-product manufacturer who receives customer orders and organises his production and supply policy so as to minimize the sum of his average...

Four extended formulations of the corner polyhedron

Conference (2004, January)

Nonparametric censored regression using preliminary kernel smoothing
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in Proceedings of the 6th World Congress of the Bernoulli Society for Mathematical Statistics and Probability and the 67th Annual Meeting of the IMS (2004)

Optimal location of inter-modal terminals
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Conference (2004)

The known methods to solve the problem of the optimal location of inter-modal terminals are “node” based, in the sense that they use the locations of the demands and the supplies as main input. Th...

The case sensitivity function approach to diagnostic and robust computation: a relaxation strategy
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in Antoch, Jaromir (Ed.) COMPSTAT 2004: Proceedings in Computational Statistics (2004)

Lifting of valid inequalities revisited

Conference (2003, August)

Estimation in censored linear regression via preliminary smoothing
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in Bulletin of the International Statistical Institute, 54th Session (2003)

A two-stage stochastic programming framework for transportation planning in disaster response
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Conference (2002, July 08)

This study proposes a two-stage stochastic programming model to plan the transportation of vital first-aid commodities to disaster-affected areas during emergency response. A multi-commodity multi-mod...

Integration of fuzzy linear optimization and scenario analysis in network flow problems: disaster response perspective
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in IEPM 01, International Conference in Industrial Engineering and Production Management, Québec, Canada, 20-23 August 2001 (2001, August 20)

In this paper, we address the problem of transporting vital commodities and emergency personnel during the response stage of a disaster relief operation by integrating fuzzy linear optimization and th...

Analysis of STEM-like solutions to multi-objective programming problems

in Hartley, R.; Thomas, L.C.; White, D.J.; French, S. (Eds.) Multi-Objective Decision Making (1983)

An introduction to the ELECTRE research programme
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in Hansen, Pierre (Ed.) Essays and Surveys on Multiple Criteria Decision Making (1983)

The discrete multicriteria decision problem has attracted a large amount of attention during the last 15 years. In contrast with multi-attribute utility theory, prevailing in the U.S., a series of met...

HEC-Management School - University of Liège