| Name | Co-authors | Talk | Session |
Maryam Abdolali
Amirkabir University of Technology (Tehran Polytechnic)
| Nicolas Gillis | More Robust and Scalable Sparse Subspace Clustering Based on Multi-Layered Graphs and Randomized Hierarchical Clustering | Friday 13:00 - 14:00 | |
Babiche Aerts
University of Antwerp
| T. Cornelissens, K. Sorensen | A decade of academic research on warehouse order picking: trends and challenges | Thursday 15:20 - 16:20 | |
Imène Ait Abderrahim
University of Oran 1 Ahmed Benbella, Algeria
Algeria | Lakhdar Loukil, Thomas Stützle | Automatic configuration of metaheuristics for the Q3AP | Thursday 11:00 - 12:20 | |
Ayse Akbalik
LCOMS, Université de Lorraine
| Christophe RAPINE, Guillaume GOISQUE | Dynamic programming algorithms for energy constrained lot sizing problems | Friday 13:00 - 14:00 | |
Man Shun Ang
Universite de Mons | Nicolas Gillis | Log-determinant Non-Negative Matrix Factorization via Successive Trace Approximation | Thursday 15:20 - 16:20 | |
Florian Arnold
University of Antwerp | Johan Springael, Kenneth Sörensen | Vertical supply chain integration - Is routing more important than inventory management? | Thursday 13:30 - 14:50 | |
Dirk Briskorn
University of Wuppertal
| Nils Boysen, Stefan Fedtke, Stefan Schwerdfege | Drone delivery from trucks: Drone scheduling for given truck routes | Friday 13:00 - 14:00 | |
Justin Buhendwa Nyenyezi
Université de Namur | | Benchmarking some iterative linear systems solvers for deformable 3D images registration | Thursday 13:30 - 14:50 | |
Reshma Chirayil Chandrasekharan
KU Leuven | Tulio A. M. Toffolo, Tony Wauters | A constructive matheuristic strategy for the Traveling Umpire Problem | Friday 14:10 - 15:10 | |
Jan Christiaens
KU Leuven | Tony Wauters, Greet Vanden Berghe | Benchmarks for the prisoner transportation problem | Thursday 13:30 - 14:50 | |
Jérémy Cohen
UMONS/FNRS
| Nicolas Gillis | Spectral Unmixing with Multiple Dictionaries | Thursday 13:30 - 14:50 | |
Jeroen Corstjens
Hasselt University | An Caris, Benoît Depaire | An analysis on the destroy and repair process in large neighbourhood search applied on the vehicle routing problem with time windows | Thursday 16:30 - 17:10 | |
Nguyen Dang
KU Leuven KULAK | Patrick De Causmaecker | Analysis of algorithm components and parameters using surrogate modelling: some case studies | Thursday 11:00 - 12:20 | |
Morteza Davari
KU Leuven
| Mohammad Ranjbar, Roel Leus, Patrick De Causmaecker | Minimizing makespan on a single machine with release date and inventory constraints | Friday 13:00 - 14:00 | |
Bernard De Baets
Universiteit Gent
| Raúl Pérez-Fernández, Marc Sader | Improving the quality of the assessment of food samples by combining absolute and relative information | Friday 13:00 - 14:00 | |
Jérôme De Boeck
Université Libre de Bruxelles | Luce Brotcorne, Fabio D'Andreagiovanni, Bernard Fortz | Unit Commitment under Market Equilibrium Constraints | Thursday 13:30 - 14:50 | |
Kim De Boeck
KU Leuven
| Raïsa Carmen, Nico Vandaele | Prioritization between boarding patients and patients currently waiting or under treatment in the emergency department | Thursday 11:00 - 12:20 | |
Renaud De Landtsheer
CETIC
| Quentin Meurisse | Generic Support for Global Routing Constraint in Constraint-Based Local Search Frameworks | Friday 10:50 - 12:10 | |
Christof Defryn
Maastricht University
Netherlands | Debdatta Sinha Roy, Bruce Golden | Addressing Uncertainty in Meter Reading for Utility Companies using RFID Technology: Simulation Experiments | Friday 13:00 - 14:00 | |
Hans Degroote
KU Leuven Kulak | Patrick De Causmaecker; José Luis González Velarde | Towards Algorithm Selection for the Generalised Assignment Problem | Thursday 11:00 - 12:20 | |
Landelin Delcoucq
University of Mons
| | Design and implementation of a modular distributed and parallel clustering algorithm | Friday 13:00 - 14:00 | |
Reginald Dewil
Katholieke Universiteit Leuven | Ilker Küçükoglu, Corrinne Luteyn, Dirk Cattrysse | Multi-tool hole drilling with sequence dependent drilling times | Thursday 16:30 - 17:10 | |
Melvin Drent
University of Luxembourg
Luxembourg | Joachim Arts | Stocking and Expediting in Two-Echelon Spare Parts Inventory Systems under System Availability Constraints | Friday 13:00 - 14:00 | |
Flavia Esposito
Università degli Studi di Bari Aldo Moro, Italy
| Nicolas Gillis, Nicoletta Del Buono | Orthogonal Joint Sparse NMF for 3D-Microarray Data Analysis | Thursday 15:20 - 16:20 | |
Anna Fernández Antolín
TRANSP-OR, EPFL
Switzerland | Virginie Lurkin, Michel Bierlaire | Maximum likelihood estimation of discrete and continuous parameters: an MILP formulation | Friday 14:10 - 15:10 | |
Véronique François
HEC Liège - Management School of the University of Liège | Yasemin Arda, Diego Cattaruzza, Maxime Ogier | Home chemotherapy: optimizing the production and administration of drugs. | Friday 10:50 - 12:10 | |
Fabian Germeau
CETIC
| Yoann Guyot, Gustavo Ospina, Renaud De Landtsheer, Christophe Ponsard | Easily Building Complex Neighbourhoods With the Cross-Product Combinator | Friday 10:50 - 12:10 | |
Nicolas Gillis
University of Mons | Yaroslav Shitov | Low-Rank Matrix Approximation in the Infinity Norm | Thursday 13:30 - 14:50 | |
Thomas Hacardiaux
Université catholique de Louvain | Jean-Sébastien Tancrez | Assessing Collaboration In Supply Chain | Friday 10:50 - 12:10 | |
Hilde Heggen
Universiteit Hasselt | An Caris, Kris Braekers | The simultaneous vehicle routing and service network design problem in intermodal rail transportation | Thursday 13:30 - 14:50 | |
Ben Hermans
KULeuven | Roel Leus | Scheduling Markovian PERT networks to maximize the net present value: New results | Thursday 15:20 - 16:20 | |
Jean-philippe Hubinont
ULB
| José Rui Figueira, Yves De Smet | Exact solution methods for the bi-objective \{0, 1\}-quadratic knapsack problem | Thursday 11:00 - 12:20 | |
Sarah Itani
University of Mons | Fabian Lecron & Philippe Fortemps | A density-based decision tree for one-class classification | Friday 14:10 - 15:10 | |
Farzaneh Karami
KU Leuven
| Wim Vancroonenburg, Greet Vanden Berghe | A buffering-strategy-based solution method for the dynamic pickup and delivery problem with time windows | Thursday 11:00 - 12:20 | |
Mumtaz Karatas
National Defense University, Turkish Naval Academy
Turkey | Ertan Yakici | Optimization of Emergency Service Center Locations Using an Iterative Solution Approach | Thursday 11:00 - 12:20 | |
Selma Koghee
Royal Military Academy
| F. Van Utterbeeck, M. Debacker, I. Hubloue, E. Dhondt | Expanding the SIMEDIS simulator for studying the medical responce in disaster scenarios | Thursday 11:00 - 12:20 | |
Wouter Lefever
Ghent University | El-Houssaine Aghezzaf, Khaled Hadj-Hamou | Stochastic solutions for the Inventory-Routing Problem with Transshipment | Thursday 13:30 - 14:50 | |
Stef Lemmens
KU Leuven | Catherine Decouttere, Nico Vandaele, Mauro Bernuzzi, Amir Reichman | The inventory/capacity trade-off with respect to the quality processes in a Guaranteed Service Vaccine Supply Chain | Thursday 16:30 - 17:10 | |
Valentin Leplat
UMons
| Nicolas Gillis, Xavier Siebert | Audio Source Separation Using Nonnegative Matrix Factorization | Thursday 15:20 - 16:20 | |
Pieter Leyman
KU Leuven KULAK
België | Patrick De Causmaecker | What is the impact of a solution representation on metaheuristic performance? | Friday 10:50 - 12:10 | |
Virginie Lurkin
École polytechnique fédérale de Lausanne
Suisse | A. Zanarini, S.S. Azadeh, Y. Maknoon, M. Bierlaire | Planning of feeding station installment and battery sizing for an electric urban bus network | Friday 10:50 - 12:10 | |
Corrinne Luteyn
KU Leuven | Pieter Vansteenwegen | Improving the Last Mile Logistics in a City Area by Changing Time Windows | Thursday 11:00 - 12:20 | |
Oussama Mazari Abdessameud
VUB | Filip Van Utterbeeck, Johan Van Kerckhoven, Marie-Anne Guerry | Military manpower planning through a career path approach | Thursday 11:00 - 12:20 | |
Stefano Michelini
HEC Liège - Management School of the University of Liège | Yasemin Arda, Hande Küçükaydin | A comparative study of branch-and-price algorithms for a vehicle routing problem with time windows and waiting time costs | Thursday 11:00 - 12:20 | |
Yves Molenbruch
Hasselt University | Kris Braekers | Integrating dial-a-ride services and public transport | Thursday 13:30 - 14:50 | |
Stef Moons
UHasselt - Hasselt University | Kris Braekers, Katrien Ramaekers, An Caris, Yasemin Arda | Solving an integrated order picking-vehicle routing problem with record-to-record travel | Thursday 13:30 - 14:50 | |
Federico Mosquera
KU Leuven
| Pieter Smet, Greet Vanden Berghe | Analyzing objective interaction in lexicographic optimization | Thursday 11:00 - 12:20 | |
| | Abstract:
Despite the multitude of optimization methods proposed throughout operational research literature, such approaches can be difficult to grasp for decision-makers who lack a technical background. Solving a multi-objective optimization problem requires expertise from the decision-makers to manage complex objectives which may interact unintuitively. This study focuses on improving lexicographic optimization, a type of approach which has the advantage of being easily implemented by decision-makers given that its only requirement is the hierarchical arrangement of objectives in terms of their relative importance.
A pure lexicographic strategy optimizes each objective sequentially, in order of importance, without deteriorating previous objectives. Algorithmic performance is, however, often hindered when a pure lexicographic optimization strategy is employed. Typically, heuristic methods quickly converge to a local optimum which, depending on the specifics of the solution space, results in poor solutions. Employing integer programming solvers may also prove difficult as lexicographic optimization is not implemented natively and often requires solving the integer programming problem several times. This study overcomes these difficulties by first analyzing objective interactions and categorizing the various objectives accordingly. This information is subsequently used to develop a new methodology which seeks to improve search algorithms for solving lexicographic optimization problems.
A real-world case study concerning home care scheduling demonstrates how the proposed methodology improves pure lexicographic optimization. Home care scheduling not only involves the scheduling of caregivers, but also their assignment and routing, both of which are necessary to deliver the necessary services to different clients. Among the objectives requiring optimization are task frequency, travel time, caregiver/client preference satisfaction and the weekly spreading of tasks. Despite the complexity of these objectives, lexicographic optimization offers a user-friendly approach but, as demonstrated by way of a series of computational experiments, may result in poor quality solutions. Computational results demonstrate how the new methodology based on inter-objective relations results in better solutions.
|
Boris Ndjia Njike
Université de Mons | Xavier Siebert | Risk bounds on statistical learning | Friday 14:10 - 15:10 | |
Meritxell Pacheco Paneque
TRANSP-OR EPFL
Switzerland | Shadi Sharif Azadeh, Michel Bierlaire, Bernard Gendron | Integrating advanced discrete choice models in mixed integer linear optimization | Friday 14:10 - 15:10 | |
Raúl Pérez Fernández
Ghent University
| Bernard De Baets | On facility location problems and penalty-based aggregation | Friday 13:00 - 14:00 | |
Tu San Pham
KU Leuven | Jo Devriendt, Patrick De Causmaecker | Formalize neighbourhoods for local search using predicate logic | Friday 10:50 - 12:10 | |
José Miguel Quesada PÉrez
Université catholique de Louvain | Jean-Charles Lange, Jean-Sébastien Tancrez | Considering complex routes in the Express Shipment Service Network Design problem | Friday 10:50 - 12:10 | |
Elisabeth Rodriguez Heck
HEC Liège - Management School of the University of Liège | Yves Crama | Linear and quadratic reformulation techniques for nonlinear 0-1 optimization problems | Thursday 13:30 - 14:50 | |
Jean Rosenfeld
Université libre de Bruxelles | Van Assche Dimitri, De Smet Yves | Extensions of PROMETHEE to multicriteria clustering: recent developments | Friday 13:00 - 14:00 | |
Nico André Schmid
Ghent University | Veronique Limère | Optimizing line feeding under consideration of variable space constraints | Thursday 15:20 - 16:20 | |
Punit Sharma
University of Mons | Nicolas Gillis | On computing the distances to stability for matrices | Thursday 13:30 - 14:50 | |
Xavier Siebert
Faculté Polytechnique de Mons | Nouara Bellahdid, Moncef Abbas | Comparison of active learning classification strategies | Friday 14:10 - 15:10 | |
Bart Smeulders
HEC Liège - Management School of the University of Liège
| Yves Crama, Frits C.R. Spieksma | Robust Kidney Exchange Programs | Friday 10:50 - 12:10 | |
Guopeng Song
KU Leuven | Daniel Kowalczyk, Roel Leus | The Robust Machine Availability Problem | Thursday 15:20 - 16:20 | |
Ayman Srour
Ku leuven | Patrick De Causmaecker | Searching the Design Space of Adaptive Evolutionary Algorithms | Thursday 11:00 - 12:20 | |
Charlotte Tannier
N-SIDE | Benoit David, Sebastien Coppe | Optimization tool for the drug manufacturing in the pharmaceutical industry | Thursday 16:30 - 17:10 | |
Emmanouil Thanos
KU Leuven
| Tony Wauters, Greet Vanden Berghe | Scheduling container transportation with capacitated vehicles through conflict-free trajectories: A local search approach | Thursday 15:20 - 16:20 | |
Renata Turkes
University of Antwerp | Kenneth Sörensen, Daniel Palhazi Cuervo | A matheuristic for the problem of pre-positioning relief supplies | Friday 10:50 - 12:10 | |
David Van Bulck
Ghent University | Dries Goossens | Scheduling time-relaxed double round-robin tournaments with availability constraints | Friday 14:10 - 15:10 | |
Jens Van Engeland
KU Leuven Campus Brussel | Carolien Lavigne | A model for container collection in a local recycle network | Thursday 11:00 - 12:20 | |
Teun Van Gils
Hasselt University | Katrien Ramaekers & An Caris | Reducing Picker Blocking in a Real-life Narrow-Aisle Spare Parts Warehouse | Thursday 16:30 - 17:10 | |
Michiel Van Lancker
KU Leuven
| Greet Vanden Berghe, Tony Wauters | Intermodal Rail-Road Terminal Operations | Thursday 16:30 - 17:10 | |
Sofie Van Thielen
KU Leuven | Pieter Vansteenwegen | Creating a dynamic impact zone for conflict prevention in real-time railway traffic management | Thursday 16:30 - 17:10 | |
Lien Vanbrabant
Hasselt University | Niels Martin, Katrien Ramaekers, Kris Braekers | Input data quality assessment in the context of emergency department simulations | Thursday 11:00 - 12:20 | |
Wim Vancroonenburg
KU Leuven - FWO | Andrea Grosso, Fabio Salassa | The maximum covering cycle problem | Thursday 13:30 - 14:50 | |
Mathieu Vandenberghe
Ghent University
België | Stijn De Vuyst ; El-Houssaine Aghezzaf ; Herwig Bruneel | Protecting operating room schedules against emergency surgeries: outlook on new stochastic optimization models | Thursday 11:00 - 12:20 | |
Bart Vangerven
Bergische Universität Wuppertal
| Dries R. Goossens, Frits C.R. Spieksma | Coordination and threshold problems in combinatorial auctions | Friday 13:00 - 14:00 | |
Sarah Vanheusden
Hasselt University, research group logistics | | Iterated local search algorithm for solving operational workload imbalances in order picking | Thursday 15:20 - 16:20 | |
Evert Vermeir
KU Leuven | Pieter Vansteenwegen | Local evaluation techniques in bus line planning | Thursday 13:30 - 14:50 | |
Hendrik Vermuyten
KU Leuven, Campus Brussels | Joana Namorado Rosa; Inês Marques; Jeroen Beliën; Ana Barbosa-Póvoa | Staff Scheduling at a Medical Emergency Service: a case study at Instituto Nacional de Emergência Médica | Friday 10:50 - 12:10 | |
Joris Walraevens
Ghent University | Tom Maertens, Sabine Wittevrongel | Giving Priority Access to Freight Vehicles at Signalized Intersections | Thursday 16:30 - 17:10 | |
Toni Wickert
KU Leuven | Federico Mosquera, Pieter Smet, Emmanouil Thanos | Optimizing city-wide vehicle allocation for car sharing | Thursday 13:30 - 14:50 | |
Ertan Yakici
National Defense University, Turkish Naval Academy
Turkey | Mumtaz Karatas, Oktay Yilmaz | A UAV Location and Routing Problem with Synchronization Constraints | Friday 13:00 - 14:00 | |
Xia-jie Yi
Ghent University | Dries Goossens | Combined proactive and reactive strategies for round robin football scheduling | Friday 14:10 - 15:10 | |
Yi-hang Zhu
KU Leuven | Túlio A. M. Toffolo, Wim Vancroonenburg, Greet Vanden Berghe | An analysis of short term objectives for dynamic patient admission scheduling | Friday 10:50 - 12:10 | |
80 talks
