Community detection in networks based on modularity maximization is currently done with hierarchical divisive or agglomerative as well as with partitioning h...

Heuristics are widely applied to modularity maximization models for the identification of communities in complex networks. We present an approach to be appli...

In this paper we study a variant of the Capacitated Team Orienteering Problem (CTOP), that is the problem where a fleet of vehicles, each with a constraint...

We present a new column generation algorithm for the determination of a classifier in the two classes LAD (Logical Analysis of Data) model. Unlike existing a...

We study extremal graphs for the extremal values of the second largest <i>Q</i>-eigenvalue of a connected graph. We first characterize all simple connected g...

Le problème d'affectation d'activités et de tâches consiste à affecter des activités interruptibles et des tâches non interruptibles à des quarts de travai...

The production-routing problem can be seen as a combination of two well known combinatorial optimization problems: the lotsizing and the vehicle routing prob...

La plupart des compagnies distribuant de l’huile de chauffage résolvent des problèmes de tournées de véhicules presque quotidiennement. Ces problèmes peuven...

In the rail industry, profit maximization relies heavily on the integration of logistics activities with an improved management of revenues. The operational ...

In this paper we study the capacitated team orienteering problem where split deliveries are allowed. A set of potential customers is given, each associated w...

Normalized cut is one of the most popular graph clustering criteria. The main approaches proposed for its resolution are spectral clustering methods (e.g. [1...

In this paper, we generalize the Asymmetric Representatives Formulation, which was first introduced by Campêlo et al. (2008) for the Node Coloring Problem. ...

The integrated crew scheduling (ICS) problem consists of determining, for a set of available crew members, least-cost schedules that cover all flights and re...

The multi-activity assignment problem consists of assigning interruptible activities to given work shifts so as to match as much as possible for each activit...

The purpose of this paper is to present and solve a new, important planning problem faced by many shipping companies dealing with the transport of bulk produ...

The vehicle routing problem with time windows VRPTW consists of finding least-cost vehicle routes to service given customers exactly once each while satisfyi...

Dans cet article, on raconte l'histoire de l'équipe GENCOL et du logiciel d'optimisation du même nom. C'est avant tout le récit d'une collaboration qui se po...

Traditionally, the airline crew scheduling problem has been decomposed into a crew pairing and a crew assignment problem that are solved sequentially. The f...

La confection de calendriers sportifs dans le milieu scolaire québécois est une tâche complexe à laquelle la Fédération Québécoise du Sport Étudiant (FQSE) d...

In several companies such as large retail stores, the employees perform different activities (e.g., cashier or clerk in a specific department) to respond to ...