An exact algorithm is proposed for minimum sum-of-squares nonhierarchical clustering, i.e., for partitioning a given set of points from Euclidean <i>m</i>-s...

The problem of assigning locomotives and cars to trains is a complex task for most railways. In this paper, we propose a multi-commodity network flow based ...

Given a graph <i>G</i> with <i>n</i> vertices and stability number <img src="alpha.gif" align=bottom>(<i>G</i>), Turán's theorem gives a lower bound on the ...

We study empirically the topology of the local minima of the 3-SAT problem. In particular, we analyze the size of the plateaus, their altitude, their attrac...

The problem of assigning locomotives to trains consists of selecting the types and number of engines that minimize the fixed and operational locomotive cost...

An important aspect of railway planning concerns the distribution of locomotives and cars in the network and their assignment to the scheduled trains. In th...

Dans le cadre du projet de recherche franco-québécois "COPRAIC": COnception et PRoduction Accélérées dans un contexte d'Ingénierie Concourante, une enquête ...

We present branch and bound algorithms that enumerate in finite time all Nash equilibria for strategic and sequence form bimatrix games. For each forms, th...

This paper considers the placement of components onto printed circuit boards (PCB's) using surface mount technology. Multiple automatic placement machines, ...

Cet article décrit un problème d'horaires mensuels personnalisés pour les membres d'équipage (pilotes et officiers) en transport aérien. Ce problème consist...

Dans le cadre du projet de recherche franco-québécois "COPRAIC": COnception et PRoduction Accélérées dans un contexte de l'Ingénierie Concourante, une enquê...

We consider Nash equilibria as correlated equilibria and apply polyhedral theory to study extreme Nash equilibrium properties. We obtain an alternate proof ...

This paper considers the shortest path problem with waiting costs (SPWC) as an extension of the shortest path problem with time windows. The problem consis...

In recent years, there have been several important algorithmic developments for the traveling salesman problem and the vehicle routing problem. These incl...

One of the many problems faced by rail transportation companies is to optimize the utilization of the available stock of locomotives and cars. In this paper...

The aim of this paper is to present a survey of recent optimization models for the most commonly studied rail transportation problems. For each group of pro...

In the last 15 years, considerable efforts have been placed on integrating product and process design. This integration can improve product quality, reduce...

An FMS environment requires a flexible and adaptable material handling system. Automated guided vehicles (AGV) provide such a system. One of the component...

The paper is concerned with conflict and coordination in a two-member channel of distribution. We propose a differential game model that includes carry-ove...

If it is assumed that the final product of bromination of C₆₀ will obey two rules, (i) that no two <i>sp</i>³ carbons may be adjacent,...