Le secteur de la presse en France rencontre de plus en plus de difficultés : baisse de lecteurs, concurrence de l'Internet et de la presse gratuite. Dans ce contexte, tout messager de presse – tel le groupe Nouvelles Messageries de la Presse Parisienne ici traité – voit le taux de...

Soit G=(V,E) un graphe non-orienté et 2-arêtes connexe. Chaque arête et sommet de G est muni d'un poids. Le problème du sous-graphe 2-arêtes connexe de poids minimum dans G (2ECSP), est de trouver un sous-graphe 2-arêtes connexe de G tel que la somme des poids sur ses sommets et ses arête...

In this thesis, we are interested in collective decision-making. The objective is to find a tradeoff solution for problems that are evaluated by multiple points of view. We consider problems having a matroid structure. Matroid theory is significant in combinatorial optimization, it helped to...

The success of a logistics system may depend on the decisions of the depot locations and vehicle routings. The location routing problem (LRP) simultaneously tackles both location and routing decisions to minimize the total system cost. In this paper a multiple ant colony optimization algorithm...

This paper examines network design where OD demand is not known a priori, but is the subject of responses in household or user itinerary choices to infrastructure improvements. Using simple examples, we show that falsely assuming that household itineraries are not elastic can result in a lack in...

It is observed that the separated design of location for depots and routing for servicing customers often reach a suboptimal solution. So, solving location and routing problem simultaneously could achieve better results. In this paper, waste collection problem is considered with regard to...

This study presents the Location Routing Problem (LRP) for which we have created a model for the integration of locating facilities and vehicle routing decisions to solve the problem. The case study is the Palm Oil Collection Center, which is also important for the supply chain system. A...

This paper aims to solve the location and routing problem (LRP) in the agricultural sector with the objective function of fuel cost minimization. Many farmers may have problems when transporting and selling products because of high costs and unfair prices. The proper location of standardized...