9 Abstract In rapidly growing urban areas, it is deemed vital to expand (or contract) 10 an existing network of public facilities to meet anticipated changes in the level of 11 demand. We present a multi-period capacitated median model for school network 12 facility location planning that minimizes transportation costs, while functional costs 13 are subject to a budget constraint. The proposed ...

Service network design involves determination of the most cost-effective transportation network and service characteristics subject to various constraints. Good progress has been made in developing metaheuristic approaches that can compete or even outperform some commercial software packages (Ghamlouche et al 2004; Pedersen et al 2009). However, since most of these metaheuristic methods involve...

in this paper, we develop a freight transportation model for railway network considering hazmat transportation issue. in the transportation system considered, different customers can request for carrying hazmat and non- hazmat boxes. it is assumed that the sequence of the trains in the network is known. the objective is assigning the non-hazmat boxes and hazmat boxes to wagons of the trains so ...

This paper addresses a multi-period capacitated closed-loop supply chain (CLSC) network design problem subject to uncertainties in the demands and returns as well as the potential carbon emission regulations. Two promising regulatory policy settings are considered: namely, (a) a carbon cap and trade system, or (b) a tax on the amount of carbon emissions. A traditional CLSC network design model ...

The paper discusses the option of using capacitated vehicle routing problem with capacity limitation nodes in water transportation. is used to design circular routes for vehicles different carriers, each which services selected transportation network. goal where not exceeded and value objective function minimal. limited given by number that can be operated at a particular node any time. allows ...

We study the capacitated k-facility location problem, in which we are given a set of clients with demands, a set of facilities with capacities and a constant number k. It costs fi to open facility i, and cij for facility i to serve one unit of demand from client j. The objective is to open at most k facilities serving all the demands and satisfying the capacity constraints while minimizing the ...

Combinatorial optimization problems are by nature very difficult to solve, and the Capacitated Minimum Spanning Tree problem is one such problem. Much work has been done in the management sciences to develop heuristic solution procedures that suboptimally solve large instances of the Capacitated Minimum Spanning Tree problem in a reasonable amount of time. The Capacitated Minimum Spanning Tree ...

In this paper, an integrated production and transportation scheduling model is proposed. This model is based on multi-item capacitated lot sizing and facility location type models. The objective of the integrated model is to minimize the total production and transportation cost. The integrated model is solved by Lagrangian decomposition method and the decomposed two sub-problems can be solved b...

nowadays, the environmental impact of transportation project and, especially air pollution impacts, are major concerns in evaluating transportation projects. based on this concern, beside definition of traditional objective functions like total travel time and total investment cost, different type of environmental related function is considered as objective function in urban network design. in...