Multi-hop vehicle-to-vehicle communication is useful for supporting many vehicular applications that provide drivers with safety and convenience. Developing multi-hop communication in vehicular ad hoc networks (VANET) is a challenging problem due to the rapidly changing topology and frequent network disconnections, which cause failure or inefficiency in traditional ad hoc routing protocols. We ...

Mobile ad hoc network is a self-directed structure of mobile nodes connected by wireless links. All nodes operate not only as an end system, but also as work as a router to forward the packets. Ad hoc wireless networks are characterized by multi-hop wireless connectivity, infrastructure less and habitually changing topology. It may be necessary for one mobile node to schedule other hosts for fo...

This paper considers a variation of the Elementary Constrained Shortest Path Problem in which nodes are separated into subsets and a feasible path through the network may visit at most one node from each subset. We refer to this problem as the Multiple Choice Elementary Constrained Shortest Path Problem (MC-ECSPP). The MC-ECSPP arises as a subproblem in branch-and-price approaches for variation...

Let P be a set of n points in the plane and S a set of non-crossing line segments between vertices in P , called constraints. Two vertices are visible if the straight line segment connecting them does not properly intersect any constraints. The constrained θm-graph is constructed by partitioning the plane around each vertex into m disjoint cones, each with aperture θ = 2π/m, and adding an edge ...

In this paper, we study an integrated logistic system where the optimal location of depots and vehicles routing are considered simultaneously. This paper presents a new mathematical model for a multi-objective capacitated location-routing problem with a new set of objectives consisting of the summation of economic costs, summation of social risks and demand satisfaction score. A new multi-objec...

delivering perishable products to customers as soon as possible and with the minimum cost has been always a challenge for producers and has been emphasized over recent years due to the global market becoming more competitive. in this paper a multi-objective mix integer non-linear programming model is proposed to maximize both profits of a distributer and the total freshness of the several produ...