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In traveling salesman problem, transportation cost is determined by not only distance, but also the cargo weight on the way. Influence of cargo weight on transportation cost is analyzed, and a weighted traveling salesman problem (WTSP) model is given. In WTSP model, cities with larger demands should have priority to be served for minimal cost. A discrete particle swarm optimization algorithm named...
In this paper, Large-Scale Vehicle Routing Problem in Real Traffic Condition (LSVRPRTC) is studied. In this kind of problem the client demand and the presence of the client are assumed to certain. The service vehicle returns to the depot whenever its capacity is attained or exceeded, and it is resumed that its collections along the planned route. After describing the preliminaries, a mathematical...
Hub-and-spoke transportation network can help Less-Than-TruckLoad carriers lower their total costs by consolidation transportation. In many cases, hybrid hub-and-spoke systems with some direct routes can be more cost-effective than pure ones. By means of analyzing a real case, this paper develops new mathematical models for a hybrid hub-and-spoke system, solving them using genetic algorithm with some...
The road freight enterprises face the severe questions of the higher empty-loading ratio of vehicles. How to improve their managing level, to organize and schedule vehicle effectively, to low the running cost of the enterprises and strengthen core advantages has been an urge problem to governors of road transport. The paper makes use of dynamic programming theory, and designs relevant dynamic scheduling...
Based on GIS as the main carrier, our real time computer simulation system of urban logistics distribution vehicle routing optimization precisely measures and marks the information of distribution site, providing true and available information for routing optimization, performing low cost and highly efficient operation on vehicle scheduling by the distribution center through optimization algorithm...
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