Port logistics Collecting and Distributing network is the transportation mode of collecting and distributing goods and to provide cargo transportation services. Collecting and Distributing network with high capacities and no obstruct can increase the port throughput capacity directly over that region, speed up loading&discharge on the dock and turnover of ship, and shorten circulating time. With the transform of port from transport hub, loading and unloading service center, logistics center into a node of Supply Chain, port is increasingly related to Supply Chain. The choice of transfer nodes by port would make the structure of Supply Chain change, thus affects the user’s path selection strategy. At the same time, users’path selection strategy can make an effect on ports’ transfer node selection strategy. Therefore, it is necessary to analysis and optimize Port Logistics Collecting and Distributing network under Supply Chain environment.According to the construction of transfer nodes and path choice of users in Port Logistics Collecting and Distributing network, this paper summarizes the concept of Supply Chain, Port of Supply Chain, Collecting and Distributing network of port etc. It also describes the effects that ports’ transfer node selection strategy and users’ path selection strategy have made on structure of Collecting and Distributing network under the supply chain environment. In order to reflect the interaction of users’ strategy of path selection and ports’ strategy of transfer node selection, this paper use the idea of bi-level programming to build optimization model under Supply Chain environments and gives a related numerical example. The main purpose of optimization is to search for the best transport network, coordinate transportation proportion and play the advantage of railway transportation by layout of transfer nodes and users’ selection of path. In order to reflect the influence traffic way capacity have on Collecting and Distributing Network, this paper removes transportation capacity constraints at the basis of numerical example and compares this results to original model’ results, and then gains the status of Port Collecting and Distributing network development when capacity of traffic way changes in the future. |