关键词: 物流网络, 演化算法, 流量分配, 广义费用函数

Abstract: Based on the mutual effect of urban spatial structure and logistics network, an urban logistics network evolution model and algorithm to reveal the logistics network evolution laws are proposed according to the macroscopic mechanism and L-OD four-stage method. In the short term, travel time and fuel cost are taken into account to formulate generalized logistics cost function. Furthermore, a flow distribution model is established. In the long run, betweenness centrality and economic relation intensity are utilized to describe the evolutionary mechanism and algorithm. Simulation results show that with the logistics network evolving, the network total cost increases, but network unit cost reduces periodically. Hierarchy of logistics corridor emerges and turns clearer, and logistics network evolves to a more orderly structure with improving performance.

Key words: logistics network, evolution algorithm, flow distribution, generalized cost function