物流节点最优选址与规模的双层规划模型

物流节点的规划与布局不仅影响着企业的经营活动,而且影响城市的交通运输功能.本文同时考虑物流规划部门及使用者的利益,采用双层规划模型来描述物流节点最优选址与规模问题.上层规划从决策者的角度出发,通过考虑物流节点布局与运输作业、仓储作业成本间的关系,使广义物流总费用最小;下层规划描述使用者的选择行为,对应于最大效用值选择物流节点及对应于交通条件选择运输路线.并设计了该模型的求解算法.

A Bi-level Programming Models in the Optimization for the Position and Scale of Logistics Points

The planning and layout of the logistics points not only influences the business activities of enterprises, but also influences the traffic functions of the city. With the benefits of both users and logistics planners taken into consideration, a Bi-level programming model is proposed in this paper to describe the optimization for the position and scale of logistics points. The upper level problem is to minimize the generalized logistics' total cost from the terms of decision makers by taking account of the relationships of the logistics points layout, the transport cost and the storage cost. The lower level describes the user's choice behavior, corresponding to the biggest utility choice the logistics points, and corresponding to the traffic condition choice transportation route. And this model solution algorithm is designed.