连续与离散相结合的单一物流中心选址方法

以单一物流中心优化选址问题为研究对象,通过对连续型选址和离散型选址等常规选址方法分析与评价,提出连续与离散相结合的单一物流中心选址方法．首先,建立了既包含地价、交通阻抗影响,又能体现由于竞争关系致使物流服务需求量在物流中心之间合理分配的连续型选址模型．模型以物流服务需求量所产生的净效益最大化为目标函数,给出了采用遗传算法求解的方法．其次,根据用地性质、物流中心用地面积要求、自然条件及交通环境等因素,确定备选点集合．最后,基于贴近度原理,将由模型求解出的理论最优建址点与备选点进行比较,最终确定新建物流中心建址地点．

Study on location method of single logistics center by integrating continuous and discrete methods

The objective of this paper is to optimize the location problem of single logistics center.Through a- nalysis and appraisement of continuous methods and discrete methods,the method of integrating the two is put forward.Firstly,the continuous model is brought forward that covers such factors as the price of soil,the im- pedance of traffic and the distribution of logistics service demand in different logistics centers that is caused by competition.The objective function of the model is the maximum net benefits which are brought by service de- mand and approaches for settling the model are given by adopting genetic algorithms.Secondly,the spare spots aggregate is confirmed according to the property of soil,the area requirement of logistics center,natural and traffic conditions.Finally,based on the theory of close degree,the academic optimization key is compared with spare spots so as to confirm the final spot where the logistics center is to be built.