基于改进SLP的铁路物流中心功能区布局方法

根据铁路物流中心业务流程及各业务间的关联性,将物流中心划分为基本功能、增值功能和辅助功能三大类12个功能区;通过对影响功能区布局因素的定量化分析,用数学方法对系统布置规划(SLP)方法进行改进;按照改进的SLP方法,根据物流中心各功能区之间物流相互关系和非物流相互关系的密切程度,建立功能区综合相互关系表;据此在铁路装卸线位置固定、各功能区布局不相互重叠、各功能区的边界不得超出物流中心规划区域、物流中心出入口只能设置在物流中心规划区域的边界上等约束条件下,构建总搬运费用最小和总的综合关系最大的目标函数,然后经归一化处理得到功能区布局方案最优的单目标函数,运用遗传算法求解,从而得到科学、合理的功能区布局方案。算例验证了该方法的合理性和有效性。

Layout Method for the Functional Area of Railway Logistics Center Based on the Improved Systematic Layout Planning

According to the business process of railway logistics center and the relationship between each business,the logistics center is divided into 12 functional areas according to three categories of functions,namely,basic function,value-added function and auxiliary function.By quantitatively analyzing the influencing factors of the functional area layout,mathematical method is used to improve Systematic Layout Planning(SLP) method.With the improved SLP,and based on the close degree of the logistics and non-logistics relationships among each functional area in logistics center,the comprehensive relationship table of functional area is set up.Accordingly,under the following constraints,such as,railway loading and unloading line in fixed position,each functional area layout not overlapping,each functional area may not exceed the boundary of planned area in the logistics center,the logistics center gateway can only be at the boundary of the planned area in the logistics center and so on,the objective function is constructed with the minimum total handling cost and the maximum comprehensive relationship.Then the optimal single objective function of the functional area layout is got by the normalized processing.Genetic algorithm is used to work out the solution,and a scientific and reasonable layout scheme for functional area is obtained.Example has validated that the method is reasonable and effective.