基于断裂点模型的物流节点空间吸引范围划分研究

Study on Logistics Nodes Spatial Attracting Scope Partition Based on Breakpoint Model

基于断裂点模型和泰森多边形理论,研究物流节点空间吸引范围划分问题。根据物流节点的特性,考虑物流节点的区位条件和规模条件,采用拉开档次法对断裂点模型中的"区位质量"和"规模质量"进行重新构建,并在方法中加入了主观约束条件。然后根据物流节点的综合质量来确定断裂点位置和各节点吸引范围的划分顺序,结合断裂点位置和泰森多边形理论区域划分方法得到物流节点区域划分图。最后以重庆主城区及周边11区县的统计数据和主城区5大冷链物流节点的实际数据为基础,研究确定各冷链物流节点的空间吸引范围。实例验证表明,该方法确定的节点划分范围合理,且与物流节点的实际服务范围具有较高的吻合度。

Based on the breakpoint model and the theory of Thiessen polygon,the spatial attracting scope partition problem of logistics nodes is studied. According to the characteristics of logistics nodes,considering the locational conditions and the scale conditions,the ＂location quality ＂ and ＂scale quality ＂ in the breakpoint model are rebuilt by using scatter degree method,and the subjective constraints are added. Then,the location of breaking point and the partition order of nodes＇ attracting scope are determined according to the logistics nodes＇ comprehensive quality,and the region partition diagram of logistics nodes is obtained based on the breakpoint location and Thiessen polygon region partition method. Finally,on the basis of the statistical data of Chongqing urban area and its surrounding 11 counties and the actual data of the main 5 cold-chain logistics nodes,the spatial attracting scopes of cold chain logistics nodes are further studied and determined.The result of an experimental study shows that the partition scope of nodes is reasonable based on the proposed method,it matches the actual service scope of logistics nodes well.