陆运快递网络的复杂结构特性及演化模型

Complex Structural Properties and Evolution Model of the Ground Express Network

陆运快递网络是快递企业包裹投递的基础,对其投递业务的完成具有重要影响。借鉴复杂网络理论研究方法,对陆运快递网络的复杂结构特性进行度量和分析,发现陆运快递网络是一个小世界网络,其度分布形式为无标度分布,存在明显地与地理位置相关的社区结构,并表现出富人俱乐部现象和节点度异配特性。根据这些结构特性,在BA无标度网络模型的增长和优先连接机制中,引入边的增长机制和节点城市的地理位置因素,构建陆运快递网络演化模型。仿真结果表明,该模型重构了陆运快递网络的主要结构特性,从理论层面揭示了陆运快递网络的生成演化机理,为快递企业在实践中构建地面投递路线提供理论依据。

Ground express network is the basis of the parcel delivery of an express enterprise,and has important influences on the fulfillment of delivery services.From the perspective of complex network theory,the structural properties of a ground express network are measured and analyzed.The results show that,the ground delivery network is a small-world network,its degree distribution exhibits scalefree property,it has significant community structure related to the geographic location of relevant cities,and it shows rich club phenomenon and the disassortative behavior of node degrees.Based on these structural properties,an evolving network model is proposed on the basis of the growth and preference attachment mechanism of BA scale-free network model.The model introduces the edge growth mechanism and the geographic factor of node cities.Simulation results indicate that the model reconstructs the main structural properties of the ground express network thus reveals the evolution mechanism of ground delivery network from a theoretical point of view,and provides theoretical basis for express enterprises to construct ground delivery network in practice.