Study on the structure and driving mechanism of county logistics network in Yunnan Province from the perspective of transportation flow

Based on the data of highway transportation flow in Yunnan Province, this paper constructed a county logistics network through traffic volume weighting, analyzed the spatial structure characteristics of county logistics by using social network analysis method and GIS spatial region, explored the influencing factors of network development from three dimensions of point, edge and network, and studied the network driving mechanism by using spatial gravity model. The results show that: (1) The county logistics network in Yunnan Province has the characteristics of small world network. The degree distribution of nodes in the network is not balanced. A few nodes with high degree value play a core role in the logistics network. The important edges of the network are mainly concentrated in the central region of Yunnan Province. The clustering coefficient is high and the network aggregation is good. (2) The network structure is divided into core distribution type, potential difference distribution type, adjacent distribution type, with core distribution type as the typical structure; (3) Regional GDP and resident population are the most important factors affecting the formation of important nodes and the overall network. (4) This network will develop into a logistics network with multiple central nodes, multiple important network edges and a relatively balanced structure along with the growth of factors such as the economy and population. The research results have certain practical significance for revealing logistics patterns and promoting the coordinated development of regions.