| The New Western Land-sea Corridor region has become a major economic channel with dual circulation both domestically and internationally,opening up more convenient and economic sea access for provinces and cities such as Guangxi,Yunnan,Guizhou,Sichuan,and the vast southwest,central south,and northwest regions,which is conducive to promoting the formation of a new pattern in the western development and promoting high-quality economic development in the western region.This article analyzes the current structure of the logistics network of the channel to study its current structural characteristics;By analyzing the evolution of channel logistics network structure,we can study its development rules and recognize its essence;By analyzing and optimizing the structure of the channel logistics network,it is possible to study the degree of integration of the logistics industry chain across the entire region.Therefore,this article regards the urban logistics network as a complex system,and conducts a comprehensive analysis and research on the model construction,complex characteristics,evolution process,evolution rules,and evolution stages of the urban logistics network structure from the perspective of economics and social network analysis theory.The main research content and results of this article are as follows:(1)Evolutionary analysis of urban logistics competitiveness based on channel networks.Establish an evaluation index system for logistics development,and quantify the comprehensive logistics competitiveness of a city based on the level of logistics supply and demand and logistics informatization.Select the logistics development index data of 45 cities along the New Western Land-sea Corridor in 2017,2019,and 2021,calculate the urban logistics competitiveness in each year,and conduct an evolutionary analysis.The results show that the level of logistics development in 2017,2019,and2021 has shown an upward trend,and the level of logistics development in cities along the main corridor has been improved,forming a northern logistics cluster with Chengdu Chongqing as the core,a central logistics cluster with Guiyang Zunyi as the core,and a southern logistics cluster with Nanning Liuzhou as the core.(2)Analysis of complex network characteristics of channel logistics.Based on the comprehensive development level index of urban logistics,a modified gravity model is used to construct the logistics network structure of a city.The complex network characteristics of channel logistics are analyzed from such indicators as logistics network node centrality,logistics network density,logistics network node centrality,proximity centrality,and the core edge of the logistics network.The results show that Chengdu,Chongqing,Guiyang,and Nanning all have a certain degree of attraction to surrounding cities,but the logistics connections of the main channels of the new land sea corridor in the west vary greatly and are unevenly distributed.At the same time,Chengdu,Chongqing,Guiyang,Nanning,Zunyi,and Liuzhou occupy a core position in the logistics network structure,while Yibin,Leshan,Neijiang,and Liupanshui are in a secondary core position,assuming the cargo collection and distribution functions of the new land and sea corridor in the west.(3)Analysis of factors influencing the network structure of channel logistics.Build a QAP analysis model,and analyze the variable factors that affect the structural characteristics of the logistics spatial network of the new land and sea corridor in the west through QAP correlation analysis and QAP regression analysis.The results show that the factors affecting the logistics spatial network structure of the new land sea corridor in the western region include economic scale,spatial distance,industrial structure,and informatization level.Among them,spatial distance is positively correlated with the logistics spatial network structure,while economic scale,industrial structure,and informatization level are negatively correlated with the logistics spatial network structure. |
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