Analysis And Optimization Of Regional Logistics Network Structure

The analysis of regional logistics network structure from the perspective of systems is the basic research of regional logistics.However,we find that there is still a lack of structural research based on the macro perspective for regional logistics by collecting relevant data.Therefore,according to the relevant research of regional economy and regional logistics,it is considered that there are some nodes which can choose their own strong performance to connect logistics nodes.According to the relevant research of regional logistics,this paper establishes the regional logistics network model of Jiangsu,Zhejiang and Shanghai,analyzes the structural characteristics of regional logistics network from the perspective of system engineering and network theory.Discusses the robustness of regional logistics network under random attack and intentional attack.On this basis,a comprehensive robust optimization model is established to discuss how to maximize the robustness of the regional logistics network under the limited cost.The main research work and content of this paper are as follows:(1)Construction of regional logistics weighted network model in Jiangsu,Zhejiang and Shanghai.According to the characteristics of regional economy and logistics activities,this paper considers that thelogistics node has the ability of choosing the best one when it chooses the node with which it has new logistics connection.Based on the above hypothesis and gravity model,the logistics connection force index between nodes is constructed and introduced into the regional logistics network model.Taking Jiangsu,Zhejiang and Shanghai as an example,the county-level cities are abstracted as a single logistics node,the logistics links between nodes are abstracted as logistics lines,and the logistics links between nodes are taken as logistics weights.The regional logistics weighted network model of Jiangsu,Zhejiang and Shanghai is established and visualized through UCINET software.(2)Analysis on the structural characteristics of regional logistics weighted network model in Jiangsu,Zhejiang and Shanghai.We analyze the overall network structure characteristics of the regional logistics weighted network of Jiangsu,Zhejiang and Shanghai,discuss the capabilities of different nodes through the central indicators,finds out the nodes with strong logistics capabilities in the current situation,and discusses the community structure in the regional logistics network;(3)Robustness analysis and optimization of regional logistics weighted network model in Jiangsu,Zhejiang and Shanghai.The paper analyzes the response of the regional logistics weighted networks of Jiangsu,Zhejiang and Shanghai under random attacks and deliberate attacks respectively.Firstly,we conclude that the regional logisticsnetworks have scale-free network characteristics,which is robustness under random attacks,and vulnerability under deliberate attacks.Secondly,we discuss how to optimize the comprehensive robustness of the regional logistics network to the greatest extent under the limited cost.