Analysis And Optimization Of Complex Topological Structure Of Y Company's Cold Chain Logistics Network

With the continuous development of modern society and the gradual improvement of people's living standards,the quality of fresh agricultural products has become the main factor affecting the purchase.However,compared with developed countries,the cold chain logistics industry in China started relatively late,and there are still some problems in the cold chain logistics system,such as blocked commodity circulation,blocked information transmission,imperfect cold chain infrastructure and so on.Focusing on how to verify that the cold chain logistics network conforms to the complex network characteristics and how to optimize the cold chain logistics network,this paper will analyze the complex topology characteristics of the cold chain logistics network,and put forward the cold chain logistics network optimization model,in order to verify the complex characteristics of the enterprise cold chain logistics network and provide reference for the optimization of the enterprise cold chain logistics network.This paper combs the definition of cold chain logistics and cold chain logistics network,expounds the current situation of cold chain logistics industry and cold chain logistics network.By combing the process and components of cold chain logistics network,this paper describes the structure of cold chain logistics network,and analyzes the characteristics of cold chain logistics network.The process of data acquisition and processing of Y company cold chain logistics network is described.Based on the complex network theory,combing the evaluation index of complex characteristics,constructing the node importance evaluation model to calculate the importance of network nodes.Based on the cold chain logistics data of Y company,the complex characteristics of the cold chain logistics network of the enterprise are verified.It is found that the cold chain logistics network of the enterprise shows certain scalefree characteristics and small world characteristics.The network has clustering characteristics and obvious community structure,and the node centrality index shows certain correlation.This paper analyzes the calculation results of network node importance,and puts forward corresponding suggestions for Y company's cold chain logistics network planning and management.The distribution efficiency and network connection cost between network nodes are related to the structure of cold chain logistics network.Changing the structure of cold chain logistics network will also affect the distribution efficiency and cost.In order to optimize the cold chain logistics network structure of the enterprise,the optimization model of cold chain logistics distribution network is established by keeping the distribution time unchanged and minimizing the network connection cost.The simulation results show that the optimized distribution time of the cold chain logistics network is less than the initial network distribution time;The total connection cost of the optimized network is between the initial network and the fully connected network;The vehicle speed or node delay in cold chain logistics network will affect the delivery timeliness;There is a negative correlation between network delivery time and network connection cost;After optimization,the change trend of the number of connected edges and the average node degree of the network is consistent,and the network efficiency is improved to a certain extent.The calculation results show that the optimization method based on keeping the distribution time unchanged and reducing the connection cost can achieve a certain balance between the network distribution time and the total network connection cost.On the basis of this research,this paper puts forward some suggestions on the optimization of cold chain logistics network for Y company.