Research On Cold Chain Logistics Enterprise Network Model And Risk Contagion Based On Complex Network

With the rapid development of my country’s cold chain food industry,the cold chain logistics market has gradually expanded,and cold chain logistics has entered a new stage of development.However,due to the late development of my country’s cold chain,the level of cold chain technology is relatively backward,and because consumers are concerned about cold chain logistics highly required transportation quality,coupled with the influence of factors such as the external environment and transportation level,make the cold chain prone to risks such as "broken chain" and damage to goods.The entire cold chain supply chain in my country continues to expand,and the cold chain logistics network is gradually changing from a chain type to a complex network type.Under this background,risk contagion will be very rapid.Therefore,in-depth study of the cold chain logistics network and construction of a cold chain logistics enterprise network model that conforms to the characteristics of reality,on this basis,explore the mechanism of cold chain risk transmission,and solve the problem of risk transmission,which is a problem that needs to be studied in depth in academia.First of all,based on the complex network theory and the BA scale-free network model,this thesis constructs a cold chain logistics enterprise network model.By analyzing the components of the cold chain supply chain,it abstracts the cold chain suppliers,cold chain logistics centers,and cold chain logistics centers.The three-level cold chain logistics enterprise network model of chain distributors,and the statistical characteristics of its network are verified and analyzed,which proves that the constructed cold chain logistics enterprise network model has the scale-free characteristics of a real network.Secondly,combined with the SIR virus propagation model(Susceptible Infected Recovered Model),a cold chain risk infection model was constructed.Without considering the type of risk,by adjusting the parameters in the risk infection model,the number of initial infection nodes,and the introduction of "early warning" conditions,use MATLAB software to simulate and analyze the contagion of risks in the constructed cold chain logistics enterprise network model,and explore the contagion mechanism of cold chain risks.Finally,the verification and analysis of the risk contagion of specific A cold chain logistics companies are carried out,and the contagion of different risk types and multi-source risks in A cold chain logistics companies are explored,and then countermeasures and suggestions for enterprises to deal with risk contagion are put forward to reduce the impact of risks on the cold chain system.Based on the application of complex networks to construct a cold chain logistics enterprise network model,the SIR model is applied to cold chain risk contagion.The study found that cold chain risk spreads faster at the initial moment,the influencing factors of risk infection include the size of the average degree of nodes,the number of initial infected nodes,the type of risk(different types of risk infection rates,different recovery rates make the speed of risk infection different),and early warning strategies.In this regard,it is proposed to strengthen risk monitoring.Focus on controlling node companies with large average degrees,focusing on prevention and control of highly infectious risk types,and establishing early warning mechanisms and other corporate response strategies to enhance the ability of my country’s cold chain logistics companies to respond to risks and promote the healthy development of my country’s cold chain logistics industry.