Analyses Of Modeling And Simulation Of Cold Chain Logistics Scale-free Network Based On Improved BA Model

With the continuous improvement of the quality of life if the Chinese people,the increase of cold chain logistics demand and supply,and the continuous introduction of the government's supporting policies,cold chain logistics will be developed better.However,Lacking of overall planning,China's cold chain logistics links in all aspects of low efficiency.In this dissertation,the cold chain logistics network model is established.Research on cold chain logistics network based on scale-free network theory.Firstly,the characteristics of cold chain logistics network are analyzed.From the network point of view,the structure of the cold chain logistics network is analyzed,including nodes and connectivity of cold chain logistics network.Based on the scale-free BA model,the BA model is improved by combining the three aspects of the establishment process of cold chain logistics network,the point to point connection and the adjustment and change of point edges.Secondly,the characteristics of cold chain logistics network are analyzed based on the improved BA model.Only in the original node degree as the basis of merit index on the introduction of factors,We introduce the influence factors Ci to establish a new preferred probability.And according to the proportion ? of service customers into lost customers,to delete the proportional connected edges in the network by the anti preferred probability.The characteristic of the model is still in line with the characteristics of BA model by analysis,and the model of power-law index accords with the reality of network power index between 1 to 3,and the impact factor and delete edge proportion coefficient will affect the network scale and the power index.In addition,the application of cold chain logistics scale-free network is analyzed.The cold chain logistics network of Z company is generated systematically.Through the analysis of the network degree distribution,it is concluded that the degree distribution of the cold chain logistics network of Z company is in line with the characteristics of scale-free network.The characteristic parameters of cold chain logistics network of company Z are analyzed.Finally,The robustness of cold chain logistics network of company Z is analyzed,the simulation experiment of the cold chain logistics network of company Z through random attack and attack the two strategies,results show that the deliberate attack on the destruction of the network is strong,and the core nodes in the network failure will lead to the collapse of the network.The corresponding suggestions are given,through the analysis of the experimental results.