Characteristics And Evolution Machanism Of High-Speed Railway Express Network Based On Complex Network

Chinese high-speed railway express network(CHSREN)has a perfect coverage and a reliability and stable transportation environment,and it can keep normal operation no matter how bad the weather gets to.CHSREN will be one of the important express transportation way,because it has achieved an efficient and regional express logistics network.At the same time,the rational construction of CHSREN has become the focus of social attention,and how to construct a rational,scientific and efficient express network is a key research direction.The network structure and function of CHSREN has its own development rule,and the evolution of network has its own mechanism.On how to completely layout the CHSREN to enhance network's flexibility and reliability,and to improve responsive ability to soared express traffic such as "Double Eleven " or emergencies,this paper studies the complex characteristics of the CHSREN,and simulate the robust performance,and last make a link prediction of CHSREN.And this paper has explored the driving force of the network forming,so as to the safe operation of CHSREN and the scientific management of planning,finally it can provide reference on express transportation scheme.First of all,this paper longitudinally compared the complexity and the development process of Chinese high-speed railway express physical network(CHSREPN)at three periods,and it found that CHSREPN is in regional coordinated developing,and the network tends to be local agglomeration.Hence,the connectivity and convenience of CHSREPN improve continuously.However,for the central cities with leading,radiating and distributing functions,the CHSREPN still has the blind spot.Besides,we established an evaluation index combined with degree and betweenness to rank the importance of the site,which found that changsha,wuhan and zhengzhou are the regional transportation hub of CHSREPN.Consequently,Suggestions for the construction of the CHSREPN is to promote regional coordinated development from the centre to the surrounding circumference.But the connection between the regional construction should be strengthened and the overall connectivity of the network should be ensured.At the same time,we have to improve the construction and protection of important hub sites,and to enhance the network's emergency capability.By analyzing the complex characteristics of high-speed rail express network topology,the article finds that the high-speed rail express network has obvious power-law distribution of degree,edge,and point strength,which proves that high-speed rail express network is a scale-free network while high-speed rail express network is a small world network,the network shows the characteristics of Richman's Club and the heterozygosity of node degrees.Based on the complex characteristics and node connection preference,using point strength as the preference connection mechanism of node connectivity,a network model with growth and preference connection mechanism was constructed.The parameters of the model were analyzed and related parameters were studied.Impact of change on evolution.The simulation results show that the model reconstructs the main structural characteristics of the HSR express network and can reveal the evolution mechanism of the complex structure,providing a theoretical reference for the high-speed rail express delivery optimization layout and delivery route layout.