Research On Topological Characteristics And Modeling Of Complex Network Of Liquid Ammonia Road Transportation In Jiangsu Province

With the continuous and stable development of my country’s industrial economy,the scale of the hazardous chemical transportation industry is constantly expanding,and road transportation,as the main method of hazardous chemical transportation,is becoming more and more important.Although the development of road transportation of hazardous chemicals has brought considerable economic benefits,the pollution and potential safety hazards caused by it still cannot be ignored.At present,the relevant national safety production policies and local dangerous goods transportation management regulations have been promulgated one after another,making the research on the road transportation network of dangerous chemicals gradually become a research hotspot for scholars.This paper takes the road transportation network of liquid ammonia in Jiangsu Province as an example,uses the data of transportation hubs and transportation routes of the road transportation network of liquid ammonia to construct a road transportation network model of liquid ammonia in Jiangsu Province,and uses complex network tools to analyze the network structure and its characteristics.The research identifies and analyzes network indicators,such as node degree,degree distribution,shortest path length,clustering coefficient and centrality indicators,and analyzes the correlation between the indicators to understand the topological characteristics of the liquid ammonia road transportation network.This paper divides the road transportation network of liquid ammonia in Jiangsu Province into 5 partial networks,and compares and analyzes the index data that affect the road transportation network of liquid ammonia.After analysis and research,the following conclusions are drawn.First,the cumulative degree distribution of the liquid ammonia road transportation network obeys the exponential distribution,and the network has typical heterogeneity distribution characteristics.Second,the average shortest path of the liquid ammonia road transportation network is 0.964,and the clustering coefficient is 0.279.Therefore,the liquid ammonia road transportation network has small-world attributes.The cohesion and transitivity of the network are different from random networks and are better than those of the same scale.Random network.Third,by analyzing the local network,it is found that the distribution of nodes in the liquid ammonia road transportation network is uneven,and the small-world attributes of some local networks are not obvious.Under the same conditions or the same scale,the average road section length of the network can be reduced and the scale of the local network can be expanded.Measures such as improving the small-world attributes of the network.Finally,based on the analysis results of network topology characteristics and the actual situation in my country,this article puts forward corresponding optimization measures and suggestions.The optimization plan can also provide a theoretical basis for the planning of transportation networks of relevant dangerous goods transportation companies or the management decisions of transportation authorities.