| In recent years,China’s transportation network has maintained a rapid development trend,and the modern transportation network has become a reality.China is moving forward towards the goal of a powerful country in transportation.The inland container transportation network is one of the components of the transportation network,and the improvement and development of the network system has always been the focus of research.Since the founding of the People’s Republic of China,the Northeast has been my country’s heavy industry base,and its development has always attracted attention,and the inland container transportation network in the Northeast also occupies an important position in the country.Therefore,it is very important to evaluate and optimize the inland container transportation network,strengthen the construction of the network system,and improve the overall service level of the network in the Northeast.Firstly,this article uses freight demand cities,container ports and container yards as nodes,and uses container transportation channels as the edge to describe the inland container transportation network in Northeast China.It analyzes the relevant statistical characteristics of unweighted and weighted networks,and finds that nodes with a high degree value account for the minority,nodes with a low degree value account for the majority in the network,the network exhibits a certain agglomeration effect and the weighted network has a smaller degree of agglomeration compared with an unweighted network.Secondly,on the basis of analyzing the characteristics of network evolution,factors such as freight volume,unit operating cost and distance are introduced to form node attraction,and industrial agglomeration is used as an influencing factor affecting the evolution of network edge rights,and a network evolution model is constructed.Thirdly,this paper uses different parameter combinations to generate different evolution results,explores the role of different influencing factors in network evolution,and finds that when the unit cost of nodes in the network is lower,the connections between nodes are closer,and the network appears more obvious agglomeration effect.Then,according to the five characteristic parameters of average degree value,average clustering coefficient,average path length,node strength and node betweenness,the actual network and the final evolution result are compared.After analysis,it is found that:(1)The average degree of the actual network is too low,the connection between nodes is not close enough;(2)The average clustering coefficient is too low,and the agglomeration effect is not obvious;(3)The average path length is slightly higher,and the network connectivity is not high;(4)No significant change in node strength ranking,the status of the hub node has not changed significantly;(5)The betweenness of a small number of nodes remains at a high value,and the transfer effect is obvious.Then,construct a comprehensive evaluation index,and use cosine similarity to evaluate the importance of nodes.Finally,based on the evaluation results,relevant countermeasures and suggestions are put forward for the development of the current inland container transportation network in Northeast China. |
