Study On Features And Coordination Of Nodes In Supply And Demand Networks Of Urban Outward Logistics

In recent years,the development of logistics industry has been strongly promoted in cities of China.However,as there is a lack of understanding in the supply-demand relationship between cities and the law of developing urban logistics,many problems occur in the cities.For example,the positioning of urban logistics planning does not conform to actual location,and the effect of promotion policy in logistics industry happens to be insufficient.Therefore,it is necessary to deeply explore the process of urban logistics development and study the structure of urban system based on the link of external logistics in cities,as well as the mechanism of action of the coordination of supply-demand relationship in external logistics in cities on the development of urban logistics.On the basis of studying domestic and international related literature,this paper constructs the analysis model of urban external logistics and evaluation model of the coordination development for supply-demand relationship of external logistics in cities through employing three aspects of theories including network,economy and self-organization.It also conducts an empirical analysis about the external relationship of logistics in cities of China according to these models.Firstly,this paper constructs the operation and demand network of relationship of external logistics in cities based on the gravity model,and the evaluation index system of relationship of external logistics in cities based on the theory of network centrality.It obtains the development characteristics of cities,the relative relationship of status between different cities and hierarchical structure of cities in China in operation and demand network through the analysis methods of the block partition and circle partition of four-dimensional coordinate system in order to analyze the hierarchical structure and development path of the node cities.Secondly,in order to further study the relationship between supply operation of external logistics in cities and logistics demand,this paper takes the evaluation index system of the relationship of external logistics in cities as the basis and subsystem development,takes the coordination and development of subsystems as the logic order,uses the hypercycle theory and self-organization theory as the basis,and constructs the evaluation model of supply and demand system for relationship of external logistics in cities according to subsystem's development,inter-subsystem coordination,and inter-subsystem coordination development respectively.Finally,this paper adopts the operation network based on the data of 5A logistics enterprises and the demand network based on the total cost of social logistics,and conducts an empirical analysis about the hierarchical structure of network nodes and coordination of supply and demand in relationship of external logistics in cities of China.The conclusion draws on the inherent development rules of coordination in supply and demand between cities,and the impetus mechanism of imbalanced supply and demand between cities to promote the development of urban logistics.