The Evolvement And Driving Factor Of Economic Network Structure In The Beijing-Tianjin-Hebei Urban Agglomeration

Under the dual background of the "Internet+" and global economic integration,urban agglomeration presents a trend of rapid expansion and regional integration.At present,urban agglomeration is an important form of spatial organization for countries to participate in international competition and international division of labor,and gradually grows into the core of regional economic development.In addition,the development of urban agglomeration in the future has a profound impact on China's economic development pattern.Various economic factors,such as capital,information and technology,flow within the region freely,and strengthen the connection between the nodes of the urban agglomeration and the external regions,and they play a significant role in promoting the spatial structure evolution of the urban agglomeration.The development and evolution of the urban agglomeration economic network has been paid attention to in many aspects,including governments and scholars from all walks of life,especially in the structure of network and the connection between the nodes within the urban agglomeration,which is conducive to better studying and identifying the changing trend of the structure of the whole urban agglomeration.Therefore this article selects the beijing-tianjin-hebei urban agglomeration as the research object,based on the data of 13 cities in 1990,2000,2010 and 2015,and the related research results at home and abroad are summarized and sorted out as the theoretical basis,according to research thought from "point-line-face" to explore characteristics of beijing-tianjin-hebei urban agglomeration economy network structure evolution process and its driving factors,and then puts forward suggestions for the optimization of urban agglomeration economy network,to promote the purpose of beijing-tianjin-hebei urban agglomeration better and faster development.In this paper,the main research contents and train of thought is following:firstly,build a comprehensive evaluation index system,select index that can reflect the degree of urban economic scale,economic structure,opening and social service,adopt the method of factor analysis to compare comprehensive economic strength of different node cities in beijing-tianjin-hebei urban agglomeration,and 13 cities are divided into four grades;Secondly,the traffic accessibility time of the beijing-tianjin-hebei city cluster is calculated at four time points:1990,2000,2010 and 2015,and this factor is taken into account in the modified gravity model to analyze the evolution trend of the strength and weakness of economic ties between cities.Thirdly,social network analysis is adopted to explore the evolution process of the overall characteristics of economic networks from the perspectives of network density,network centrality and cohesive subgroup.Finally,the driving factors of the evolution of urban agglomeration's economic network structure are discussed in depth from the perspectives of society,transportation,economy and science and technology by using QAP analysis method.The study found that the economic network structure of the beijing-tianjin-hebei city cluster has begun to take shape.The urban cluster can be roughly divided into three regions,the central region is the most closely connected,the correlation between the southern nodes is relatively weak and the economic network is preliminarily formed,and the connection between the northern nodes of the region is the most weak and the construction of the economic network has not been completed.Social,transportation,economic and technological factors have a significant impact on the evolution of urban agglomeration's economic network structure.