Analysis On The Structural Characteristics And Driving Forces Of Population Flow Network In China’s Eight Urban Agglomerations

Urban agglomeration is the product of the transformation and development of national urbanization and industrialization to the advanced stage,which has a farreaching impact on the overall layout of infrastructure,socio-economic development and ecological environment coordination of the whole region.City covid-19 has shown resilience and resilience in response to the impact of the outbreak.Therefore,analyzing the differences of network characteristics of different urban agglomerations,studying the driving force mechanism of high-density agglomeration of urban agglomerations under the background of informatization and globalization,and revealing the comprehensive influence degree of various driving forces in the formation and development of urban agglomerations have certain construction guiding significance for the development and planning of urban agglomerations.At present,the research on urban network is mostly based on undirected network,ignoring the asymmetry of urban relations;There is little combination between the traditional static network based on field data and the dynamic network based on stream data.The research on the formation mechanism of urban agglomeration network structure still stays in the urban node itself.City City city network is constructed from the three levels of network completion,structure and agglomeration.The city network structure is analyzed by cluster analysis,and the urban network structure and the resilience level of the city group under COVID-19 impact are deeply explored.The attribute network is superimposed with the population flow network,and a research method of the driving force of the directed urban connection network considering the relationship between cities is proposed.Based on the directed transformation,the central improvement of urban attribute network,combined with the regression analysis of urban contact network,explores the driving force of the formation of urban contact network,and provides a new idea for the scientific and accurate measurement of the networking and mechanism research of urban agglomeration.The main conclusions are as follows:The Yangtze River Delta urban agglomeration,the middle reaches of the Yangtze River urban agglomeration,Chengdu Chongqing urban agglomeration and Shandong Peninsula urban agglomeration have shown good network resilience under the impact of the epidemic;The Pearl River Delta urban agglomeration,Beijing Tianjin Hebei Urban Agglomeration,Chengdu Chongqing urban agglomeration and Shandong Peninsula Urban Agglomeration show more significant urban agglomeration than the urban agglomeration in the middle reaches of the Yangtze River,Kazakhstan Great Wall urban agglomeration and Central Plains urban agglomeration;Except Harbin Changcheng city group,other urban agglomerations show obvious spatial proximity and internal agglomeration effects in cluster analysis;The Yangtze River Delta urban agglomeration has effectively broken the inter provincial effect,and the other urban agglomerations with inter provincial resistance show obvious inter provincial effect in population flow.Due to different development stages of urban agglomerations,the driving forces for the formation of urban network structure are also different.The Yangtze River Delta urban agglomeration has high development vitality,and the advantages of industrial structure have formed a great attraction to population mobility;The comprehensive strength of Beijing Tianjin Hebei and Pearl River Delta urban agglomeration is strong,and employment vitality and infrastructure construction have become the key factors to promote population mobility;The development of urban agglomerations in the Central Plains and the middle reaches of the Yangtze River is relatively backward,and the main demand of population mobility is still to solve the problem of "food and clothing";For Chengdu Chongqing and Shandong Peninsula Urban Agglomerations with little or no inter provincial resistance,employment vitality and infrastructure construction are the main driving forces of population mobility respectively;Due to the decline of traditional industries,ha Changcheng city group is forming a new round of industrial pattern.The formation of the above differences is inevitably related to the geographical location and structure of urban agglomerations.The development stage of urban agglomerations located in the southeast coast is relatively mature,while the urban agglomerations located in the central,Western and northeast regions need to be further developed and improved;The population flow of urban agglomerations with high agglomeration mainly depends on the attraction generated by employment vitality and infrastructure construction,while urban agglomerations with low agglomeration have not formed a metropolitan area with absolute advantages to attract the population.Based on the above conclusions,in the follow-up construction and development of China’s urban agglomeration,we should fully tap the characteristic industries in the central and western regions and Northeast China,form a metropolitan area with core cities,and further drive the development of surrounding cities.For more mature urban agglomerations,we should give full play to the role of innovation in urban development,take the high-quality development of high-tech industries as the goal,narrow the gap between cities and achieve coordinated development.