Study On The Deconstruction And Resilience Of Urban Megalopolis Network In Guanzhong Plain

Urban megalopoliss have emerged as a significant driving and leading force in the current era of accelerating economic globalization and urbanization,social,and cultural development.Studying the network structure of urban megalopoliss helps to grasp the spatial pattern characteristics between cities.The structural and functional differences in urban megalopolis networks directly affect regional functionality and resilience.Therefore,studying the resilience of urban megalopolis network structure helps to avoid negative effects and provide guarantees for sustainable and stable regional development.The Guanzhong Plain urban megalopolis has a unique strategic position in national modernization and all-round opening up,Playing a crucial role in connecting both the eastern and western regions,Both the northern and southern areas.A deeper understanding can be gained by studying the urban network of the Guanzhong Plain urban megalopolis of the authentic situation and characteristics of urban exchanges and cooperation within the region,provide targeted policy recommendations for it promotes the coordination and rational layout of regional and urban development while also contributing to its economic development.This paper selects three time sections in 2017,2019 and 2021,and uses social statistics,Baidu search index and Tencent location big data to establish the urban network of the Guanzhong Plain urban agglomeration in three dimensions of economy,information and transportation,and uses Arc GIS10.2 spatial analysis software and UCINET6.3 network analysis tools to conduct network analysis,and evaluate network density,contact strength,centrality,core edge structure and other indicators.Complex network theory and Gephi 0.9.2 social network analysis tool were utilized to measure the network resilience part of the urban cluster,considering the resilience of the overall network and individual urban nodes from four aspects: hierarchy,matching,transmission,and diversity.Finally,based on the analysis of network structure and resilience,suggestions and paths for optimizing the spatial arrangement of the Guanzhong Plain city cluster were proposed.After analysis,The major results are summarized below:(1)During the study period,the network density of the economic and transportation network of the Guanzhong Plain urban megalopolis gradually increased,and the degree of network connectivity became stronger.In addition,the information network density decreases slightly after increasing,and is still better than the economic and transportation networks on the whole.The intensity of the three types of network connection keeps on the rise,the connection between cities is getting closer,and the cities are more inclined to connect with the core cities.The advantage of Xi’an’s network centrality is further expanded with other node cities,and the polarization of network centrality is more obvious.In the core-edge structure of the three types of networks,the core area has expanded,and the semi-edge cities have increased more,and the network has developed towards a balanced direction.(2)Over time,the hierarchical resilience of the economic and transportation network structures of the Guanzhong Plain urban megalopolis increased,and the intercity hierarchical structure became more obvious,followed by the hierarchical resilience of the information network structure;the level of hierarchical resilience of the transportation network structure decreased.(3)The matching of the economic network becomes worse and not high;the information network has better matching resilience,which is conducive to information dissemination;the matching resilience of the transportation network structure is getting better and better,and the three types of matching are all heterogeneous resilient networks during the research period.Hierarchy and matching in economic,information,and transportation networks are reflexive.(4)During the study period,Xi’an and Xianyang have more and more influence on the economy,information and transportation network;in contrast,the influence of Qingyang,Pingliang and Tianshui on the economy,information and transportation network is almost constant.Further studies have found that when a node city in the economic,information and transportation network fails,the fading will simultaneously affect the transmission and diversity of the network.In order to optimize the network structure of the Guanzhong Plain urban megalopolis,the following suggestions are put forward: for the economic network,subcentral cities should be cultivated and developed,and the industrial development of each city should be promoted mainly through planning and guidance;for the information network,the formation of differentiation and complementarity within the urban megalopolis should be encouraged to promote the rational distribution and flow of information;for the transportation network,degree of urban economic maturation should be improved,the construction of the transportation road network should be promoted,and the barriers of administrative boundaries should be broken.