| With the development of information technology,some resources for production like human,materials,capitals,information and technologies have accelerated the flow between cities,and the boundaries between cities have gradually blurred.Now,close interconnection among cities forms a complex and unified spatial network system.The flow of geographical adjacent geography with the flow of resource elements and achieved time-sharing of time sharing has become a new spatial organization dominant form.The existence of flow space promotes the gradual transformation of space organization from static,closed and hierarchical central mode to multi-centered,flat and mobile network mode.As the largest economic sector in China,the Chengdu-Chongqing area was upgraded to Chengdu-Chongqing Economic Circle in 2020,and is committed to forming an important growth of high-quality development in the west.Build the spatial network structure of the Chengdu-Chongqing Economic Circle,explore its network structure characteristics and influencing factors,help understand the problems existing in the area of space in the regional cities,and put forward suggestions of adapting to local conditions,improve the integrated economic circle and region of the Chengdu-Chongqing region,Multi-level coordinated development has promoted the Chengdu-Chongqing region to become a new growth pole of China’s economic development.This thesis will start from the perspective of resource flow and combine open network data to obtain four types of flow data of people flow,logistics flow,economic flow and technology flow between cities through multi-source channels,and form multiple flow data based on multi-source heterogeneous data to form five types of flow space urban spatial network connection matrix for 142 districts and counties of the Chengdu-Chongqing Economic Circle.Network visualization software Ucinet and Arc GIS is used.Social network analysis method,T Value method and dominant flow analysis method are used to explore the network structure characteristics and possible problems of various flow Spaces inside the Chengdu-Chongqing Economic Circle from the three dimensions of "point-line-plane".Meanwhile,the influence factors of the urban spatial network structure in the Chengdu-Chongqing Economic Circle are empirically-analyzed by QAP method.Then put forward the corresponding optimization strategy to promote the development of regional integration.The results show that:(1)The "dual core" characteristics of Chengdu and the main urban area of Chongqing in the economic circle are obvious.The core function performance of the main urban area of Chongqing is weaker than that of Chengdu.The overall development of the central axis counties is the best,and the development trend of the northern counties of the economic circle is better than that of the southern counties.(2)The two core areas of the economic circle gradually show the trend of integration,the overall development state of west-east,Chengdu metropolitan area,Chongqing city and western Chongqing,and northeast Sichuan and northeast Chongqing show the phenomenon of integrated development,the factors of the peripheral areas of the economic circle far from the core area are mainly concentrated in the city,the coordinated development of the region is still restricted by geographical conditions and administrative divisions.(3)The global network centrality degree of technology flow in the economic circle and the intensity of technology connection between districts and counties are at a low level.The promoting effect of technology flow on the formation of comprehensive network is the lowest.The technology connection in the economic circle is weak,and the technology exchange activities are scarce.(4)Factor networks tend to flow to administrative areas with large population,higher economic level,better technological innovation and development,and rich regional resources.Population size and industrial structure of districts and counties have important effects on the composition of spatial networks. |
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