Research On Urban Network Linkages Of Urban Agglomerations In The Middle Reaches Of Yangtze River Based On Baidu Tieba Data

The research object of this paper is 31 cities in the urban agglomeration of the middle reaches of the Yangtze River(Hereinafter referred to as UAMRYR),and uses the data of the theme posts in the cities on the Baidu Post Bar platform as the basic data,The main use of SNA method and the dominant flow analysis.Meanwhile,a multiple linear regression model was constructed.In order to explore the "point,line,and surface" structural characteristics of urban network connections in the UAMRYR and analyze the factors affecting the information flow of theme posts.The main conclusions are as follows:(1)The density of urban network connections is high.In the UAMRYR,the urban network has a network connection density of 77.74%,and most cities have relatively common network connections.The density of network links in the three sub-cities of the Wuhan City Circle,the Changzhutan City Group,and the Poyang Lake City Group is 100%.The sub-cities of the UAMRYR have already established a complete network connection with the total city.Compared with the group,the network between the cities within each sub-city group is more closely connected.(2)There are great differences in the intensity of thematic posts among cities.The first level of connection strength mainly exists in Wuhan City Circle,followed by Changsha-Zhuzhou-Tan Urban Agglomeration,and occurs between provincial capital cities and prefecture-level cities.The connection strength between provincial capital cities and prefecture-level cities in the city group around Poyang Lake is in the second level,lacking the first level of connection.The second cascade of trans-sub-urban agglomerations is less intensive and occurs between the three major provincial capitals.The rest of the linkages are in the third level of strength.(3)The centrality gap between different cities is obvious.Judging from the calculation results of the point degree,Wuhan and Changsha can radiate the resources to the maximum extent and absorb the resources to the greatest extent.The outward radiation force of cities such as Nanchang is greater than the inward cohesion,and the influence in urban networks is greater.The sensation of cities such as Xiaogan accepting provincial capitals is more significant than their own influence on surrounding cities.From the calculation results close to the centrality,the intrinsic proximity and centrality of each city are generally not far from the centrality.The outward-centered centrality of the important node cities in the regional central cities is greater than the inward-centered centrality.These cities and urban agglomerations Other cities have shorter shortcuts and less dependence on other cities.Judging from the calculation results of the intermediary center,the provincial capitals are important bridges for the external communication of the provinces in which they are located.The cities with such low bases are low in centrality.They are all cities with small or relatively small populations in the UAMRYR.The status within the urban agglomeration needs to be further enhanced.(4)31 cities can be divided into five types of contacts.From the point of view of the relative centrality of the city,that is,the number of objects connected to each other,31 cities in the UAMRYR can be divided into five types.Wuhan and Changsha are global partner cities,and Nanchang,Yichang,Zhuzhou and Jiujiang are In the general partner cities,Yueyang,Huangshi,Fuyang and Hengyang are more partner cities,11 cities such as Jingzhou are general partner cities,and 10 cities such as Shangrao are less partner cities.There is a lack of global partners and more partner cities in the urban clusters of Poyang Lake.The urban network is not as active as the Wuhan City Circle and the Changsha Zhuzhou City Group.(5)The UAMRYR have not yet formed a dominant and sub-dominant city in an absolute sense.The “one master and one deputy” is the basic skeleton of the urban network structure of the three sub-urban clusters.From the perspective of the advantages of urban paste bar,Wuhan,Changsha and Nanchang are the dominant cities of their respective sub-cities,Yichang,Zhuzhou and Jiujiang are the sub-dominant cities of their respective sub-cities,and the other 25 cities are Subordinate cities,Wuhan and Changsha have absorbed the theme of the neighboring cities,and have shown the prototype of the dominant cities on the scale of the UAMRYR.The rapid development of the Internet has made the hierarchical structure of the urban network in UAMRYR clearer,but it has not completely changed the traditional urban hierarchy.(6)Four small groups and eight large cohesive subgroups were formed in the UAMRYR.Wuhan City Circle belongs to four cohesive subgroups,and the Changzhutan urban agglomeration and the Poyang Lake urban agglomeration belong to two cohesive subgroups.The phenomenon that some of the urban agglomerations in the eight cohesive subgroups are not adjacent but still in the same cohesive subgroup proves to a certain extent that "the flow space will overcome the geographical space distance limitation with the development of information and communication technology".thought.(7)The regional GDP,the number of mobile Internet users,and the number of permanent residents are important factors affecting the information flow network of urban clusters in the UAMRYR.Among them,the number of mobile Internet users and the regional GDP have a greater impact.The impact of total retail sales of income and social consumer goods is second.In addition to this,qualitative factors such as functional positioning,historical culture,and network hotspot events in cities will also have an impact on urban network connectivity.