Spatial-temporal Heterogeneity of Economic Connection Intensity and Its Network Structure in Bohai Economic Circle
As a new engine to stimulate China's economic growth,the Bohai economic circle shoulders an im-portant mission in the high-quality economic development in the new era.Based on ArcGIS 10.8 and Ucinet 6.0,this paper takes 43 cities in three provinces and two cities where the Bohai economic circle is located as the research object,and uses the modified gravity model and social network analysis method to explore the spa-tial-temporal heterogeneity of economic ties and network structure between cities from 2010 to 2021.The results are as follows.1)The intensity of economic ties in the Bohai economic circle has gradually increased,the growth rate has slowed down from fast to slow,the regional differentiation is obvious,the cities with high eco-nomic ties are concentrated and stable,and most cities are at a low level of ties.2)The overall network density value is low and slowly increasing.From high to low,it presents the spatial distribution characteristics of the middle,south and north.The network structure tends to be complex and the degree of compactness is signifi-cantly improved.3)Centrality presents the spatial-temporal heterogeneity of overall improvement and unbal-anced economic radiation.4)Within the economic circle,four agglomerative subgroups are formed at the sec-ondary level of the city,and eight subgroups are formed at the tertiary level in the early stage of the study peri-od,and then reduced to seven at the later stage.The subgroups show a spatial distribution pattern of three areas and multiple points.On this basis,some suggestions are put forward,such as strengthening regional cooperation,defining core cities and building transportation circles,in order to provide reference for regional coordination and high-quality development of Bohai economic circle.
economic linkagenetwork structuregravity modelBohai economic circle
万方数据
维普
