| Under the background of globalization,informatization,and urbanization,the regionalization characteristics become more and more prominent,and urban agglomerations have begun to appear on the world stage as new competitive units.The spatial connection of urban agglomerations has great influence on the population size,industrial layout and economic development of the city.At present,the Guangdong-Hong Kong-Macao Greater Bay Area has become the leading demonstration area and frontier position for China’s in-depth reform and opening-up.From the perspective of economic development foundation and development potential,the Guangdong-Hong Kong-Macao Greater Bay Area already has the strength to benchmark the world-class bay area.As the construction of the Guangdong-Hong Kong-Macao Greater Bay Area has become a national strategy,how to speed up the construction of the Greater Bay Area urban agglomeration has been highly valued by all parties.Therefore,the analysis of the overall network structure characteristics and the position of node cities in the network from the perspective of the urban network in the Greater Bay Area is of great significance to the promotion of economic coordination,healthy and sustainable development of the Greater Bay Area.This study takes the Guangdong-Hong Kong-Macao Greater Bay Area as the research area,and measures the urban network at three different time points,2005,2010,and 2017 respectively,based on the spatial organization relationship of productive service enterprises.Firstly,it analyzes the development status of productive services and the evolution of urban functions in the Greater Bay Area.Then,combined with the social network analysis method,it analyzes the evolution characteristics of the overall and sub-industry network structure and node city status.At last,using QAP method to explore the change mechanism of the driving mechanism of urban network.The results show that:(1)At present,the development level of main productive service industries and urban service functions of cities in the Greater Bay Area have different characteristics.The development level of the city’s productive service can be divided into two levels,and the differences between the levels are constantly Shrinking,the central city has complete urban service functions while there is a certain lack of non-central cities.The industry network layout is in the process of horizontal diffusion;(2)As the network density in the Greater Bay Area keeps increasing,the overall network presents a core-semi-edge-edge Structural characteristics,and multi-center,hierarchical characteristics become obvious.With the passage of time,the differences between different levels tend to narrow and evolve towards flattening and equilibrium.Different sub-sectors have different network structure characteristics.Finance and logistics networks have core-semi-edge-edge structural characteristics.Accounting and advertising networks have weakly characterized core-edge-semi-edge structures.The number of cities in the half-edge circles is significant.Less than the edge circle layer,the legal and consulting network does not have a circle layer structure,showing polarized characteristics;(3)Guangzhou,Shenzhen,and Hong Kong,the three central cities in the Greater Bay Area,together form a "triangle" backbone network,The influence of non-central cities in the network is gradually increasing,but there is still a big gap with the central city in terms of network status and resource control;(4)Through QAP regression analysis,it is found that there are differences in the driving mechanism of network in different periods,and the driving factors of network evolution change from foreign capital to domestic demand,innovation and people’s livelihood.Specifically,the influence of technological innovation capabilities on the Internet has begun to emerge,and the government’s "tangible hand" has continuously strengthened the impact on the Internet,with the influence mode changing from power-led to public service-led. |
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