The use of multi-perspective and multi-scalar city networks has gradually developed into a range of critical approaches to understand spatial interactions and linkages. In particular, road linkages represent key chara...The use of multi-perspective and multi-scalar city networks has gradually developed into a range of critical approaches to understand spatial interactions and linkages. In particular, road linkages represent key characteristics of spatial dependence and distance decay, and are of great significance in depicting spatial relationships at the regional scale. Therefore, based on highway passenger flow data between prefecture-level administrative units, this paper attempted to identify the functional structures and regional impacts of city networks in China, and to further explore the spatial organization patterns of the existing functional regions, aiming to deepen our understanding of city network structures and to provide new cognitive perspectives for ongoing research. The research results lead to four key conclusions. First, city networks that are based on highway flows exhibit strong spatial dependence and hierarchical characteristics, to a large extent spatially coupled with the distributions of major megaregions in China. These phenomena are a reflection of spatial relationships at regional scales as well as core-periphery structure. Second, 19 communities that belong to an important type of spatial configuration are identified through community detection algorithm, and we suggest they are correspondingly urban economic regions within urban China. Their spatial metaphors include the administrative region economy, spatial spillover effects of megaregions, and core-periphery structure. Third, each community possesses a specific city network system and exhibits strong spatial dependence and various spatial organization patterns. Regional patterns have emerged as the result of multi-level, dynamic, and networked characteristics. Fourth, adopting a morphology-based perspective, the regional city network systems can be basically divided into monocentric, dual-nuclei, polycentric, and low-level equilibration spatial structures, while most are developing monocentrically.展开更多
The territorial and spatial planning is an essential tool for ecological civilization construction in spatial development and urban governance.Since ecological space has been an important part of the territorial and s...The territorial and spatial planning is an essential tool for ecological civilization construction in spatial development and urban governance.Since ecological space has been an important part of the territorial and spatial planning,this study established a spatial structural pattern of"ecological source-ecological corridor-ecological node"along with methods including landscape connectivity analysis and ecological resistance surface analysis.Taking the ecological space of Xuzhou City,a typical resource-based city,as a case study,this research analyzed the ecological spatial network structure and evaluated the evolution characteristics before judging the breadth threshold value of the ecological corridor and providing planning control strategy.The study found that since the urbanization of Xuzhou City resumed its growth,the quantity of ecological sources,corridors,and nodes have grown along.The resistance of the ecological corridor increases year by year,with the proper breadth threshold value around 100–200 m.The development of an ecological network structure shows a single-polarization evolution characteristic that is high quality and high resistance.展开更多
基金National Natural Science Foundation of China,No.41530751,No.41471113,No.41601165
文摘The use of multi-perspective and multi-scalar city networks has gradually developed into a range of critical approaches to understand spatial interactions and linkages. In particular, road linkages represent key characteristics of spatial dependence and distance decay, and are of great significance in depicting spatial relationships at the regional scale. Therefore, based on highway passenger flow data between prefecture-level administrative units, this paper attempted to identify the functional structures and regional impacts of city networks in China, and to further explore the spatial organization patterns of the existing functional regions, aiming to deepen our understanding of city network structures and to provide new cognitive perspectives for ongoing research. The research results lead to four key conclusions. First, city networks that are based on highway flows exhibit strong spatial dependence and hierarchical characteristics, to a large extent spatially coupled with the distributions of major megaregions in China. These phenomena are a reflection of spatial relationships at regional scales as well as core-periphery structure. Second, 19 communities that belong to an important type of spatial configuration are identified through community detection algorithm, and we suggest they are correspondingly urban economic regions within urban China. Their spatial metaphors include the administrative region economy, spatial spillover effects of megaregions, and core-periphery structure. Third, each community possesses a specific city network system and exhibits strong spatial dependence and various spatial organization patterns. Regional patterns have emerged as the result of multi-level, dynamic, and networked characteristics. Fourth, adopting a morphology-based perspective, the regional city network systems can be basically divided into monocentric, dual-nuclei, polycentric, and low-level equilibration spatial structures, while most are developing monocentrically.
基金funded by the National Key Research and Development Program of China(2018YFD1100203)the second batch of open funds from Jiangsu Collaborative Innovation Center for Building Energy Saving and Construction Technology(SJXTQ1616)+1 种基金the Natural Science Foundation of Education Department of Anhui Province(KJ2020A0078)the Scientific Research Foundation for the Introducing of Talent of Anhui Science and Technology University(ZRC2014466)。
文摘The territorial and spatial planning is an essential tool for ecological civilization construction in spatial development and urban governance.Since ecological space has been an important part of the territorial and spatial planning,this study established a spatial structural pattern of"ecological source-ecological corridor-ecological node"along with methods including landscape connectivity analysis and ecological resistance surface analysis.Taking the ecological space of Xuzhou City,a typical resource-based city,as a case study,this research analyzed the ecological spatial network structure and evaluated the evolution characteristics before judging the breadth threshold value of the ecological corridor and providing planning control strategy.The study found that since the urbanization of Xuzhou City resumed its growth,the quantity of ecological sources,corridors,and nodes have grown along.The resistance of the ecological corridor increases year by year,with the proper breadth threshold value around 100–200 m.The development of an ecological network structure shows a single-polarization evolution characteristic that is high quality and high resistance.
