City cluster is an effective platform for encouraging regionally coordinated development.Coordinated reduction of carbon emissions within city cluster via the spatial association network between cities can help coordi...City cluster is an effective platform for encouraging regionally coordinated development.Coordinated reduction of carbon emissions within city cluster via the spatial association network between cities can help coordinate the regional carbon emission management,realize sustainable development,and assist China in achieving the carbon peaking and carbon neutrality goals.This paper applies the improved gravity model and social network analysis(SNA)to the study of spatial correlation of carbon emissions in city clusters and analyzes the structural characteristics of the spatial correlation network of carbon emissions in the Yangtze River Delta(YRD)city cluster in China and its influencing factors.The results demonstrate that:1)the spatial association of carbon emissions in the YRD city cluster exhibits a typical and complex multi-threaded network structure.The network association number and density show an upward trend,indicating closer spatial association between cities,but their values remain generally low.Meanwhile,the network hierarchy and network efficiency show a downward trend but remain high.2)The spatial association network of carbon emissions in the YRD city cluster shows an obvious‘core-edge’distribution pattern.The network is centered around Shanghai,Suzhou and Wuxi,all of which play the role of‘bridges’,while cities such as Zhoushan,Ma'anshan,Tongling and other cities characterized by the remote location,single transportation mode or lower economic level are positioned at the edge of the network.3)Geographic proximity,varying levels of economic development,different industrial structures,degrees of urbanization,levels of technological innovation,energy intensities and environmental regulation are important influencing factors on the spatial association of within the YRD city cluster.Finally,policy implications are provided from four aspects:government macro-control and market mechanism guidance,structural characteristics of the‘core-edge’network,reconfiguration and optimization of the spatial layout of the YRD city cluster,and the application of advanced technologies.展开更多
城市群创新网络是提升区域创新能力的重要支撑。以粤港澳大湾区城市群为研究对象,选取web of science科研合作研究数据,采用社会网络分析方法研究大湾区知识创新网络结构空间演化及其形成机制。研究发现:(1)大湾区知识创新网络紧密程度...城市群创新网络是提升区域创新能力的重要支撑。以粤港澳大湾区城市群为研究对象,选取web of science科研合作研究数据,采用社会网络分析方法研究大湾区知识创新网络结构空间演化及其形成机制。研究发现:(1)大湾区知识创新网络紧密程度日益提高,稳定性逐步增强;(2)广州、香港处于知识创新网络中心位置,但深圳已经成长为知识创新网络的新中心;(3)知识创新网络从"广州-香港"双核结构演化成为"广州-深圳-香港"三角结构,并出现"广州—东莞—深圳—香港"大湾区东岸创新集聚带趋势,整体呈现"多中心、多节点、多子群"格局;(4)QAP分析表明地理邻近、技术结构邻近、经济邻近、制度邻近、语言邻近对城市间创新合作形成有显著影响。总体上,深圳将成为粤港澳乃至中国的科技创新中心,打造具有全球竞争力的世界级湾区,应着力强化深圳的创新网络中心地位。展开更多
基金Under the auspices of the National Natural Science Foundation of China (No.72273151)。
文摘City cluster is an effective platform for encouraging regionally coordinated development.Coordinated reduction of carbon emissions within city cluster via the spatial association network between cities can help coordinate the regional carbon emission management,realize sustainable development,and assist China in achieving the carbon peaking and carbon neutrality goals.This paper applies the improved gravity model and social network analysis(SNA)to the study of spatial correlation of carbon emissions in city clusters and analyzes the structural characteristics of the spatial correlation network of carbon emissions in the Yangtze River Delta(YRD)city cluster in China and its influencing factors.The results demonstrate that:1)the spatial association of carbon emissions in the YRD city cluster exhibits a typical and complex multi-threaded network structure.The network association number and density show an upward trend,indicating closer spatial association between cities,but their values remain generally low.Meanwhile,the network hierarchy and network efficiency show a downward trend but remain high.2)The spatial association network of carbon emissions in the YRD city cluster shows an obvious‘core-edge’distribution pattern.The network is centered around Shanghai,Suzhou and Wuxi,all of which play the role of‘bridges’,while cities such as Zhoushan,Ma'anshan,Tongling and other cities characterized by the remote location,single transportation mode or lower economic level are positioned at the edge of the network.3)Geographic proximity,varying levels of economic development,different industrial structures,degrees of urbanization,levels of technological innovation,energy intensities and environmental regulation are important influencing factors on the spatial association of within the YRD city cluster.Finally,policy implications are provided from four aspects:government macro-control and market mechanism guidance,structural characteristics of the‘core-edge’network,reconfiguration and optimization of the spatial layout of the YRD city cluster,and the application of advanced technologies.
文摘城市群创新网络是提升区域创新能力的重要支撑。以粤港澳大湾区城市群为研究对象,选取web of science科研合作研究数据,采用社会网络分析方法研究大湾区知识创新网络结构空间演化及其形成机制。研究发现:(1)大湾区知识创新网络紧密程度日益提高,稳定性逐步增强;(2)广州、香港处于知识创新网络中心位置,但深圳已经成长为知识创新网络的新中心;(3)知识创新网络从"广州-香港"双核结构演化成为"广州-深圳-香港"三角结构,并出现"广州—东莞—深圳—香港"大湾区东岸创新集聚带趋势,整体呈现"多中心、多节点、多子群"格局;(4)QAP分析表明地理邻近、技术结构邻近、经济邻近、制度邻近、语言邻近对城市间创新合作形成有显著影响。总体上,深圳将成为粤港澳乃至中国的科技创新中心,打造具有全球竞争力的世界级湾区,应着力强化深圳的创新网络中心地位。
