中国省际创新网络时空格局演变及其脆弱性评价OA

Due to deglobalization and technological restrictions,building a robust and efficient innovation net-work system is a critical foundation for safeguarding national innovation security.From the perspective of vulner-ability,this study constructs an analytical framework of"structural diagnosis-vulnerability assessment-overall op-timization"to systematically examine the spatiotemporal pattern evolution and structural risks of China's inter-provincial innovation network from 2018 to 2023.The results reveal the following:(1)The intensity of interpro-vincial innovation linkages in China continuously increased from 2018 to 2023,and both network connectivity and knowledge diffusion efficiency improved.However,significant spatial disparities remain.The Beijing-Tian-jin-Hebei region,the Yangtze River Delta,and the Pearl River Delta have formed stable core innovation hubs,while parts of northeast,northwest,and southwest China are still on the network periphery,resulting in an overall structural pattern characterized by"core strengthening and peripheral polarization".(2)The community structure of the innovation network remains generally stable.Innovation collaborations have gradually shifted from cross-regional"enclave-type"connections toward geographically proximate or policy-coordinated regions,forming a structure dominated by high-density communities,such as the Yangtze River Delta,while peripheral communities remain insufficiently embedded.(3)Innovation collaboration has strong dependence on a few key nodes.Continu-ous failures of core nodes may rapidly reduce network efficiency and trigger structural fragmentation.However,as the intermediary roles of secondary nodes strengthen,the network gradually evolves from a single-hub struc-ture toward a polycentric structure,thereby enhancing the system's resilience to shocks to some extent.This study deepens our understanding of structural risks in regional innovation systems from the perspective of com-plex networks and provides theoretical support for balancing efficiency,equity,and security in the development of innovation networks.