长江经济带地级城市间技术创新关联网络演变特征研究

Research on the Evolution Characteristics of Technological Innovation Association Network among Urban Cities in the Yangtze River Economic Belt

基于修正的引力模型构建长江经济带地级城市间技术创新空间关联网络,运用社会网络分析法探究2013—2018年空间关联网络的演变特征。研究发现:长江经济带城市间技术创新空间关联网络属于低密度、高效率、严格等级的网络类型;上游地区以成渝为典型代表的中心城市影响力明显提升,中游的武汉和长沙两个城市的中间传导角色不断强化,以上海为中心的下游城市群处于核心动力源地位;小群体分析结果显示,四个板块成员之间发生重组,2018年形成4个定位明确的小群体,分别为“双向溢出”板块、“净溢出”板块、“净受益”板块和“经纪人”板块。据此,从区域协同创新角度提出优化长江经济带城市群技术创新网络结构的政策建议。

Based on modified gravity model,spatial association network of technological innovation was constructed among urban cities in the Yangtze River Economic Belt(YREB).Social network analysis(SNA)method was applied to explore out their evolution characteristics during 2013-2018.Results are as follows.This network shows lower density,higher efficiency and rigid stratification properties.Such typically central cities as Chengdu and Chongqing cities of upper YREB region show increasing influences significantly of the association network.Wuhan and Changsha cities of middle region of YREB are playing roles as more significant middleman.And such downstream region as surrounding Shanghai city keeps the core power source of YREB network.Based on small cluster analysis,these cities are classified into four blocks and their members changed.In 2018,the four blocks are“bidirectional spillover”,“net spillover”,“net beneficial”and“broker”.Therefore,policy implications are put forward to optimizing technological innovation network structure among urban cities of YREB with respect to regional innovation coordination development.