科技服务产业集聚背景下城市格局时空演变特征及趋势研究

科技服务业是聚集创新要素的核心产业，研究科技服务业集聚背景下的城市格局特征，对国家协调创新城市体系建设和提升城市化水平具有重要意义。基于投入产出理论，构建科技服务产业集聚背景下的城市关联网络，借用社会网络方法测度城市格局时空演变特征和趋势。研究发现：科技服务产业集聚过程中大多数城市围绕少数关键城市形成了相对紧密的关联网络，并且集聚高地由沿海逐渐向东北、西部、中部和山东半岛地区拓展;少数关键城市发挥着以最短路径承载创新要素在城市间流通的中介作用;多数区域之间能够通过若干个城市关联实现互相连通，东北、山东半岛、西南、西北和中部地区与长三角集聚中心均存在最短中介枢纽，并且集聚进程中城市的带动作用差异逐渐扩大;凝聚子群2和3中的城市自组织能力不断增强。最后，针对结论提出推动建立协调创新城市体系和提升城市化水平的建议。

Research on the Temporal-Spatial Evolution and Trend of Urban Service Patterns in the Agglomeration of Science and Technology Service Industry

As a core industry that gathers innovation factors. It is of great significance to study the urban pattern characteristics under the background of science and technology service industry agglomeration for the construction of national coordinated innovation city system. Based on the theory of input and output, this paper constructs an urban association network under the background of agglomeration of science and technology service industry, and uses social network method to measure the temporal and spatial evolution characteristics and trends of urban pattern. The study found that most cities in the process of agglomeration of science and technology services formed a relatively close network around a few key cities, and the agglomeration highlands gradually expanded from the coast to the northeast, west, central and Shandong peninsula. A few key cities play an intermediary role in carrying the innovation elements in the shortest path to circulate between cities; most regions can communicate with each other through several urban associations, and the shortest intermediary hub exists in the northeast, Shandong peninsula, southwest, northwest and central regions and the Yangtze River Delta gathering center. The gathering center carries out the exchange of elements, and the difference in the driving action of the cities in the agglomeration process is gradually expanding. The self-organization ability of cities in cohesive subgroups 2 and 3 is continuously enhanced. Finally, the corresponding recommendations for promoting the establishment of a coordinated and innovative urban system are proposed.