Research On Evaluation And Spatial And Temporal Disparities Of Innovation Ability Of Urban Agglomeration In Yangtze River Economic Belt

China’s economic development has entered a new era,the urban agglomeration which is the core of regional coordinated development has become an important part of China’s economic and social development strategy in the new era.Effectively enhancing the innovation capacity of urban agglomerations in various regions of China is not only the key to ensuring stable and sustainable economic development in China,but also an important guarantee to achieve high-quality economic and social development and create high-quality life in China.The research on the innovation capacity of the Yangtze River Economic Belt urban agglomeration can not only clearly understand the basic situation of the development of the innovation capacity of the Yangtze River Economic Belt urban agglomeration,but also has important practical significance for further improving the spatial pattern of regional innovation capacity improvement of the Yangtze River Economic Belt and promoting the high-quality coordinated development of the region.This paper makes a systematic analysis of the innovation capacity of urban agglomeration in the Yangtze River Economic Belt by comprehensively applying the knowledge of economics,statistics,management and system science,and specifically using the methods of literature research,field research,quantitative research and comparative research.This paper firstly selects typical cities in the Yangtze River Economic Belt,collects relevant index data,combines knowledge innovation ability,industrial innovation ability,service innovation ability,scientific and technological innovation ability and ecological innovation ability,and uses the improved entropy method to measure the innovation ability of the three major urban agglomerations in the Yangtze River Economic Belt.Secondly,the spatial distribution maps and the kernel density distribution maps of the innovation capability of the three major urban agglomerations in the Yangtze River Economic Belt are drawn.Then,theil index was used to analyze the characteristics of the overall,inter-group and intra-group differences in the innovation capacity of the three major urban agglomerations in the Yangtze River Economic Belt,and the variation coefficient was used to measure the σ convergence characteristics of the innovation capacity of the three major urban agglomerations in the Yangtze River Economic Belt.Combining spatial Dubin model with convergence model,this paper analyzes the β convergence and club convergence characteristics of innovation capacity of three major urban agglomerations in the Yangtze River Economic Belt.Finally,based on the development experience of Pacific Coast urban agglomeration in Japan,Silicon Valley urban agglomeration in the United States,Beijing-Tianjin-Hebei urban agglomeration and Pearl River Delta urban agglomeration,this paper summarizes and makes comparative analysis.Accordingly from improving the capacity of urban agglomeration coordinated management,optimization of regional innovation policy environment,to ensure that innovation capital,constructing help regional synergy innovation infrastructure construction,advances some Suggestions on the innovation ability agglomeration in the Yangtze river economic belt to achieve promote east along the river in the Midwest interactive cooperation,promote regional development of the Yangtze river economic belt urban agglomeration theory and the practice basis.The research conclusions of this paper show that:(1)the innovation capacity of the Yangtze river economic belt urban agglomeration is constantly improving,and is developing to a high level of agglomeration.The innovation capacity of the Yangtze River Delta urban agglomeration is balanced,and the coordinated development of regional innovation is advancing in an orderly manner.However,the innovation capacity of some small cities(such as Xuancheng city and Anqing City,etc.)has a large space to improve.The differentiation of urban innovation level in Chengdu-Chongqing economic circle is very obvious.Chengdu city,Mianyang City and Luzhou city are obvious poles of innovation ability growth.The gap of innovation ability in urban agglomeration is large,and the problem of imbalanced and insufficient innovation development is very serious.The innovation capacity of urban agglomerations in the middle reaches of the Yangtze River presents a spatial evolution characteristic from "group collapse" to "multi-point flowering",and three innovation clusters are formed in Hubei,Hunan and Jiangxi provinces around Wuhan,Changsha and Nanchang.(2)The number of cities with low-level innovation capacity in the urban agglomeration of the Yangtze Economic Belt is decreasing,and a number of demonstration cities with extremely high innovation capacity drive the improvement of the innovation vitality of the entire urban agglomeration.The innovation capacity of Chengdu-Chongqing economic circle changes from low level to high level in space.The innovation capacity of urban agglomerations in the middle reaches of the Yangtze River changed from agglomeration to dispersion in space.The innovation capacity of the Yangtze River Delta urban agglomeration is constantly improving,and the number of high-level innovation cities is increasing.(3)The overall regional gap in innovation capacity in the Yangtze River Economic Belt is gradually increasing and widening year by year.The innovation capacity gap between the Yangtze River Delta urban agglomeration,the middle reaches of the Yangtze River urban agglomeration and the Chengdu-Chongqing economic circle experienced a huge fluctuation from time to time,and slightly decreased on the whole.The innovation capacity differences among the three urban agglomerations are expanding,and the unbalanced development of innovation capacity within the three urban agglomerations is the leading reason for the overall innovation capacity gap of the Yangtze River Economic Belt.Comparatively,the innovation capacity development gap among urban agglomerations has little impact on the overall innovation capacity of the Yangtze River Economic Belt.(4)The absolute gap of the overall innovation capacity of the three major urban agglomerations of the Yangtze River Economic Belt is increasing,but the relative gap is gradually narrowing.The relative gap of urban innovation capacity in Chengdu-Chongqing economic circle is expanding,the relative gap of urban innovation capacity in the middle reaches of the Yangtze River urban agglomeration is narrowing,and the relative gap of urban innovation capacity in the Yangtze River Delta urban agglomeration is expanding slightly.The fastest divergence of knowledge innovation capability reveals that it is of great significance to promote the full flow of knowledge elements inside and outside the region to improve the regional innovation level.The three city agglomerations still have a large space for improvement in the five dimensions of knowledge innovation,industrial innovation,service innovation,scientific and technological innovation and ecological innovation.