| The coordinated development of Beijing,Tianjin and Hebei as a major national strategy has achieved initial success after a series of policies were promoted.However,it is still necessary to further explore Beijing's non-capital functions,improve industrial cooperation among the three regions,and optimize the spatial layout of regional industries.Therefore,it is necessary to comprehensively and scientifically evaluate the results of current optimization and upgrading of the industrial structure of the Beijing-Tianjin-Hebei region.Based on the theory of regional industrial cooperation and industrial structure,this paper empirically analyzes the optimization and upgrading effect of Beijing-Tianjin-Hebei industrial structure in three terms: subdivision industry,sustainable development,and industrial coordination.First of all,in the perspective of subdivided industries,it is analyzed that the development of the sub-industries and employment situation in each region of Beijing,Tianjin and Hebei by adjusting the value of industrial structure and the degree of industrial structure deviation.Secondly,from the aspect of sustainable development,it takes combination of five development concepts the multi-index evaluation system,and it is appropriate weights to measure the effectiveness of optimizing and upgrading the regional industrial structure that are given to measure.Finally,the deviation share method was used to analyze the competitiveness of the Beijing-Tianjin-Hebei regions,and the industrial cooperation similarity coefficient and the industrial division index were used to measure the industrial cooperation in the BeijingTianjin-Hebei region,and the space gravity model was used to measure the two core points of the Beijing-Tianjin-Hebei region.The economic radiation situation in the surrounding area.The results of this study show that the overall industrial structure of the Beijing-TianjinHebei region has been optimized,but there are still some problems;the development of Hebei Province has some drawback in many industries,and the score of the overall industrial structure is also lower than that of Beijing and Tianjin;The phenomenon of industrial homogenization in the region is more prominent and the complementarity is not strong,which is not conducive to the coordinated development of the industries in the three places. |