| In today’s world,with the rapid development of the global economy,the urbanization process of various countries is accelerating,people’s transformation and influence on nature is also increasing,and environmental issues such as global warming are becoming more and more prominent.As one of the countries with rapid economic development in recent decades,China also faces many serious problems in the process of urbanization.How to improve the urban resilience level to reduce the uncertainty of the future development of the city,reduce the vulnerability of the city,realize the sustainable development of the city,and then rapidly promote the new urbanization construction has become the focus of current scholars’ research.This thesis in 17 provinces and municipalities directly under the central government in henan province and 1 was made the city a total of 18 research unit as the study area,related indicators in a 2007-2017 statistical data as a data source,draw lessons from past research to build urban city elastic evaluation model,and establishes an index system of city elastic,using entropy value method to determine the index weight,then use elastic index,composite index calculation of weighted summation,the cityBased on Excel mathematical statistics,ArcGIS technology and GeoDa spatial autocorrelation analysis method,time evolution,spatial differentiation and spatial autocorrelation analysis of urban elasticity indexes of 18 cities at all levels in henan province were carried out.Principal component analysis of SPSS software was used to analyze and study the main influencing factors of urban elasticity.The results showed that:(1)from the perspective of time evolution,during 2007-2017,except for the final decrease of urban social elasticity,the overall resilience of cities in henan province showed an increasing trend,but the increase was relatively small.(2)from the perspective of spatial distribution,except that the spatial distribution of ecological and economic elasticity in henan province is not very different,other cities show great differences in the spatial distribution.The elasticity level of zhengzhou is higher than that of other cities.The degree of urban comprehensive elasticity is relatively high in central,northern and southeastern henan province.The difference of urban ecology and economic elasticity degree is relatively small.There are great spatial differences between urban engineering and social elasticity distribution,among which the urban engineering elasticity is relatively higher in the south and north of henan province,and the urban social elasticity is relatively higher in the north of henan province.(3)the urban elastic spatial distribution of henan province shows a certain spatial agglomeration,and its spatial distribution is not random,but has a certain correlation.There is a positive correlation between cities of comprehensive elasticity in henan province,and the spatial agglomeration of comprehensive elasticity is gradually strengthened.The spatial agglomeration of the ecological elastic distribution pattern is gradually decreasing and shows a trend of diffusion.The spatial distribution of economic elasticity showed a positive correlation,but the spatial positive correlation gradually weakened after 2012.The agglomeration state of the engineering elastic spatial distribution pattern experienced a change process which first weakened and then significantly increased.The degree of agglomeration of the spatial distribution pattern of social elasticity is gradually decreasing on the whole.(4)SPSS principal component analysis method was used to study the main influencing factors of urban comprehensive elasticity in henan province,and it was found that the factors affecting urban comprehensive elasticity included various aspects of economy,society,ecology and engineering,indicating that to improve the level of urban comprehensive elasticity,all aspects should be coordinated and steadily developed. |
