Temporal-spatial differentiation and influencing factors of urban resilience in urban agglomerations in the Middle Reaches of the Yangtze River

Taking 31 cities in the middle reaches of the Yangtze River urban agglomeration as the research objects, an index system for urban resilience evaluation was constructed, and the urban resilience level from 2008 to 2018 was measured by entropy-TOPSIS method, and in combination with standard deviation ellipses and geographical detectors, the spatio-temporal evolution of urban resilience, the characteristics of center of gravity migration and the influencing factors were put under examination. It finds that the urban resilience of the middle reaches of the Yangtze River urban agglomeration underwent an overall upward trend, with an increasingly narrowing internal resilience difference. From 2008 to 2013, the resilience level took on the ″three-legged standing″ spatial form in Wuhan, Changsha and Nanchang, and the middle and low resilient cities in the three regions were distributed on the periphery of the core cities; The center of gravity of urban resilience changes slightly near the geographic center of gravity of the urban agglomeration, and the migration process shifting in the southeast-northwest-southeast direction went through three stages; The main factors affecting urban resilience are economic strength, financial strength, economic resilience, degree of foreign trade dependence, external liaison ability, medical strength, etc. The interaction between different factors will reinforce the effect of the spatial differentiation of urban resilience.