Quality Measurement And Evaluation Of Urban Resilience In Gansu Province

From the continuous enrichment of the concept of resilience to the combination with the complex main city,the concept of urban resilience is consistent with the contemporary concept of sustainable development,and has become a leading and hotly discussed topic of urban development.The key of current research is to accurately quantify urban resilience,explore the internal mechanism between systems,and seek appropriate strategies for improving urban resilience.This thesis quantitatively evaluates the resilience of each city in Gansu Province and explores the degree of interaction between subsystems,so as to find the appropriate strategies to improve the resilience of Gansu province.Firstly,based on the connotation and extension of urban resilience,an index system of urban resilience was established from the aspects of economic system,social system,infrastructure system and ecosystem system.The entropy method is adopted as the evaluation index function,the toughness of city,Gansu province,respectively from the perspective of provincial and regional evolution analysis,introducing the coupling coordination degree model,from the perspective of provincial and regional exploration analysis of Gansu province cities in the state of the economy,society,infrastructure and ecological system coupling coordination situation and evolution characteristics,the analysis of the internal mechanism of urban resilience system.Secondly,the thesis combines the genetic algorithm and machine learning to build a limit-extreme learning machine based on genetic algorithm(GA)-ELM city,toughness simulation method based on the urban toughness values obtained from index evaluation function,on the basis of introducing the genetic algorithm to optimization of model parameters,further enhance the ELM model simulation precision,using genetic algorithm to optimize the ELM model,Combined with the goals of the 14 th Five-Year plan,the dynamic simulation of urban resilience was carried out,and the strategies for improving urban resilience in Gansu province were further proposed.Thirdly,by analyzing the coupling coordination of the four urban systems in Gansu Province and combining with the urban resilience improvement strategy simulated by GA-ELM model,the thesis summarizes the status quo of urban resilience in Gansu Province,and tries to put forward thoughts and prospects for the urban resilience improvement strategy in Gansu Province,so as to improve the cities in Gansu province for the government.