Lan - Cities And Towns Of The West Regional Pree Interactive Feedback Mechanism

City region is a synthetical, complicated and dynamic system containing population, resource, economy, environment, politics and culture. The core of City sustainable development is to require that economy, population, resource and environment cohere each other, whose essence is the sustained using of City region's resource, and continually enhancing the resource's utilization ratio and economic development level, paying more attention to the population development and the environment protection. So the road of sustainable development urges the City region PREE system's research. The research of City region PREE system interaction feedback mechanism explore the development situation, dynamic factor, dynamic trend and interactive coordination, having deep effects to the research of the development and the trend of Lanzhou-Xining City region.The thesis regards Lanzhou-Xining City region as the research object, summed up both home and abroad research's main outcome about City region development, sustainable development and PREE coordination development, defined the conception of City region, PREE system and resilience. Using ways as historical analysis and contrastive analysis to research the development course and space distribution pattern of the Lanzhou-Xining City region's population, resource, economy and environment, discussing the development situation and interaction mechanism in a such peculiar area with peculiar geographical position and natural condition. Analyzing the interaction feedback mechanism of City region development and each subsystem of PREE system, providing the reality base for quantitative analysis and evaluation with the qualitative methods which Integrate theory with practice. Building up appraise index system and mathematic model, applicating the methods as the principal component analysis and static state coordination for quantitative analysis of the PREE system coordinated growth situation. And introduce the conception of resilience generated from "Panarchy" into our research for quantitative evaluation of Lanzhou-Xining City region PREE system and each inside subsystem's resilience to problems and challenges in the City region development.On the base of the qualitative and quantitative research result of PREE system's development, coordination and resilience situation, this thesis provided the optimizing mechanism of Lanzhou-Xining City region PREE system development. Figuring out that local government should synthesize the PREE system coordinated growth from the scientific outlook on development according to reality, use different development chance and time background, control population scale, enhance population quality, put the ecological economy strategy into effect, rational exploitation of resource, highly consider environment efficiency, promote the coordination of population, resource, economy and environment, realize the Lanzhou-Xining City region sustainable development.