A research on urban eco-security evaluation and analysis: complex system’s brittle structure model

摘要: Urban ecosystem has become a critical part of ecological security and draws much attention worldwide. It is both result natural system development, also an inevitable outcome human development within certain stage, with the objective identifying possible improvement space for unban evaluation from complex perspective. Based on brittle structure model set pair theory, this paper firstly explored main research methods urban theory its characteristics, then conducted brittleness to analyze factors, primitives, structure. Furthermore, it correlation entropy together analysis method discuss brittleness. And finally, safety been presented based empirical case in Chengdu City China. The theoretical shows that subsystem biggest one. risks collapse can easily trigger entire system. corresponding maximum fluctuation economic subsystem; largest impact change ecosystem. way reducing uncertainty lower difference degree coefficient Relevant decision makers should consider reduce increasing eliminate factors. Thus, threats or be acceptable range under control. An integrated management combing characters natural, economics, social necessary. helpful construction.