基于模糊聚类方法的城市生态系统健康评价  

Assessment for urban ecosystem health based on fuzzy clusting methed

作　　者：张俊华[1] 杨耀红[2] 陈南祥[1] 

机构地区：[1]华北水利水电学院资源与环境学院,河南郑州450011 [2]华北水利水电学院水利学院,河南郑州450011

出　　处：《河南农业大学学报》2010年第3期360-364,共5页Journal of Henan Agricultural University

基　　金：国家自然科学基金项目(40772165)

摘　　要：基于城市是以人工为主导的自然、经济、社会的复合生态系统的内涵,构建了城市生态系统健康指标体系.为避免评价指标标准的不确定性问题,采用模糊聚类理论,求解最优模糊聚类模式矩阵与最优模糊划分矩阵,再利用级别特征值向量的确定方法,求出各年份的健康归属级别.研究结果表明,郑州市城市生态系统健康状况都在向好的方向发展,其中2004年属于不健康状态,2005—2007年属于较健康状态,2008年属于健康状态,但隶属度分值只有0.775 8,离真正的健康状态还有一段距离.Based on the notion that urban eco-system is an artificial compound eco-system which includes natural subordinary system,economical subordinary system and social subordinary system,an urban eco-system assessment health index system is established.In order to avoid the problem of undeterministic standard value of index in other researches,fuzzy clustering method is adopted to solve the optimization mode matrix of fuzzy clustering and optimization fuzzy classifying matrix.Then the health grades of every sample years are obtained by using the method of acquiring grade characteristic value vector.The results show： Zhengzhou urban ecosystem health condition shows upward trend,with 2003 belonging to unhealthy state,2004,2005,2006 belonging to meta-healthy state,and 2007 belonging to healthy state,but it is far from completely healthy state as the membership is only 0.775 8.

关 键 词：城市生态系统健康 模糊聚类 熵权 级别特征值 

分 类 号：X826[环境科学与工程—环境工程]