基于灰色聚类法的长江经济带中心城市生态安全评价研究

以长江经济带为研究区域,选取长江经济带中心城市武汉市、上海市、重庆市为研究对象,首先运用PSR模型构建具有长江经济带特色的生态安全评价指标体系,包含目标层、准则层、指标层3个层次共31个指标;然后通过主成分分析方法进行权重求解,消除了指标间的影响,使各指标权重更加客观;最后构建基于白化权函数的灰色聚类模型对3个城市2004~2015年的生态安全状态进行评价。评价结果表明:3个城市2004~2015年间生态安全水平总体呈上升趋势,生态安全状态不断好转。

RESEARCH ON ECOLOGICAL SECURITY EVALUATION OF THE CORE CITIESIN YANGTZE RIVER ECONOMIC BELT BASED ON GREY CLUSTERING METHOD

In this research,some core cities in the Yangtze RiverEconomic Beltwereselected as the case study,such as Wuhan,Shanghai and Chongqing.Firstly,the PSR model was used to build up the framework ofthe index systemof ecologicalsecurity evaluation with the characteristics of the area in the Yangtze RiverEconomic Belt.,which consisted of target,criterion and indexlayers,including totally31 indicators.Then the principal componentanalysis method was adopted to determine the weight of the index,so as to reduce the influence among the indexes and makethe weights of the indicators moreobjective.Finally,the gray clustering model based on the whitening weight function wasconstructed to assess ecological securitystatus of the three cities from 2004 to 2015.The results show that the level of ecological security the three citieshas been increasedfrom 2004 to 2015,and the ecological security status has been improved.