投影寻踪模型在区域生态环境质量评价中的应用

大量相关因子的简化和降维处理是生态环境质量评价的关键问题之一。而投影寻踪模型可将多个指标投影到线性空间,实现指标的降维处理。本文以巢湖流域生态环境质量综合评价进行了实证分析,巢湖流域生态环境质量为3级,其中合肥市和六安市所属区域生态环境质量为3级,巢湖市为4级。研究表明,应用投影寻踪模型进行区域生态环境质量评价人为干扰少,操作简便,便于在生产实践中应用,为区域生态环境质量评价提供了一条新途径。

Application of projection pursuit model in regional eco-environment quality assessment

One of the difficulties frequently encountered in eco-environment quality assessment is that not one but all the affecting factors associated with eco-environment quality must be used.To overcome this issue,the principle of projection pursuit was introduced,and the projection pursuit cluster(PPC) model that can realize the transition from high dimension to one-dimension was stated in this paper.As an application example,the eco-environment quality assessment of Chaohu Basin in Anhui Province was presented.The eco-environment quality of total Chaohu Basin area,Hefei City and Liu'an City were of grade 3,and that of Chaohu City was of grade 4.The results suggested that PPC model was reasonable and more objective,which could be a powerful tool in complex multifactor analyzing,and a new method for eco-environment quality assessment.