水资源与水工程学报Issue(6)：156-162,7.DOI:10.11705/j.issn.1672-643X.2014.06.033
基于投影寻踪分类的长江流域水质综合评价模型及其应用模型
Water quality comprehensive evaluation and application model based on projection pursuit clustering in Yangtze river basin
摘要
Abstract
In order to study the water quality and its changing trend of the Yangtze river ( YR) and ac-cording to the eight-index measured data on 103 government-control sections of YR from 2006 to 2010 ( total 515 samples ) and the standards of quality evaluation of groundwater ,the paper established the pro-jection pursuit clustering model of comprehensive evaluation of water quality .The results show that the water quality on the control sections is quite good , the water quality of type I and Ⅱ take up 60%and 22 .7%respectively .The water quality in upperstream is better than that in downstream .The water pol-lution is quite serious in the Chemical-industry developed areas .From 2006 to 2009 , the water quality was gradually improved year by year ,and was the worst in 2010 .The paper researched the rule of influ-ence of cutoff radius R value ( CRRV) on the results of PPC model .The theory analysis show that the scheme of taking the smaller CRRV ( R =0.1 Sz ) is absolutely unreasonable , the larger CRRV ( rmax≤R≤2p) is error, should not be the constant , and only the moderate-suitable value of CRRV (rmax/5≤R≤rmax/3) is reasonable correct .关键词
水质综合评价/投影寻踪建模/投影窗口半径R值/长江水系Key words
water quality comprehensive evaluation/projection pursuit clustering ( PPC ) modelling/cutoff radius R value/Yangtze River分类
资源环境引用本文复制引用
熊聘,楼文高..基于投影寻踪分类的长江流域水质综合评价模型及其应用模型[J].水资源与水工程学报,2014,(6):156-162,7.基金项目
上海高校知识服务平台“上海商贸服务业知识服务中心”项目（ ZF1226）；上海市重点学科“商务经济学”项目 （）
