水质综合评价的投影寻踪模型.pdfVIP

第 21 卷第 4 期 环 　境 　科 　学 　学 　报 Vol. 21 ,No. 4 2001 年 7 月 ACTA SCIENTIAE CIRCUMSTANTIAE July ,2001 ( ) 文章编号 2001 　　　中图分类号:X8202 　　　文献标识码 :A 水质综合评价的投影寻踪模型 1 2 3 ( 1 合肥工业大学土建学院 ,合肥 　230009 ;2 中科院科技政策与管理科学 金菊良 ,魏一鸣 ,丁　晶 　 所 ,北京　100080 ;3 四川大学,成都　610065) 摘要 :为检验水质评价标准的合理性 ,解决各单项水质指标评价结果的不相容问题 ,提高水质评价模型的分辨率 ,提出了一 种新的模型———投影寻踪模型 ,它的评价结果是实数值. 实例的计算结果说明 ,该方案是有效的和通用的 ,可应用于各种环 境质量综合评价中. 关键词 :水质综合评价 ;投影寻踪 ;遗传算法 Projection pursuit model for comprehensive evaluation of water quality 1 2 3 ( J IN Juliang , WEI Yiming , DINGJing 　 1. Hefei University of Technology ,Hefei 230009 ;2. Institute of Policy Management , ) Chinese Academy of Sciences ,Beijing 100080 ;3. Sichuan University ,Chengdu 610065 Abstract :In order to test the evaluation criterions of water quality ,to resolve the nonuniformity problem of evaluation results of water quality in ( ) dexes ,and to raise the resolution of water quality comprehensive evaluation ,a new modelprojection pursuit PP model is suggested ,where the evaluation results are real numbers. A scheme of PP modeling is also presented to reduce the computational amount ,a newfunction of projection indexes is given ,and it is suggested that both the function of projection indexes and the parameters of PP model can be optimized by using real coding based genetic algorithm. The calculation example shows that the scheme is effective and general ,which can be applied to comprehensive evaluation of other environmental