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《Journal of Safety and Environment》 2005-01
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Application of improved gray relation analysis method for water quality assessment in aquatic system

ZHAO Tian-yan, HE Fang-sheng, HOU Qi-zong, LIANG Ai-ping(Resource and Environmental Engineering College, Wuhan University of Technology, Wuhan 430070, China)  
This paper aims at introducing the author's research on the environmental assessment method, especially on the water quality assessment. In the article, the gray relation analysis method is first of all introduced together with its widely existing various disadvantages. Then we have analyzed and divided the pollution indexes of every section into several definite low level subsets. By way of normalizing the respective elements, the corresponding relational coefficients are figured out. Next, relational grades of the lower level subsets are sorted out through vesting certain weight to every element, and finally the relational grades of the higher level have been gained and established with a list of relational coefficient matrix. Thus it would be easy to find the level of water quality of each section. In addition, through exemplary illustration and comparison with other current methods for gray relation analysis, ours is better than the other existing ones.
【CateGory Index】: X824
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