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《Journal of Safety and Environment》 2010-02
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Attribute recognition model based on coefficient of entropy and its application to the water quality dynamic evaluation

DUAN Xiao-feng~1,SUN Bao-nian~2,LI Jia-jun~2,XU Xue-gong~1, YANG Shu-yuan~2,XIE Zheng-lei~1 (1 Laboratory for Earth Surface Processes,the Ministry of Education, College of Urban and Environmental Sciences,Peking University, Beijing 100871,China;2 Dagang Environmental Protection Bureau, Tianjin 300270,China)  
The paper wishes to introduce its author's study on the attribute recognition model based on coefficient of entropy and its application to the water quality dynamic evaluation.As we know, the dynamic variation of water quality can reflect the changes of main environmental indexes and the water quality of a river section or a pond or a lake during a certain period of time, which is of great significance in urban and regional water environment protection and the planning of controlling measures.In order to overcome the weakness or defects of subjectivity in determining weight coefficient of water comprehensive evaluation method, it is of great significance to learn the said recognition model so as to be able to evaluate the water quality dynamics of the 7 river sections in Dagang District under the municipality of Tianjin.However, the weight coefficient should be determined by the entropy method, whose external evaluation of the effective information shall be provided by all the sample data.Therefore, it should not only provide comprehensive grades, but also reflect the differences of the water in quality of the same water grade by calculating the quality value.The results of our investigation show that the 7 river sections, the main sewage drainage rivers of Dagang district, are highly contaminated;comprehensive water quality grade of the 7 river sections is grade V during the most monitoring periods.
【Fund】: 国家自然科学基金重点项目(40830746);; 面上项目(40671001)
【CateGory Index】: X824
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