Title :
Fuzzy Comprehensive Evaluation of River Health Using (1/2, 2) EM Method
Author :
Yin, Zhijie ; Guan, Yuhui ; Baron, Alexander ; Geng, Leihura
Author_Institution :
State Key Lab. of Hydrol., Water Resources & Hydraulic Eng., Hohai Univ., Nanjing, China
Abstract :
In this paper, river health evaluation is decomposed into a hierarchical structure. Weights for each index of each grade are determined with the (1/2,2) EM method. The relative membership degree of different evaluation grade standards is then calculated with a fuzzy comprehensive evaluation based on fuzzy theory. The results present a comprehensive evaluation of river health and a scientific basis for river health management.
Keywords :
environmental management; expectation-maximisation algorithm; fuzzy set theory; rivers; EM method; fuzzy comprehensive evaluation; fuzzy theory; river health management; Cultural differences; Environmental factors; Fuzzy sets; Fuzzy systems; Geology; Hydrology; Knowledge engineering; Matrix decomposition; Rivers; Water resources; (1/2; 2) EM method; fuzzy comprehensive evaluation; membership degree; river health;
Conference_Titel :
Fuzzy Systems and Knowledge Discovery, 2009. FSKD '09. Sixth International Conference on
Conference_Location :
Tianjin
Print_ISBN :
978-0-7695-3735-1
DOI :
10.1109/FSKD.2009.135
