volume 39, issue 7, P1415-1423 2005
DOI: 10.1016/j.watres.2005.01.014
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Yi-Ting Liou, Shang-Lien Lo

Abstract: An index model for quality evaluation based on the formula of similarity membership functions in the fuzzy c-means (FCM) clustering algorithm is proposed. Summing up the weighted similarity degrees between an observation and designed specific quality-ordered levels develops an alternative overall index. Stretching the values of the controlling parameters in the formula of the similarity membership functions causes diverse patterns of overall index models. Applying this proposed fuzzy index model to the trophic…

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