Weighted approximation of fuzzy numbers by using m-n-step type fuzzy number
Publish place: Iranian Journal of Fuzzy Systems، Vol: 20، Issue: 3
Publish Year: 1402
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJFS-20-3_010
تاریخ نمایه سازی: 2 خرداد 1402
Abstract:
In this paper, based on the weighted metric, the problem of approximating a general continuous fuzzy number u with derivable \underline{u}(r) and \overline{u}(r) (left and right cut functions of level value r) for r \in (۰,۱] by using the m-n-step type fuzzy number is studied. Two kinds of approximations (I-nearest approximation and II-nearest approximation which satisfy different conditions) of using m-n-step type fuzzy numbers to approximate general continuous fuzzy numbers are defined, and the relationship between the I-nearest approximation and II-nearest approximation is obtained. Then the methods of the two kinds of approximations are respectively presented by the theorems more specifically. At last, an example is given to show the effectiveness and usability of the methods set up by us.
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Authors
Y. Zhu
Institute of Operations Research and Cybernetics, Hangzhou Dianzi University, Hangzhou, China
G. X. Wang
Institute of Operations Research and Cybernetics, Hangzhou Dianzi University, Hangzhou, China
C. J. Li
Institute of Operations Research and Cybernetics, Hangzhou Dianzi University, Hangzhou, China
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