Gaussian Qualitative Trigonometric Functions in a Fuzzy Circle

We build a bridge between qualitative representation and quantitative representation using fuzzy qualitative trigonometry. A unit circle obtained from fuzzy qualitative representation replaces the quantitative unit circle. Namely, we have developed the concept of a qualitative unit circle from the v...

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Main Authors: M. Clement Joe Anand, Janani Bharatraj
Format: Article
Language:English
Published: Wiley 2018-01-01
Series:Advances in Fuzzy Systems
Online Access:http://dx.doi.org/10.1155/2018/8623465
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author M. Clement Joe Anand
Janani Bharatraj
author_facet M. Clement Joe Anand
Janani Bharatraj
author_sort M. Clement Joe Anand
collection DOAJ
description We build a bridge between qualitative representation and quantitative representation using fuzzy qualitative trigonometry. A unit circle obtained from fuzzy qualitative representation replaces the quantitative unit circle. Namely, we have developed the concept of a qualitative unit circle from the view of fuzzy theory using Gaussian membership functions, which play a key role in shaping the fuzzy circle and help in obtaining sharper boundaries. We have also developed the trigonometric identities based on qualitative representation by defining trigonometric functions qualitatively and applied the concept to fuzzy particle swarm optimization using α-cuts.
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spelling doaj-art-5fbf42b69f1c4fb4a84241664afe79392025-02-03T01:03:24ZengWileyAdvances in Fuzzy Systems1687-71011687-711X2018-01-01201810.1155/2018/86234658623465Gaussian Qualitative Trigonometric Functions in a Fuzzy CircleM. Clement Joe Anand0Janani Bharatraj1Department of Mathematics, Hindustan Institute of Technology and Science (Deemed to be University), Chennai 603103, IndiaDepartment of Mathematics, Hindustan Institute of Technology and Science (Deemed to be University), Chennai 603103, IndiaWe build a bridge between qualitative representation and quantitative representation using fuzzy qualitative trigonometry. A unit circle obtained from fuzzy qualitative representation replaces the quantitative unit circle. Namely, we have developed the concept of a qualitative unit circle from the view of fuzzy theory using Gaussian membership functions, which play a key role in shaping the fuzzy circle and help in obtaining sharper boundaries. We have also developed the trigonometric identities based on qualitative representation by defining trigonometric functions qualitatively and applied the concept to fuzzy particle swarm optimization using α-cuts.http://dx.doi.org/10.1155/2018/8623465
spellingShingle M. Clement Joe Anand
Janani Bharatraj
Gaussian Qualitative Trigonometric Functions in a Fuzzy Circle
Advances in Fuzzy Systems
title Gaussian Qualitative Trigonometric Functions in a Fuzzy Circle
title_full Gaussian Qualitative Trigonometric Functions in a Fuzzy Circle
title_fullStr Gaussian Qualitative Trigonometric Functions in a Fuzzy Circle
title_full_unstemmed Gaussian Qualitative Trigonometric Functions in a Fuzzy Circle
title_short Gaussian Qualitative Trigonometric Functions in a Fuzzy Circle
title_sort gaussian qualitative trigonometric functions in a fuzzy circle
url http://dx.doi.org/10.1155/2018/8623465
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