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Exact Membership Functions for the Fuzzy Weighted Average

  • P.M. van den Broek
  • , J.A.R. Noppen

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    218 Downloads (Pure)

    Abstract

    The problem of computing the fuzzy weighted average, where both attributes and weights are fuzzy numbers, is well studied in the literature. Generally, the approach is to apply Zadeh’s extension principle to compute α-cuts of the fuzzy weighted average from the α-cuts of the attributes and weights for fixed values of α∈[0..1]; this means that all values of the membership functions of the fuzzy weighted average are computed separately. In this paper, we generalise this approach in such a way that α is considered to be a parameter; this enables us to compute exact analytical membership functions for the fuzzy weighted average in case the attributes and weights are triangular or trapeizoidal fuzzy numbers. To illustrate the power of our algorithms, they are applied to the examples from the literature, providing exact membership functions in each case.
    Original languageEnglish
    Title of host publicationComputational Intelligence
    Subtitle of host publicationRevised and Selected Papers of the International Joint Conference IJCCI 2009 held in Funchal-Madeira, Portugal, October 2009
    EditorsKurosh Madani, António Dourado Correia, Agostinho Rosa, Joaquim Filipe
    Place of PublicationBerlin, Heidelberg
    PublisherSpringer
    Pages85-99
    Number of pages15
    ISBN (Print)978-3-642-20206-3
    DOIs
    Publication statusPublished - 2011
    EventInternational Joint Conference on Computational Intelligence, IJCCI 2009 - Madeira, Portugal
    Duration: 5 Oct 20097 Oct 2009

    Publication series

    NameStudies in Computational Intelligence
    PublisherSpringer
    Volume343
    ISSN (Print)1860-949X
    ISSN (Electronic)1860-9503

    Conference

    ConferenceInternational Joint Conference on Computational Intelligence, IJCCI 2009
    Abbreviated titleIJCCI
    Country/TerritoryPortugal
    CityMadeira
    Period5/10/097/10/09

    Keywords

    • Fuzzy weighted average
    • Membership functions

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