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    Chapter and Conference Paper

    An Efficient Algorithm for Pawlak Reduction Based on Simplified Discernibility Matrix

    Since the definition of attribute reduction based on classic discernibility matrix is different from the definition of attribute reduction based on positive region, simplified discernibility matrix and the cor...

    Zhang-yan Xu, Bing-ru Yang in Fuzzy Information and Engineering (2009)

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    Chapter and Conference Paper

    A Portfolio Selection Problem with Fuzzy Return Rate

    The aim of this paper is to develop a portfolio selection model with fuzzy return rate. Fuzzy number is used to model the anticipative return rate of security, and an index is defined to measure the variabilit...

    Ruo-ning Xu, **ao-yan Zhai in Fuzzy Information and Engineering (2009)