4.7 Article

Constructing accurate and parsimonious fuzzy models with distinguishable fuzzy sets based on an entropy measure

期刊

FUZZY SETS AND SYSTEMS
卷 157, 期 8, 页码 1057-1074

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ELSEVIER
DOI: 10.1016/j.fss.2005.08.004

关键词

interpretability; distinguishability; fuzzy set merging; entropy; parsimonious fuzzy model

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Parsimony is very important in system modeling as it is closely related to model interpretability. In this paper, a scheme for constructing accurate and parsimonious fuzzy models by generating distinguishable fuzzy sets is proposed, in which the distinguishability of input space partitioning is measured by a so-called local entropy. By maximizing this entropy measure the optimal number of merged fuzzy sets with good distinguishability can be obtained, which leads to a parsimonious input space partitioning while preserving the information of the original fuzzy sets as much as possible. Different from the existing merging algorithms, the proposed scheme takes into account the information provided by input-output samples to optimize input space partitioning. Furthermore, this scheme possesses the ability to seek a balance between the global approximation ability and distinguishability of input space partitioning in constructing Takagi-Sugeno (TS) fuzzy models. Experimental results have shown that this scheme is able to produce accurate and parsimonious fuzzy models with distinguishable fuzzy sets. (c) 2005 Elsevier B.V. All rights reserved.

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