Reduced-set vector learning based on hybrid kernels for interval type 2 fuzzy modeling

Authors:
Long Yu;Jian Xiao;Song Wang
Affiliations:
School of Electrical Engineering, Southwest Jiaotong University, Chengdu, China;School of Electrical Engineering, Southwest Jiaotong University, Chengdu, China;School of Electrical Engineering, Southwest Jiaotong University, Chengdu, China
Venue:
ICS'08 Proceedings of the 12th WSEAS international conference on Systems
Year:
2008

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Abstract

This paper presents a new interval type-2 fuzzy inference system to handle uncertainty using reduced-set vector learning mechanism based on hybrid kernels. Firstly, a novel concept, interval kernel, is proposed. It establishes a relationship between interval type-2 fuzzy membership and hybrid kernel. According to it, a particular interval type-2 fuzzy inference system is built, which abandons traditional type reduction procedure and utilizes directly defuzzification after inference. Subsequently, the model optimization is realized via a hybrid learning mechanism involving two sub-algorithms: bottom-up simplification algorithm and quadratic programming combined with back propagation algorithm. At last, simulation results show that the interval type-2 fuzzy model obtained possesses nice generalization and transparency.