In fuzzy information systems, the fuzzification of lower and upper approximations is
discussed, ie, lower and upper approximations are a pair of fuzzy sets. One hand, lower and …

This article mainly focuses on simplifying the structure of interval type-2 (IT2) fuzzy system
and studying its approximation properties. First of all, we construct the interval type-2 vague …

In this paper, a design scheme for the fuzzy controller through width adaptation of the
universe of discourse is presented. The proposed adaptation law, which results from the …

Variable universe is through a group of nonlinear contraction expansion factors online timely
to adjust the input domain, so that the input domain is subdivided as detailed as possible at …

This special issue contains five selected papers. These papers are the extended versions of
the papers presented at NAFIPS 2006, 2006 Annual Conference of the North American …

In the conventional researches, the reliabilities of the fuzzy system are represented and
analyzed by real values between zero and one, fuzzy numbers, intervals of confidence, etc …

For conventional fuzzy systems, Mamdani type or TS type, it is; well known that the number
of fuzzy rules and adjustable parameters exponentially increases with the number of input …

In this paper, the output structure of multiple-input–single-output fuzzy logic controller (FLCr)
is studied. The input and output variables of the FLCr are all characterized by normal …

This paper presents a method of bidirectional interval-valued fuzzy approximate reasoning
by employing a weighted similarity measure between the fact and the antecedent (or …