Advanced Concepts in Fuzzy Logic and Systems with Membership - download pdf or read online

By Janusz T. Starczewski

ISBN-10: 3642295193

ISBN-13: 9783642295195

This e-book generalizes fuzzy common sense structures for various sorts of uncertainty, together with - semantic ambiguity as a result of restricted notion or lack of awareness approximately specified club services - loss of attributes or granularity coming up from discretization of genuine information - vague description of club services - vagueness perceived as fuzzification of conditional attributes. for that reason, the club uncertainty should be modeled by way of combining tools of traditional and type-2 fuzzy good judgment, tough set thought and danger idea.            specifically, this publication offers a couple of formulae for imposing the operation prolonged on fuzzy-valued fuzzy units and offers a few easy constructions of generalized doubtful fuzzy common sense platforms, in addition to introduces a number of of tips on how to generate fuzzy club uncertainty. it's fascinating as a reference publication for under-graduates in better schooling, grasp and healthcare professional graduates within the classes of desktop technological know-how, computational intelligence, or fuzzy keep an eye on and category, and is mainly devoted to researchers and practitioners in undefined.  

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Extra info for Advanced Concepts in Fuzzy Logic and Systems with Membership Uncertainty

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On the contrary, the concept of fuzzy sets introduces an intrinsic vagueness of an object, as for example we cannot describe a yellow color in therms of its wavelength. Some colors may be even ambivalent. Therefore roughness is the problem connected with granularity of X, while fuzziness is the problem of ill-definition of the object itself. The following properties are satisfied by rough sets. 1. 2. 3. 4. 5. R (X) ⊆ X ⊆ R (X), R (∅) = R (∅) = ∅ and R (X) = R (X) = X, R (X ∩ Y ) = R (X) ∩ R (Y ) and R (X ∪ Y ) = R (X) ∪ R (Y ), X ⊆ Y implies that R (X) ⊆ R (Y ) and R (X) ⊆ R (Y ), R (X − X) = X−R (X) and R (X − X) = X−R (X).

1) where φ−1 (w) is the inverse image of w. The extension principle in this first formulation rely on the use of minimum in aggregation of memberships. However any t-norm, T∗ , in the place of the minimum has different properties, as for example an interactivity distinguishes the product t-norm from the minimum [Dubois and Prade 1980]. In this book we mostly look into the extension principle in its more general form [Nguyen 1978]. According to the extension principle, the extended operation is expressed as the least upper bound of the Cartesian product with the non-extended operation as a constraint.

34). 1) to the minimum, the maximum and the continuous, strictly monotone and involutive complement neg(u) ≡ 1 − u. 13) ˜ is characterized where A˜ is characterized by its membership grades Fx , and B by Gx , ∀Fx , Gx ∈ F ([0, 1]), x ∈ R. 2) to model the alternative operations on fuzzy-valued fuzzy sets. 3. Let F and G be fuzzy truth values, with their membership functions f and g, respectively, at x ∈ R, where for simplicity x is omitted, and let T and T∗ be arbitrary t-norms. 15) S(u,v)=w and an extended complementation N is characterized by μN (F ) (w) = sup f (u) .

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Advanced Concepts in Fuzzy Logic and Systems with Membership Uncertainty by Janusz T. Starczewski


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