By Werner Peeters (auth.), Robert Lowen, Alain Verschoren (eds.)
This is a entire evaluate of the fundamentals of fuzzy keep an eye on, which additionally brings jointly a few contemporary study ends up in gentle computing, particularly fuzzy good judgment utilizing genetic algorithms and neural networks.
This e-book deals researchers not just a pretty good heritage but in addition a picture of the present state-of-the-art during this field.
Read Online or Download Foundations of Generic Optimization: Volume 2: Applications of Fuzzy Control, Genetic Algorithms and Neural Networks PDF
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Extra resources for Foundations of Generic Optimization: Volume 2: Applications of Fuzzy Control, Genetic Algorithms and Neural Networks
94 The reverse transformation, which can be used on the output value, is then given by ⎧ ⎨ (α + 1)y − 1 if y ≥ 0 α y g(y) = ⎩ − (α + 1) − 1 if y ≤ 0 α The rule base can then be written as statements using the linguistic variables, which makes them easy to read and interpret. For instance, feasible heuristic rules would then be IF (E is NB) and (∆E is NB) THEN (U is PB) IF (E is NM) and (∆E is NB) THEN (U is PM) IF (E is NS) and (∆E is NB) THEN (U is PM) IF (E is PM) and (∆E is NM) THEN (U is ZE) etc.
The goal is then to make D(µ ) act as an element of X which approaches the semantic essence of the fuzzy set µ as good as possible. 1 Criteria It may be handy to make some preliminary demands on which conditions a good defuzzification operator D should satisfy. It will be practically impossible to find a defuzzification operator which satisfies all conditions, so it is of the utmost importance that we should select beforehand which criteria will be of importance in our particular application. A nice description of these defuzzification criteria can be found in W.
For further information, we refer to works as [63, 84, 145] and . g. by comparing the output results to a given desired output. 1. For instance, rules like 24 W. Peeters ... n : IF (E is PB) and (∆E is PM) THEN (U is NB) n + 1 : IF (E is PM) and (∆E is NM) THEN (U is ZE) ... will then be rewritten as ... n : IF (E is PB) and (∆E is PM) THEN (P is small) n + 1 : IF (E is PM) and (∆E is NM) THEN (P is large) ... The reverse, where the rules that yield a performance measure are translated into a set of possible correction actions, is also possible, of course, although the (poor) quality of performance does not indicate in which direction action should be taken.