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Download Evolving Rule-Based Models: A Tool for Design of Flexible by Plamen P. Angelov PDF

By Plamen P. Angelov

The gadgets of modelling and keep an eye on swap as a result of dynamical features, fault improvement or just getting old. there's a have to up-date versions inheriting necessary constitution and parameter details. The booklet supplies an unique option to this challenge with a couple of examples. It treats an unique method of online edition of rule-based types and platforms defined by way of such types. It combines some great benefits of fuzzy rule-based types compatible for the outline of hugely advanced structures with the unique recursive, non iterative means of version evolution with no inevitably utilizing genetic algorithms, therefore fending off computational burden making attainable real-time commercial functions. power purposes diversity from self sufficient platforms, online fault detection and analysis, functionality research to evolving (self-learning) clever selection aid systems.

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This new operator has been validated with a number of usually used numerical test functions as well as with a practical example of supply air temperature and flow rate scheduling in a hollow core ventilated slab thermal storage system (Angelov and Wright, 2000). 4 NON-LINEAR APPROACH TO (OFF-LINE) IDENTIFICATION 53 The tests presented in the third part of the book indicate that it improves results (the speed of convergence as well as the final result) without practically increasing computational expenses.

Data-driven techniques and their combination with expert knowledge represent one possible solution, which in the point of view of the author is most promising. 5 .. 3 x -2 6 Fig. 3. 2 Basic Operations over Fuzzy Sets Without going into details the basic operations over fuzzy sets will be presented briefly as a basis for further considerations. 1 T-norms One of the basic operations over fuzzy sets is the conjunction of two fuzzy sets. 2 S-norms The next basic operation over fuzzy sets is the union.

NR} forms together with thejlexible sets the knowledge base of the linguistic model. The number of all possiblejlexible rules (complete set) for a specified number of linguistic variables and their linguistic terms is extremely high for realistic dimensions (some tens of linguistic variables and linguistic terms), because of the combinatorial explosion called curse of dimensionality (Yager and Filev, 1994). 26) j=l where mi is the number of linguistic terms of the l linguistic variable; TNR - total number of all possible full rules For example, the number of all possible rules which could be formed using 6 variables (n=6) with 9 linguistic terms each is more than 4 millions (TNR=9 7 =4,782,969)!

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