Fuzzy Set Theory—and Its ApplicationsSince its inception, the theory of fuzzy sets has advanced in a variety of ways and in many disciplines. Applications of fuzzy technology can be found in artificial intelligence, computer science, control engineering, decision theory, expert systems, logic, management science, operations research, robotics, and others. Theoretical advances have been made in many directions. The primary goal of Fuzzy Set Theory - and its Applications, Fourth Edition is to provide a textbook for courses in fuzzy set theory, and a book that can be used as an introduction. To balance the character of a textbook with the dynamic nature of this research, many useful references have been added to develop a deeper understanding for the interested reader. Fuzzy Set Theory - and its Applications, Fourth Edition updates the research agenda with chapters on possibility theory, fuzzy logic and approximate reasoning, expert systems, fuzzy control, fuzzy data analysis, decision making and fuzzy set models in operations research. Chapters have been updated and extended exercises are included. |
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Page 16
We shall first present the concepts suggested by Zadeh in 1965 [Zadeh 1965, p. 310]. They constitute a consistent framework for the theory of fuzzy sets. They are, however, not the only possible way to extend classical set theory ...
We shall first present the concepts suggested by Zadeh in 1965 [Zadeh 1965, p. 310]. They constitute a consistent framework for the theory of fuzzy sets. They are, however, not the only possible way to extend classical set theory ...
Page 24
52] therefore suggested the notion of a fuzzy set whose membership function itself is a fuzzy set. If we call fuzzy sets, such as those considered so far, type 1 fuzzy sets, then a type 2 fuzzy set can be defined as follows.
52] therefore suggested the notion of a fuzzy set whose membership function itself is a fuzzy set. If we call fuzzy sets, such as those considered so far, type 1 fuzzy sets, then a type 2 fuzzy set can be defined as follows.
Page 29
Other operators have also been suggested. These suggestions vary with respect to the generality or adaptibility of the operators as well as to the degree to which and how they are justified. Justification ranges from intuitive ...
Other operators have also been suggested. These suggestions vary with respect to the generality or adaptibility of the operators as well as to the degree to which and how they are justified. Justification ranges from intuitive ...
Page 30
For the union of fuzzy sets, the max-operator, the algebraic sum [Zadeh 1965), and the “bold union” [Giles 1976]—modeled by the “bounded sum”—have been suggested. Corresponding to the class of intersection operators, a general class of ...
For the union of fuzzy sets, the max-operator, the algebraic sum [Zadeh 1965), and the “bold union” [Giles 1976]—modeled by the “bounded sum”—have been suggested. Corresponding to the class of intersection operators, a general class of ...
Page 32
To this end, different authors suggested parameterized families of t-norms and t-conorms, often maintaining the associativity property. For illustration purposes, we review some interesting parameterized operators.
To this end, different authors suggested parameterized families of t-norms and t-conorms, often maintaining the associativity property. For illustration purposes, we review some interesting parameterized operators.
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Contents
9 | |
11 | |
16 | |
22 | |
29 | |
Criteria for Selecting Appropriate Aggregation Operators | 43 |
The Extension Principle and Applications | 54 |
Special Extended Operations | 61 |
Applicationoriented Modeling of Uncertainty | 111 |
Linguistic Variables | 140 |
Fuzzy Data Bases and Queries | 265 |
Decision Making in Fuzzy Environments | 329 |
Applications of Fuzzy Sets in Engineering and Management | 371 |
Empirical Research in Fuzzy Set Theory | 443 |
Future Perspectives | 477 |
181 | 485 |
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Common terms and phrases
aggregation algorithm analysis applications approach appropriate approximately areas assignment assume base called chapter classical clustering compute concepts considered constraints contains corresponding crisp criteria customers decision defined definition degree of membership depends described determine discussed distribution domain elements engineering example exist expert systems expressed extension Figure fuzzy control fuzzy numbers fuzzy set theory given goal human important indicate inference input instance integral interpreted intersection interval knowledge linguistic variable logic mathematical mean measure membership function methods normally objective objective function observed obtain operators optimal positive possible probability problem programming properties provides reasoning relation representing require respect rules scale shown shows similarity situation solution space specific statement structure suggested t-norms Table tion true truth uncertainty values Zadeh