## 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. |

### From inside the book

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Page xvii

Existing books are edited volumes containing specialized contributions or monographs that focus only on

Existing books are edited volumes containing specialized contributions or monographs that focus only on

**specific**areas of fuzzy sets, such as pattern recognition [Bezdek 1981), switching functions [Kandel and Lee 1979), ... Page xviii

For the interested or more advanced reader, numerous references to recent literature are included that should facilitate studies of

For the interested or more advanced reader, numerous references to recent literature are included that should facilitate studies of

**specific**areas in more detail and on a more advanced level. The second volume is dedicated to the ... Page xxiii

The still very strong activities in the theoretical direction lead to more and more very

The still very strong activities in the theoretical direction lead to more and more very

**specific**mathematical developments, which is natural, legitimate and certainly also important. The applicational relevance of these research ... Page 6

There are numerous methods and theories which claim to be the only proper tool to model uncertainties. In general, however, they do not even define sufficiently or only in a very

There are numerous methods and theories which claim to be the only proper tool to model uncertainties. In general, however, they do not even define sufficiently or only in a very

**specific**and limited sense what is meant by “uncertainty” ... Page 7

In this sense fuzzy set theory is certainly also one of the theories which can be used to model

In this sense fuzzy set theory is certainly also one of the theories which can be used to model

**specific**types of uncertainty under**specific**types of circumstances. It might then compete with other theories, but it might also be the ...### What people are saying - Write a review

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### Contents

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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