## 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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**Possible**data structure in the plane. Performance of cluster criteria. Dendogram for hierarchical clusters. 189 191 205 205 209 212 215 216 217 218 220 221 ... Page xvi

... it succeeds in providing an excellent introduction to the theory of fuzzy sets—an introduction that makes it

... it succeeds in providing an excellent introduction to the theory of fuzzy sets—an introduction that makes it

**possible**for an uninitiated reader to ... Page xviii

I am also indebted to Kluwer Academic Publishers for making the publication of this book

I am also indebted to Kluwer Academic Publishers for making the publication of this book

**possible**. H.-J. Zimmermann Since this book was first published in ... Page xx

It tries to introduce fuzzy set theory as comprehensively as

It tries to introduce fuzzy set theory as comprehensively as

**possible**, without delving into very theoretical areas or presenting any mathematical proofs ... Page 7

... or of technical systems it is often not

... or of technical systems it is often not

**possible**to either store all relevant data, or to present masses of data to a human observer in such a way, ...### What people are saying - Write a review

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### Contents

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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