fuzzy preference queries to relational databases

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Fuzzy Preference Queries To Relational Databases

Author : Olivier Pivert
ISBN : 9781908977595
Genre : Computers
File Size : 59. 22 MB
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The manipulation of databases is an integral part of a world which is becoming increasingly and pervasively information-focused. This book puts forward a suggestion to advocate preference queries and fuzzy sets as a central concern in database queries and offers an important contribution to the design of intelligent information systems. It provides a comprehensive study on fuzzy preference queries in the context of relational databases. Preference queries, a recent hot topic in database research, provide a basis for rank-ordering the items retrieved, which is especially valuable for large sets of answers. This book aims to show that fuzzy set theory constitutes a highly expressive framework for modeling preference queries. It presents a study of the algorithmic aspects related to the evaluation of such queries in order to demonstrate that this framework offers a good trade-off between expressivity and efficiency. Numerous examples and proofs are liberally and lucidly demonstrated throughout, and greatly enhance the detailed theoretical aspects explored in the book. Researchers working in databases will greatly benefit from this comprehensive and up-to-date study of fuzzy preference queries, and it will also become an invaluable reference point for postgraduate students interested in advanced database techniques. The only other books which deal with this topic are edited books or conference proceedings which include a few contributions about some specific aspects of the question. This book provides a comprehensive view of the issue, starting with basic notions related to relational databases and fuzzy set theory, up to the detailed study of complex fuzzy queries and the way they can be efficiently processed. It is the compendium of more than 20 years of research by the authors who benefit from a great international recognition in the domain of intelligent information systems, on the subject. Contents:IntroductionReminders on Relational DatabasesBasic Notions on Fuzzy SetsNon-Fuzzy Approaches to Preference Queries: A Brief OverviewSimple Fuzzy QueriesFuzzy Queries Involving Quantified Statements or AggregatesDivision and Antidivision of Fuzzy RelationsBipolar Fuzzy QueriesFuzzy Group ByEmpty and Plethoric Answers Readership: Postgraduate students and researchers interested in advanced database techniques and database practitioners. Keywords:Database Preference Queries;Fuzzy Queries;Relational Databases;Fuzzy Sets;Fuzzy Logic;Database Querying;SQLf;Bipolarity;Fuzzy Quantifiers;Aggregate Queries;Division Queries;Fuzzy Group-By;Intelligent Information Systems;Cooperative Answering;Query Relaxation;Empty Answers;Plethoric Answers;Query ProcessingReviews:“The presentation is self-contained, and numerous examples and proofs are included.”Zentralblatt MATH

Information Processing And Management Of Uncertainty In Knowledge Based Systems

Author : Eyke Hüllermeier
ISBN : 9783642140570
Genre : Computers
File Size : 89. 53 MB
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Flexible Approaches In Data Information And Knowledge Management

Author : Olivier Pivert
ISBN : 9783319009544
Genre : Computers
File Size : 50. 94 MB
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This volume showcases contributions from internationally-known researchers in the field of information management. Most of the approaches presented here make use of fuzzy logic, introduced by L.A. Zadeh almost 50 years ago, which constitute a powerful tool to model and handle gradual concepts. What all of these contributions have in common is placing the user at the center of the information system, be it for helping him/her to query a data set, to handle imperfect information, or to discover useful knowledge from a massive collection of data. Researchers working in data and knowledge management will greatly benefit from this collection of up-to-date studies. This may be also an invaluable source of information for postgraduate students interested in advanced information management techniques.

Theoretical Advances And Applications Of Fuzzy Logic And Soft Computing

Author : Oscar Castillo
ISBN : 9783540724346
Genre : Mathematics
File Size : 84. 25 MB
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This book comprises a selection of papers on theoretical advances and applications of fuzzy logic and soft computing from the IFSA 2007 World Congress, held in Cancun, Mexico, June 2007. These papers constitute an important contribution to the theory and applications of fuzzy logic and soft computing methodologies.

Flexible Query Answering Systems

Author : Henrik Legind Larsen
ISBN : 9783642407697
Genre : Computers
File Size : 20. 55 MB
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This book constitutes the refereed proceedings of the 10th International Conference on Flexible Query Answering Systems, FQAS 2013, held in Granada, Spain, in September 2013. The 59 full papers included in this volume were carefully reviewed and selected from numerous submissions. The papers are organized in a general session train and a parallel special session track. The general session train covers the following topics: querying-answering systems; semantic technology; patterns and classification; personalization and recommender systems; searching and ranking; and Web and human-computer interaction. The special track covers some specific and, typically, newer fields, namely: environmental scanning for strategic early warning; generating linguistic descriptions of data; advances in fuzzy querying and fuzzy databases: theory and applications; fusion and ensemble techniques for online learning on data streams; and intelligent information extraction from texts.

Database And Expert Systems Applications

Author : Sourav S. Bhowmick
ISBN : 9783540856535
Genre : Computers
File Size : 40. 18 MB
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Conceptual Structures For Knowledge Creation And Communication

Author : Aldo de Moor
ISBN : 3540405763
Genre : Computers
File Size : 23. 66 MB
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The book constitutes the refereed proceedings of the 11th International Conference on Conceptual Structures, ICCS 2003, held in Dresden, Germany in July 2003. The 23 revised full papers presented together with 5 invited papers were carefully reviewed and selected for presentation. The papers are organized in topical sections on the many facets of conceptual structures, logical and linguistic aspects, conceptual representation of time and space, deepening the formal theory and applications of conceptual structures.

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