Articoli correlati a Uncertainty in Multi-Source Databases: 130

Uncertainty in Multi-Source Databases: 130 - Rilegato

Nair, Premchand S.

 
9783540032427: Uncertainty in Multi-Source Databases: 130
Rilegato
ISBN 10: 3540032428 ISBN 13: 9783540032427
Casa editrice: Springer Verlag, 2003

Sinossi

Database and database systems have become an essential part of everyday life, such as in banking activities, online shopping, or reservations of airline tickets and hotels. These trends place more demands on the capabilities of future database systems, which need to evolve into decision making systems based on data from multiple sources with varying reliability. In this book a model for the next generation of database systems is presented. It is demonstrated how to quantize favorable and unfavorable qualitative facts so that they can be stored and processed efficiently, as well as how to use the reliability of the contributing sources in our decision makings. The concept of a confidence index set (ciset), is introduced in order to mathematically model the above issues. A simple introduction to relational database systems is given allowing anyone with no background in database theory to appreciate the further contents of this work, especially the extended relational operations and semantics of the ciset relational database model.

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Contenuti

1 Ciset.- 1.1 Confidence Index.- 1.2 Confidence Index Set.- 1.3 Basic Operations.- 1.4 Relations.- 2 The Relational Model.- 2.1 Formalization of Relation.- 2.2 Integrity Constraints.- 2.3 The Relational Operators.- 3 The Ciset Relational Model.- 3.1 Formalization of Ciset Relation.- 3.2 Integrity Constraints.- 4 The Ciset Relational Algebra.- 4.1 Union, Intersection and Difference.- 4.2 Select and Project.- 4.3 Product and Join.- 4.4 Equi-join and Theta-join.- 4.5 Divide.- 5 Alternate Worlds.- 5.1 Introduction.- 5.2 Precision of Ciset Relational Operations.- 6 Additional Ciset Operations.- 6.1 Confidence Index Operations.- 6.2 Ciset Operations.- 6.3 C-relations.- 7 Information Source Tracking.- 7.1 The IST Model.- 7.2 Alternate Worlds.- 7.3 Extended Relational Algebra Operations.- 7.4 Probabilistic Approach.- References.- List of Figures.- List of Tables.

Product Description

Book by Nair Premchand S

Le informazioni nella sezione "Su questo libro" possono far riferimento a edizioni diverse di questo titolo.

Editore
Springer Verlag
Data di pubblicazione
2003
Lingua
Inglese
ISBN 10 
3540032428
ISBN 13 
9783540032427
Rilegatura
Copertina rigida
Numero di pagine
188
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