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How to Obtain the Fulfilment Degrees of a Query Using Fuzzy Relational Calculus

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Knowledge Management in Fuzzy Databases

Part of the book series: Studies in Fuzziness and Soft Computing ((STUDFUZZ,volume 39))

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Abstract

In this paper we present a definition of a Domain Relational Calculus for Fuzzy Relational Databases using the GEFRED model as a starting point. The expressive power of this fuzzy relational calculus is demonstrated through the use of a method to translate any algebraic expression into an equivalent expression in fuzzy domain relational calculus. Furthermore, we include a useful system so that the degree to which each value has satisfied the query condition can be measured. Some examples are also included in order to clarify the definition.

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Author information

Authors and Affiliations

  1. Dpto. Lenguajes y Ciencias de la Computación, Universidad de Málaga, 29071, Málaga, Spain

    José Galindo

  2. Dpto. Ciencias de la Computación e I.A., Universidad de Granada, 18071, Granada, Spain

    Juan Miguel Medina & Juan Carlos Cubero

Authors
  1. José Galindo
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  2. Juan Miguel Medina
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  3. Juan Carlos Cubero
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Editor information

Editors and Affiliations

  1. Departamento de Ciencias de la Computacion e Inteligencia Artificial, E.T.S.I. de Ingenieria Informatica, Universidad de Granada, Avda. de Andalucia n. 38, 18071, Granada, Spain

    Olga Pons  & Maria Amparo Vila  & 

  2. Systems Research Institute, Polish Academy of Sciences, ul. Newelska 6, 01-447, Warsaw, Poland

    Janusz Kacprzyk

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© 2000 Springer-Verlag Berlin Heidelberg

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Galindo, J., Medina, J.M., Cubero, J.C. (2000). How to Obtain the Fulfilment Degrees of a Query Using Fuzzy Relational Calculus. In: Pons, O., Vila, M.A., Kacprzyk, J. (eds) Knowledge Management in Fuzzy Databases. Studies in Fuzziness and Soft Computing, vol 39. Physica, Heidelberg. https://doi.org/10.1007/978-3-7908-1865-9_12

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  • DOI: https://doi.org/10.1007/978-3-7908-1865-9_12

  • Publisher Name: Physica, Heidelberg

  • Print ISBN: 978-3-7908-2467-4

  • Online ISBN: 978-3-7908-1865-9

  • eBook Packages: Springer Book Archive

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