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13.240 Articles in journals published by the UPC
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Weakening of fuzzy relational queries: an absolute proximity relation-based approach

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Bosc, P.
HadjAli, A.
Pivert, O.
Document typeArticle
Defense date2007
PublisherUniversitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica
Mathware & Soft Computing. 2007, vol. 14, núm. 1
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
In this paper we address the problem of query failure in the context of flexible querying. We propose a fuzzy set–based approach for relaxing queries involving gradual predicates. This approach relies on the notion of proximity relation which is defined in an absolute way. We show how such proximity relation allows for transforming a given predicate into an enlarged one. The resulting predicate is semantically not far from the original one and it is obtained by a simple fuzzy arithmetic operation. The main features of the weakening mechanism are investigated and a comparative study with some methods proposed for the purpose of fuzzy query weakening is presented as well. Last, an example is provided to illustrate our proposal in the case of conjunctive queries.
CitationBosc, P.; HadjAli, A.; Pivert, O. Weakening of fuzzy relational queries: an absolute proximity relation-based approach. "Mathware & Soft Computing", vol. 14, núm. 1, p. 35-55. 
URIhttp://hdl.handle.net/2099/10927
ISSN1134-5632
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