Results 241 to 250 of about 9,038 (265)

Fuzzy Closeness Relation as a Basis for Weakening Fuzzy Relational Queries

2004
Query weakening is the modification of the conditions involved in a query in order to obtain a less restrictive variant and then a non empty set of answers. The aim of the paper is to propose an approach for dealing with this problem in the case of fuzzy queries against relational databases.
Patrick Bosc, Allel HadjAli, Olivier Pivert   +2 more
openaire   +1 more source

On a fuzzy bipolar relational algebra

Information Sciences, 2013
This paper presents an extension of relational algebra suitable for the handling of bipolar concepts. The type of queries considered involves two parts: a first one which expresses a (possibly flexible) constraint, and a second one that corresponds to a (possibly flexible) wish.
Bosc, Patrick, Pivert, Olivier
openaire   +2 more sources

Fuzzy relations and fuzzy functions

Fuzzy Sets and Systems, 1986
The author introduces, on a complete Brouwerian lattice L, interesting definitions of L-valued fuzzy equivalence relation, L-valued fuzzy function, L-fuzzy partition, and he goes deeply into their links. Noteworthy consequence of this new definition is that L-fuzzy-functions, so defined, assume values in a Boolean subalgebra of the lattice L. Later the
openaire   +2 more sources

Fuzzy Relations and Fuzzy Graphs

1985
Fuzzy relations are fuzzy subsets of X × Y, that is, mappings from X → Y. They have been studied by a number of authors, in particular by Zadeh [1965, 1971], Kaufmann [1975], and Rosenfeld [1975]. Applications of fuzzy relations are widespread and important. We shall consider some of them and point to more possible uses at the end of this chapter.
openaire   +1 more source

Incomplete fuzzy linguistic preference relations under uncertain environments

Information Fusion, 2010
Tien-Chin Wang
exaly  

Fuzzy Decision-Making Based on Likelihood-Based Comparison Relations

IEEE Transactions on Fuzzy Systems, 2010
Shyi-Ming Chen, Li-Wei Lee
exaly  

Some issues on consistency of fuzzy preference relations

European Journal of Operational Research, 2004
FRANCISCO Chiclana, FRANCISCO Herrera, Enrique Herrera-Viedma   +2 more
exaly  

Fuzzy multiple attributes group decision-making based on fuzzy preference relations

Expert Systems With Applications, 2011
Shyi-Ming Chen
exaly  

On type-2 fuzzy relations and interval-valued type-2 fuzzy sets

Fuzzy Sets and Systems, 2014
Chun Yong Wang, Bao Qing Hu
exaly  

Similarity relations, fuzzy partitions, and fuzzy orderings

Fuzzy Sets and Systems, 1991
Sergei Ovchinnikov
exaly