Generalized rough sets over fuzzy lattices
Information Sciences: an International Journal
Rough approximation operators on two universes of discourse and their fuzzy extensions
Fuzzy Sets and Systems
A Development of Inclusion-degree-based Rough Fuzzy Random Sets
Fundamenta Informaticae
Approximation Algebra and Framework
Fundamenta Informaticae - Fundamentals of Knowledge Technology
Reasoning within expressive fuzzy rough description logics
Fuzzy Sets and Systems
Attribute selection with fuzzy decision reducts
Information Sciences: an International Journal
On generalized fuzzy belief functions in infinite spaces
IEEE Transactions on Fuzzy Systems
New approaches to fuzzy-rough feature selection
IEEE Transactions on Fuzzy Systems
Rough set theory based on two universal sets and its applications
Knowledge-Based Systems
Rule extraction with rough-fuzzy hybridization method
PAKDD'08 Proceedings of the 12th Pacific-Asia conference on Advances in knowledge discovery and data mining
A unifying abstract approach for rough models
RSKT'08 Proceedings of the 3rd international conference on Rough sets and knowledge technology
A practical solution for the classification in interval-valued information systems
WSEAS Transactions on Systems and Control
Measures for unsupervised fuzzy-rough feature selection
International Journal of Hybrid Intelligent Systems - Advances in Intelligent Agent Systems
Fuzzy rough set based attribute reduction for information systems with fuzzy decisions
Knowledge-Based Systems
DeLorean: A reasoner for fuzzy OWL 2
Expert Systems with Applications: An International Journal
Generalized fuzzy rough description logics
Information Sciences: an International Journal
Rough Sets, Coverings and Incomplete Information
Fundamenta Informaticae - Advances in Rough Set Theory
On Some Mathematical Structures of T-Fuzzy Rough Set Algebras in Infinite Universes of Discourse
Fundamenta Informaticae - Advances in Rough Set Theory
Approximation Algebra and Framework
Fundamenta Informaticae - Fundamentals of Knowledge Technology
A Development of Inclusion-degree-based Rough Fuzzy Random Sets
Fundamenta Informaticae
International Journal of Approximate Reasoning
Generalized fuzzy rough approximation operators determined by fuzzy implicators
International Journal of Approximate Reasoning
Finding rough and fuzzy-rough set reducts with SAT
Information Sciences: an International Journal
Duality, conjugacy and adjointness of approximation operators in covering-based rough sets
International Journal of Approximate Reasoning
Fuzzy nearest neighbor algorithms: Taxonomy, experimental analysis and prospects
Information Sciences: an International Journal
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Traditional rough set theory uses equivalence relations to compute lower and upper approximations of sets. The corresponding equivalence classes either coincide or are disjoint. This behaviour is lost when moving on to a fuzzy T-equivalence relation. However, none of the existing studies on fuzzy rough set theory tries to exploit the fact that an element can belong to some degree to several "soft similarity classes" at the same time. In this paper we show that taking this truly fuzzy characteristic into account may lead to new and interesting definitions of lower and upper approximations. We explore two of them in detail and we investigate under which conditions they differ from the commonly used definitions. Finally we show the possible practical relevance of the newly introduced approximations for query refinement