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Data & Knowledge Engineering
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On generalized intuitionistic fuzzy rough approximation operators
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Approximations and reducts with covering generalized rough sets
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Generalized fuzzy rough approximation operators based on fuzzy coverings
International Journal of Approximate Reasoning
Axiomatic systems for rough sets and fuzzy rough sets
International Journal of Approximate Reasoning
Measures of general fuzzy rough sets on a probabilistic space
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Generalized fuzzy rough sets determined by a triangular norm
Information Sciences: an International Journal
Communicating between information systems
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Neighborhood rough set based heterogeneous feature subset selection
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Rough approximation operators on two universes of discourse and their fuzzy extensions
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CEEMAS '07 Proceedings of the 5th international Central and Eastern European conference on Multi-Agent Systems and Applications V
Valued Hesitation in Intervals Comparison
SUM '07 Proceedings of the 1st international conference on Scalable Uncertainty Management
Attribute Reduction Based on the Fuzzy Information Filter Operators
ICIC '08 Proceedings of the 4th international conference on Intelligent Computing: Advanced Intelligent Computing Theories and Applications - with Aspects of Artificial Intelligence
Relationship between generalized rough sets based on binary relation and covering
Information Sciences: an International Journal
An Equivalent Definition of Rough Sets
RSCTC '08 Proceedings of the 6th International Conference on Rough Sets and Current Trends in Computing
Rough Set Approach to Information Tables with Imprecise Decisions
RSCTC '08 Proceedings of the 6th International Conference on Rough Sets and Current Trends in Computing
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International Journal of Approximate Reasoning
Approximation Space and LEM2-like Algorithms for Computing Local Coverings
Fundamenta Informaticae - Concurrency Specification and Programming (CS&P)
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Relationship among basic concepts in covering-based rough sets
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An axiomatic approach of fuzzy rough sets based on residuated lattices
Computers & Mathematics with Applications
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WILF '09 Proceedings of the 8th International Workshop on Fuzzy Logic and Applications
Knowledge Reduction of Covering Approximation Space
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On Fuzzy Rough Set Algebras in Infinite Universes
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Information-Theoretic Measure of Uncertainty in Generalized Fuzzy Rough Sets
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On axiomatic characterizations of three pairs of covering based approximation operators
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The model of fuzzy variable precision rough sets
IEEE Transactions on Fuzzy Systems
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Computers & Mathematics with Applications
A valued tolerance approach to missing attribute values in data mining
HSI'09 Proceedings of the 2nd conference on Human System Interactions
New Approach in Defining Rough Approximations
RSFDGrC '09 Proceedings of the 12th International Conference on Rough Sets, Fuzzy Sets, Data Mining and Granular Computing
Fast Single-Link Clustering Method Based on Tolerance Rough Set Model
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Fuzzy Sets and Systems
The minimization of axiom sets characterizing generalized approximation operators
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FUZZ-IEEE'09 Proceedings of the 18th international conference on Fuzzy Systems
Modeling and Reasoning with Paraconsistent Rough Sets
Fundamenta Informaticae
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WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Reduction about approximation spaces of covering generalized rough sets
International Journal of Approximate Reasoning
Tractable approximate knowledge fusion using the Horn fragment of serial propositional dynamic logic
International Journal of Approximate Reasoning
Analysis on classification performance of rough set based reducts
PRICAI'06 Proceedings of the 9th Pacific Rim international conference on Artificial intelligence
RSKT'07 Proceedings of the 2nd international conference on Rough sets and knowledge technology
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A four-valued logic for rough set-like approximate reasoning
Transactions on rough sets VI
Transactions on rough sets VI
Four-valued extension of rough sets
RSKT'08 Proceedings of the 3rd international conference on Rough sets and knowledge technology
Roughness measures of intuitionistic fuzzy sets
RSKT'08 Proceedings of the 3rd international conference on Rough sets and knowledge technology
IDEAL'09 Proceedings of the 10th international conference on Intelligent data engineering and automated learning
FSKD'09 Proceedings of the 6th international conference on Fuzzy systems and knowledge discovery - Volume 5
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Transactions on computational science II
Local and global approximations for incomplete data
Transactions on rough sets VIII
Information Sciences: an International Journal
Approximation Spaces in Rough-Granular Computing
Fundamenta Informaticae - Understanding Computers' Intelligence Celebrating the 100th Volume of Fundamenta Informaticae in Honour of Helena Rasiowa
Knowledge feature analysis to incomplete information system
CAR'10 Proceedings of the 2nd international Asia conference on Informatics in control, automation and robotics - Volume 1
Research on the model of rough set over dual-universes
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Unit operations in approximation spaces
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The Knowledge Engineering Review
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On lower and upper intension order relations by different cover concepts
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International Journal of Approximate Reasoning
Order compatible fuzzy relations and their elicitation from general fuzzy partitions
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On generalized rough fuzzy approximation operators
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Dialectics of counting and the mathematics of vagueness
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Rough sets based on complete completely distributive lattice
Information Sciences: an International Journal
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This paper proposes new definitions of lower and upper approximations, which are basic concepts of the rough set theory. These definitions follow naturally from the concept of ambiguity introduced in this paper. The new definitions are compared to the classical definitions and are shown to be more general, in the sense that they are the only ones which can be used for any type of indiscernibility or similarity relation.