Title :
Rough approximations in formal contexts
Author :
Li, Tong-jun ; Zhang, Wen-xiu
Author_Institution :
Inst. for Inf. & Syst. Sci., Xi´´an Jiaotong Univ., China
Abstract :
In this paper, relationships between the rough set theory and the formal concept analysis are discussed. By using some coverings and binary relations on the object set, and a heterogeneous relation of a formal context, several types of rough approximation operators on the object set are introduced. Then properties of the approximation operators are examined and the connections between the approximation operators and formal concepts are further established.
Keywords :
approximation theory; data analysis; rough set theory; binary relation; formal concept analysis; formal context; object set; rough approximation operator; rough set theory; Cybernetics; Data analysis; Educational institutions; Joining processes; Machine learning; Object oriented modeling; Oceans; Rough sets; Set theory; Rough sets; binary relations; formal concept; modal-style operators;
Conference_Titel :
Machine Learning and Cybernetics, 2005. Proceedings of 2005 International Conference on
Conference_Location :
Guangzhou, China
Print_ISBN :
0-7803-9091-1
DOI :
10.1109/ICMLC.2005.1527487
