Roughness of Sets Involving Dependency of Attributes in Information Systems
نویسنده
چکیده
Rough set theory, proposed by Pawlak in 1980’s as a result of a long term program on mathematical fundamental research can be seen as a new mathematical approach to vagueness (set) and uncertainty (element) from databases (information systems) [1]. One of the important issues in rough set-based database analysis is discovering dependencies between attributes. An attribute dependency states that the value of an attribute is uniquely determined by the values of some other attributes. The objective of discovering attribute dependency is to find the relationship among attributes in information systems. Formally, in an information system f V A U S , , , [1], attribute D is called totally
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تاریخ انتشار 2015