The Research Of The Uncertainty Quest Under The Dominance Relation

This double of rough set model and build on it based on the advantage of information sys-tem and the relationship between the uncoordinated target information system with knowledge reduction of knowledge discovery.Establish a pair of rough set model, and gives a pair of rough set model of basic theory, property, theorem.Given the double domain advantage of information system, the lower and upper ap-proximation relationship between the definition, won the basic nature, The article presents two-domain information system of the definition of the discernibility matrix, Based on the informa-tion system of the obtained reduction method.Presents the theory of double based on the advantage of not coordinate relations defined target information system. The double domain uncoordinated target information system of the upper and lower approximation, further proved it satisfy some properties In this target information system on the distribution function definition and function, Coordinate with the largest collection distribution coordination. With the distribution of concrete examples Defines the discernibility matrix, and the identification of attribute set of information systems arc the target attribute reduction method.