On the Roughness of Knowledge Based on Granularity

Granular computing is emerging as a powerful tool for rough set theory.The theory of rough-set points out that knowledge has granularity and defines the concept of roughness of knowledge.It's well known that the difficulties of system-developing lie in the acquisition of knowledge.From the granularity,recognizability and importance of knowledge,studies the relationship between the roughness of knowledge and its priciple of granularity,puts forward a method of acquiring knowledge based on the importance of attributes,and proves the feasibility of this merthod through theory and experiments.