Study on knowledge granularity and relationship between knowledge granularities based on rough sets;

Description and discovery method of manufacture process knowledge granularity;

Web Document Clustering Based on Knowledge Granularity;

Research on Attribute Reduction Based on Granularity of Knowledge in Incomplete Knowledge Systems and Its Application;

Proposed the concept of granule amount of knowledge,granule seed and granularity,proved its dull relation between knowledge roughness and its correspondent granularity in rough set theory,declared that knowledge roughness is closely related to granule amount of knowledge,granule seed of knowledge and granularity of knowledge.

Based on variable precision rough set theory, this paper discusses granularity of knowledge in with approximation and quality of classification, then presents that a nested sequence of equivalence relations can lead to a hierarchical granulation on various levels of confidence β and quality of classification γ.

Based on decision table,the paper discusses its internal granular essence,researches the relationship between knowledge granulation and the number of attributes or the change of attribute value,and establishes the dynamic relation between knowledge granulation and the credibility of rules.

The relationships among knowledge granulation,information quantity and class feature matrices were discussed.

The nature to realize the knowledge discovery with the tool was found,it is to hold the knowledge inclusive relations in the knowledge over universe and sizes of the knowledge particles.