Expanding tolerance RST models based on cores of maximal compatible blocks

Abstract

Based on tolerance relation, this paper proposes three knowledge representation systems and then discusses their properties from a new prospective of cores of maximal compatible blocks. It also discusses the relationships of the three knowledge representation systems with the other two proposed by Kryszkiewicz M. and Wanli C. respectively. It considers the measurements such as the accuracy measurements, the rough entropies of knowledge. It also defines and studies rough entropies of set about knowledge in the three systems and obtains several meaningful theorems. © Springer-Verlag Berlin Heidelberg 2006.