Affiliation:
1. Southwest University, China
Abstract
This chapter establishes belief and plausibility functions within the context of multigranulation, delving into the structures of belief and plausibility. The focus extends to the examination of multigranulation rough sets within multi-scale information systems. Subsequently, to determine the optimal level within the multigranulation rough set, a method for optimal scale selection is introduced. This method caters to diverse requirements in optimistic and pessimistic multigranulation within the multi-scale information system. In-depth analyses of the characteristics of optimistic and pessimistic multigranulation optimal scale selection for multi-scale information systems are conducted separately, revealing intrinsic connections between distinct optimal scale selection methodologies.