Extended Tolerance Relation to Define a New Rough Set Model in Incomplete Information Systems

الملخص EN

This paper discusses and proposes a rough set model for an incomplete information system, which defines an extended tolerance relation using frequency of attribute values in such a system.

It first discusses some rough set extensions in incomplete information systems.

Next, “probability of matching” is defined from data in information systems and then measures the degree of tolerance.

Consequently, a rough set model is developed using a tolerance relation defined with a threshold.

The paper discusses the mathematical properties of the newly developed rough set model and also introduces a method to derive reducts and the core.