Fuzzy covering rough set model on dual-universes

The Model of fuzzy covering rough set on dual-universes is an extension of rough sets in general relation. In this paper, we have first presented several important definitions in which the properties and theorems of fuzzy covering approximation operators are studied. Next, by using the transformation of fuzzy matrix, the threshold value of the parameter is presented to determine whether the fuzzy compatible relation can form a covering or not. Finally, as an application example, we utilize the results to study the model of medical system.