| |
| Rough set theory is a tool handling with fuzzy and uncertain knowledge, it mainly deals with rough set model of unary relation. This paper puts forward unordered-pair product of binary relation based on rough set model of binary relation in the sense of Cartesian product, and improve it, defines some basic concepts, such as lower approximation, upper approximation, and so on, and has designed an algorithm. It shows that the improved method is effective through example. |
|
| Keywords:ordered-pair-upper/ordered-pair-lower approximation;unordered-pair-upper/unordered-pair-lower approximation;granular space;rough sets |
|
