Research Article
Positive Macroscopic Approximation for Fast Attribute Reduction
Inputs: | : the universe | , a condition attribute subset | , a decision attribute set | Output: | : a family of boundary regions | Begin | Sept 1. , // regard the universe as a root IT-block | Step 2. For to do | // generate an element of a positive sequence | // derive IT-blocks with respect to from those with respect to | // obtain the boundary region by means of IT-blocks | // add the boundary region to the sequence | Step 3. Output | End. |
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