Heuristic Attribute Reduction Based on Discernibility Matrix and Its Application

For the purpose of making up the faultiness of attribute reduction algorithm based on discernibility matrix, the method of attribute importance based on discernibility matrix is put forward in this paper and is used as heuristic knowledge in deciding the sequence of attribute reduction. Compared with general methods, the result attained by this method rooted in evaluation data directly, so it has more reliability and strong persuasion.