关键词: 权重, 粗糙集, 属性重要度, 决策表

Abstract: This paper deeply studies the attribute importance represented by rough set. Considering the drawbacks of the existing methods of attribute weight assignment based on rough set and both individual significance degree and the number of values of each attribute in the conditional attributes, it proposes an improved method of attribute weight assignment based on rough set, and it’s rationality is proved. A case is used to prove that improved weighting method can solve the existing problem.

Key words: weight, rough sets, attribute significance degree, decision table