2 , to be an improvement of discretization method based on rough set theory and boolean reasoning , algorithms for discretization in mixed real and discrete attributes system are proposed , functions based on information entropy are presented to analysis the results of discretization quantitatively , and the effects of discretization for knowledge acquisition are discussed 基于布爾邏輯與粗糙集相結合的離散化方法,提出了連續離散屬性混合系統離散化的策略和啟發式算法,在信息熵的基礎上,提出了一種對離散化結果進行評判的標準,并對布爾邏輯離散化方法和混合離散化算法進行了評價。