Combining rough sets with decision tree, a spam filtering solution based on rough sets and decision tree (RS-DT) was proposed.

将粗糙集与决策树结合，提出一个基于RS - DT的邮件分类方案与模型，并进行了实验及结果分析。

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Then, Rough sets (RS) theory is applied to reduce the unimportant and unnecessary reliability information which influenced the overall system dynamic reliability assessment.

然后根据粗糙集理论判断各个构件对机械臂总体可靠性的影响，对概率信息进行约简；

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