说明：  ID3决策树内容简介： 概述 预备知识 决策树生成(Building Decision Tree) 决策树剪枝(Pruning Decision Tree) 捕捉变化数据的挖掘方法 小结
(ID3 Decision Tree Description: an overview of prior knowledge to generate decision tree (Building Decision Tree) decision tree pruning (Pruning Decision Tree) to capture changes in data mining methods Summary)