在分类任务中，特征选择是一种提高分类效果的重要方法。现实生活中的数据都是存储在多关系数据库中的。多关系数据库的数据中有许多......

At present, there are some resistible illegal operations aiming at creating false public opinions in internet public opi......

The majority of academic researchers present the results of their scientific activity on the Web. This trace can be used......