For the given unclassified model, feature selection requires us to select the most excellentfeature subset and it can represent the model which is classified.
对于一个给定的待分类模式，特征选择要求人们从大量的特征中选取一个最优特征子集，以代表被分类的模式。
2
It's an excellentfeature that's only available in DB2 9.7 and is one that should be activated if parameterized queries are not available for a given development framework.
It's a little pricey for home users, but it's an excellentfeature for people who want to run a lot of services without worrying about security or other interactions between them.