feature selection

• 特征选择

feature selection的用法和样例：

例句

1. The chief obstacles to feature selection are noise and sparseness.
   本文介绍了一种基于类别特征域的特征选择方法。
2. The result of the feature selection in unsupervised learning is not as satisfactory as that in supervised learning.
   无监督学习环境下的特征选择往往无法取得像有监督学习环境下那样令人满意的效果。