After analyzing some normal evaluation functions for feature selection, a new evaluation function named the ratio of mutual information in feature selection was presented.
在分析了常用的一些特征选择的评价函数的基础上，提出了一个新的评价函数，即互信息比值。
The thesis first analyses the concept, feature, function and theoretical basis of the developmental evaluation system.
本文首先对发展性教师教学评价的概念、产生、特征、功能、理论依据等进行了解析。
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