网络释义专业释义
它计算一个词在当前文章中出现的次数(term frequency)，除以这个词在其余海量文章中出现的平均次数的log。 在一篇文章中，TFIDF值比较高的那些词，就代表了该文章的关键词。
基于16个网页-相关网页
short-term frequency stability 短期频率稳定度 ; 频率短期稳定度
long-term frequency drift 长期频率漂移
Term Frequency data 词频数据
term frequency stability 短期频率稳定度
Normalized Term Frequency 正规化词频率
long-term frequency stability 长期频率稳定度
term frequency drift 长期频率漂移
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词频 - 引用次数：28
It is shown by the experiment that considering the term with high term frequency during feature selection can improve the classification performance of the traditional DF method.
实验结果表明,在进行特征选择时,考虑高词频特征词对类别的贡献,可提高传统DF方法的分类性能。
参考来源 - 基于文档频率的特征选择方法词条频率 - 引用次数：4 参考来源 - 高性能特征选择及文本分类算法研究术语频率 -
词频 - 引用次数：4 参考来源 - 金庸小说语言研究
·2,447,543篇论文数据，部分数据来源于NoteExpress
双语例句原声例句权威例句
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This article puts forward the concept of Chinese and English dictionary with reverse term frequency.
提出了带反向词频的中英文词典这一概念。
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Due to its very good short-term frequency stability, hydrogen maser has been given more and more attention in time service.
氢原子钟由于其优良的短期稳定性能和较长的工作寿命因而在时间社会得到了越来越多的重视。
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Especially, the use of SC cut quartz crystal further improves the short-term frequency stability and acceleration sensitivity.
尤其是石英晶体谐振片采用了SC切型进一步提高了短期频率稳定度和加速度灵敏度。
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We tend to use the term to refer to information we have about categories and intuitions we have about the typicality, our frequency of certain features of categories.
我们会用这个词来代表,我们对某些类别掌握的信息,用它来指代我们掌握典型性的直觉，指代某个类别反复出现的特性。
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