TF-IDF（term frequency–inverse document frequency）词频--反转文件频率，是一种用于情报检索与文本挖掘的常用加权技术，用以评估一个词对于一个文件或者一个语料库中的一个领域文件集的重复程度。词频统计为学术研究提供了新的方法和视野。
...章详细信息 关键词： 特征选择;;词频;;文档频;;粗糙集;;信息量;;属性约简 [gap=935]Keywords: feature selection;word frequency;document frequency;rough set;information quantity;attribute reduction ..
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关键词频率 Keyword Frequency
关键词频次 Keyword Frequency
词频效应 word frequency efect ; effect of word frequency ; frequency effect
词频分布 word frequency distribution
词频统计 Word Frequency Statistics ; word frequency count ; word occurrence frequency statistics
词频计算 word count ; Word frequency count
词频表 frequency list ; word list
邻近词频率效果 neighborhood frequency effect
零次词频 Unit Six
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Lexical variation is indicated by the family/token ratio, while lexical frequency profile is shown by percentage of high frequency words and low frequency words in a composition.
词汇变化以一篇作文中所使用的原型词数量占总词数的比例表示,词频概貌以作文中所使用的高频词汇和低频词汇占总词数的比例表示。
参考来源 - 英语专业大学生写作中的词汇产出变化研究The study examines the effects of topic familiarity (more familiar, less familiar) and exposure frequency ( 1 exposure, 3 exposure, 6 exposure ) on intermediate Korean learner’s incidental vocabulary acquisition by reading Chinese. A with-in subject design was used here.
本文研究了在汉语作为第二语言的阅读过程中,话题熟悉度(话题熟悉,话题不熟悉)和词频(词语在文章中出现1次,3次,6次)对中级韩国学习者的伴随性词汇习得的影响。
参考来源 - 话题熟悉度和词频对中级韩国学习者伴随性词汇习得的影响·2,447,543篇论文数据，部分数据来源于NoteExpress
heavy 和 rain 两词频繁同现。
一张谷歌词频统计图显示，到1993年时，在各类书中，气候变化这一词的使用频率就已经超过全球变暖。
A Google Ngram Viewer chart shows that by 1993 climate change was already more commonly used in books than global warming.
未发现命名的词频效应和特殊范畴的命名障碍。
This article didn’t find the effect of word frequency on naming and category-specific anomia.
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