IDF:反文档频率

“逆文档频率(Inverse Document Frequency,简称IDF)”是信息检索与自然语言处理中的一个核心统计指标,主要用于衡量词语在语料库中的重要性。其基本思想是,一个词出现的文档越少,其IDF值越高,对文档的区分能力就越强。该术语在搜索引擎、文本挖掘等软件技术领域被广泛使用,常与词频(TF)结合构成TF-IDF算法,用于文本特征提取与内容权重计算。

Inverse Document Frequency具体释义

  • 英文缩写:IDF
  • 英语全称:Inverse Document Frequency
  • 中文意思:反文档频率
  • 中文拼音:fǎn wén dàng pín lǜ
  • 相关领域idf 软件

Inverse Document Frequency的英文发音

例句

  1. In this paper, a Chinese news topic detection system is designed and tested by using the improved time window strategy and adopting the self-adaptive inverse document frequency.
  2. 文中通过改进加窗策略,采用自适应倒排文档频率,设计了一个中文新闻主题检测系统并进行了实验。
  3. This paper compares several feature selection methods in text categorization, proposes a new feature selection method based on term frequency and inverse document frequency.
  4. 本文在分析比较几种用于文本分类的特征选择方法的基础上,提出了一种基于术语频率和逆文档频率的特征选择方法TDF。
  5. This paper gives a term weighting method based on inverse document frequency, HTML tags and length of Chinese phrase, presents the method to select Web text feature based on the messy genetic algorithm.
  6. 该文设计了一个综合考虑位置、频率和词长3个因素的中文Web文本词权重的计算公式,提出了一种用变长度染色体遗传算法提取Web文本特征的方法。
  7. Comparison of Out Document Frequency Weight Method with Inverse Document Frequency(IDF) Weight Method for Chinese Documents
  8. 汉语文献文外频率加权与逆文献频率加权方法的比较
  9. Traditional algorithms only consider about TF ( Term Frequency ), IDF ( Inverse Document Frequency(IDF) ) and so on, and do not consider DI ( Distribution Information ) among and inside classes and LFHW ( Low Frequency but High Weight ) terms.
  10. 传统的特征权重算法着重于考虑频率和反文档频率(IDF)等因素,而未考虑特征的类间、类内分布与低频高权信息。