Interpreting TF-IDF term weights as making relevance decisions

  title={Interpreting TF-IDF term weights as making relevance decisions},
  author={H. C. Wu and R. Luk and K. Wong and K. Kwok},
  journal={ACM Trans. Inf. Syst.},
  • H. C. Wu, R. Luk, +1 author K. Kwok
  • Published 2008
  • Computer Science
  • ACM Trans. Inf. Syst.
  • A novel probabilistic retrieval model is presented. [...] Key Method Our novel retrieval model is simplified to a basic ranking formula that directly corresponds to the TF-IDF term weights. In general, we show that the term-frequency factor of the ranking formula can be rendered into different term-frequency factors of existing retrieval systems. In the basic ranking formula, the remaining quantity - log p(&rmacr;|t ∈ d) is interpreted as the probability of randomly picking a nonrelevant usage (denoted by…Expand Abstract
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