翻訳と辞書 Words near each other ・ website ・ webster ・ webster's dictionary ・ wedged ・ wedgie ・ wedgitude ・ weeble ・ weeds ・ weenie ・ weenix ・ weighted search ・ well-behaved ・ well-connected ・ well-known port ・ well-ordered set ・ wesley clark ・ western digital corporation ・ westmount ・ wetware ・ wf Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク weighted search ： FOLDOC weighted search A search based on frequencies of the search terms in the documents being searched. Weighted search is often used by search engines. It produces a numerical score for each possible document. A document's score depends on the frequency of each search term in that document compared with the overall frequency of that term in the entire corpus of documents. A common approach is called tf.idf which stands for term frequency * inverse document frequency. Term frequency means "the more often a term occurs in a document, the more important it is in describing that document." {http://ciir.cs.umass.edu/cmpsci646/ir4/tsld034.htm} Inverse document frequency means the more documents a term appears in, the less important the term is. A simple weighted search is just a list of search terms, for example: car automobile Weighted search is often contrasted with boolean search. It is possible to have a search that syntactically is a boolean search but which als スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.