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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク SMART Information Retrieval System ： ウィキペディア英語版 SMART Information Retrieval System The SMART (System for the Mechanical Analysis and Retrieval of Text) Information Retrieval System is an information retrieval system developed at Cornell University in the 1960s. Many important concepts in information retrieval were developed as part of research on the (SMART ) system, including the vector space model, relevance feedback, and Rocchio classification. Gerard Salton led the group that developed SMART. Other contributors included Mike Lesk. The SMART system also provides a set of corpora, queries and reference rankings, taken from different subjects, notably * (ADI ): publications from information science reviews * (CACM ): computer science * (Cranfield collection ): publications from aeronautic reviews * (CISI ): library science * (Medlars collection ): publications from medical reviews * (Time magazine collection ): archives of the generalist review ''Time'' in 1963 To the legacy of the SMART system belongs the so-called SMART notation, a mnemonic scheme for denoting tf-idf weighting variants in the vector space model. The mnemonic for representing a combination of weights takes the form ddd.qqq, where the first three letters represents the term weighting of the document vector and the second three letters represents the term weighting for the query vector. The letter representation for a term, $t$, and document, $d$, is as follows: |n (no): 1 |n (none): 1 |- |l (logarithm): 1+log($\backslash text\_$) |t (idf): log$\backslash tfrac\_\})\}$ | p (prob idf): $\backslash textbf\backslash left(\; 0,\backslash text\backslash tfrac\}\; \backslash right)$ |b (byte size): |- |b (boolean): 0, & \text \end |- |L (log average): $\backslash tfrac\_)\}\_(\; \backslash text\_))\}$ |} where tf$\_$ is the term frequency of term $t$ in document $d$. == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SMART Information Retrieval System」の詳細全文を読む 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.