Query expansion (QE) is the process of reformulating a seed query to improve retrieval performance in information retrieval operations. In the context of web search engines, query expansion involves evaluating a user's input (what words were typed into the search query area, and sometimes other types of data) and expanding the search query to match additional documents.

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  • Query expansion (QE) is the process of reformulating a seed query to improve retrieval performance in information retrieval operations. In the context of web search engines, query expansion involves evaluating a user's input (what words were typed into the search query area, and sometimes other types of data) and expanding the search query to match additional documents. Query expansion involves techniques such as: Finding synonyms of words, and searching for the synonyms as well Finding all the various morphological forms of words by stemming each word in the search query Fixing spelling errors and automatically searching for the corrected form or suggesting it in the results Re-weighting the terms in the original query Query expansion is a technology studied in the field of computer science, particularly within the realm of natural language processing and information retrieval.
  • 擴展查詢(Query expansion)，也有人從英文翻譯為查詢擴展、查詢擴張、查詢問句擴展、字詞擴張、查詢延伸、查詢字詞擴展、自動查詢擴展、查詢語擴充……等。為了改善資訊檢索召回率(Recall)，而將原來查詢句增加新的關鍵字來重新查詢，此一技術稱為擴展查詢。搜索引擎會將使用者輸入的查詢句先做一次檢索，根據檢索出來的文件，選取出適合的關鍵字，加到查詢句重新檢索，藉此來找出更多的相關文件。 擴展查詢使用在以下技術中： 找出同義字，根據同義字找出其它文件 在英文檢索中，找出原來的關鍵字其它形態的字詞來擴展查詢 修改錯誤的拼字，自動更正成正確的拼字或提供正確的拼字給使用者 重新改寫原始的查詢句 擴展查詢是電腦科學的技術，尤其使用在資訊檢索和自然語言處理領域中
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  • December 2007
  • March 2009
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  • Query expansion (QE) is the process of reformulating a seed query to improve retrieval performance in information retrieval operations. In the context of web search engines, query expansion involves evaluating a user's input (what words were typed into the search query area, and sometimes other types of data) and expanding the search query to match additional documents.
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  • Query expansion
  • 擴展查詢
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