KEYWORD EXPANSION METHOD AND SYSTEM, AND CLASSIFIED CORPUS ANNOTATION METHOD AND SYSTEM
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United States of America Patent
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Aug 11, 2016
app pub date -
Dec 5, 2013
filing date -
Sep 29, 2013
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Abstract
A keyword expansion method and system are provided. The method comprises searching with a predetermined initial keyword to obtain current keywords used as a basis of a next search, performing loop search through keyword iteration. If a keyword error between keywords obtained in the current search and those keywords obtained in a previous search is less than a predetermined threshold, using the keywords obtained in the current search as expanded keywords of the initial keyword. With this method, the problem of manually establishing a thesaurus in the prior art may be solved. A method and system of automatically annotating a classified corpus is also provided. The method comprises: determining one or more initial core keywords for each class; obtaining expanded keywords for each class through expanding the initial core keywords; searching with the expanded keywords corresponding to a class to select a classified corpus and annotating the classified corpus.
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