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1. (WO2015043066) KEYWORD EXPANSION METHOD AND SYSTEM, AND CLASSIFIED CORPUS ANNOTATION METHOD AND SYSTEM

Pub. No.:    WO/2015/043066    International Application No.:    PCT/CN2013/088586
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Fri Dec 06 00:59:59 CET 2013
IPC: G06F 17/30
Applicants: PEKING UNIVERSITY FOUNDER GROUP CO., LTD.
北大方正集团有限公司
FOUNDER APABI TECHNOLOGY LIMITED
北京方正阿帕比技术有限公司
PEKING UNIVERSITY
北京大学
Inventors: YE, Mao
叶茂
TANG, Zhi
汤帜
XU, Jianbo
徐剑波
LEI, Chao
雷超
JIN, Lifeng
金立峰
Title: KEYWORD EXPANSION METHOD AND SYSTEM, AND CLASSIFIED CORPUS ANNOTATION METHOD AND SYSTEM
Abstract:
Provided are a method and system for keyword expansion; the method performs a search by means of an initial keyword, the searched and obtained keyword serving as the basis for the next search, and the searches being performed by means of keyword iteration; when the error of two consecutively searched keywords is within a certain range, the searched keyword serves as an expansion keyword of the initial keyword; in this way, various expressions of the initial keyword and multi-faceted implied meanings of the word are obtained, and the initial keyword is effectively and reasonably expanded, solving the problem in the prior art requiring that a corpus be manually established; the method is a convenient and highly accurate method for keyword expansion. Also provided is a method and system for classifying corpora and automatic annotation; the method determines for each class one or more initial core keywords; expanded keywords of each class are obtained by means of initial core keyword expansion; a search is performed using the expanded keywords corresponding to the classes, and a class corpus is selected therefrom and annotated.