Answer Extracting Based on Passage Retrieval in Chinese Question Answering System

Authors:
Zhengtao Yu;Lu Han;Cunli Mao;Yunwei Li;Yanxia Qiu;Xiangyan Meng
Affiliations:
The School of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, 650051, P.R. China and The Institute of Intelligent Information Processing, Computer Te ...;The School of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, 650051, P.R. China;The School of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, 650051, P.R. China;The School of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, 650051, P.R. China;The School of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, 650051, P.R. China;The School of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, 650051, P.R. China
Venue:
ICCS '07 Proceedings of the 7th international conference on Computational Science, Part IV: ICCS 2007
Year:
2007

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Abstract

Passage retrieval is a base of answer extracting in Chinese question answering system.In order to improve the precision of the passage retrieval which includes answers, this paper analyze first existing passage retrieval methods,and point to their shortcomings, then put forward a new method of passage retrieval, in which factors are considered ,such as frequency of query words and query expansion words in passage, the length of passage, the distribution density and minimum match span of query words and query expansion words in passage ,when calculating passage weight.The new method can realize passage retrieval on the basis of the weight calculation, and obtain optimization answers passage. Final, experiment result of answer extracting based on passage retrieval have shown that the method given has better effect.