A re-examination of IR techniques in QA system

	A re-examination of IR techniques in QA system
	Chang, Y; Xu, HB; Bai, S
	2005
发表期刊	NATURAL LANGUAGE PROCESSING - IJCNLP 2004
ISSN	0302-9743
卷号	3248 页码:71-80
摘要	The performance of Information Retrieval in the Question Answering system is not satisfactory from our experiences in TREC QA Track. In this article, we take a comparative study to re-examine IR techniques on document retrieval and sentence level retrieval respectively. Our study shows: 1) query reformulation should be a necessary step to achieve a better retrieval performance; 2) The techniques for document retrieval are also effective in sentence level retrieval, and single sentence will be the appropriate retrieval granularity.
收录类别	SCI
语种	英语
WOS研究方向	Computer Science
WOS类目	Computer Science, Artificial Intelligence
WOS记录号	WOS:000228359800008
出版者	SPRINGER-VERLAG BERLIN
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/9910
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Chang, Y
作者单位	Chinese Acad Sci, Inst Comp Technol, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Chang, Y,Xu, HB,Bai, S. A re-examination of IR techniques in QA system[J]. NATURAL LANGUAGE PROCESSING - IJCNLP 2004,2005,3248:71-80.
APA	Chang, Y,Xu, HB,&Bai, S.(2005).A re-examination of IR techniques in QA system.NATURAL LANGUAGE PROCESSING - IJCNLP 2004,3248,71-80.
MLA	Chang, Y,et al."A re-examination of IR techniques in QA system".NATURAL LANGUAGE PROCESSING - IJCNLP 2004 3248(2005):71-80.