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IJCNLP
2004
Springer

A Re-examination of IR Techniques in QA System

9 years 5 months ago
A Re-examination of IR Techniques in QA System
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.
Yi Chang, Hongbo Xu, Shuo Bai
Added 02 Jul 2010
Updated 02 Jul 2010
Type Conference
Year 2004
Where IJCNLP
Authors Yi Chang, Hongbo Xu, Shuo Bai
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