APPLYING COMPLETELY-ARBITRARY PASSAGE FOR PSEUDO-RELEVANCE FEEDBACK IN LANGUAGE MODELING APPROACH
SCIE
SCOPUS
- Title
- APPLYING COMPLETELY-ARBITRARY PASSAGE FOR PSEUDO-RELEVANCE FEEDBACK IN LANGUAGE MODELING APPROACH
- Authors
- Na, S.-H; Kang, I.-S; Lee, Y.-H; Lee, J.-H.
- Date Issued
- 2008-01
- Publisher
- SPRINGER
- Abstract
- Different from the traditional document-level feedback, passage-level feedback restricts the context of selecting relevant terms to a passage in a document, rather than to the entire document. It can thus avoid the selection of non-relevant terms from non-relevant parts in a document. The most recent work of passage-level feedback has been investigated from the viewpoint of the fixed-window type of passage. However, the fixed-window type of passage has limitation in optimizing the passage-level feedback, since it includes a query-independent portion. To minimize the query-independence of the passage, this paper proposes a new type of passage, called completely-arbitraty passage. Based on this, we devise a novel two-stage passage feedback - which consists of passage-retrieval and passage-extension as sub-steps, unlike previous single-stage passage feedback relying only on passage retrieval. Experimental results show that the proposed two-stage passage-level feedback much significantly improves the document-level feedback than the single-stage passage feedback that uses the fixed-window type of passage.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/35954
- DOI
- 10.1007/978-3-540-68636-1_74
- ISSN
- 0302-9743
- Article Type
- Article
- Citation
- LECTURE NOTES IN COMPUTER SCIENCE, vol. 4993, page. 626 - 631, 2008-01
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