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Topical relevance model

Ganguly, Debasis ORCID: 0000-0003-0050-7138, Leveling, Johannes ORCID: 0000-0003-0603-4191 and Jones, Gareth J.F. ORCID: 0000-0003-2923-8365 (2012) Topical relevance model. In: The Eighth Asia Information Retrieval Societies Conference (AIRS 2012), 17-19 Dec 2012, Tianjin, China.

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Abstract

We introduce the topical relevance model (TRLM) as a generalisation of the standard relevance model (RLM). The TRLM alleviates the limitations of the RLM by exploiting the multi-topical structure of pseudo-relevant documents. In TRLM, intra-topical document and query term co-occurrences are favoured, whereas the inter-topical ones are down-weighted. The multi-topical nature of pseudo-relevant documents results from the multi-faceted nature of the information need typically expressed in a query. The TRLM provides a framework to estimate a set of underlying hypothetical relevance models for each such aspect of the information need. Experimental results show that the TRLM significantly outperforms the RLM for ad-hoc and patent prior art search, and additionally that it outperforms recent extensions of the RLM.

Item Type:Conference or Workshop Item (Poster)
Event Type:Conference
Refereed:Yes
Subjects:Computer Science > Information retrieval
DCU Faculties and Centres:Research Initiatives and Centres > Centre for Next Generation Localisation (CNGL)
DCU Faculties and Schools > Faculty of Engineering and Computing > School of Computing
Published in: Proceedings of AIRS 2012. .
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Science Foundation Ireland
ID Code:20364
Deposited On:13 Jan 2015 14:28 by Gareth Jones . Last Modified 25 Oct 2018 09:57

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