NDLI: Tie Breaker: A Novel Way of Combining Retrieval Signals

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Tie Breaker: A Novel Way of Combining Retrieval Signals

Content Provider	ACM Digital Library
Author	Fang, Hui Wu, Hao
Abstract	Empirical studies of information retrieval suggest that the effectiveness of a retrieval function is closely related to how it combines multiple retrieval signals including term frequency, inverse document frequency and document length. Although it is relatively easy to capture how each signal contributes to the relevance scores, it is more challenging to find the best way of combining these signals since they often interact with each other in a complicated way. As a result, when deriving a retrieval function from traditional retrieval models, the choice of one implementation over the others was often made based on empirical observations rather than sound theoretical derivations. In this paper, we propose a novel way of combining retrieval signals to derive robust retrieval functions. Instead of seeking an integrated way of combining these signals into a complex mathematical retrieval function, our main idea is to prioritize the retrieval signals, apply the strongest signal first to rank documents, and then iteratively use the weaker signals to break the ties of the documents with the same scores. One unique advantage of our method is that it eliminates the need of having complicated implementation of the signals and enables a simple yet elegant way of combining the multiple signals for document ranking. Empirical results show that the proposed method can achieve comparable performance as the state of art retrieval functions over traditional TREC ad hoc retrieval collections, and can outperform them over TREC microblog retrieval collections.
Starting Page	72
Ending Page	75
Page Count	4
File Format	PDF
ISBN	9781450321075
DOI	10.1145/2499178.2499192
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2013-09-29
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Tie-breaking Prediction
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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