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Learning to rank academic experts in the DBLP dataset

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journal contribution
posted on 15.10.2019, 10:35 by Catarina Moreira, Pável Calado, Bruno Martins
Expert finding is an information retrieval task that is concerned with the search for the most knowledgeable people with respect to a specific topic, and the search is based on documents that describe people's activities. The task involves taking a user query as input and returning a list of people who are sorted by their level of expertise with respect to the user query. Despite recent interest in the area, the current state‐of‐the‐art techniques lack in principled approaches for optimally combining different sources of evidence. This article proposes two frameworks for combining multiple estimators of expertise. These estimators are derived from textual contents, from graph‐structure of the citation patterns for the community of experts and from profile information about the experts. More specifically, this article explores the use of supervised learning to rank methods, as well as rank aggregation approaches, for combining all of the estimators of expertise. Several supervised learning algorithms, which are representative of the pointwise, pairwise and listwise approaches, were tested, and various state‐of‐the‐art data fusion techniques were also explored for the rank aggregation framework. Experiments that were performed on a dataset of academic publications from the Computer Science domain attest the adequacy of the proposed approaches.

Funding

This work was supported by Fundação para a Ciência e Tecnologia (FCT) through INESC‐ID multi annual funding under project PEst‐OE/EEI/LA0021/2013 and through FCT Project SMARTIS (ref. PTDC/EIA‐EIA/115346/2009).

History

Citation

Expert Systems, 2015, 32 (4), pp. 477-493

Author affiliation

/Organisation/COLLEGE OF SOCIAL SCIENCES, ARTS AND HUMANITIES/School of Management

Version

AM (Accepted Manuscript)

Published in

Expert Systems

Publisher

Wiley

issn

0266-4720

Copyright date

2013

Available date

15/10/2019

Publisher version

https://onlinelibrary.wiley.com/doi/full/10.1111/exsy.12062

Language

en