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Risk-aware Information Retrieval Models
Most retrieval models estimate the relevance of each document to a query and rank the documents accordingly. However, such an approach ignores the uncertainty associated with the estimates of...
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Best Paper Prize in ECIR2009
The Efficient Frontier in document ranking Jun Wang, Mean-Variance Analysis: A New Document Ranking Theory in Information Retrieval, ECIR2009 This paper concerns document ranking in information...
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Portfolio Theory of Information Retrieval
[bibtex file=mypublications.bib key=Wang:sigir2009:1] Presentation slides Portfolio effect of Document Ranking As a general rule of thumb, when we present search results for a query, documents should...
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Directional Error Based Collaborative Filtering
Goal-driven Collaborative Filtering – A Directional Error Based Approach, ECIR10 Tamas Jambor and Jun Wang [bibtex file=mypublications.bib key=Wang:ecir2010] Directional Risk Preference of...
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On Statistical Analysis and Optimization of IR Effectiveness Metrics
The two distinct stages in the statistical document ranking process. By adjusting the correlation between documents from -0.2 to 1.0, the gain on performance for Average Precision, DCG (Discounted...
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ACM SIGIR2010 Optimal Ranker
Optimal Ranker The slides of the SIGIR talk will be put online.
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