Weight-based boosting model for cross-domain relevance ranking adaptation

  • Authors:
  • Peng Cai;Wei Gao;Kam-Fai Wong;Aoying Zhou

  • Affiliations:
  • East China Normal University, Shanghai, China;The Chinese University of Hong Kong, Shatin, N.T., Hong Kong;The Chinese University of Hong Kong, Shatin, N.T., Hong Kong and Key Laboratory of High Confidence Software Technologies, Ministry of Education, Beijing, China;East China Normal University, Shanghai, China

  • Venue:
  • ECIR'11 Proceedings of the 33rd European conference on Advances in information retrieval
  • Year:
  • 2011

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Abstract

Adaptation techniques based on importance weighting were shown effective for RankSVM and RankNet, viz., each training instance is assigned a target weight denoting its importance to the target domain and incorporated into loss functions. In this work, we extend RankBoost using importance weighting framework for ranking adaptation. We find it non-trivial to incorporate the target weight into the boosting-based ranking algorithms because it plays a contradictory role against the innate weight of boosting, namely source weight that focuses on adjusting source-domain ranking accuracy. Our experiments show that among three variants, the additive weight-based RankBoost, which dynamically balances the two types of weights, significantly and consistently outperforms the baseline trained directly on the source domain.