Active Learning for Duplicate Record Identification in Deep Web

Active learning is important for duplicate record identification since manually identifying a suitable set of labeled examples is difficult. The imbalance data problem for duplicate record identification, wherein the number of non-matches samples far exceeds the number of matches samples, causes poor prediction performance for matches class. In this paper, we present a new active learning approach by taking the certainty, uncertainty and representativeness into account. Our method first trains two feature subspace classifiers and uses certainty classifier to generate a matches pool from which informative matches samples were selected for manual annotation by leveraging an uncertainty and density measurement, and meanwhile, non-matches samples are automatically labeled to reduce human annotation efforts. We include a detailed experimental evaluation on real-world data demonstrating the effectiveness of our algorithms.