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Exploiting unlabeled data for improving accuracy of predictive data mining

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5 Author(s)
Kang Peng ; Center for Inf. Sci. & Technol., Temple Univ., Philadelphia, PA, USA ; Vucetic, S. ; Han, B. ; Hongbo Xie
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Predictive data mining typically relies on labeled data without exploiting a much larger amount of available unlabeled data. We show that using unlabeled data can be beneficial in a range of important prediction problems and therefore should be an integral part of the learning process. Given an unlabeled dataset representative of the underlying distribution and a K-class labeled sample that might be biased, our approach is to learn K contrast classifiers each trained to discriminate a certain class of labeled data from the unlabeled population. We illustrate that contrast classifiers can be useful in one-class classification, outlier detection, density estimation, and learning from biased data. The advantages of the proposed approach are demonstrated by an extensive evaluation on synthetic data followed by real-life bioinformatics applications for (1) ranking PubMed articles by their relevance to protein disorder and (2) cost-effective enlargement of a disordered protein database.

Published in:

Data Mining, 2003. ICDM 2003. Third IEEE International Conference on

Date of Conference:

19-22 Nov. 2003

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