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Semi-supervised learning with nuclear norm regularization
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DOI：10.1016/j.patcog.2013.01.009.png)
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摘要
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Integrating new knowledge sources into various learning tasks to improve their performance has recently become an interesting topic. In this paper we propose a novel semi-supervised learning (SSL) approach, called semi-supervised learning with nuclear norm regularization (SSL-NNR), which can simultaneously handle both sparse labeled data and additional pairwise constraints together with unlabeled data. Specifically, we first construct a unified SSL framework to combine the manifold assumption and the pairwise constraints assumption for classification tasks. Then we provide a modified fixed point continuous algorithm to learn a low-rank kernel matrix that takes advantage of Laplacian spectral regularization. Finally, we develop a two-stage optimization strategy, and present a semi-supervised classification algorithm with enhanced spectral kernel (ESK). Moreover, we also present a theoretical analysis of the proposed ESK algorithm, and derive an easy approach to extend it to out-of-sample data. Experimental results on a variety of synthetic and real-world data sets demonstrate the effectiveness of the proposed ESK algorithm. (C) 2013 Elsevier Ltd. All rights reserved.
Keyword:
Semi-supervised learning (SSL)
Low-rank kernel learning
Graph Laplacian
Nuclear norm regularization
Pairwise constraints
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IF:
7.6
论文数:
1.3W
被引数:
4.5W
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