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dc.titleHyperparameter learning for graph based semi-supervised learning algorithms
dc.contributor.authorZhang, X.
dc.contributor.authorLee, W.S.
dc.identifier.citationZhang, X.,Lee, W.S. (2007). Hyperparameter learning for graph based semi-supervised learning algorithms. Advances in Neural Information Processing Systems : 1585-1592. ScholarBank@NUS Repository.
dc.description.abstractSemi-supervised learning algorithms have been successfully applied in many applications with scarce labeled data, by utilizing the unlabeled data. One important category is graph based semi-supervised learning algorithms, for which the performance depends considerably on the quality of the graph, or its hyperparameters. In this paper, we deal with the less explored problem of learning the graphs. We propose a graph learning method for the harmonic energy minimization method; this is done by minimizing the leave-one-out prediction error on labeled data points. We use a gradient based method and designed an efficient algorithm which significantly accelerates the calculation of the gradient by applying the matrix inversion lemma and using careful pre-computation. Experimental results show that the graph learning method is effective in improving the performance of the classification algorithm.
dc.typeConference Paper
dc.contributor.departmentCOMPUTER SCIENCE
dc.description.sourcetitleAdvances in Neural Information Processing Systems
Appears in Collections:Staff Publications

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