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Semi-Supervised Multitask Learning
Qiuhua Liu · Xuejun Liao · Lawrence Carin

Tue Dec 04 09:50 AM -- 10:00 AM (PST) @ None

A semi-supervised multitask learning (MTL) framework is presented, in which M parameterized semi-supervised classifiers, each associated with one of M partially labeled data manifolds, are learned jointly under the constraint of a soft-sharing prior imposed over the parameters of the classifiers. The unlabeled data are utilized by basing classifier learning on neighborhoods, induced by a Markov random walk over a graph representation of each manifold. Experimental results on real data sets demonstrate that semi-supervised MTL yields significant improvements in generalization performance over either semi-supervised single-task learning (STL) or supervised MTL.

Author Information

Qiuhua Liu (Duke University)
Xuejun Liao (Duke University)
Lawrence Carin (Duke University)

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