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Laplacian smooth twin support vector machine for semi-supervised classification

  • Wei-Jie ChenEmail author
  • Yuan-Hai Shao
  • Ning Hong
Original Article

Abstract

Laplacian twin support vector machine (Lap-TSVM) is a state-of-the-art nonparallel-planes semi-supervised classifier. It tries to exploit the geometrical information embedded in unlabeled data to boost its generalization ability. However, Lap-TSVM may endure heavy burden in training procedure since it needs to solve two quadratic programming problems (QPPs) with the matrix “inversion” operation. In order to enhance the performance of Lap-TSVM, this paper presents a new formulation of Lap-TSVM, termed as Lap-STSVM. Rather than solving two QPPs in dual space, firstly, we convert the primal constrained QPPs of Lap-TSVM into unconstrained minimization problems (UMPs). Afterwards, a smooth technique is introduced to make these UMPs twice differentiable. At last, a fast Newton–Armijo algorithm is designed to solve the UMPs in Lap-STSVM. Experimental evaluation on both artificial and real-world datasets demonstrate the benefits of the proposed approach.

Keywords

Semi-supervised classification Manifold regularization Twin support vector machine Smooth technique 

Notes

Acknowledgments

The authors would like to thank the editors and the anonymous reviewers, whose invaluable comments helped improve the presentation of this paper substantially. This work is supported by the National Natural Science Foundation of China (11201426, 61203133, 10971223 and 11071252), the Zhejiang Provincial Natural Science Foundation of China (LQ12A01020, LQ13F030010) and the Science and Technology Foundation of Department of Education of Zhejiang Province (Y201225179).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Zhijiang CollegeZhejiang University of TechnologyHangzhouPeople’s Republic of China

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