The Journal of China Universities of Posts and Telecommunications ›› 2020, Vol. 27 ›› Issue (3): 31-41.doi: 10.19682/j.cnki.1005-8885.2020.0014

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Application of smoothing technique on twin support vector hypersphere


  • Received:2019-11-08 Revised:2020-04-12 Online:2020-06-24 Published:2020-08-30
  • Contact: Qing Wu
  • Supported by:
    National Natural Science Foundation of China;the Key Research Project of Shanxi Province;the International S&T Cooperation Program of Shanxi Province;the Foundation of Education Department of Shanxi Province

Abstract: In order to improve the learning speed and reduce computational complexity of twin support vector hypersphere (TSVH), this paper presents a smoothed twin support vector hypersphere (STSVH) based on the smoothing technique. STSVH can generate two hyperspheres with each one covering as many samples as possible from the same class respectively. Additionally, STSVH only solves a pair of unconstraint differentiable quadratic programming problems (QPPs) rather than a pair of constraint dual QPPs which makes STSVH faster than the TSVH. By considering the differentiable characteristics of STSVH, a fast Newton-Armijo algorithm is used for solving STSVH. Numerical experiment results on normally distributed clustered datasets ( NDC) as well as University of California Irvine (UCI) data sets indicate that the significant advantages of the proposed STSVH in terms of efficiency and generalization performance.

Key words: twin support vector hypersphere, Newton-Armijo algorithm, smoothing approximation function, unconstraint differentiable optimization