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KNN-based maximum margin and minimum volume hyper-sphere machine for imbalanced data classification

  • Yitian XuEmail author
  • Yuqun Zhang
  • Jiang Zhao
  • Zhiji Yang
  • Xianli Pan
Original Article

Abstract

Imbalanced data classification is often met in our real life. In this paper, a novel k-nearest neighbor (KNN)-based maximum margin and minimum volume hyper-sphere machine (KNN-M3VHM) is presented for the imbalanced data classification. The basic idea is to construct two hyper-spheres with different centres and radiuses. The first one contains majority examples and the second one covers minority examples. When constructing the first hyper-sphere, we remove some redundant majority samples using k-nearest neighbor (KNN)-based strategy to balance two classes of samples. Meanwhile, we maximize the margin between two hyper-spheres and minimize their volumes, which can result in two tight boundaries around each class. Similar to the twin hyper-sphere support vector machine (THSVM), KNN-M3VHM solves two related SVM-type problems and avoids the matrix inverse operation when solving the convex optimization problems. KNN-M3VHM considers not only the within-class information but also the between-class margin, then it achieves better performance in comparison with other state-of-the-art algorithms. Experimental results on twenty-five datasets validate the significant advantages of our proposed algorithm.

Keywords

Maximum margin Minimum volume K-nearest neighbor Hyper-sphere KNN-M3VHM 

Notes

Acknowledgements

The authors gratefully acknowledge the helpful comments and suggestions of the reviewers, which have improved the presentation. This work was supported in part by the Beijing Natural Science Foundation (No. 4172035) and National Natural Science Foundation of China (No. 11671010).

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Yitian Xu
    • 1
    Email author
  • Yuqun Zhang
    • 1
  • Jiang Zhao
    • 1
  • Zhiji Yang
    • 1
  • Xianli Pan
    • 1
  1. 1.College of ScienceChina Agricultural UniversityBeijingChina

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