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Author:

Qu, Y. (Qu, Y..) | Ji, J. (Ji, J..) | Liang, P. (Liang, P..) | Gao, M. (Gao, M..)

Indexed by:

Scopus PKU CSCD

Abstract:

To solve the classification model overfitting problem caused by the high dimension and small sample properties of functional magnetic resonance imaging (fMRI) data, a feature selection framework of whole-brain fMRI data combining L1-norm regularization and L2-norm regularization in softmax regression is proposed. Firstly, the whole brain is divided into the region of interest (ROI) and the region of non-interest (RONI) in terms of the characteristics of brain cognition. Then, L2-norm regularization shrinking the weighting coefficients is used to model all voxels in ROI while L1-norm regularization with a sparse effect is employed for modeling the activated voxels in RONI. Finally, the regularized softmax regression model of whole-brain fMRI data is constructed by integrating all voxels in ROI and the activated voxels in RONI. The experimental results on Haxby datasets show that the regularization strategies of L2-norm and L1-norm effectively improve the whole-brain classification performance compared to some other methods. © 2016, Science Press. All right reserved.

Keyword:

Functional magnetic resonance imaging (fMRI); Overfitting; Regularization; Softmax regression

Author Community:

  • [ 1 ] [Qu, Y.]Beijing Municipal Key Laboratory of Multimedia and Intelligent Software Technology, College of Computer Science, Beijing University of Technology, Beijing, 100124, China
  • [ 2 ] [Ji, J.]Beijing Municipal Key Laboratory of Multimedia and Intelligent Software Technology, College of Computer Science, Beijing University of Technology, Beijing, 100124, China
  • [ 3 ] [Liang, P.]Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
  • [ 4 ] [Gao, M.]Beijing Municipal Key Laboratory of Multimedia and Intelligent Software Technology, College of Computer Science, Beijing University of Technology, Beijing, 100124, China

Reprint Author's Address:

  • [Ji, J.]Beijing Municipal Key Laboratory of Multimedia and Intelligent Software Technology, College of Computer Science, Beijing University of TechnologyChina

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Source :

Pattern Recognition and Artificial Intelligence

ISSN: 1003-6059

Year: 2016

Issue: 7

Volume: 29

Page: 641-649

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 2

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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