Multi-domain feature analysis method of MI-EEG signal based on Sparse Regularity Tensor-Train decomposition

Yunyuan Gao, Congrui Zhang, Feng Fang, Jared Cammon, Yingchun Zhang

Research output: Contribution to journalArticlepeer-review


Tensor analysis can comprehensively retain multidomain characteristics, which has been employed in EEG studies. However, existing EEG tensor has large dimension, making it difficult to extract features. Traditional Tucker decomposition and Canonical Polyadic decomposition(CP) decomposition algorithms have problems of low computational efficiency and weak capability to extract features. To solve the above problems, Tensor-Train(TT) decomposition is adopted to analyze the EEG tensor. Meanwhile, sparse regularization term can then be added to TT decomposition, resulting in a sparse regular TT decomposition (SR-TT). The SR-TT algorithm is proposed in this paper, which has higher accuracy and stronger generalization ability than state-of-the-art decomposition methods. The SR-TT algorithm was verified with BCI competition III and BCI competition IV dataset and achieved 86.38% and 85.36% classification accuracies, respectively. Meanwhile, compared with traditional tensor decomposition (Tucker and CP) method, the computational efficiency of the proposed algorithm was improved by 16.49 and 31.08 times in BCI competition III and 20.72 and 29.45 times more efficient in BCI competition IV. Besides, the method can leverage tensor decomposition to extract spatial features, and the analysis is performed by pairs of brain topography visualizations to show the changes of active brain regions under the task condition. In conclusion, the proposed SR-TT algorithm in the paper provides a novel insight for tensor EEG analysis.

Original languageEnglish (US)
Article number106887
JournalComputers in Biology and Medicine
StatePublished - May 2023


  • MI-EEG
  • Sparse regularity
  • Tensor decomposition
  • Tensor-Train
  • Brain-Computer Interfaces
  • Brain/diagnostic imaging
  • Algorithms
  • Electroencephalography/methods
  • Imagination
  • Signal Processing, Computer-Assisted

ASJC Scopus subject areas

  • Health Informatics
  • Computer Science Applications


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