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Wenpeng ZHAI, Xiaonei ZHANG, Huirang HOU, Qinghao MENG. Olfactory electroencephalogram signal recognition based on wavelet energy moment[J]. JOURNAL OF MECHANICAL ENGINEERING, 2020, 37(3): 399-404. doi: 10.7507/1001-5515.201910036
Citation: Wenpeng ZHAI, Xiaonei ZHANG, Huirang HOU, Qinghao MENG. Olfactory electroencephalogram signal recognition based on wavelet energy moment[J]. JOURNAL OF MECHANICAL ENGINEERING, 2020, 37(3): 399-404. doi: 10.7507/1001-5515.201910036

Olfactory electroencephalogram signal recognition based on wavelet energy moment

doi: 10.7507/1001-5515.201910036
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  • Corresponding author: MENG Qinghao, Email: qh_meng@tju.edu.cn
  • Received Date: 18 Oct 2019
  • Rev Recd Date: 27 Apr 2020
  • Publish Date: 17 Mar 2020
  • Studying the ability of the brain to recognize different odors is of great significance in the assessment and diagnosis of olfactory dysfunction. The wavelet energy moment (WEM) was proposed as a feature of olfactory electroencephalogram (EEG) signal and used for odor classification. Firstly, the olfactory evoked EEG data of 13 odors were collected by an experiment. Secondly, the WEM was extracted from olfactory evoked EEG data as the signal feature, and the power spectrum density (PSD), approximate entropy, sample entropy and wavelet entropy were used as the contrast features. Finally, k-nearest neighbor (k-NN), support vector machine (SVM), random forest (RF) and decision tree classifier were used to identify different odors. The results showed that using the above four classifiers, the classification accuracy of WEM feature was higher than other features, and the k-NN classifier combined with WEM feature had the highest classification accuracy (91.07%). This paper further explored the characteristics of different EEG frequency bands, and found that most of the classification accuracy based on the features of γ band was better than that of the full band and other bands, among which the WEM feature of the γ band combined with the k-NN classifier had the highest classification accuracy (93.89 %). The research results of this paper could provide a new objective basis for the evaluation of olfactory function. On the other hand, it could also provide new ideas for the study of olfactory-induced emotions.

     

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