图  1  WT-EEMD-ICA算法框图

Fig.  1  The block of WT-EEMD-ICA algorithm

图  2  实验设计框图

Fig.  2  The block of experiment design

图  3  EEG$_{\rm ac}$和EOG$_{\rm ac}$波形

Fig.  3  Wave of EEG$_{\rm ac}$和EOG$_{\rm ac}$

图  4  $P1$段EEG$_{\rm ac}$和EOG$_{\rm ac}$波形

Fig.  4  Wave of EEG$_{\rm ac}$和EOG$_{\rm ac}$ in $P1$

图  5  带通滤波前后EEG与EOG信号对比

Fig.  5  EEG and EOG processed by band pass filter

图  6  带阻滤波前后EEG与EOG信号对比

Fig.  6  EEG and EOG processed by band stop filter

图  7  EEG信号小波分解图

Fig.  7  Wavelet coefficients of EEG

图  8  $d4$小波系数EEMD结果图

Fig.  8  The EEMD results of $d4$

图  9  $d4$小波系数ICA结果图

Fig.  9  The ICA results of $d4$

图  10  $d4$小波系数WT-EEMD-ICA结果

Fig.  10  The WT-EEMD-ICA results of $d4$

图  11  $d3$小波系数WT-EEMD-ICA结果

Fig.  11  The WT-EEMD-ICA results of $d3$

图  12  $P1$段信号WT-EEMD-ICA结果

Fig.  12  The WT-EEMD-ICA results of signals in $P1$

图  13  $P2$段信号WT-EEMD-ICA结果

Fig.  13  The WT-EEMD-ICA results of signals in $P2$

图  14  $P1+P2$段信号WT-EEMD-ICA结果

Fig.  14  The WT-EEMD-ICA results of signals in $P1+P2$

图  15  WT-EEMD-ICA算法稳定性实验结果

Fig.  15  Stability results of WT-EEMD-ICA

图  16  $P1$段信号WT算法结果

Fig.  16  The WT algorithm results of signals in $P1$

图  17  $P1$段信号WT-ICA算法结果

Fig.  17  The WT-ICA algorithm results of signals in $P1$

图  18  $P1$段信号EEMD-ICA算法结果

Fig.  18  The EEMD-ICA algorithm results of signals in $P1$

图  19  $P1$段信号DE-ICA算法结果

Fig.  19  The DE-ICA algorithm results of signals in $P1$

图  20  $P1$段信号HHT算法结果

Fig.  20  The HHT algorithm results of signals in $P1$