## 6 Experiment Evaluation
### Evaluation Results
#### 6.2.2 EEG Sleep Relate Features
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Feature** & **Type II** & **Type IV** & \(p\)**-Value** \\ \hline \(RP_{(F_{D},g_{0},C_{3})}\) & 0.017 \(\pm\) 0.011 & 0.009 \(\pm\) 0.007 & 2.48 \(\times\) 10\({}^{-4}\) \\ \(RP_{(F_{T},g_{0},C_{3})}\) & 0.002 \(\pm\) 0.002 & 0.002 \(\pm\) 0.002 & 0.988 \\ \(RP_{(F_{T},g_{0},C_{3})}\) & 0.047 \(\pm\) 0.025 & 0.048\(\pm\) 0.024 & 0.954 \\ \(RP_{(F_{T},g_{0},C_{3})}\) & 0.009 \(\pm\) 0.01 & 0.018 \(\pm\) 0.015 & 0.020 \\ \(RP_{(F_{T},g_{0},C_{3})}\) & 0.006 \(\pm\) 0.004 & 0.008 \(\pm\) 0.005 & 0.052 \\ \(RP_{(F_{T},g_{0},C_{4})}\) & 0.014 \(\pm\) 0.008 & 0.009 \(\pm\) 0.003 & 0.007 \\ \(RP_{(F_{T},g_{0},C_{4})}\) & 0.002 \(\pm\) 0.002 & 0.002 \(\pm\) 0.001 & 0.419 \\ \(RP_{(F_{T},g_{0},C_{4})}\) & 0.055 \(\pm\) 0.031 & 0.048 \(\pm\) 0.024 & 0.263 \\ \(RP_{(F_{T},g_{0},C_{4})}\) & 0.011 \(\pm\) 0.012 & 0.018 \(\pm\) 0.014 & 0.047 \\ \(RP_{(F_{T},g_{0},C_{4})}\) & 0.007 \(\pm\) 0.005 & 0.008 \(\pm\) 0.004 & 0.396 \\ \hline \hline \end{tabular} These features are shown as: mean \(\pm\) std.  
\end{table} 
Table 5: A summary of theta power ratio features during different sleep stages. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Feature** & **Type II** & **Type IV** & \(p\)**-Value** \\ \hline \(RP_{(F_{D},C_{3})}\) & 0.761 \(\pm\) 0.188 & 0.795 \(\pm\) 0.087 & 0.156 \\ \(RP_{(F_{T},C_{3})}\) & 0.089 \(\pm\) 0.040 & 0.094 \(\pm\) 0.039 & 0.569 \\ \(RP_{(F_{T},C_{3})}\) & 0.073 \(\pm\) 0.173 & 0.044 \(\pm\) 0.033 & 0.051 \\ \(RP_{(F_{T},C_{3})}\) & 0.076 \(\pm\) 0.048 & 0.068 \(\pm\) 0.043 & 0.341 \\ \(RP_{(F_{T},C_{4})}\) & 0.793 \(\pm\) 0.083 & 0.784 \(\pm\) 0.109 & 0.748 \\ \(RP_{(F_{T},C_{4})}\) & 0.096 \(\pm\) 0.044 & 0.093 \(\pm\) 0.035 & 0.653 \\ \(RP_{(F_{T},C_{4})}\) & 0.045 \(\pm\) 0.057 & 0.05 \(\pm\) 0.057 & 0.762 \\ \(RP_{(F_{T},C_{4})}\) & 0.065 \(\pm\) 0.025 & 0.073 \(\pm\) 0.055 & 0.528 \\ \hline \hline \end{tabular} These features are shown as: mean \(\pm\) std.  
\end{table} 
Table 3: A summary of different frequency bands’ power ratio features. \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Feature** & **Type II** & **Type IV** & \(p\)**-Value** \\ \hline \(RP_{(F_{D},C_{3})}\) & 0.761 \(\pm\) 0.188 & 0.795 \(\pm\) 0.087 & 0.156 \\ \(RP_{(F_{T},C_{3})}\) & 0.089 \(\pm\) 0.040 & 0.094 \(\pm\) 0.039 & 0.569 \\ \(RP_{(F_{T},C_{3})}\) & 0.073 \(\pm\) 0.173 & 0.044 \(\pm\) 0.033 & 0.051 \\ \(RP_{(F_{T},C_{3})}\) & 0.076 \(\pm\) 0.048 & 0.068 \(\pm\) 0.043 & 0.341 \\ \(RP_{(F_{D},C_{4})}\) & 0.793 \(\pm\) 0.083 & 0.784 \(\pm\) 0.109 & 0.748 \\ \(RP_{(F_{T},C_{4})}\) & 0.096 \(\pm\) 0.044 & 0.093 \(\pm\) 0.035 & 0.653 \\ \(RP_{(F_{T},C_{4})}\) & 0.045 \(\pm\) 0.057 & 0.05 \(\pm\) 0.057 & 0.762 \\ \(RP_{(F_{T},C_{4})}\) & 0.065 \(\pm\) 0.025 & 0.073 \(\pm\) 0.055 & 0.528 \\ \hline \hline \end{tabular} These features are shown as: mean \(\pm\) std.  
\end{table} 
Table 4: A summary of delta power ratio features during different sleep stages. of stroke patients (i.e., Type II) are obviously larger than that of healthy individuals (i.e., Type IV). Moreover, to further characterize the differences between Type II and Type IV, we also calculated the relative power of different frequency bands during different sleep stages and different sleep cycles (from sleep cycle 1 to sleep cycle 5). However, as each frequency band has more than 50 features, we only list features of frequency band theta, due to the limited space available. Table 8 shows the comparison of the relative power of frequency band \(F_{T}\) on the EEG channel \(C_{x}\) during the \(j\)-th sleep stage of the \(k\)-th sleep cycle for ischemic stroke patients and control subjects, where \(x\in\{3,4\},j\in\{0,1,2,3,5\}\), and \(k\in\{1,2,3,4,5\}\). Meanwhile we also calculated the corresponding features of the other three frequency bands (i.e., delta, alpha, beta); they are far too numerous to list each of them individually. As shown in Table 8, we found that during sleep stage 0 of the 3  
in other waveforms (including delta, alpha, beta), it is more obvious in the theta band.