Table 6.
Summary of high-order statistics features.
| Feature index | Feature name | Physical Meaning |
|---|---|---|
| 1 | m_S1_skewness | mean value of the skewness of S1 |
| 2 | sd_S1_skewness | SD of the skewness of S1 |
| 3 | m_S1_kurtosis | mean value of the kurtosis of S1 |
| 4 | sd_S1_kurtosis | SD of the kurtosis of S1 |
| 5 | m_S2_skewness | mean value of the skewness of S2 |
| 6 | sd_S2_skewness | SD of the skewness of S2 |
| 7 | m_S2_kurtosis | mean value of the kurtosis of S2 |
| 8 | sd_S2_kurtosis | SD of the kurtosis of S2 |
| 9 | m_sys_skewness | mean value of the skewness of systole |
| 10 | sd_sys_skewness | SD of the skewness of systole |
| 11 | m_sys_kurtosis | mean value of the kurtosis of systole |
| 12 | sd_sys_kurtosis | SD of the kurtosis of systole |
| 13 | m_dia_skewness | mean value of the skewness of diastole |
| 14 | sd_dia_skewness | SD of the skewness of diastole |
| 15 | m_dia_kurtosis | mean value of the kurtosis of diastole |
| 16 | sd_dia_kurtosis | SD of the kurtosis of diastole |