Table 2.
Time-domain features of pulse signals
| Feature types | Features | Feature names |
|---|---|---|
| Magnitude feature | h1 | Amplitude of main wave peak |
| h2 | Amplitude of main wave gap | |
| h3 | Amplitude of tidal wave peak | |
| h4 | Amplitude of dicrotic notch | |
| h5 | Amplitude of dicrotic wave | |
| Duration feature | t1 | Time from the start point to the main wave peak |
| t2 | Time from the start point to the main wave gap | |
| t3 | Time from the start point to the tidal wave peak | |
| t4 | Time from the start point to the dicrotic notch | |
| t5 | Time from the dicrotic notch to the end point | |
| T | Pulse cycle | |
| w1 | 1/3 pulse width | |
| w2 | 1/5 pulse width | |
| Proportional feature | t1/T | The ratio of the duration from the start point and the main wave peak to pusle cycle |
| t1/t4 | The ratio of the duration from the start point and the main wave peak to the one from the start point and the dicrotic notch | |
| t5/t4 | The ratio of the duration from the dicrotic notch and the end point to the one from the start point and the dicrotic notch | |
| w1/T | Time ratio of 1/3 pulse width to pulse cycle | |
| w2/T | Time ratio of 1/5 pulse width to pulse cycle | |
| h3/h1 | Amplitude ratio of tidal wave peak to main wave peak | |
| h4/h1 | Amplitude ratio of dicrotic notch to main wave peak | |
| h5/h1 | Amplitude ratio of dicrotic wave to main wave peak |