Table 4.
The sampling parameters of historical data in each group.
| 1 July | 4 August | 28 August | 18 September | |
|---|---|---|---|---|
| Sampling length | 2,048 | 2,048 | 2,048 | 2,048 |
| Sampling frequency | 10 kHz | 4 kHz | 4 kHz | 4 kHz |
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