Table 3. The numbers of network layers of the model and frozen network layers when fine-tuning.
| Model | Quantity of total layer | Quantity of frozen layer when fine-tuning |
|---|---|---|
| LSTM | 5 | 3 |
| Bi-LSTM | 5 | 3 |
| GRU | 5 | 3 |
| IndRNN | 4 | 2 |
| Stacked_Bi_GRU | 14 | 10 |
| CNN_LSTM | 19 | 14 |
| Deep_CNN | 8 | 7 |