Table 1.
List of all variables used for comparing different varieties of the bioimpedance input data and hyperparameters in the machine learning for prediction of ischemic duration.
| Variable | Description | Tested levels | Values |
|---|---|---|---|
| Measurement noise | Setting for simulated input data | 3 | 0, 10, 30 |
| Liver variance | Setting for simulated input data | 2 | 5, 20 |
| Drift | Setting for simulated input data | 3 | 0 ±50 +100 |
| Frequencies | Selection of input variables | 3 | {102 104 106}, 101:7, 101:0.1:7 |
| Sample size | Training and testing data size | 2 | 20, 100 |
| Regularization | Neural network hyperparameter | 3 | 10-1, 10-2, 10-3 |
| Hidden layer size | Neural network hyperparameter | 3 | 2, 5, 25 |
| Minibatch size | Neural network hyperparameter | 2 | 16, 32 |
| Epochs | Neural network hyperparameter | 2 | 250, 500 |