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Table 2.
Investigated (Col. 2) and best-performing (Cols. 3–7) hyperparameters from the model selection for each solar wind parameter.
| Hyperparameter | Tested hyperparameter | B | nO^7+/nO^6+ | np | Tp | vp |
|---|---|---|---|---|---|---|
| nh | [10, 20, 50, 100] | 10 | 10 | 10 | 10 | 10 |
| Iterations | 200 | 200 | 200 | 200 | 200 | 200 |
| Activation function | relu | relu | relu | relu | relu | relu |
| Logarithmic nO^7+/nO^6+ | True | True | True | True | True | True |
| Solver | adam | adam | adam | adam | adam | adam |
| λ | [0.01, 0.001, 0.0001] | 0.001 | 0.001 | 0.001 | 0.01 | 0.001 |
| β1 | [0.75, 0.8, 0.85, 0.9, 0.95, 0.99] | 0.99 | 0.9 | 0.75 | 0.9 | 0.95 |
| β2 | [0.8, 0.85, 0.9, 0.95, 0.99, 0.999] | 0.95 | 0.999 | 0.9 | 0.999 | 0.999 |
| ϵ | [10−6, 10−7, 10−8, 10−9, 10−10] | 1e−09 | 1e−09 | 1e−08 | 1e−06 | 1e−06 |
| α | [0.001, 0.0001, 0.00001] | 0.0001 | 1e−05 | 0.001 | 0.0001 | 0.001 |
Notes. The best hyperparameters are used in the final model as well as in the Monte Carlo error simulations.
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