Search ranges and hyperparameters explored during architecture tuning of FNN-based surrogate model
| Hyperparameter | Search range/options | Description |
|---|---|---|
| Activation function | ReLU, tanh, ELU, softplus | Activation function for hidden dense layers |
| Number of dense layers | 1–3 | Number of dense hidden layers |
| Dense neurons per layer | 16–256 (step 16) | Number of neurons in each dense layer |
| Learning rate | 1 × 10−5 to 1 × 10−1 | Learning rate for Adam optimiser |
| Batch size | {16, 32, 64, 128} | Number of samples processed together in one training step |
| Hyperparameter | Search range/options | Description |
|---|---|---|
| Activation function | ReLU, tanh, ELU, softplus | Activation function for hidden dense layers |
| Number of dense layers | 1–3 | Number of dense hidden layers |
| Dense neurons per layer | 16–256 (step 16) | Number of neurons in each dense layer |
| Learning rate | 1 × 10−5 to 1 × 10−1 | Learning rate for Adam optimiser |
| Batch size | {16, 32, 64, 128} | Number of samples processed together in one training step |
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