Short-term interpolation accuracy and long-horizon extrapolation behavior of baseline models and the proposed PINN framework
| Model | Test RMSE (0–180 days) | Long-horizon extrapolation behavior |
|---|---|---|
| Linear regression | 0.025 | Smooth but systematically biased degradation trend |
| SVR (RBF kernel) | 0.014 | Increased sensitivity and oscillatory extrapolation behavior |
| ANN | 0.011 | Strong short-term fitting but reduced long-term physical interpretability |
| PINN (proposed) | 0.010 | Stable and physically consistent long-horizon degradation prediction |
| Model | Test RMSE (0–180 days) | Long-horizon extrapolation behavior |
|---|---|---|
| Linear regression | 0.025 | Smooth but systematically biased degradation trend |
| SVR (RBF kernel) | 0.014 | Increased sensitivity and oscillatory extrapolation behavior |
| ANN | 0.011 | Strong short-term fitting but reduced long-term physical interpretability |
| PINN (proposed) | 0.010 | Stable and physically consistent long-horizon degradation prediction |
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