Table 5. RMSE Values of Individual HDNNPs and the Ensemble Trained on Reference Data Set C Using Learning on a Stationary Batch of All Training Data and Lifelong Learninga.
Individual HDNNPs | Stationary data | Lifelong learning |
---|---|---|
RMSE(Etrain)/meV atom–1 | 6.1 ± 0.2 | 6.9 ± 0.6 |
RMSE(Etest)/meV atom–1 | 6.8 ± 0.2 | 7.8 ± 0.5 |
RMSE(Fα,ntrain)/meV Å–1 | 168 ± 3 | 185 ± 12 |
RMSE(Fα,ntest)/meV Å–1 | 182 ± 4 | 205 ± 10 |
Ensemble | ||
---|---|---|
RMSE(E)/meV atom–1 | 4.3 | 4.5 |
RMSE(Fα,n)/meV Å–1 | 121 | 122 |
In lifelong learning, only the conformations of reference data set B were trained for the initial 1250 epochs and then the additional conformations of reference data set C were added. The CoRe optimizer with β1b = 0.7 and lifelong adaptive data selection were applied for 2500 epochs.