Table 1 Model performance for phonon bandgap, speed of sound, and heat capacity.

Speed of
sound (km/s)
Heat capacity
(J mol−1 K−1)
Non-TL modelMAE: 23.847MAE: 0.501MAE: 6.002
R2: 0.764R2: 0.763R2: 0.883
TL modelMAE: 8.458MAE: 0.433MAE: 2.739
R2: 0.960R2: 0.838R2: 0.985
Learning from
full data
MAE: 0.455MAE: 2.390
R2: 0.870R2: 0.989