Fig. 1. Framework of PIML model

Fig. 2. Structural diagram of MLP

Fig. 3. Structural diagram of decision tree

Fig. 4. Structural diagram of RF model

Fig. 5. HTC experimental data distribution of mass flux (a), pressure (b) and equilibrium quality (c)

Fig. 6. Relationship between the number of MLP hidden layer neurons and the error in the HTC model

Fig. 7. Relationship between the number of BPNN hidden layer neurons and the error in the HTC model

Fig. 8. Relationship between the number of RF decision trees and the error in the HTC model

Fig. 9. Prediction results of experimental data by six HTC models, MLP_Thom (a), MLP_JL (b), BPNN_Thom (c), BPNN_JL (d), RF_Thom (e) and RF_JL (f)

Fig. 10. Cumulative data fraction of MAPE in models associated with Thom (a) and Jens-Lottes (b)