the addition of a new loss term

[Fankunkun123]

Hello, Professor @lululxvi and other professors.
At present, I have encountered some problems in using deepXDE library, please help to solve them. Thank you very much.

Question 1: When using deepXDE, what should I do if I want to add a new loss term to the total loss (the added loss term is different from the gradient boosting term in the gPINN article, the loss term I want to add is the loss that does not have the first and second derivatives of the equation, but is constructed using other arithmetic methods). ?

For example, if we want to add a new Loss to the total loss: L1=ax+bx+cx; Total Loss=Lpde+Lbc+L1.

I hope you can help me solve the problem, thank you very much .

[lululxvi]

The same. Just add the loss.