张元馨

Cannot convert a symbolic tf.Tensor (Placeholder_6:0) to a numpy array

4

``` def pde2(x, y): dy_x = dde.grad.jacobian(y, x, i=0, j=0) dy_t = dde.grad.jacobian(y, x, i=0, j=1) dy_xx = dde.grad.hessian(y, x, i=0, j=0) y_pred_value = model.predict(x) return dy_t + y_pred_value *...