Figure 2:

Problem setup of example 1: the synthetic data sets. (a) A unit square specimen subject to uniaxial tension with Neumann-type boundary condition. (b) & (c) Visualization of an instances of the loading field $T_y\left(x\right)$, and the corresponding ground-truth solutions $u^{\eta }\left(x\right)$ from the in-distribution and out-of-distribution tasks, showing the solution diversity across different tasks, due to the change of underlying hidden material parameter set. □