  ![Effect of mismatched *Q* on the errors in the eigenvalues for multiple runs of a problem with a small number of DoFs with system noise.](pone.0000000.g000){#pone.0000000.g000}  ![Effect of mismatched *Q* on the errors in the reconstructed data for multiple runs of a problem with a small number of DoFs with system noise.](pone.0000000.g000){#pone.0000000.g000}  Then, the e