The dispersion σ of the difference between the APOGEE_payne catalog and LASP estimations or the LASSO-MLPNet predictions. The red solid line and the green dashed line are respectively the dependencies of the dispersions of the differences between the APOGEE_payne catalog and the LASSO-MLPNet predictions, and between the APOGEE_payne catalog and LASP estimations, on SNRg. The evaluation results of this experiment are calculated on test set 1 and test set 2.