Table 2.

Comparison of the structure of SAE-DNNs.

Hidden Layers	Hidden Units	MSE	${\mathit{R}}^2$
3	[100, 100, 100]	66.14	0.66
3	[200, 200, 200]	60.25	0.69
3	[400, 400, 400]	59.54	0.72
4	[100, 100, 100, 100]	46.28	0.78
4	[100, 200, 200, 100]	43.85	0.81
4	[200, 200, 200, 200]	42.36	0.83
4	[200, 400, 400, 200]	40.25	0.86
5	[400, 400, 400, 400]	41.89	0.85
5	[400, 800, 800, 400]	42.69	0.83

The bold denotes to the best performance.