Table 1.

The mean square error of CNN models with different hyperparameters obtained during cross-validation.

Number of convolutional layers ($\mathit{M}$)	Filter size ($\mathit{s}\times \mathit{s})$
	$3\times 3$	$5\times 5$	$7\times 7$
2 layers	1.38 × 10−4	8.76 × 10−5	7.51 × 10−5
3 layers	4.44 × 10−4	1.09 × 10−4	1.13 × 10−4
4 layers	2.14 × 10−3	6.17 × 10−4	—