Approach to Predict Land Subsidence in Old Goafs considering the Influence of Engineering Noise

Table 4

RMSE and SNR of different DB functions under different decomposition levels.

DB function	Decomposition layer	SNR	RMSE
DB2	1	39.062	0.092
	2	35.891	0.157
DB3	1	39.790	0.081
	2	37.988	0.122
DB4	1	41.289	0.073
	2	42.169	0.098
DB5	1	43.691	0.063
	2	37.232	0.119
DB6	1	45.061	0.060
	2	37.040	0.115
DB7	1	43.678	0.065
	2	41.029	0.090
DB8	1	41.810	0.071
	2	39.395	0.105