Research on Noise Reduction Method of Pressure Pulsation Signal of Draft Tube of Hydropower Unit Based on ALIF-SVD

Table 1

Related index values.

	Correlation coefficient	Signal-to-noise ratio	Mean square error
ALIF	0.7091	3.0043	0.3961
EMD	0.5016	1.2394	0.6984
EMD-SVD	0.9591	10.9018	0.1175
ALIF-SVD	0.9700	12.2365	0.0987