State Diagnosis of Elevator Control Transformer over Vibration Signal Based on MEA-BP Neural Network

Table 1

Denoising performance of different wavelet functions.

db N		sym N		biorNr.Nd
dbN	PSNR (dB)	sym N	PSNR (dB)	biorNr.Nd	PSNR (dB)
Db1	21.1756	sym1	21.2425	bior1.1	21.1033
Db2	22.1503	sym2	21.8625	bior1.3	21.4539
Db3	22.6234	sym3	22.0526	bior1.5	21.3648
Db4	22.7801	sym4	22.9627	bior2.2	22.9247
Db5	22.6018	sym5	23.6429	bior2.4	23.1184
Db6	22.4085	sym6	24.5392	bior3.3	24.0186
Db7	22.0049	sym7	24.3201	bior4.4	23.8254
Db8	21.7803	sym8	23.9827	Bior5.5	22.1622