Table 2 Comparison of PE and FE indicators for noise reduction effects of five methods.
From: Chaotic signal denoising based on energy selection TQWT and adaptive SVD
Index | Type | Observed signal | ES-TQWT | FEM-SVD | CEEMDAN-WT | MEEMD-LMS | TQWT-ASVD |
|---|---|---|---|---|---|---|---|
PE | Small ship | 0.7860 | 0.6455 | 0.6354 | 0.6570 | 0.6659 | 0.6277 |
Cruise ship | 0.8626 | 0.5567 | 0.5620 | 0.5455 | 0.5404 | 0.4621 | |
Ferryboat | 0.7363 | 0.6582 | 0.6309 | 0.6359 | 0.6206 | 0.5667 | |
Cargo ship | 0.8374 | 0.6617 | 0.6986 | 0.6447 | 0.6595 | 0.5815 | |
FE | Small ship | 0.0222 | 0.0155 | 0.0146 | 0.0158 | 0.0179 | 0.0074 |
Cruise ship | 0.0044 | 0.0030 | 0.0030 | 0.0028 | 0.0029 | 0.0019 | |
Ferryboat | 0.0328 | 0.0306 | 0.0296 | 0.0278 | 0.0258 | 0.0203 | |
Cargo ship | 0.1323 | 0.0601 | 0.0602 | 0.0514 | 0.0646 | 0.0272 |
