Shiwei Bai, Gang Sun, Xuebin Li, Qing Liu, Ningquan Weng. Application of Wavelet Analysis in Research of Near-Surface Turbulence Coherent Structure[J]. Acta Optica Sinica, 2018, 38(5): 0501002
- Acta Optica Sinica
- Vol. 38, Issue 5, 0501002 (2018)
Fig. 1. Time scale map of wavelet coefficient of F(t)
Fig. 2. Wavelet energy diagram of F(t)
Fig. 3. (a) Comparison of F(t) and f(a*,t); (b) comparison of f(t) and f(a*,t)
Fig. 4. (a) Time scale map of wavelet coefficient of U1; (b) time series of U1
Fig. 5. Time scale map of wavelet coefficient of wind velocity fluctuation. (a) V1; (b) W1
Fig. 6. Wavelet energy curves of three-dimensional wind velocity fluctuation. (a) U1; (b) V1; (c) W1
Fig. 7. Comparison of wind velocity fluctuation signal and coherent waveform signal. (a) U1; (b) V1; (c) W1
Fig. 8. Probability distributions of reconstructed deviation. (a) ΔU1; (b) ΔV1; (c) ΔW1
Fig. 9. Comparison of power spectra of wind velocity fluctuation and coherent signals. (a) U1; (b) V1; (c) W1
Fig. 10. Probability distributions of coherent structure at different scales. (a) U1; (b) V1; (c) W1
Fig. 11. Probability distribution of period and scale ratio of coherent structure
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