Study on denoising of continuous spectrum on-line monitoring signal of water quality with micro-reagents based on HHT

Wen LI; Binbin Lü; Hao FU; Yongqing and CAI

doi:10.1007/s11801-022-1105-y

[1] HARVIE A J, DEMELLO J C, et al. Optical determination of flow-rate and flow-uniformity in segmented flows[J]. Chemical engineering journal, 2020, 394: 124908.

[2] YIN M Q, HU X F, SUN Y N, et al. Broad-spectrum detection of zeranol and its analogues by a colloidal gold-based lateral flow immunochromatographic assay in milk[J]. Food chemistry, 2020, 321:126697.

[3] HAN B, ZHANG Y N, WANG X, et al. Non-contact flow rate detection of component in mixed gas using spectrum absorption theory[J]. Optical fiber technology, 2018, 45:167-172.

[4] ZHANG R R, MA S, ERDAL S, et al. Hilbert-Huang transform analysis of dynamic and earthquake motion recordings[J]. Journal of engineering mechanics, 2003, 129(8):861-875.

[5] WU Z H, HUANG N E. A study of the characteristics of white noise using the empirical mode decomposition method[J]. The royal society, 2004, 460:1597-1611.

[6] ZHAO Y, ZHANG H W. Displacement measurement method based on laser self-mixing interference in the presence of speckle[J]. Chinese optics letters, 2020, 18(5):051201.

[7] HUANG N E, ZHENG S, LONG S R. A new view of non-linear water waves—Hilbert spectrum[J]. Annual review of fluid mechanics, 1999, 31:417-457.

[8] HUANG N E, ZHENG S, LONG S R, et al. The empirical mode decomposition and Hilbert spectrum for non-linear and nonstationary time series analysis[J]. The royal society, 1998, 454:903-995.

[9] CHEN H K, WANG T F, WU S S, et al. Research on separation and enhancement of speech micro-vibration from macro motion[J]. Optoelectronics letters, 2020, 16(06):462-466.

[10] LUPIERI G, CONTENTO G. Numerical simulations of 2-D steady and unsteady breaking waves[J]. Ocean engineering, 2015, 106:298-316.

[11] FAN G, ZHANG J J, FU X, et al. Dynamic failure mode and energy-based identification method for a counter-bedding rock slope with weak intercalated layers[J]. Journal of mountain science, 2016, 13(12): 2111-2123.

[12] PENG J. Hilbert-Huang transform (HHT) based analysis of signal characteristics of vortex flowmeter in oscillatory flow[J]. Flow measurement & instrumentation, 2012, 26(4):37-45.

[13] PENG J, FANG M. Response of a dual triangulate bluff body vortex flowmeter to oscillatory flow[J]. Flow measurement and instrumentation, 2014, 35:16-27.

[14] WANG X P, HUANG S X, KANG C, et al. Integration of wavelet denoising and HHT applied to the analysis of bridge dynamic characteristics[J]. Applied sciences, 2020, 10(10):3605.

[15] YANG Y J, WANG Z Y, YANG X P, et al. Signal processing of fluorescent optical fiber temperature measurement based on Hilbert-Huang transform[J]. Advanced materials research, 2014, 1052:447-453.

[16] ZHANG X J, HUO Y, WAN D S. Improved EMD based on piecewise cubic Hermite interpolation and mirror extension[J]. Chinese journal of electronics, 2020, 29(05):899-905.

[17] YANG K M, WANG G P, FU P J, et al. A model on extracting the pollution information of heavy metal copper ion based on the soil spectra analyzed by HHT in time-frequency[J]. Spectroscopy and spectral analysis, 2018, 38(2):564. (in Chinese)

[18] LI W, WANG L M, CHANG L, et al. Sequential injection-continuous spectroscopy based multi-parameter method for water quality analysis[J]. Spectroscopy and spectral analysis, 2021, 41(02):612-617.

[19] DONG Z K, SONG Y R, XU R Q, et al. Broadband spectrum generation with compact Yb-doped fiber laser by intra-cavity cascaded Raman scattering[J]. Chinese optics letters, 2017, 15(07):80-83.

[20] ZHU X B. A novel FBG velocimeter with wind speed and temperature synchronous measurement[J]. Optoelectronics letters, 2018, 14(04):276-279.