[1] [1] JIAO Y, LI Z, CHEN X, et al. Preprocessing methods for near-infrared spectrum calibration[J]. Journal of Chemometrics, 2020, 34(11): e3306.

[2] [2] YANG J, DU L, GONG W, et al. Analyzing the performance of the first-derivative fluorescence spectrum for estimating leaf nitrogen concentration[J]. Optics Express, 2019, 27(4): 3978.

[3] [3] LI Y, HUANG Y, XIA J, et al. Quantitative analysis of honey adulteration by spectrum analysis combined with several high-level data fusion strategies[J]. Vibrational Spectroscopy, 2020, 108: 103060.

[5] [5] Bastiaansen W, Klein S, Steegers㏕ heunissen R P, et al. VP24.02: towards a novel human embryonic brain atlas: fully automated preprocessing of prenatal ultrasound using artificial intelligence[J]. Ultrasound in Obstetrics and Gynecology, 2020, 56(S1): 159-159.

[6] [6] HUANG X, HUANG C, ZHAI G, et al. Data processing method of multibeam bathymetry based on sparse weighted LS-SVM machine algorithm[J]. IEEE Journal of Oceanic Engineering, 2019, 45(4): 1538-1551.

[7] [7] DING Y, ZHANG W, ZHAO X, et al. A hybrid random forest method fusing wavelet transform and variable importance for the quantitative analysis of K in potassic salt or using laser-induced breakdown spectroscopy[J]. Journal of Analytical Atomic Spectrometry, 2020, 35(6): 1131-1138.

[8] [8] ZHANG J, WEN H, TANG L. Improved smoothing frequency shifting and filtering algorithm for harmonic analysis with systematic error compensation[J]. IEEE Transactions on Industrial Electronics, 2019, 66(12): 9500-9509.

[10] [10] Mahajan G R, Das B, Gaikwad B, et al. Monitoring properties of the salt-affected soils by multivariate analysis of the visible and near- infrared hyperspectral data[J]. Catena, 2021, 198: 105041.

[12] [12] Zikiou N, Lahdir M, Helbert D. Hyperspectral image classification using graph-based wavelet transform[J]. International Journal of Remote Sensing, 2020, 41(7): 2624-2643.

[13] [13] Bunaciu A A, Aboul-Enein H Y. Adulterated drug analysis using FTIR spectroscopy[J]. Applied Spectroscopy Reviews, 2021, 56(5): 423-437.

[14] [14] LIU F, ZHANG Y, Yildirim T, et al. Signal denoising optimization based on a Hilbert-Huang transform-triple adaptable wavelet packet transform algorithm[J]. EPL (Europhysics Letters), 2019, 124(5): 54002.

[15] [15] ZHANG M, LU C, LIU C. Improved double-threshold denoising method based on the wavelet transform[J]. OSA Continuum, 2019, 2(8): 2328-2342.