[1] Dai H J, Li L Z. Establishment of edible cyanine concentration model based on absorption spectroscopy [J]. Chinese Journal of Quantum Electronics, 2018, 35(6): 649-652.

[2] Sun X D, Liu Y D, Li Y F, et al. Simultaneous measurement of brown core and soluble solids content in pear by on-line visible and near infrared spectroscopy [J]. Postharvest Biology and Technology, 2016, 116: 80-87.

[3] Xu H R, Li Q Q. Calibration model transfer between visible/NIR spectrometers in sugar content on-line detection of crown pears [J]. Transactions of the Chinese Society for Agricultural Machinery, 2017, 48(9): 312-317.

[4] Guo Z M, Chen Q S, Zhang B, et al. Design and experiment of handheld near-infrared spectrometer for determination of fruit and vegetable quality [J]. Transactions of the Chinese Society of Agricultural Engineering, 2017, 33(8): 245-250.

[5] Ncama K, Opara U L, Tesfay S Z, et al. Application of Vis-NIR spectroscopy for predicting sweetness and flavour parameters of ‘Valencia’ orange (Citrus sinensis) and ‘Star Ruby’ grapefruit (Citrus x paradisi Macfad) [J]. Journal of Food Engineering, 2017, 193: 86-94.

[6] Gao S, Wang Q H, Li Q X, et al. Non-destructive detection of vitamin C, sugar content and total acidity of red globe grape based on near-infrared spectroscopy [J]. Chinese Journal of Analytical Chemistry, 2019, 47(6): 941-949.

[7] Zhang Q, Zhang S Q, Jiang H. Determination of malic acid in apples by visible absorption spectrometry [J]. Chemical Research and Application, 2017, 29(11): 1719-1722.

[8] Yang L, Jin W T, Zhou Z H. Synthesis, spectral and structural characterization of vanadium lactate, malate and citrate with large counter cation [J]. Journal of Molecular Structure, 2020, 1207: 127805.

[9] Hu W H. Rapid and Non-destructive Detection of Soluble Sugars and Organic Acids Metabolism in Ripening Kiwifruit by Hyperspectral Imaging [D]. Guangzhou: South China University of Technology, 2017.

[10] Chu X L. Molecular Spectroscopy Analytical Technology Combined With Chemometrics and Its Applications [M]. Beijing: Chemical Industry Press, 2011: 79-81.

[11] Wang C Y, Ma Y H, Fan S, et al. Rapid determination of single brown-rice kernels moisture content using near-infrared spectroscopy [J]. Chinese Journal of Quantum Electronics, 2018, 35(2): 136-141.

[12] Soares S F C, Gomes A A, Araujo M C U, et al. The successive projections algorithm [J]. TrAC Trends in Analytical Chemistry, 2013, 42: 84-98.

[13] Li H D, Liang Y Z, Xu Q S, et al. Key wavelengths screening using competitive adaptive reweighted sampling method for multivariate calibration [J]. Analytica Chimica Acta, 2009, 648(1): 77-84.

[14] Andries J P M, Vander Heyden Y, Buydens L M C. Improved variable reduction in partial least squares modelling by global-minimum error uninformative-variable elimination [J]. Analytica Chimica Acta, 2017, 982: 37-47.

[15] Fan S X, Li J B, Xia Y, et al. Long-term evaluation of soluble solids content of apples with biological variability by using near-infrared spectroscopy and calibration transfer method [J]. Postharvest Biology and Technology, 2019, 151: 79-87.

[16] Jiang W, Fang J L, Wang S W, et al. Using CARS-SPA algorithm combined with hyperspectral to determine reducing sugars content in potatoes [J]. Journal of Northeast Agricultural University, 2016, 47(2): 88-95.

[17] Feng D, Ji J W, Zhang L, et al. Optimal wavelengths extraction of apple brix and firmness based on hyperspectral imaging [J]. Chinese Journal of Luminescence, 2017, 38(6): 799-806.

[18] Liu Y D, Xu H, Sun X D, et al. Development of multi-cultivar universal model for soluble solid content of apple online using near infrared spectroscopy [J]. Spectroscopy and Spectral Analysis, 2020, 40(3): 922-928.

[19] Wang F, Li Y Y, Peng Y K, et al. Nondestructive determination of lycopene content based on visible/near infrared transmission spectrum [J]. Chinese Journal of Analytical Chemistry, 2018, 46(9): 1424-1431.

[20] Fan S X, Huang W Q, Guo Z M, et al. Prediction of soluble solids content and firmness of pears using hyperspectral reflectance imaging [J]. Food Analytical Methods, 2015, 8(8): 1936-1946.

[21] Guo W C, Shang L, Zhu X H, et al. Nondestructive detection of soluble solids content of apples from dielectric spectra with ANN and chemometric methods [J]. Food and Bioprocess Technology, 2015, 8(5): 1126-1138.

[22] Tong P J, Du Y P, Zheng K Y, et al. Improvement of NIR model by fractional order Savitzky-Golay derivation (FOSGD) coupled with wavelength selection [J]. Chemometrics and Intelligent Laboratory Systems, 2015, 143: 40-48.

[23] Zhang Q X, Li Q B, Zhang G J. Rapid determination of leaf water content using VIS/NIR spectroscopy analysis with wavelength selection [J]. Spectroscopy: An International Journal, 2012, 27(2): 276795.

[24] Li W B, Lu J D, Dong M R, et al. Quantitative analysis of calorific value of coal based on spectral preprocessing by laser-induced breakdown spectroscopy (LIBS) [J]. Energy & Fuels, 2018, 32(1): 24-32.