Guo-liang WANG, Ke-qiang YU, Kai CHENG, Xin LIU, Wen-jun WANG, Hong LI, Er-hu GUO, Zhi-wei LI. Hyperspectral Technique Coupled With Chemometrics Methods for Predicting Alkali Spreading Value of Millet Flour[J]. Spectroscopy and Spectral Analysis, 2021, 41(10): 3189
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 10, 3189 (2021)
Fig. 1. Average spectral curves of millet flour
Fig. 2. Selection of key variables using CARS algorithm
(a): Changing trend of the number of sampled variables; (b): Variation of root-mean-square error of cross-validation values;(c): Regression coefficients of each variable with the increasing of sampling runs
(a): Changing trend of the number of sampled variables; (b): Variation of root-mean-square error of cross-validation values;(c): Regression coefficients of each variable with the increasing of sampling runs
Fig. 3. Selection probabilities of each wavelength using RF algorithm
Fig. 4. The fit of training set and prediction set pretreated by MSC
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Table 1. Statistic results of alkali spreadingvalues in millet flour
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Table 2. PLSR modeling results of different methods based on key wavelengths extraction
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Table 3. Analysis results of PLSR models by different pretreatments
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Table 4. PLSR predictive modeling results of different key wavelengths extractions pretreated by MSC
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