Yuan FANG, Zhang-ping HE, Shi-chao ZHU, Xian-rong LIANG, Gang JIN. In-Line Identification of Different Grades of GPPS Based on Near-Infrared Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2021, 41(9): 2759
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 9, 2759 (2021)
Fig. 1. Schematic diagram of in-line near-infrared spectral measurement system
Fig. 2. (a) In-line NIR spectra of different grades of GPPS, (b) Changes in characteristic peaks of in-line NIR spectra of different grades of GPPS
Fig. 3. Explained variance contribution of principal components of in-line NIR spectra
Fig. 4. K-means clustering result of in-line NIR spectra of different grades of GPPS
Fig. 5. Relationship between PRESS and the number of principal components
Fig. 6. Identification results for different grades of GPPS in validation set
(a): PLS-DA model; (b): RF model
(a): PLS-DA model; (b): RF model
Fig. 7. Relationship between maximum depth of CART and classification accuracy of different grades of GPPS
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Table 1. Identification results of different grades of GPPS based on the PLS-DA algorithm
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Table 2. Identification results of different grades of GPPS based on the RF algorithm
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