Rui LI, Bo LI, Xue-wen WANG, Tao LIU, Lian-jie LI, Shu-xiang FAN. A Classification Method of Coal and Gangue Based on XGBoost and Visible-Near Infrared Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2022, 42(9): 2947
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 9, 2947 (2022)
Fig. 1. Coal samples (a, c, e) and gangue samples (b, d, f) from different coal mines
(a), (b): Ximing coal mine; (c), (d): Shenmu coal mine; (e), (f): Balongtu coal mine
(a), (b): Ximing coal mine; (c), (d): Shenmu coal mine; (e), (f): Balongtu coal mine
Fig. 2. Visible and near-infrared spectroscopy collection system
Fig. 3. Spectra of coal and gangue in Ⅰ: (a)(b), Ⅱ: (c)(d), Ⅲ: (e)(f) mines after pretreatment
Fig. 4. The process of variable selection by RFE
Fig. 5. The process of variable selection by SPA
Fig. 6. The process of variable selection by CARS
Fig. 7. The variables selection process of the test group by RFE
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Table 1. Samples information
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Table 2. Comparison of different classification models based on the full-band spectra
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Table 3. The prediction results of different classification models based on characteristic wavelengths
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Table 4. The model prediction results of the test group
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