Hong-wei DUAN, Mei GUO, Rong-guang ZHU, Qi-jian NIU. LIBS Quantitative Analysis of Calorific Value of Straw Charcoal Based on XY Bivariate Feature Extraction Strategy[J]. Spectroscopy and Spectral Analysis, 2022, 42(11): 3435
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 11, 3435 (2022)
Fig. 1. XY bivariate feature extraction strategy
Fig. 2. LIBS spectral analysis
Fig. 3. Threshold selection of regression coefficient method
(a): Full band PLSR model regression coefficient; (b): Model results with different regression coefficient thresholds
(a): Full band PLSR model regression coefficient; (b): Model results with different regression coefficient thresholds
Fig. 4. XY bivariate feature extraction results
(a):XY bivariate feature extraction results; (b): Comparison of three feature variable model
(a):
Fig. 5. Optimization of GA and Adaboost parameters
(a): GA parameter optimization; (b): Adaboost parameter optimization
(a): GA parameter optimization; (b): Adaboost parameter optimization
Fig. 6. Model prediction results
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Table 1. Statistical results of CV and main element content
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Table 2. Correlation analysis between CV and elements
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