Wen YOU, Yang-peng XIA, Yu-tao HUANG, Jing-jun LIN, Xiao-mei LIN. Research on Selection Method of LIBS Feature Variables Based on CART Regression Tree[J]. Spectroscopy and Spectral Analysis, 2021, 41(10): 3240
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 10, 3240 (2021)
Fig. 1. Schematic diagram of experimental device
Fig. 2. Single variable calibration curve of CaⅡ 393.366 nm
Fig. 3. Partial least squares regression calibration curve
Fig. 4. The importance distribution of feature variables
Fig. 5. CART regression tree calibration curve
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Table 1. The concentration of Ca in standard samples
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Table 2. Comparison of calibration model parameters
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