Zhi-yuan LI, Fan DENG, Jun-liang HE, Wei WEI. Hyperspectral Estimation Model of Heavy Metal Arsenic in Soil[J]. Spectroscopy and Spectral Analysis, 2021, 41(9): 2872
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 9, 2872 (2021)
Fig. 1. Study area and the distribution of the soil sampling points
Fig. 2. Transformed soil reflectance spectra after
Fig. 3. Smoothed reflectance spectra of soil samples
Fig. 4. Continuum removal correlation coefficient curve
Fig. 5. Scatter plots of fitting and testing sets for MLSR
(a): Fitting set; (b): Testing set
(a): Fitting set; (b): Testing set
Fig. 6. Scatter plots of the two set of samples of fitting and testing for M-PLSR
(a):Fitting samples; (b): Testing samples
(a):Fitting samples; (b): Testing samples
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Table 1. Descriptive statistics of the arsenic content (mg·kg-1) in soil
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Table 2. Statistical results of single factor pollution index of the soil arsenic
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Table 3. Maximum correlation coefficients of heavy metal As content and spectral indexes
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Table 4. Results of MLSR model
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Table 5. Results of U-PLSR model
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Table 6. Results of M-PLSR model
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