Dong-sheng WANG, Hai-long WANG, Fang ZHANG, Lin-fang HAN, Yun LI. Near-Infrared Spectral Characteristics of Sandstone and Inversion of Water Content[J]. Spectroscopy and Spectral Analysis, 2022, 42(11): 3368

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- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 11, 3368 (2022)

Fig. 1. Rock sample and its test point location (red dot)

Fig. 2. XDS Smart Probe near infrared spectrum analyzer

Fig. 3. Near-infrared spectra of sandstone with different degrees of saturation
(a): Original spectra; (b): First derivative pre-processed spectra
(a): Original spectra; (b): First derivative pre-processed spectra

Fig. 4. Schematic diagram of characteristic variables of near infrared spectrum
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Table 1. Normalized characteristic variable
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Table 2. MIC value caclulated to get the correlation degree between saturation and spectral characteristics
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Table 3. Training results of different number of neurons in hidden layer
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Table 4. Identification results

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