Shu-guang MIAO, Dan SHAO, Zhong-yu LIU, Qiang FAN, Su-wen LI, En-jie DING. Study on Coal-Rock Identification Method Based on Terahertz Time-Domain Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2022, 42(6): 1755
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- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 6, 1755 (2022)
Fig. 1. The basic structure of terahertz time domain spectroscopy system
Fig. 2. Time-domain spectra (a) and power spectra (b) of six samples
Fig. 3. Refractive index (a), absorption coefficient (b) and dielectric constant (c) of six samples
Fig. 4. Euclidean distance dendrogram (a) and PC1 score histogram (b) with the input of refractive index
Fig. 5. Euclidean distance dendrogram (a) and PC1 score histogram (b) with the input of absorption coefficient
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Table 1. Code of six coal-rock standard materials and corresponding property parameters
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