Huidi Xu, Lulu Lin, Zheng Li, Meizhen Huang, Zhengyu Zhou. Nephrite Origin Identification Based on Raman Spectroscopy and Pattern Recognition Algorithms[J]. Acta Optica Sinica, 2019, 39(3): 0330001
- Acta Optica Sinica
- Vol. 39, Issue 3, 0330001 (2019)
Fig. 1. Pictures of nephrite samples from different origins. (a) Gansu nephrite; (b) Qinghai nephrite; (c) Xinjiang nephrite
Fig. 2. Raman spectra of nephrite samples. (a) Original spectra; (b) pretreated spectrum
Fig. 3. Raman spectra of nephrites from three origins
Fig. 4. Relationship between decision tree number and error rate
Fig. 5. Verification results of random forest model
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Table 1. Major Raman peaks and attribution of corresponding vibrational bands
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Table 2. Verification results of Mahalanobis distance model
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