Aolin Zhang, Jifen Wang, Song Liu, Xuejun Shi, Xiaojie Xu, Di Zhou, Zhen Zhang. Comparison of Spectral Pattern-Recognition Methods for Slimming Drugs in Express Delivery Channels[J]. Laser & Optoelectronics Progress, 2023, 60(4): 0430002
- Laser & Optoelectronics Progress
- Vol. 60, Issue 4, 0430002 (2023)
Fig. 1. Cumulative variance contribution rate of principal component
Fig. 2. Infrared spectrograms of 145 samples
Fig. 3. Spatial distribution of Fisher discriminant samples
Fig. 4. Classification accuracy of samples under KNN model
Fig. 5. Classification accuracy of SVM model
Fig. 6. A, B infrared spectrum. (a) A sample; (b) B sample
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Table 1. Experimental equipment and parameters
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Table 2. Summary of discriminant functions of 5 groups of drug samples
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Table 3. Accuracy of drug classification in 5 groups
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Table 4. Classification accuracy of samples under KNN model units: %
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Table 5. Number of 8 brands of Zolpidem
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Table 6. Classification accuracy of 8 brands of Zolpidem
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