Yiheng Guo, Fang Yan, Miaoyu Zhao, Xuan Zhuo. Quantitative Analysis of Melamine Based on Terahertz Spectroscopy[J]. Acta Optica Sinica, 2023, 43(19): 1930001
- Acta Optica Sinica
- Vol. 43, Issue 19, 1930001 (2023)
Fig. 1. Absorption spectra data. (a) Pure milk powder absorption spectra; (b) absorption spectra of pure milk powder, pure melamine and mixtures containing 10% melamine
Fig. 2. Gradient absorption spectra of melamine concentration in milk powder
Fig. 3. Prediction results of four regression models. (a) PCR; (b) SVR; (c) PLSR; (d) LSSVR
Fig. 4. Prediction results of LSSVR model optimized by four algorithms. (a) GA-LSSVR; (b) PSO-LSSVR; (c) CS-LSSVR; (d) GWO-LSSVR
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Table 1. Sample preparation ratio information
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