激光与光电子学进展, 2021, 58 (3): 0330001, 网络出版: 2021-03-12 复制并引用该论文  被引通知

图 & 表

图 1. THz-TDS系统示意图

Fig. 1. Schematic of THz-TDS system

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图 2. 5种牧草沙打旺样品的太赫兹时域、频域光谱图。(a)时域光谱图；(b)频域光谱图

Fig. 2. Terahertz time and frequency domain spectral waveforms of five Astragalus adsurgens Pall. seeds. (a) Terahertz time domain spectral waveforms; (b) terahertz frequency domain spectral waveforms

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图 3. 5种牧草沙打旺样品的吸收系数图谱

Fig. 3. Absorption coefficient spectra of five Astragalus adsurgens Pall. seeds

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图 4. 5种牧草沙打旺样品的平均吸收系数和标准差

Fig. 4. Average absorption coefficient and standard deviation of five Astragalus adsurgens Pall. seeds

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图 5. 5种牧草沙打旺样品的折射率谱图

Fig. 5. Refractive index spectra of five Astragalus adsurgens Pall. seeds

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表 15种牧草沙打旺种子的相关信息

Table1. Relevant information of five samples of Astragalus adsurgens Pall. seeds

Number Name Place of origin Year Sample 1 Sha Da Wang 1 Helin 2010 Sample 2 Sha Da Wang 2 Helin 2012 Sample 3 Sha Da Wang 3 Helin Before 2010 Sample 4 Sha Da Wang 4 Helin 2016 Sample 5 Sha Da Wang 5 Helin 2016

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表 2随机森林模型的分类结果

Table2. Classification results of RF model

No. Classification accuracy of all kinds of samples/% Classification accuracy of five samples/% Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Average classification accuracy/% 81.60 85.00 86.10 81.90 90.90 85.00 1 75 100 86 67 86 83.30 2 80 89 86 80 100 86.70 3 91 60 100 86 67 83.30 4 60 100 100 67 86 83.30 5 80 67 67 100 100 83.30 6 75 100 89 80 100 86.70 7 100 63 100 100 80 86.70 8 80 100 78 71 100 83.30 9 75 85 75 88 100 86.70 10 100 83 80 80 90 86.70

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表 3主成分特征向量

Table3. Eigenvector of principle component

Component Eigenvector Eigenvalue Variance contribution rate/% Cumulative variance contribution rate/% 1 84.29 95.79 95.79 2 3.214 3.650 99.44 3 0.2125 0.2400 99.68

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表 4PCA-RF 模型的分类结果

Table4. Classification results of PCA-RF model

No. Classification accuracy of all kinds of samples/% Classification accuracy of five samples/% Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Average classification accuracy/% 94.20 92.10 88.30 97.00 91.40 91.20 1 80 100 100 90 100 93.30 2 100 83 89 80 100 90.00 3 100 83 75 100 100 93.30 4 100 80 83 100 75 90.00 5 100 100 80 100 71 90.00 6 86 100 83 100 100 93.30 7 86 75 100 100 100 90.00 8 90 100 100 100 100 96.70 9 100 100 87 100 88 90.00 10 100 100 86 100 80 93.30

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王芳, 张春红, 赵景峰, 哈斯巴特尔, 张玉. 基于混合机器学习法的太赫兹波鉴别草种的研究[J]. 激光与光电子学进展, 2021, 58(3): 0330001. Wang Fang, Zhang Chunhong, Zhao Jingfeng, Ha Sibateer, Zhang Yu. Identification of a Grass Species Using a Terahertz Wave Based on Hybrid Machine Learning Method[J]. Laser & Optoelectronics Progress, 2021, 58(3): 0330001.