Classification of Calculus Bovis and Its Confounding Substances Based on Terahertz Time-Domain Spectroscopy

Long Zhang; Chun Li; Tianying Li; Yan Zhang; Ling Jiang

doi:10.3788/LOP57.233001

Journals >Laser & Optoelectronics Progress >Volume 57 >Issue 23 >Page 233001 > Article

Laser & Optoelectronics Progress
Vol. 57, Issue 23, 233001 (2020)

Classification of Calculus Bovis and Its Confounding Substances Based on Terahertz Time-Domain Spectroscopy

Long Zhang, Chun Li, Tianying Li, Yan Zhang, and Ling Jiang^*

Author Affiliations

College of Information Science and Technology, Nanjing Forestry University, Nanjing, Jiangsu 210037, China

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DOI: 10.3788/LOP57.233001 Cite this Article Set citation alerts

Long Zhang, Chun Li, Tianying Li, Yan Zhang, Ling Jiang. Classification of Calculus Bovis and Its Confounding Substances Based on Terahertz Time-Domain Spectroscopy[J]. Laser & Optoelectronics Progress, 2020, 57(23): 233001 Copy Citation Text

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Fig. 1. Appearances of samples. (a) Coptidis rhizome; (b) Rhubarb; (c) Cattail pollen; (d) Calculus bovis

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Fig. 2. Principle diagram ofTHz-TDS test system

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Fig. 3. Time-domain spectra of six kinds of samples

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Fig. 4. THz absorption spectra of six kinds of samples

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Algorithm	K-CV-SVM	GA-SVM	PSO-SVM	RF
Coptidis rhizome	100	100	100	100
Rhubarb	95	95	100	100
Cattail pollen	90	90	90	90
Artificial Calculus bovis	95	90	90	95
Adulterate Calculus bovis	90	90	90	90
Calculus bovis	95	90	95	95
Total	94.17	92.50	94.17	95.00

Table 1. Identification rate of each model unit:%

Algorithm	K-CV-SVM	GA-SVM	PSO-SVM	RF
Coptidis rhizome	100	95	100	100
Rhubarb	95	95	95	100
Cattail pollen	90	90	95	90
Artificial Calculus bovis	90	90	95	90
Adulterate Calculus bovis	90	85	90	90
Calculus bovis	95	90	90	95
Total	93.33	90.83	94.17	94.17

Table 2. Identification rates of four kinds of models basedon SMOTE unit:%

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