Attenuated Total Reflection Fourier Transform Infrared Spectral Identification of Bioaerosol Based on 1D-CNN

Yang Wang; Jingjing Tong; Xiangxian Li; Xin Han; Yusheng Qin; Renjie Fang; Minguang Gao

doi:10.3788/AOS231963

Acta Optica Sinica, Volume. 44, Issue 24, 2430003(2024)

Attenuated Total Reflection Fourier Transform Infrared Spectral Identification of Bioaerosol Based on 1D-CNN

Yang Wang^1,2, Jingjing Tong^2、*, Xiangxian Li², Xin Han², Yusheng Qin^1,2, Renjie Fang^1,2, and Minguang Gao²

Author Affiliations

¹University of Science and Technology of China, Hefei 230026, Anhui , China

²Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui , China

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Figures & Tables(7)

Fig. 1. ATR-FTIR absorption spectra of different biological samples. (a) Lactobacillus; (b) Escherichia coli; (c) Rhizopus oryzae; (d) Trichoderma harzianum; (e) Actinomycete; (f) Aspergillus

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Fig. 2. Model network structure

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Fig. 3. Absorbance of each biological sample after pretreatment. (a) Lactobacillus; (b) Escherichia coli; (c) Rhizopus oryzae; (d) Trichoderma harzianum; (e) Actinomycete; (f) Aspergillus

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Fig. 4. (a) Loss and (b) accuracy curves for the model’s training and test sets

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Fig. 5. Confusion matrix

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Table 1. Sample codes and quantity divisions of different bioaerosols

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Table 1. Sample codes and quantity divisions of different bioaerosols

Name	Training set	Validation set	Test set	Size	Encoding label
Lactobacillus	480	320	320	1×1762	[0, 0, 0, 0, 0, 1]
Escherichia coli	480	320	320	1×1762	[0, 0, 0, 0, 1, 0]
Rhizopus oryzae	480	320	320	1×1762	[0, 0, 0, 1, 0, 0]
Trichoderma harzianum	480	320	320	1×1762	[0, 0, 1, 0, 0, 0]
Actinomycetes	480	320	320	1×1762	[0, 1, 0, 0, 0, 0]
Aspergillus	480	320	320	1×1762	[1, 0, 0, 0, 0, 0]

Table 2. Comparison of model accuracy
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Table 2. Comparison of model accuracy
Model Pure sample accuracy /% 10-fold cross-validation accuracy /% Low concentration Aspergillus test set accuracy /%
1D-CNN 100.0 100.0 100.0
SVM 95.0 90.0 84.5

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Yang Wang, Jingjing Tong, Xiangxian Li, Xin Han, Yusheng Qin, Renjie Fang, Minguang Gao. Attenuated Total Reflection Fourier Transform Infrared Spectral Identification of Bioaerosol Based on 1D-CNN[J]. Acta Optica Sinica, 2024, 44(24): 2430003

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