Peng-cheng YAN, Song-hang SHANG, Chao-yin ZHANG, Xiao-fei ZHANG. Classification of Coal Mine Water Sources by Improved BP Neural Network Algorithm[J]. Spectroscopy and Spectral Analysis, 2021, 41(7): 2288
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 7, 2288 (2021)
Fig. 1. Flow chart of mine water source prediction and classification model
Fig. 2. Original spectrum
Fig. 3. Original spectrogram and preprocessed image
(a): SG; (b): MSC; (c): Original preprocessed
(a): SG; (b): MSC; (c): Original preprocessed
Fig. 4. Cumulative contribution rate of principal components
Fig. 5. Score distribution
Fig. 6. Comparison between the real value and the predicted value of each prediction model under nine different pretreatment methods
Fig. 7. Absolute error diagram of predicted value and true value of each model
Fig. 8. Fitness curves
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Table 1. Training error of neuron number in different hidden layers
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Table 2. Comparison of evaluation indexes of each prediction model under different pretreatment methods
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