Spectroscopy and Spectral Analysis, Volume. 40, Issue 10, 3271(2020)
Analysis and Detection Method of NIR Spectral Characteristics of Kidney Bean Canopy Under Saline-Alkali Stress
Figures & Tables(11)
Fig. 1. Kidney bean experiment scene
(a): Hydroponics of kidney bean live; (b): Obtaining spectral curve of kidney bean by near infrared spectrometer
Fig. 2. Distribution of mahalanobis distances of 524 kidney bean samples
Fig. 4. Average spectral absorbance curves of 7 types of kidney bean samples
Fig. 5. Near infrared spectra of kidney bean canopy pretreated by DT
Fig. 7. Extraction of characteristic wavelength by SPA
(a): Number of filter variables; (b): Distribution of characteristic wavelengths
Fig. 8. Contrast of convergence speed of networks
(a): BP neural network; (b): RBF neural network
Table 1. The salt-alkali stress pretreatment model obtained by PLSR and PCR analysis
View tableView in ArticleTable 1. The salt-alkali stress pretreatment model obtained by PLSR and PCR analysis
光谱类型 PLSR建模参数 PCR建模参数 RMSEC Rc RMSEP Rp RMSEC Rc RMSEP Rp 原始光谱(RAW) 0.781 8 0.930 7 0.736 3 0.933 8 1.974 9 0.381 6 1.905 6 0.492 2 平滑光谱(SG) 0.801 7 0.926 9 0.747 5 0.931 7 1.974 9 0.381 6 1.905 6 0.492 2 校正光谱(MSC) 0.758 2 0.934 9 0.694 3 0.941 4 1.955 0 0.403 4 1.853 9 0.543 0 正态光谱(SNV) 0.793 4 0.928 5 0.739 3 0.933 8 1.392 6 0.758 4 1.365 9 0.764 6 标准光谱(STA) 0.796 9 0.927 8 0.958 1 0.882 8 1.526 2 0.699 8 1.603 7 0.637 6 去趋光谱(DT) 0.692 1 0.946 1 0.677 0 0.943 3 2.009 7 0.339 4 1.948 2 0.469 0 均值光谱(MEAN) 0.781 7 0.930 7 0.737 1 0.933 9 1.974 9 0.381 6 1.905 6 0.492 2 归一光谱(NOR) 0.742 7 0.937 6 0.709 5 0.937 4 1.458 7 0.730 7 1.406 0 0.731 1
Table 2. Comparison of three modeling methods
View tableView in ArticleTable 2. Comparison of three modeling methods
模型 特征波
长个数校正集 预测集 RMSEC Rc RMSEP Rp DT-PLSR 1 463 0.692 1 0.946 1 0.677 0 0.943 3 CARS-PLSR 95 0.904 9 0.905 9 1.061 7 0.853 5 SPA-PLSR 17 1.247 9 0.811 7 1.240 8 0.805 1
Table 3. The performance index of salt and alkali stress detection model of kidney bean
View tableView in ArticleTable 3. The performance index of salt and alkali stress detection model of kidney bean
模型 网络结构 学习
次数准确率
/%均方误差 RAW-RBF 1463-335-7 335 88.64 0.009 953 63 DT-RBF 1463-250-7 250 95.45 0.009 992 83 CARS-RBF 95-282-7 282 97.73 0.009 938 59 CARS-BP 95-170-7 60 000 95.45 0.039 300 00
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Lu WANG, Hai-ou GUAN, Wei-kai LI, Zhi-chao ZHANG, Ming ZHENG, Song YU, Yu-long HOU. Analysis and Detection Method of NIR Spectral Characteristics of Kidney Bean Canopy Under Saline-Alkali Stress[J]. Spectroscopy and Spectral Analysis, 2020, 40(10): 3271
Paper Information
Category: Research Articles
Received: Nov. 12, 2019
Accepted: --
Published Online: Jun. 18, 2021
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