Spectroscopy and Spectral Analysis, Volume. 40, Issue 11, 3451(2020)
Wavelength Selection of Near-Infrared Spectra Based on Improved SiPLS-Random Frog Algorithm
Figures & Tables(8)
Fig. 1. Original and pre-processed spectra
(a): Original; (b): S-G first derivative
Fig. 3. The result of Si-RF
(a): Selection probability of each variable;(b): RMSEV values of each model
Fig. 4. Correlation between measured and predicted values of SOM obtained from different models
(a): Full spectrum PLS; (b): RF-MLR; (c): Si-RF-MLR
Table 1. Statistical data of soil organic matter content
View tableView in ArticleTable 1. Statistical data of soil organic matter content
样本类型 样本数 最小值 最大值 均值 标准差 变异
系数/%总体样本 108 42.91 95.85 85.43 10.82 12.7 建模集 81 42.91 95.85 83.73 11.79 14.0 预测集 27 74.99 93.46 90.52 4.30 4.8
Table 2. Sub-interval optimization results of SiPLS
View tableView in ArticleTable 2. Sub-interval optimization results of SiPLS
区间总数 组合数 所选区间 RMSECV 20 2 [10 18] 1.678 3 [10 15 19] 1.595 25 2 [12 23] 1.787 3 [12 19 24] 1.575 30 2 [15 28] 1.556 3 [12 15 28] 1.466 35 2 [15 17] 1.703 3 [17 18 32] 1.583
Table 3. Optimal results of different iteration times
View tableView in ArticleTable 3. Optimal results of different iteration times
迭代次数 变量数 RMSEVmin 500 13 0.988 4 1 000 17 0.818 4 1 500 24 0.876 5 2 000 17 0.981 9
Table 4. Results of model with different wavelength selection methods
View tableView in ArticleTable 4. Results of model with different wavelength selection methods
模型 变量数 Rc RMSEC Rp RMSEP FULL-PLS 1 050 0.963 3 3.143 1 0.909 3 1.954 3 RF-MLR 10 0.982 7 2.172 0 0.935 4 1.627 6 Si-RF-MLR 17 0.993 6 1.327 0 0.984 8 0.818 4
Tools
Get Citation
Copy Citation Text
Jie-hong CHENG, Zheng-guang CHEN. Wavelength Selection of Near-Infrared Spectra Based on Improved SiPLS-Random Frog Algorithm[J]. Spectroscopy and Spectral Analysis, 2020, 40(11): 3451
Paper Information
Category: Research Articles
Received: Oct. 15, 2019
Accepted: --
Published Online: Jun. 18, 2021
The Author Email: Jie-hong CHENG (1024212535@qq.com)
© Copyright 2018-2021 | Chinese Laser Press.
All Rights Reserved 沪ICP备15018463号-20