| 基于连续投影算法的土壤总氮近红外特征波长的选取 |
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| 引用本文： | 高洪智,卢启鹏,丁海泉,彭忠琦.基于连续投影算法的土壤总氮近红外特征波长的选取[J].光谱学与光谱分析,2009,29(11):2951-2954. |
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| 作者姓名： | 高洪智 卢启鹏 丁海泉 彭忠琦 |
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| 作者单位： | 1. 中国科学院长春光学精密机械与物理研究所,吉林,长春,130033;中国科学院研究生院,北京,100049
2. 中国科学院长春光学精密机械与物理研究所,吉林,长春,130033 |
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| 基金项目： | 中国科学院知识创新工程领域前沿项目 |
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| 摘 要： | 讨论了如何利用连续投影算法提取土壤总氮的近红外特征波长.使用连续投影算法对光谱数据进行初步压缩,将优选出的波长按其对总氮贡献值的大小进一步筛选,剔除不敏感的波长,降低模型的复杂度.分析85份土壤样品的近红外光谱,使用连续投影算法得到了总氮的12个波长,贡献值筛选后,波长数量减少到6个,所建模型的预测相关系数(Rp)为0.913,预测均方根误差(RMSEP)为0.011%,模型的预测精度与贡献值筛选前相当,且优于全谱偏最小二乘回归结果.结果表明结合贡献值筛选的连续投影算法能够有效选取待测成分的特征波长,文章所优选的土壤总氮的6个特征波长可以作为小型滤光片式近红外光谱仪波长选择的参考依据.
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| 关 键 词： | 连续投影算法 贡献值筛选 土壤总氮 特征波长 近红外光谱 |
| 收稿时间： | 2008/11/6 |
Choice of Characteristic Near-Infrared Wavelengths for Soil Total Nitrogen Based on Successive Projection Algorithm |
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| GAO Hong-zhi,LU Qi-peng,DING Hai-quan,PENG Zhong-qi. Changchun Institute of Optics,Fine Mechanics , Physics,Chinese Academy of Sciences,Changchun ,China. Graduate University of Chinese Academy of Sciences,Beijing ,China.Choice of Characteristic Near-Infrared Wavelengths for Soil Total Nitrogen Based on Successive Projection Algorithm[J].Spectroscopy and Spectral Analysis,2009,29(11):2951-2954. |
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| Authors: | GAO Hong-zhi LU Qi-peng DING Hai-quan PENG Zhong-qi Changchun Institute of Optics Fine Mechanics Physics Chinese Academy of Sciences Changchun China Graduate University of Chinese Academy of Sciences Beijing China |
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| Institution: | GAO Hong-zhi1,2,LU Qi-peng1,DING Hai-quan1,PENG Zhong-qi11. Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China2. Graduate University of Chinese Academy of Sciences,Beijing 100049,China |
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| Abstract: | The present paper proposed how to select characteristic near-infrared wavelength for soil total nitrogen by using successive projection algorithm (SPA). Spectral data are compressed by SPA in the first place to obtain the raw wavelengths. Then the group of wavelengths derived from SPA is screened by their contributions to the total nitrogen. The insensitive wavelengths for total nitrogen are eliminated,improving the parsimony of the calibration model. For the 85 soil samples in total nitrogen,SPA was used t... |
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| Keywords: | Successive projection algorithm Screening on contribution Soil total nitrogen Characteristic wavelength Near-infrared spectra |
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