| 基于逐步回归法的近红外光谱信息提取及模型的研究 |
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| 引用本文： | 郑咏梅,张军,陈星旦,申铉国,张铁强. 基于逐步回归法的近红外光谱信息提取及模型的研究[J]. 光谱学与光谱分析, 2004, 24(6): 675-678 |
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| 作者姓名： | 郑咏梅 张军 陈星旦 申铉国 张铁强 |
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| 作者单位： | 吉林大学物理学院,物理教学研究中心,吉林,长春,130025;中国科学院长春光学精密机械与物理研究所,吉林,长春,130022 |
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| 基金项目： | 国家"十五"攻关项目(2001BA512B04(01))资助 |
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| 摘 要： | 基于多元线性回归的逐步分析算法 ,依据小麦粉的近红外吸收特性机理 ,对小麦粉的近红外光谱(10 0 0～ 2 5 0 0nm)划分三波段 (Ⅰ :10 0 0～ 14 0 0nm ;Ⅱ :14 0 0～ 186 0nm ;Ⅲ :186 0～ 2 5 0 0nm) ,并进行了各波段的光谱信息提取 ,确定了回归特征波长 ,对不同波段建立的回归模型进行了比较 ,给出了各段回归的最佳数学模型。通过对小麦粉近红外谱的信息提取及蛋白质成分的定量分析 ,比较和讨论了不同波段所建模型对小麦粉蛋白质含量的近红外分析结果 ,在应用中有一定的参考价值。
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| 关 键 词： | 近红外光谱 逐步回归 小麦粉 蛋白质含量 |
| 文章编号： | 1000-0593(2004)06-0675-04 |
| 修稿时间： | 2002-08-08 |
Research on Model and Wavelength Selection of Near Infrared Spectral Information |
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| Yong-mei Zheng,Jun Zhang,Xing-dan Chen,Xuan-guo Shen,Tie-qiang Zhang. Research on Model and Wavelength Selection of Near Infrared Spectral Information[J]. Spectroscopy and Spectral Analysis, 2004, 24(6): 675-678 |
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| Authors: | Yong-mei Zheng Jun Zhang Xing-dan Chen Xuan-guo Shen Tie-qiang Zhang |
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| Affiliation: | Physics College, Jilin University, Changchun 130025, China. |
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| Abstract: | Based on stepwise linear regression, and according to the theory of near infrared absorbption, spectrum (1000-2500 nm) obtained by detector was divided into three ranges, which were I (1000-1400 nm) and II (1400-1860 nm) and III (1860-2500 nm). In each range the regression wavelengths of different wavelength gaps were picked up stepwise. Regression coefficients and parameters were calculated by Matlab5.3 Program. Regression models were built up in different ranges with different wavelength gaps. Best models could be determined. Prediction results of protein content of ground wheat were displayed in scatter plots. Different results were discussed and compared, which has referencemeaning for application. |
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| Keywords: | Near infrared spectra Stepwise Ground wheat Protein content |
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