| 基于小波变换的大米直链淀粉波长选择方法 |
| |
| 引用本文： | 张巧杰,张军.基于小波变换的大米直链淀粉波长选择方法[J].农业机械学报,2010,41(2):138-142. |
| |
| 作者姓名： | 张巧杰 张军 |
| |
| 作者单位： | 1. 北京信息科技大学自动化学院,北京,100192
2. 北京联合大学信息学院,北京,100101 |
| |
| 基金项目： | 北京市优秀人才培养资助项目 |
| |
| 摘 要： | 提出了一种基于小波变换的近红外光谱波长选择方法,小波分解低频系数是原光谱的离散近似,将最佳小波分解低频系数与原光谱数据进行关联,求出小波分解低频系数与原光谱数据的列相关系数R,取与原光谱数据相关系数较大的波长组合,作为最后参与建模的谱区.不仅考虑了浓度矩阵对波长选择的影响,且由于把小波分解结构中的高频系数全部滤除,避免了高频噪声的干扰,减小建模和预测运算时间,使最终建立的近红外光谱模型的预测精度提高.在大米直链淀粉含量的近红外光谱分析中进行了验证,并与其他常用波长选择方法进行了比较,结果表明,该方法波长点数最少,减小为原光谱数据点数的20%,校正模型和预测效果都较理想.
|
| 关 键 词： | 直链淀粉 近红外光谱 小波变换 波长选择 |
Region Selecting Methods of Near Infrared Wavelength Based on Wavelet Transform |
| |
| Zhang Qiaojie and Zhang Jun.Region Selecting Methods of Near Infrared Wavelength Based on Wavelet Transform[J].Transactions of the Chinese Society of Agricultural Machinery,2010,41(2):138-142. |
| |
| Authors: | Zhang Qiaojie and Zhang Jun |
| |
| Institution: | 1.College of Automation/a>;Beijing Information Science & Technology University/a>;Beijing 100192/a>;China2.College of Information/a>;Beijing Union University/a>;Beijing 100101/a>;China |
| |
| Abstract: | An efficient method was presented to select wavelength regions of NIR(near infrared spectroscopy) based on WT(wavelet transform) for building a PLS(partial least squares) calibration model.Wavelet approximation coefficient(WAC) is similar matrix of original NIR.By linking the correlation coefficients of the optimal WAC with original NIR data,a research space with the all combinations of strong correlativity wavelength was selected as final wavelength regions to build a PLS calibration model of NIR.This sele... |
| |
| Keywords: | Amylose NIR Wavelet transform Wavelength selecting |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《农业机械学报》浏览原始摘要信息 |
| 点击此处可从《农业机械学报》下载免费的PDF全文 |
|
