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| 苹果硬度的傅里叶变换近红外光谱无损检测 | |
| 引用本文： | 李桂峰,赵国建,刘兴华,肖春玲.苹果硬度的傅里叶变换近红外光谱无损检测[J].农业机械学报,2009,40(1):120-123. |
| 作者姓名： | 李桂峰 赵国建 刘兴华 肖春玲 |
| 作者单位： | 1. 西北农林科技大学食品科学与工程学院,陕西杨凌,712100;山西师范大学食品科学与工程系,临汾,041000 2. 山西师范大学食品科学与工程系,临汾,041000 3. 西北农林科技大学食品科学与工程学院,陕西杨凌,712100 |
| 摘 要： | 利用傅里叶变换近红外光谱技术探讨快速无损检测苹果硬度方法的可行性.通过解析苹果样品的近红外光谱图,用一阶导数、多元散射校正和矢量归一等方法进行预处理,再用偏最小二乘法建立模型.结果表明,多元散射校正能够有效消除光谱基线平移和偏移现象, 提高原光谱的信噪比,选取有效信息波长范围为1408～2355nm.偏最小二乘法结合多元散射校正所建模型的预测效果最好,模型的决定系数R2为0.9852,内部交叉验证均方根差RMSECV和预测标准偏差RMSEP分别为0.0398kg/cm2和0.0166kg/cm2.进一步通过剔除异常值优化模型,并验证检验组的25个样品,模型的R2为0.9908,RMSEP为0.0147kg/cm2.结果表明:建立的模型可靠,预测效果好,能满足苹果硬度快速检测的要求. |
| 关 键 词： | 苹果 硬度 近红外光谱 傅里叶变换 偏最小二乘法 |
Using FT-NIR Spectra in Non-invasive Measurements of Apple Firmness |
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| Li Guifeng,Zhao Guojian,Liu Xinghua,Xiao Chunling.Using FT-NIR Spectra in Non-invasive Measurements of Apple Firmness[J].Transactions of the Chinese Society of Agricultural Machinery,2009,40(1):120-123. | |
| Authors: | Li Guifeng Zhao Guojian Liu Xinghua Xiao Chunling |
| Institution: | 1.College of Food Science and Engineering;Northwest A&F University;Yangling;Shaanxi 712100;China 2.Department of Food Science and Engineering;Shanxi Normal University;Linfen 041000;China |
| Abstract: | This paper studied the feasibility of using rapid and non-invasive method to measure Fuji apple firmness by FT-NIR spectra techniques.Techniques of spectral analysis and pre-processing including multiplicative scatter correction(MSC),standard normal variate(SNV) and first deviate(FD) were used.The result shows that the MSC technique can effectively remove the base shift and deviation and remove the signal to noise ratio of absorbance spectrum greatly.The best statistical model was developed using partial le... |
| Keywords: | Apple Firmness Near infrared spectra Fourier transform Partial least squares |
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