| 应用有效波长进行奶茶品种鉴别的研究 |
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| 引用本文： | 刘飞,王莉,何勇.应用有效波长进行奶茶品种鉴别的研究[J].浙江大学学报(自然科学版 ),2010,44(3):619-624. |
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| 作者姓名： | 刘飞 王莉 何勇 |
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| 作者单位： | 浙江大学生物系统工程与食品科学学院; |
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| 基金项目： | 国家自然科学基金资助项目(30671213); 教育部高等学校优秀青年教师教学科研奖励计划资助项目(02411); 浙江省自然科学基金资助项目(Y307158); 中央高校基本科研业务费专项资金资助项目 |
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| 摘 要： | 基于最小二乘支持向量机建模方法,提出应用奶茶在可见/近红外光谱谱区的有效波长进行其品种鉴别的新方法.用225个样本建模,75个样本进行预测.通过对光谱数据进行偏最小二乘法分析,根据载荷图和回归系数图选择鉴别奶茶品种的有效波长（EW）,并建立EW与最小二乘支持向量机（LS SVM）相结合的EW LS SVM模型,同时与应用主成分（PC）和小波变换（WT）建立的PC LS SVM和WT LS SVM模型进行判别准确率的比较.结果表明,应用EW、PC和WT建立的模型对建模样本的判别准确率均为100%,对预测集样本判别准确率分别为98.7%、98.7%和100%,获得了理想的鉴别效果.研究表明，应用可见/近红外光谱谱区的有效波长进行奶茶品种鉴别是可行的,且EW LS SVM模型能获得满意的鉴别精度.
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| 关 键 词： | 可见/近红外光谱 奶茶 品种鉴别 有效波长 最小二乘支持向量机 |
Application of effective wavelengths for variety identification
of instant milk teas |
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| LIU Fei,WANG Li,HE Yong.Application of effective wavelengths for variety identification
of instant milk teas[J].Journal of Zhejiang University(Engineering Science),2010,44(3):619-624. |
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| Authors: | LIU Fei WANG Li HE Yong |
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| Affiliation: | College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310029, China |
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| Abstract: | Based on least squares-support vector machine (LS-SVM),the effective wavelength (EW) in visible/near infrared (Vis/NIR) region was proposed as a new approach for the variety discrimination of instant milk teas. This method uses 225 milk tea samples for the calibration set,while 75 samples for the validation set. After partial least squares (PLS) analysis,the EWs were selected according to the X-loading weights and regression coefficients,and an EW-LS-SVM model was developed for the variety discrimination. T... |
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| Keywords: | visible/near infrared spectroscopy instant milk tea variety discrimination effective wavelength least squares-support vector machine |
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