| 光谱学与光谱分析 |
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| Year Discrimination of Mild Aroma Chinese Liquors Using Three-Dimensional Fluorescence Spectroscopy Combined with Parallel Factor and Neural Network |
| ZHU Zhuo-wei1, 2, QUE Li-zhi1, CHEN Guo-qing1*, XU Rui-yu1, ZHU Tuo3 |
1. School of Science，Jiangnan University，Wuxi 214122，China
2. School of Internet of Things Engineering，Jiangnan University，Wuxi 214122，China
3. College of Energy and Electrical Engineering，Hohai University，Nanjing 210098, China |
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Abstract Three-dimensional fluorescence spectroscopy coupled with parallel factor analysis and neural network was applied to the year discrimination of mild aroma Chinese liquors. The excitation-emission fluorescence matrices (EEMs) of 120 samples with various years were measured by FLS920 fluorescence spectrometer. The trilinear decomposition of the data array was performed and the loading scores of and the excitation-emission profiles of four components were also obtained. The scores were employed as the inputs of the BP neural networks and the PARAFAC-BP identification model was constructed. 10 samples were collected from 10, 20 and 30 years of liquors respectively, and 30 samples were selected as the test sets. The remaining 90 samples were used as the training sets to build the training model. The year prediction of unknown samples was also carried out, and the prediction accuracy was 90%, 100% and 100%, respectively. Meanwhile, the discrimination analysis method and the multi-way partial least squares discriminant analysis were compared, namely PARAFAC-BP and NPLS-DA. The results indicated that parallel factor combined with the neural network (PARAFAC-BP) has higher prediction accuracy. The proposed method can effectively extract the spectral characteristics, and also reduce the dimension of the input variables of neural network. A good year discrimination result was finally achieved.
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Received: 2014-06-20
Accepted: 2014-10-08
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Corresponding Authors:
CHEN Guo-qing
E-mail: cgq2098@163.com
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