基于可见-近红外光谱的可乐品牌鉴别方法研究

提出了一种采用可见-近红外光谱分析技术快速鉴别可乐品牌的新方法.采用美国ASD公司的便携式光谱仪对三种不同品牌的可乐进行光谱分析,各获取55个样本数据.将样本随机分成150个建模样本和15个预测样本,采用平均平滑法和标准归一化方法对样本数据进行预处理,再用主成分分析法对光谱数据进行聚类分析并获得各主成分数据.将建模样本的主成分数据作为BP网络的输入变量,可乐品牌作为输出变量,建立三层人工神经网络鉴别模型,并用模型对15个预测样本进行预测.结果表明,预测准确率为100%,实现了可乐品牌快速、准确的鉴别.

Discrimination of Varieties of Cola Using Visual-Near Infrared Spectra

A new method was developed to fast discriminate the brands of cola by means of visual-near infrared spectroscopy(NIRS).Three different brands of cola(Cocacola,Pepsi-cola and Future-cola) were analyzed using a handheld near infrared spectrometer produced by ASD Company.Fifty five samples were used for each brand of cola,and they were divided randomly into a group of 150 samples as calibrated samples and one of 15 samples as prediction samples.The samples data were pretreated using average smoothing and standard normal variable method,and then the pretreated spectra data were analyzed using principal component analysis(PCA).The principal component data of calibrated samples were used as the inputs of back-propagation artificial neural network(ANN-BP),while the values of cola brands used as the outputs of ANN-BP,and then the three layers ANN-BP discrimination model was built.The 15 unknown prediction samples were analyzed by the ANN-BP model.The result showed that the distinguishing rate was 100%;it was realized to discriminate different brands of Cola rapidly and exactly.