Comparison of chemometric methods for brand classification of cigarettes by near-infrared spectroscopy |
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| Authors: | Chao Tan Xin Qin Menglong Li |
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| Affiliation: | aDepartment of Chemistry and Chemical Engineering, Yibin University, Yibin, Sichuan 644007, PR China;bKey Laboratory of Computational Physics, Yibin University, Yibin, Sichuan, 644007, PR China;cChina Tobacco Chuanyu Industrial Corporation, Chengdu, Sichuan 610017, PR China;dCollege of Chemistry, Sichuan University, Chengdu, Sichuan 610064, PR China |
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| Abstract: | The combinations of NIR spectroscopy and three classification algorithms, i.e., multi-class support vector machine (BSVM), k-nearest neighbor (KNN) and soft independent modeling of class analogies (SIMCA), for discriminating different brands of cigarettes, were explored. The influence of the training set size on the relative performance of each algorithm was also investigated. A NIR spectral dataset involving the classification of cigarettes of three brands was used for illustration. Three performance criteria based on “correctly classified rate (CCR)”, i.e., “Average CCR”, “95 percentile of CCR” and “S.D. of CCR”, were defined to compare different algorithms. It was revealed that BSVM is significantly better than KNN or SIMCA in the statistical sense, especially in cases where the training set is relatively small. The results suggest that NIR spectroscopy together with BSVM could be an alternative to traditional methods for discriminating different brands of cigarettes. |
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| Keywords: | Near-infrared spectroscopy Classification Cigarette Support vector machine |
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