Multi-model method for evaluating similarity of tobacco materials based on tobacco aroma components
A technology of aroma components and similarity, applied in the field of tobacco, can solve problems that are difficult to eliminate, and achieve high prediction accuracy and stability
Active Publication Date: 2017-05-10
CHINA TOBACCO YUNNAN IND
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Problems solved by technology
[0005] Among the above techniques, the calculation and evaluation of the similarity of tobacco leaf samples using principal component analysis and Mahalanobis distance of one-time modeling have the following shortcomings: Due to the differences among the samples in the principal component model, it is difficult to rule out the influence of individual samples with large differences from other samples on the integrity of the principal component analysis model when all samples are modeled at one time
Method used
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Embodiment 1
[0032] The similarity evaluation of 60 tobacco leaf samples obtained from 9 Yunnan tobacco leaves in 2014 and a tobacco leaf to be replaced in the raw material library of a certain brand of cigarettes in the market was used as an example to illustrate.
[0033] (1) Simultaneous distillation and extraction combined with gas chromatography / mass spectrometry (GC / MS) was used to determine the raw materials of 9 tobacco leaves in Yunnan and a certain brand of cigarettes on the market by referring to the article "Cluster Analysis of Cigarette Volatile Components" published by Wang Yu et al. The contents of aroma components in 60 samples of tobacco leaves to be replaced in the warehouse, and the information of aroma components are shown in Table 1.
[0034] Table 1 Information of aroma components in tobacco raw materials
[0035]
[0036] (2) Import the content data of aroma components of 60 tobacco leaf samples measured in step (1) into matlab software to form a basic data matrix...
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The invention relates to a multi-model method for evaluating similarity of tobacco materials based on tobacco aroma components and belongs to the technical field of tobacco. The method comprises: through Monte Carlo sampling without replacement, randomly selecting samples of certain ratio as a training set, and using remaining samples as an intra-model validation set; establishing a plurality of principal component models based on tobacco aroma component content; using the intra-model validation set to validate effectiveness of the models; inputting aroma component data of new tobacco material to the principal component models validated to be effective, calculating mahalanobis distances of the samples in the models, analyzing a generated data group of mahalanobis distances, and evaluating the similarity of the new tobacco material to tobacco material in a material store. Compared with methods to calculate similarity via one-time modeling, the method of the invention enables data information of aroma components of all samples more sufficiently, and also gives better consideration on differential data information of the aroma component contents in the tobacco samples in the material store.
Description
technical field [0001] The invention relates to a method for evaluating the similarity of tobacco leaf raw materials based on multi-models of aroma components of tobacco leaves, belonging to the technical field of tobacco. Specifically, based on the aroma components of a certain brand of cigarettes involved in tobacco leaf raw materials, by constructing a multi-model evaluation system for the similarity of tobacco leaf raw materials, the evaluation of the similarity between new tobacco leaf raw materials and tobacco leaf raw materials in the original warehouse is realized, and for selecting suitable tobacco leaves to enter the raw material warehouse , to maintain the balance of supply and demand in the tobacco raw material library, and to maintain the style characteristics of the same brand of cigarettes to provide auxiliary information. Background technique [0002] Facing the new situation of domestic and foreign tobacco consumption markets, "upping the level of cigarettes...
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CPCG01N30/8696
Inventor 高锐杨威宋鹏飞王毅李文均李艳琼肖敏张光煦马迅
Owner CHINA TOBACCO YUNNAN IND