Method for identifying strong flavor Baijiu by combining three-dimensional fluorescence spectrum with PCA-SVM

Abstract

The invention discloses a method for identifying strong flavor Baijiu by combining a three-dimensional fluorescence spectrum with PCA-SVM and belongs to the technical field of Baijiu identification. The method comprises the following steps: measuring the three-dimensional fluorescence spectrum of strong flavor Baijiu of different brands by using a fluorescence spectrophotometer, so as to acquire data of the three-dimensional fluorescence spectrum; and solving second-order deflection of fluorescence intensity on the emission wavelength by virtue of the data of the spectrum, compressing the data by using wavelet transform, performing principal component analysis on the acquired novel data after preprocessing, combining the principal component analysis with a support vector machine, searching the optimal parameters of the support vector machine by using a cross validation method, and establishing a prediction model under the optimal parameters so as to achieve classification and identification of the strong flavor Baijiu of the different brands. The method disclosed by the invention provides help for anti-counterfeiting of Baijiu in the market.

Description

technical field [0001] The invention relates to a method for identifying Luzhou-flavor liquor by using three-dimensional fluorescence spectrum combined with PCA-SVM. The special feature of this method is that the second-order partial guide of fluorescence intensity to emission wavelength is obtained from spectral data and the pretreatment of wavelet transform is carried out. After the method, principal component analysis is performed, combined with a support vector machine to better realize the classification and identification of Luzhou-flavor liquor, which belongs to the technical field of liquor identification. Background technique [0002] Liquor, as one of China's traditional products, has a long history. Luzhou-flavor liquor, as one of the five basic aroma types, has always been in the leading position in the industry in terms of liquor sales in my country. It has been deeply loved by people because of its rich aroma, sweetness and cleanliness. The raw materials used ...

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Problems solved by technology

However, sometimes one spectral line is not enough to express all the fluorescence information, which causes some information loss

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