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

A technology of PCA-SVM and Luzhou-flavor liquor, applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problem of information loss and other problems, and achieve the effect of simple operation, less sample consumption and high detection sensitivity

Active Publication Date: 2015-04-08
JIANGNAN UNIV
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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

Method used

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

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Experimental program
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Embodiment example

[0026] Implementation case: classification and identification of 7 different brands of Luzhou-flavor liquor.

[0027] (1) Use the fluorescence spectrometer FLS920 to measure the three-dimensional fluorescence spectra of 7 different brands of Luzhou-flavor liquor:

[0028] a. Sample preparation: collect 7 different brands of Luzhou-flavor liquor, prepare 20 samples for each brand of liquor, a total of 140 samples.

[0029] b. Scanning conditions: xenon light source 80w; detection temperature -20 degrees; excitation wavelength range: 200-600nm, step size 5nm; emission wavelength range: 200-800nm, step size 1nm;

[0030] (2) Preprocessing the obtained spectral data:

[0031] a. Measure the three-dimensional fluorescence spectra of 140 samples respectively, each sample obtains a 81×586 spectral matrix, and removes Rayleigh scattering and Raman scattering;

[0032] b. Establish a three-dimensional fluorescence spectrum library of 7 different brands of Luzhou-flavor liquor, such a...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 陈国庆朱焯炜吴亚敏朱纯朱拓徐瑞煜
Owner JIANGNAN UNIV
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