Variance ratio-based extraction method for features of intelligent olfaction spectrum used for characterization of variation of honey

Abstract

The invention provides a variance ratio-based extraction method for features of an intelligent olfaction spectrum used for characterization of variation of honey. According to the method, 5 different honey sources are selected as research samples, i.e., 1) honey of rape flowers harvested in Fuling District and Yongchuan District, Chongqing in western China, 2) honey of lychee flowers harvested in Nanning, Guangxi in south China, 3) chaste honey harvested in Miyun, Beijing, etc. in north China, 4) acacia honey harvested in Laiyang, Shandong in eastern China and 5) basswood honey harvested in Dunhua, Jilin and Harbin, Heilongjiang in northeast China. The method is characterized in that a gas sensor array employs an Fox4000 electronic nose which is composed of 18 metal-oxide semiconductor gas sensors and an HS100 headspace autosampler, a ratio of interspecific variance to intraspecific variance of a sample at each signal location of each sensor is calculated, and selection of signal locations is carried out based on the values of the variance ratios. According to the invention, the method realizes selection of signal locations through selection of the variance ratios, i.e., directly through comparison of the variance ratios of interspecific variance to intraspecific variance at every signal location, without any other pattern discrimination.

Description

technical field [0001] The present application relates to a feature extraction method of intelligent olfactory atlas for characterizing honey difference based on variance ratio. Background technique [0002] my country's honey production ranks first in the world. In recent years, the output has maintained a rapid growth trend, from 252,000 tons in 2001 to 402,000 tons in 2009, accounting for more than 30% of the world's total output from nearly 20%. However, due to the drive of economic interests, the current honey market is seriously adulterated, resulting in adulterated honey accounting for 20% to 30% of the honey market. In some areas, adulterated and fake bee products account for about 50%, seriously damaging the interests of consumers and affecting The healthy development of the honey industry and the fight against foreign exchange earnings from export trade. [0003] Due to the lack of detection methods, it is difficult to crack down on adulteration. The fundamental r...

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