Discrimination of LongJing green-tea grade by electr

北京盈盛恒泰科技有限责任公司是一家专业从事食品分析检测仪器和环境应急检测仪器的销售技术支持和售后服务工作公司目前是日本INSENT日本JWP意大利VELP美国FTC德国AIRSENSE德国OWR美国UNITY美国Navas美国FiltationEngineering等世界仪器制造商的ZG区营销合作伙伴和技术服务ZX，产品覆盖食品感官分析食品营养分析食品安全检测及环境应急监测等公司在香港北京上海广州成都海口银川等地设有分公司和办事机 Aninvestigationwasmadetoevaluatethecapacityofanelectronicnose(E-nose,PEN2)toclassifytheteaqualitygrade.Fourteagroups(A120,A280,A380andA600)withadifferentqualitygradewereemployed.Intheexperiment,thevolumeofvialandtheheadspacegeneratedtimewereconsideredcorrespondingtothe5gteasamples,andtheoptimumexperimentalprocedurewasdeterminedbyusingthevarianceanalysisANOVA),multivarianceanalysisandprinciplecomponentsanalysis(PCA).Theresultsshowedthatthevolumeofvialaffectedtheresultofdiscrimination,andtheheadspacegeneratedtimehadnosigni?canteffectontheE-noseresponse.ThefourteagroupsweremeasuredandresponsevaluesatfourdifferentcollectiontimeswereconductedbyPCA,lineardiscriminationanalysis(LDA)andarti?cialneuralnetwork(ANN).OnlyA120,A380andA600couldbediscriminatedbyPCA.However,thefourteagroupswerediscriminatedcompletelybyLDA.TheresponsevalueoftheE-noseat60swasoptimumtobeusedfordiscrimination.ThemethodofANN(networktopology20-12-4)wasperformedand90%oftheotalteasampleswereclassi?edcorrectlybyusingtheback-propagationneuralnetwork.?2006ElsevierB.V.Allrightsreserved. 电子鼻-Z传感器生产商产品