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Discrimination of storage shelf-life for mandarin
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2018-08-16 10:00 3997阅读次数
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overthepastyears,electronicnosetechnologyopenedthepossibilitytoexploitinformationonaromaattributetoassessfruitripeninstageduringstorage.theob-jectiveinthisstudywastoevaluatethecapacityofelectronicnoseinmonitoringthechangeinvolatiproductionofmandarinduringdifferentstoragetreatments,andstorageshelf-lifeofmandarinwasevaluatedbymeasuringthechangeivolatileproductionofmandarinusingelectronicnosedevicepen2.bycomparing,storageshelf-lifeofmandarinwasbettdistinguishedusinglineardiscriminantanalysisldathanprincipalcomponentanalysispca.pcaandldaanalysiswerefcienttoclassifymandarinwiththesamestoragetimeinitsrespectivegroups;butthemethodsarenotefcienttoseparatethmandarinsbydifferentstoragetimes.thecorrelationbetweenthemeasuredandpredictedvaluesoffruitqualityattributesuchasolublesolidcontent,acidityandcompressionforceshowspoortoreasonablepredictionperformancebymeansofelectronicnossignals.theresultsprovethatsensors2,7and9intheelectronicnosepen2formandarinhaveahigherinuenceinthecurrentpatterle.hence,nearlyasubsetoffewsensorscanbechosentoexplainallthevariance.thisresultcouldbeusedinfurtherstudiestooptimizthenumberofsensorsandndbetterperformance.
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Discrimination of storage shelf-life for mandarin by- Discrimination of storage shelf-life for mandarin by[详细]
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2008-05-29 00:00
产品样册
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- Discrimination of storage shelf-life for mandarin
- overthepastyears,electronicnosetechnologyopenedthepossibilitytoexploitinformationonaromaattributetoassessfruitripeninstageduringstorage.theob-jectiveinthisstudywastoevaluatethecapacityofelectronicnoseinmonitoringthechangeinvolatiproductionofmandarinduringdifferentstoragetreatments,andstorageshelf-lifeofmandarinwasevaluatedbymeasuringthechangeivolatileproductionofmandarinusingelectronicnosedevicepen2.bycomparing,storageshelf-lifeofmandarinwasbettdistinguishedusinglineardiscriminantanalysisldathanprincipalcomponentanalysispca.pcaandldaanalysiswerefcienttoclassifymandarinwiththesamestoragetimeinitsrespectivegroups;butthemethodsarenotefcienttoseparatethmandarinsbydifferentstoragetimes.thecorrelationbetweenthemeasuredandpredictedvaluesoffruitqualityattributesuchasolublesolidcontent,acidityandcompressionforceshowspoortoreasonablepredictionperformancebymeansofelectronicnossignals.theresultsprovethatsensors2,7and9intheelectronicnosepen2formandarinhaveahigherinuenceinthecurrentpatterle.hence,nearlyasubsetoffewsensorscanbechosentoexplainallthevariance.thisresultcouldbeusedinfurtherstudiestooptimizthenumberofsensorsandndbetterperformance.[详细]
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- AninvestigationwasmadetoevaluatethecapacityofanelectronicnoseE-nose,PEN2toclassifytheteaqualitygrade.FourteagroupsA120,A280,A380andA600withadifferentqualitygradewereemployed.Intheexperiment,thevolumeofvialandtheheadspacegeneratedtimewereconsideredcorrespondingtothe5gteasamples,andtheoptimumexperimentalprocedurewasdeterminedbyusingthevarianceanalysisANOVA,multivarianceanalysisandprinciplecomponentsanalysisPCA.Theresultsshowedthatthevolumeofvialaffectedtheresultofdiscrimination,andtheheadspacegeneratedtimehadnosigni?canteffectontheE-noseresponse.ThefourteagroupsweremeasuredandresponsevaluesatfourdifferentcollectiontimeswereconductedbyPCA,lineardiscriminationanalysisLDAandarti?cialneuralnetworkANN.OnlyA120,A380andA600couldbediscriminatedbyPCA.However,thefourteagroupswerediscriminatedcompletelybyLDA.TheresponsevalueoftheE-noseat60swasoptimumtobeusedfordiscrimination.ThemethodofANNnetworktopology20-12-4wasperformedand90%oftheotalteasampleswereclassi?edcorrectlybyusingtheback-propagationneuralnetwork.?2006ElsevierB.V.Allrightsreserved.[详细]
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