简介:棉花纤维素动态地处于亚andsupercritical状态与乙醇被提取。变换的度是95.4%,当棉花纤维素non-isothermally从20与乙醇被提取时,摘录收益是55.2%吗??
简介:处理技术的计算机图象被用来在木头表面上完成缺点图象的特征抽取。由缺点的灰色的价值的计算。有用鉴别缺点被完成了的三个特征数据。实验显示那这样对木头表面上的缺点的自动化识别有效。
简介:Takingextractionrateasanindicator,theextractiontechnologyofChinese-firheartwoodbysupercriticalcarbondioxidetreatmentwasstudied,andtheextractionrateoftheSFE-CO2methodwascomparedtothatoftraditionalextractionmethod.Theresultsshowthatwhenextractionprocessingconditionwere:extractionpressure30MPa,extractiontemperature40℃,extractiontime120m,andflowvelocity20kg/h,theextractionrateofSFE-CO2was0.99%,0.20%morethanthatofthetraditionalextractionmethod.However,takingthecostintoconsideration,itisproposedthatthetraditionalextractionisusedunlesstherearespecificrequirements.
简介:Thisstudywasonsuperiorityofthenon-negativematrixfactorization(NMF)algorithmforapplicationofinformationextractedwithaerialimages.First,NMFwasusedforaerialimageinformationextraction,andthenthisdatawascomparedwithaprincipalcomponentanalysis(PCA)inwhichr(thenumberofrowsorcolumnsofbasicmatrix)andEignum(thenumberofeigenvalues)weregivendifferentvalues.ExperimentalresultsshowedthattheruntimeofNMFwithr=20or50waslessthanthatofPCAwithanEignum=20or50.Also,therecognitionrateofNMFwithr=50washigherthanthatofanEignum=50.Theexperimentshowedthatnonnegativematrixfactorizationhadadvantagesofashorttimeperiodwithahighrecognitionrate.
简介:Background:IntheGermanDemocraticRepublic(GDR),resintappinginScotspine(PinussylvestrisL.)forestswasamajoreconomicactivity,andresin-tappedstandsarefrequentlyfoundupuntilthisday.Inthisstudy,weinvestigatehowthemechanicaldamagecausedbyresintappingaffectsthegrowthandclimatesensitivityofScotspineusingadendroecologicalapproach.Methods:Tree-ringsampleswerecollectedfromresin-tappedandnon-tappedtreesintwoforestareasinnortheasternGermany,andtree-growthpatternswereanalyzed.Forelucidatingeffectsofresintappingontheclimatesensitivityofpinegrowth,climate-growthrelationshipsandpointeryearswerestudied.Results:Weobservedthatresintappingpositivelyaffectstreegrowthatbreastheight,likelyaswoodformationisconcentratedonthelivingpartofthebole(i.e.aftertappingthereisnogrowthtakingplaceonthetappingfaceduetothemechanicaldamagedonetothecambium).Weobservednodifferencesintheclimatesensitivityoftappedandnon-tappedtrees,norintheoccurrenceofextremegrowthresponses.Conclusion:Ourresultshighlightthatresinextractionis,apartfrominflictingmechanicaldamage,notalteringthesensitivityofScotspinegrowthtoclimaticconditions.