简介:Tomakeuseofthepriorknowledgeoftheimagemoreeffectivelyandrestoremoredetailsoftheedgesandstructures,anovelsparsecodingobjectivefunctionisproposedbyapplyingtheprincipleofthenon-localsimilarityandmanifoldlearningonthebasisofsuper-resolutionalgorithmviasparserepresentation.Firstly,thenon-localsimilarityregularizationtermisconstructedbyusingthesimilarimagepatchestopreservetheedgeinformation.Then,themanifoldlearningregularizationtermisconstructedbyutilizingthelocallylinearembeddingapproachtoenhancethestructuralinformation.Theexperimentalresultsvalidatethattheproposedalgorithmhasasignificantimprovementcomparedwithseveralsuper-resolutionalgorithmsintermsofthesubjectivevisualeffectandobjectiveevaluationindices.
简介:Amodifiedaperture-synthesismethodisreportedtoimprovetheresolutionofareconstructedimageindigitalholographybyasinglehologram.Aseriesofsub-hologramsincoherentlyoverlappedonaCCDarerecordedasasingleaperturesynthesizeddigitalhologram.Theangulardivisionmultiplexingisintroducedtoboththeobjectandthereferencepathforholographicrecording.Thefinalsuper-resolvedimageisobtainedbysynthesizingtheseveralreconstructedimages.Intheexperiment,atwo-dimensionaltransparentUSAFresolutiontesttargetisused.Theresultdemonstratesthattheresolutionofthereconstructedimageisimprovedfrom16.00lp/mmto22.64lp/mminthehorizontaldirection.
简介:1.ObjectiveAgraphitedeposithasbeendiscoveredinSujiquan,Xinjiangin1980s,whichprovidesdetailedgeologicalsettingsforthesuper-largegraphitedepositdiscoveredinHuangyangshanplutonwithtotalreservesupto7.264×10^9tin2017.OutcropsofigneousrocksinthestudyareaincludeMiddleDevonianplagioclasegraniteandLateCarboniferousalkalifeldspargranitethatisreferredtotheHuangyangshanpluton,whichincludestheLowerCarboniferousHeishantouFormationandJiangbasiFormation,bothofwhichconsistofvolcanic-sedimentaryrocks(Fig.1).Sujiquanfaultprovidedpassageforthemigrationofvolcanicintrusions.Graphitedepositsareusuallyhostedbymetamorphicrocks,butHuangyanshandepositsarehostedbygraniterocks,whicharerarelyknown.TheHuangyangshangraphitedeposithostedbygraniteplutonatHuangyangshanareawasdiscoveredbyXinjiangBranchofChinaNationalGeologicalExplorationCenterofBuildingMaterialsIndustrysince2015.
简介:Basedontheexperimentalresultsofsuper-elasticNiTialloy,athree-dimensionalsuper-elasticconstitutivemodelincludingbothofstress-inducedmartensitetransformationandplasticityisconstructedinaframeworkofgeneralinelasticity.Intheproposedmodel,transformationhardening,reversetransformationofstress-inducedmartensite,elasticmismatchbetweentheausteniteandmartensitephases,andtemperature-dependenceoftransformationstressandelasticmodulusofeachphaseareconsidered.Theplasticyieldingofmartensiteoccurredunderhighstressisaddressedbyabilinearisotropichardeningrule.Drucker-Prager-typedtransformationsurfacesareemployedtodescribetheasymmetricbehaviorofNiTialloyintensionandcompression.Thepredictioncapabilityoftheproposedmodelisverifiedbycomparingthesimulatedresultswiththecorrespondentexperimentalones.BasedonbackwardEuler'sintegration,anewexpressionofconsistenttangentmodulusisderived.TheproposedmodelisthenimplementedintoafiniteelementpackageABAQUSbyuser-subroutineUMAT.Finally,thevalidityofsuchimplementationwasverifiedbysomenumericalsamples.
简介:Theconstructionofhigh-filledloessprojecthassomeengineeringandtechnicalchallenges,suchasexcavationofearthandbackfillingofeartharebothlarge,complexconstructionenvironment,varietyofinfluencefactors.Accordingtothissituation,thispaperpresentsadynamic3Dvisualizationmethodforhigh-filledprojectbasedonvolumerendering.Throughcomparativeanalysisandvisualanalysis,realizedatdifferenttimesoftheLoessfillinternaldetectiondatavisualizationandanalysispresented.Theresultsshowthatthisvisualizationmethodcandirectlyandaccuratelydisplaytheconstructionprocess,helpdecisionmakersmasterconstructioninformationandprocess.
简介:Anewmethodofsuper-resolutionimagereconstructionisproposed,whichusesathree-step-trainingerrorbackpropagationneuralnetwork(BPNN)torealizethesuper-resolutionreconstruction(SRR)ofsatelliteimage.ThemethodisbasedonBPNN.First,threegroupslearningsampleswithdifferentresolutionsareobtainedaccordingtoimageobservationmodel,andthenvectormappingsarerespectivelyusedtothosethreegrouplearningsamplestospeeduptheconvergenceofBPNN,atlast,threetimesconsecutivetrainingarecarriedontheBPNN.Trainingsamplesusedineachstepareofhigherresolutionthanthoseusedintheprevioussteps,sotheincreasingweightsstoreagreatamountofinformationforSRR,andnetworkperformanceandgeneralizationabilityareimprovedgreatly.Simulationandgeneralizationtestsarecarriedonthewell-trainedthree-step-trainingNNrespectively,andthereconstructionresultswithhigherresolutionimagesverifytheeffectivenessandvalidityofthismethod.
简介:WhensupertyphoonSepatcameclosetotheFujiancoastlineonthenightof18August2007(codedas0709inChineseconvention),anassociatedtornado-likeseverestormdevelopedat2307–2320BeijingStandardTimeinLonggang,CangnanCounty,WenzhouPrefecture,ZhejiangProvinceapproximately300kmawayintheforwarddirectionofthetyphoon.Thestormcausedheavylossesinlivesandproperty.Studyingthebackgroundoftheformationofthestorm,thispaperidentifiessomeofitstypicalcharacteristicsafteranalyzingitsretrievalofDopplerradardata,verticalwindshearandsoon.Synopticconditions,suchasunstableweatherprocessesandTBB,arealsostudied.
简介:摘要本文对新型奥氏体耐热钢Super304H(A213-S30432)进行简单介绍,分析了该钢种的焊接性及焊接技术要点,结合我公司的工程实例对焊接该钢种所采取的焊接工艺方法及所遇到的质量问题进行了总结。
简介:配备了小型数码相机的无人机(UVA)可用于快速测绘地面分辨率高的滑坡图。在法国Supe-Sauze滑坡研究区,利用无线遥控迷你型四旋翼无人机拍摄整个山体滑坡的高分辨率正射镶嵌影像,并制作了几个地区的数字地形模型(DTM)。本文评价了UAV对滑坡表面裂缝和位移的成像能力及评估了适于校正这些数据资料的后续图像处理方法。利用2007年5月拍摄的高分辨率正射影像和2008年10月基于UAV获取的正射镶嵌图,测量了Supe-Sauze滑坡水平位移是在7至55m之间。确定了某些地区的持续变形,将裂缝与冰河时代相比发现,裂缝分布区域及方向的不同和基岩地形直接相关。UAV展示了其在获取滑坡数据方而的能力,但还需降低数据处理时问,便于有效生成基于摄影测量的DTM正射镶嵌图,同时最大限度地减少影像配准误差。
简介:Multisatellitedataisusedtoanalyzethecharacteristicsofthreeeyewallreplacementcycles(ERCs)duringthelifetimeofTyphoonMuifa(1109).Spiralrainbandsevolutions,concentriceyewall(CE)structuremodes,CEdurations,andintensitychangesarediscussedindetail.Inaddition,anERCevolutionmodelofTyphoonMuifaisgiven.Therearefourmainfindings.(1)Theouterspiralrainbandjoinsendtoendtoformtheoutereyewallafteritdisconnectsfromtheoriginal(inner)eyewall.Theinnereyewallweakensastheoutereyewallbecomesaxisymmetricandisintensified.Thecontractionoftheoutereyewallcausestheinnereyewalltodissipaterapidly.Finally,theERCendswithanannulareyewallorspiralrainbands.(2)AlthoughtheCEdurationtimesofTyphoonMuifa’sthreeERCscoveredalargerange,theCEstructureswereallmaintainedforapproximately5hfromtheformationoftheaxisymmetricoutereyewalltotheendofthecycle.(3)Thereisnoobviousprecipitationreflectivityintheeyeormoatregionforthesubsidenceflow.Theconvectionwithinthetwoeyewallsisorganizedasaradiallyoutwardslopewithincreasingheight.(4)TyphoonintensityestimationresultsbasedonADTmaynotexplaintheintensityvariationsassociatedwithERCcorrectly,whilethetyphoon’swarmcoredataretrievedfromAMSU-Aworkswell.
简介:TheinfluenceofthreedifferentAl2O3powderonself-flowingaluminacastablewasstudied.MaximumcompactionofsamplewascomputedbyAndresenEquation.TheresultshowedthattheAl2O3powder,whichhasmuchsmallerparticlesize,couldimprovethemicrostructureandthemechanicalpropertiesofcastableunderroomtemperatureandhightemperature.Withthesamepowdersize,theroomtemperaturestrengthofthecastableaddedwithAl2O3powderproPertiesofwhichwerealteredbyaddingmineralizingagent,washigherthanthatofthecastableaddedwithcommonAl2O3powder,buttheflowabilityofthesethreedifferentcastablewasalmostthesame.
简介:在这研究,当簇被用来设计由中央的和六外部heptamers组成的super-heptamer,金nanodisk在heptamer聚类取向。我们由勾略检验了电浆子和Fano回声的位置和运动光谱为各种各样的nanodisk尺寸的上层建筑的反应。在superradiant和nanodisk簇的subradiant电浆子回声模式之间的干扰的质量被发现强烈取决于结构的配置和环境媒介的折射索引。我们用nanodisk代替了中央heptamer并且由几何上改变nanodisk结构探查了Fano回声的位置。最后,学习结构的两个的电浆子反应上的绝缘的环境的效果数字地并且理论上被检验。到液体物质的存在的有限plasmonic结构的局部性的表面电浆子回声敏感被阴谋优点的线性数字调查并且出现。有限差别的时间域方法被用作一个数字工具调查结构的电浆子反应。