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简介：Thegeneralizedregressionneuralnetwork-onekindofRBFneuralnetwork,ischosentoconstructtheinverse-kinematicsmodelfortheshotcreterobotwhichhasredundantdegree-of–freedom.Theinverse-kinematicsmodeloftheobjectistrainedbythegenerallearningmethod.Inconstructingmodelprocess,differentpartitionmethodsistriedtodividethejointspaceanddifferentdiffusioncoefficientvaluetotraintheneuralnetwork.Theinfluenceofthespreadcoefficienttotheapproachabilityisalsostudied.Thesimulationmethodisadoptedtotesttheperformanceoftheneuralnetwork.Thesimulationresultturnsouttobesatisfactory.

简介：把在一般计算液体动力学代码FLUENT6.3.26嵌入的二阶段的模型基于液体的体积，粘滞有在一艘可伸缩模型的KRISO容器轮船(KCS)附近的免费表面的流动数字地首先被模仿。然后与一个rigid-lid-free-surface方法，在水下流动地基于混合被计算模仿的多相的模型冒泡在KCS壳附近醒来。二方程的骚乱模型和雷纳兹应力建模的可实现的k-被用来在轮船上分析骚乱模型的效果冒泡醒来。空气乘火车模型，它相对免费表面的正常速度坡度，和解决的方法被品质上验证合理计算结果。

简介：Transientmagneticcircuitmethodisadoptedtocalculatethepowerlossinwindingandshadingcoil.BasedontheanalysisofheattransferprocessinACcontactor,athermalmodelisproposedandthetemperaturefielddistributionissimulatedwith3-DFEMofANSYS.Comparisonofsimulationresultswithmeasurementsshowsthattheproposedmethodiseffective.

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简介：Asimulationiscarriedoutforthepressurefluctuationdrivenbythewaterhammer,basedonajointuseoftheonedimensionalmethodofcharacteristics(MOC)andthethree-dimensionalfinitevolumemethod(FVM).Thethree-dimensionalvisualizationofthecavitationinducedbythewaterhammerisimplemented,andthetemporalandspatialanalysesofextremeregionsaremade.Apracticalcaseofthewaterhammer,withtheminimumboundarypressurehigherthanthesaturatedvaporpressurecondition,issimulated.Thesimulationpredictionthatthecavitationwouldoccurinthefrontofthegasketcouldservesomeguidelinefortheoptimizationofindustrialdesigns.

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简介：Thepaperproposesaphysicalmodelforthemotionofthecontactlineandthegas-liquidinterface.Thelocalmotionofthecontactlineatthesolidwallisassumedandtheinterfacebetweengasandliquidistracedbyalevelfunction.Thefinitevolumemethodandstaggeredgridsareusedtosolvethegoverningequationnumerically.Themotionofthewatercolumninaverticalpipeiscomputedandtheresultsareingoodagreementwithexperimentaldata.

简介：Thehorizontalmigrationofproppantwasnumericallyinvestigatedwithatwo-fluidmodel,inwhichtheinteractionbetweenfracturingfluidandproppant,alongwiththatamongproppantswastakenintoaccountthroughinterphaseforces.Themigrationprocessandthevolumetricconcentrationoftheproppantwereexaminedundervariousconditions,andtheaveragedvolumetricconcentrationoftheproppantwasobtained.Thepresentresearchmightbeusefulintheprocessdesignofthehydraulicfracturingintheoilfields.

简介：Sequentialsimulationoflargecomplexphysicalsystemsisoftenregardedasacomputationallyexpensivetask.Inordertospeed-upcomplexdiscrete-eventsimulations,theparadigmofParallelandDistributedDiscreteEventSimulation(PDES)hasbeenintroducedsincethelate70s.Inthispaperwe'llanalyzetheapplicabilityofPDEStothemodelingandanalysisoflargecomputersystem;suchsystemsareincreasinglycommonintheareaofHighEnergyandNuclearPhysics,becausemanymodernexperimentsmakeuseoflarge"computefarms",Somefeasibilitytestshavebeenperformedonaprototypedistributedsiumulator.

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简介：TheaimofthisworkistopresentthesimulationstudiesinevaluatingdifferentdatareplicationstrategiesbetweenRegionalCenters.ThesimulationFrameworkdevelopedwithinthe"ModelsofNetworkedAnalysisatRgionalCenters”(MONARC)project,asadesignandoptimizationtoolforlargescaledistributedsystems,hasbeenusedforthesemodelingstudies.Remoteclient-sereraccesstodatabaseserversaswellasftp-likedatatransfershavebeenralisticallysimulatedandtheperformanceandlimitationsarepresentedasafunctionofthecharacteristicsoftheprotocolusedandthenetworkparameters.

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简介：Numericalsimulationofantennaeisatopicincomputationalelectromagnetism,whichisconcernedwiththenumericalstudyofMaxwellequations.BydiscreteexteriorcalculusandthelatticegaugetheorywithcoefficientR,weobtaintheBianchiidentityonprismlattice.Bydefininganinnerproductofdiscretedifferentialforms,wederivethesourceequationandcontinuityequation.ThoseequationscomposethediscreteMaxwellequationsinvacuumcaseondiscretemanifold,whichareimplementedonJavadevelopmentplatformtosimulatetheGaussianpulseradiationonantennaes.

简介：ymboliccircuitsimulatoristraditionallyappliedtothesmall-signalanalysisofanalogcircuits.Thispaperestablishesasymbolicbehavioralmacromodelingmethodapplicabletobothsmall-signalandlarge-signalanalysisofgeneraltwo-stageoperationalamplifiers(op-amps).Theproposedmethodcreatesatwo-poleparametricmacromodelwhoseparametersareanalyticalfunctionsofthecircuitelementparametersgeneratedbyasymboliccircuitsimulator.Amomentmatchingtechniqueisusedinderivingtheanalyticalmodelparameter.Thecreatedparametricbehavioralmodelcanbeusedforop-ampsperformancesimulationinbothfrequencyandtimedomains.Inparticular,theparametricmodelsarehighlysuitedforfaststatisticalsimulationofop-ampsinthetime-domain.Experimentresultsshowthatthestatisticaldistributionsoftheop-ampslewandsettlingtimecharacterizedbytheproposedmodelagreewellwiththetransistor-levelresultsinadditiontoachievingsignificantspeedup.

简介：ＮＵＭＥＲＩＣＡＬ　ＳＩＭＵＬＡＴＩＯＮ　ＦＯＲ　ＣＯＮＴＡＭＩＮＡＮＴＳ　ＡＮＤ　ＷＡＴＥＲ　ＴＲＡＮＳＰＯＲＴ　ＩＮ　ＳＯＩＬＳＭＥＲＩＣＡＬＳＩＭＵＬＡＴＩＯＮＦＯＲＣＯＮＴＡＭＩＮＡＮＴＳＡＮＤＷＡＴＥＲＴＲＡＮＳＰＯＲＴＩＮＳＯＩＬＳ￥Ｗａ...

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简介：Wepresentamethodtorepresentmulti-resolutionvectorgraphicssuchasroadnetworksorrailwaynetworksinvirtualenvironment.Thesevectordatacanbeinteractivelyeditedandthelandscapeandbeexploredinrealtimeatanyaltitudefromflightviewtocarview.Wedesignacontext-focusedvectordescriptionoflinearcanarealfeatures,withassociatedcustomizeddefinitionpaintertospecifytheirappearance(colorandmaterial)andtheirdisplaymode(detailedmodeorsimplifiedmode).Therearesomespecialproblemsindrawingvectorgraphicsinvirtualenvironment.Floating-pointround-offerrorappearwhenweusealowviewpointtoobservethescene,anditleadstoscenejittering.Drawing3Dwidelinesturnsintoaproblemon3Dterrain.Wedesignaview-basedself-adaptiveinterpolationalgorithmandanoffsetlinegeneratingalgorithmtosolveit.Ourresultsshowhighperformancewithgoodvisualquality.

简介：Thinfilmsofpolymerblendscomposedofalternatingcopolymer,diblockcopolymerand/orhomopolymerarestudiedusingMonteCarlosimulation.Amultilayermorphologyisobservedinthefilm,thatis,theblendedpolymersassembleintoindividualdomainsarrangedfrominteriortothesurfacesofthefilm.Thecoexistingcomponentsresidingthroughouttheneighboringdomainsinthefilmmakenodistinguishableinterfacebetweenanyneighboringdomains.Bythismeans,itformsaverticalcompositiongradientinthepolymericfilm.Beingdifferentfromlayer-by-layerdepositionofpolyelectrolyteorhydrogenbondingapproachetc.,thelayeredstructureinthisstudyisformedbypolymerblendinginonestep.Alternatingcopolymersarefoundtobeessentialcomponentstoformverticalcompositiongradient(layeredstructure)inthinfilms.