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简介：Filmcoolingisintroductionofasecondaryfluid(coolantorinjectedfluid)atoneormorediscretelocationsalongasurfaceexposedtoahightemperatureenvironmenttoprotectthatsurfacenotonlyintheimmediateregionofinjectionbutalsodownstreamregion.Thispapernumericallyinvestigatedthefilmcoolingeffectivenessontwotypesofholegeometrieswhicharecut-shapedholeandantivortexhole.The3Dcomputationalgeometriesaremodeledwithasingle30degangledholeonaflatsurface.Thedifferentblowingratiosof0.5,1,1.5,2,2.5,3,3.5,4,4.5,5andk-Epsilonturbulencemodelareusedinthisstudy.Atwodimensionaldistributionoffilmcoolingeffectivenessinthedownstreamregionofthecoolingholeisperformed.AcomparisonofspanwiseaveragedeffectivenessisalsoperformedinthefieldstartsfromcenterpointofholetoX/D=30.

简介：TherearesomeadjustableparameterswhichdirecdyinfluencetheperformanceandstabilityofParticleSwarmOp-ttimizationalgorithm.Inthispaper,stabilitiesofPSOwithconstantparametersandtime-varyingparametersareanalyzedwithoutLipschitzconstraint.Necessaryandsufficientstabilityconditionsforaccelerationfactorψandinertiaweightwarepresented.Exper-imentsonbenchmarkfunctionsshowthegoodperfomanceofPSOsatisfyingthestabilitycondition,evenwithoutLipschitzcon-straint.Andtheinertiaweightwvalueisenhancedto(-1,1).

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简介：Thisarticlepresentsanovelimageinterpolationbasedonrationalfractalfunction.Therationalfunctionhasasimpleandexplicitexpression.Atthesametime,thefractalinterpolationsurfacecanbedefinedbyproperparameters.Inthispaper,weusedthemethodof‘coveringblanket’combinedwithmulti-scaleanalysis;thethresholdisselectedbasedonthemulti-scaleanalysis.Selectingdifferentparametersintherationalfunctionmodel,thetextureregionsandsmoothregionsareinterpolatedbyrationalfractalinterpolationandrationalinterpolationrespectively.Experimentalresultsonbenchmarktestimagesdemonstratethattheproposedmethodachievesverycompetitiveperformancecomparedwiththestate-of-the-artinterpolationalgorithms,especiallyinimagedetailsandtexturefeatures.

简介：Reachabilityisakeycriterioninmaintenancedesign,andhumanarmisthemainobjectinreachabilityanalysis.Thehumanarm'sDOFisreduced,andapplyingmilitarystandardsandhumanphysiologicalconstraints,thesimplifiedarmmodelof7-DOFusingD-Hmethodisbuiltup.ParticleSwarmOptimization(PSO)isusedtoacquiretheshoulder,armandhandposturewithadaptivefitnessfunction.Adetailedreachabilityanalysisisaccomplishedfordisassemblingtheboltsfromcrankshaftisgivenasanexampletovalidatethefeasibilityofusingreachabilityanalysisonmaintenancedesign.

简介：Rollingbearingiswidelyusedinmechanicalsupport,itsgeneralcomponentsaretheinnerring,outerring,theball,retaineretc..Nowmanycompaniesindevelopedcountriesanduniversityintherollingbearingastheresearchobject,andhasmadegreatprogressindesigntheory,theexperimentmethodandproductiontechnologyetc.WewillusethefiniteelementANSYStoestablishthemodelofdeepgrooveballbearing.Throughthecontactanalysis,wecangetthecontactstressbetweentheringsandballs,strain,contactstate,penetration,slidingdistanceandthefrictionstressdistribution.ThesevaluesarecomparedtothetheoreticalvalueswithHertztheory,andtheyhavebetterconsistency,providethegoodtheoreticalbasisfortheoptimizationdesignofrollingbearings.

简介：Inrecentyears,inflatablestructureshavebeenasubjectofinterestforspaceapplicationssuchascommunicationantenna,solarthermalpropulsionandentry/landingsystems.Theinflatablestructurescharacterizedbyhighstrength-to-massratios,minimalstowagevolume,whichmakesthemsuitableforcost-effectivelargespacestructures.Atypicalexamplefortheinflatablestructureistheinflatedtoruswhichoftenusedinordertoprovidestructuresupport.Inthisstudy,ourmainfocusistounderstandthedynamiccharacteristicsofaninflatedtorusinordertoformulateanaccuratemathematicalmodelsuitableforactivevibrationcontrolapplications.Acommercialfiniteelementpackage,ANSYS,isusedtomodeltheinflatedtorus.Toverifythemodeltheobtainedfrequenciesandmodeshapesarecomparedwiththepublishedresults,whicharederivedusinganalyticalapproach,theverificationshowsagoodagreementbetweentheFEMandtheanalyticalresults.Basedontheverifiedmodel,parametricstudywasinvestigated;thematerialthicknessincreasecausesthenaturalfrequenciesdecrease,whiletheincreaseoftheinflationpressuresimplyresultsinstiffeningthering,whichmeansthatthenaturalfrequencyincreased.TheFEManalysisgivesaneasyandfastwayforthevibrationanalysisofthestructurescomparedwiththecomplicatedanalyticalsolutions.

简介：一条动态输出反馈控制器设计途径基于锥，互补linearisation过程被建议为线性时间不变(LTI)有致动器的系统浸透。首先，吸引力的领域的评价被给。然后，发现吸引力的领域的一个更大的评价的一个设计方法被介绍。在设计的过程，非凸的条件被获得，因此一个锥互补linearisation过程被利用解决非凸的可行性问题。二个例子被给说明设计方法的效率。

简介：Accordingtoelasticcontacttheory,contactmodelbetweenrollerandraceisestablished.ComparedwiththeHertzresults,theresultsareproved,basedonwhichcontactstressdistributionofdifferentcrowningandinitialcontactlengthisgiven,thentheappropriatevalueisderived.Onthebasis,inertiaforceanddifferentradialforceisgivenintoconsideration.Viaanalysis,itconcludesthatunderbalancedpureradialloadconditionthelargestcontactstressbetweenrollerandraceincreasesalongwithcrowningvalueincreasing.Withthesamecrowningvalue,thelargestcontactstressbetweenrollerandracedecreasesinthefirstandincreasesattheendalongwithinitialcontactlengthincreasing.Contactstressbetweenrollerandouterraceincreasesalongwithrevolutionspeedincreasing.

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简介：随着SQLServer2005本发布的临近，现在是时候讨论它为数据库开发人员带来的一些新特性了。为了激发您的好奇心，最好还是从SQLServer2005AnalysisServices的数据挖掘新特性开始吧!其中，您将会发现它改进了两个现有算法，引入了五个新算法，并增加了十多个可视化界面帮助处理数据关联。如果只是粗略的看一眼，则会错过所有的强大功能。

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简介：在在标记的来源域利用知识在目标域预言未标记的数据转移学习目的，在分布在域是不同的的地方。在为转移学习的各种各样的方法之中，一个种算法从不同领域集中于在桥特征和所有另外的特定的特征之间的通讯，并且以后进行经由单个看法的通讯学习的转移。然而，单个看法的通讯可以由于不正确的关联发现的问题阻止这些算法进一步的改进。处理这个问题，我们为在一个多看法通讯观点学习的转移建议一个新方法，它被称为多看法主要部件分析(MVPCA)途径。MVPCA分别地从不同领域发现在越过所有领域代表性的桥特征和特定的特征之间的通讯，并且进行以一个多看法方法由维数减小学习的转移，它能更好描绘知识转移。实验证明MVPCA能显著地减少一个基线非转移方法的生气领域预言错误。与合并到学习方法的单个看法的转移的多看法通讯信息，MVPCA能进一步改进一个最先进的单个看法的方法的表演。

简介：Fuzzycontrolproblemsforsystemswithboundeduncertaindelayswerestudied.BasedonLyapunovstabilitytheoryandmatrixtheory,anonlinearstatefeedbackfuzzycontrollerwasdesignedbylinearmatrixinequalities(LMI)approach,andtheglobalexponentialstabilityoftheclosed-loopsystemwasstrictlyproved.Forafuzzycontrolsystemwithboundeduncertaindelays,undertheglobalexponentialstabilityconditionwhichisreducedtoplinearmatrixinequalities,thecontrollerguaranteesstabilityperformancesofstatevariables.Finally,thesimulationshowsthevalidityofthemethodinthispaper.

简介：Inordertoovercomemanyproblemsandshortcomingsofourthree-dimensionaldesigneducationinmechanicaldrawing,makethestudentsmasterthemoderndesignmethodandtechnologyeasily,modernmodelingmethodandshapingmethodareintroduced,andtheshapingdesigningmethodsofassembled-bodyareanalyzedincludingbasicrequirementsforshapingdesign,commonprinciplesofshapingandshapingdesignmethod.Itwillbehelpfultoimprovethespatialimaginationandmodellingabilityofstudent.

简介：Thispaperdealswiththeproblemofrobuststabilityforcontinuous-timesingularsystemswithstatedelayandparameteruncertainty.Theuncertainsingularsystemswithdelayconsideredinthispaperareassumedtoberegularandimpulsefree.Bydecomposingthesystemsintoslowandfastsubsystems,arobustdelay-dependentasymptoticstabilitycriteriabasedonlinearmatrixinequalityisproposed,whichisderivedbyusingLyapunov-Krasovskiifunctionals,neithermodeltransformationnorboundingforcrosstermsisrequiredinthederivationofourdelay-dependentresult.Therobustdelay-dependentstabilitycriterionproposedinthispaperisasufficientcondition.Finally,numericalexamplesandMatlabsimulationareprovidedtoillustratetheeffectivenessoftheproposedmethod.

简介：Acomputationalinvestigationwasperformedtopredicttheeffectsofaerodynamicperformancedegradationonaircraftswepttaperwingwithandwithout10minutesand22.5minutesglazeiceaccretions.Inthisstudy,thethree-dimensionalsimulatedglazeiceshapesweredefinedfromaseriesoftwo-dimensionalicesections.TheaerodynamicperformancesofglazeicedsweptwingswithC-Hstructuremulti-blockgridwereanalyzedandevaluated.ThesteadyReynolds-AveragedNavier-Stokes(RANS)equationsareemployedtocomputesolutionswithimplementationoftwoequationShear-StressTransport(SST)turbulencemodelandsecond-orderupwinddifferencingforentireicedwingflowfield.Computedresultswerecomparedwithavailableexperimentaldata.TheCFDcomputationcanalsoaccuratelypredicttheaerodynamicperformancedegradationoflift,dragandpressurecoefficientsoffinitesweptwingwithglazeiceaccretionswhichhavetwobigupperandlowerhorn.