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简介：Permanentpacemakerimplantisacommonlyperformedcardiacprocedurefortreatmentofbradycardiaorconductionsystemabnormality.Withconventionalrightventricular(RV)pacingaleadisimplantedattheRVapexorontheRVseptum.However,RVapicalorRVseptalpacingcausesiatrogenicleftbundle-branchblockandventriculardyssynchronyandcanleadtoadversecardiacremodeling,apacing-mediatedcardiomyopathy,andcongestiveheartfailure.Alternatively,permanentHis-bundlepacingusestheintrinsicrapidly-conductingHis-Purkinjesystemtoactivatetheventricle,therebymaintaining(orsometimesevenrestoring)ventricularsynchrony.ManypatientsmayderivebenefitfrompermanentHis-bundlepacing.

简介：Although,theessenceofotopointsremainsunknownatthemoment,manymedicalworkershavetermedthemtemporarilyas"auricularspecificstimulatingpoints".Theygiveanexplanationthatwhentheinternalorgansorthebodytrunkisoutoforder,tenderpoints,changesofthecutaneouselectricalresistance,appearance,colour,etc.mayoccuratsomesitesoftheauri-cle.Themedicalworkerscanusethesereactionsasareferenceformakingadiagnosisandstimulatethesesitestopreventandtreatdiseases.Thesereactionpointsarealsotheotopoint.Therefore,theotopointisalsocalledastenderpoint,orgoodconductionpoint,reactionpoint,stimulatingpointortreatmentpoint.

简介：与同类的Dirichlet边界条件检验椭圆形的类型的一个非线性的部分微分方程；比较和最大的原则的证明；有限元素的近似；为线性元素的最大的原则的分离类似物的介绍。

简介：当考虑热传导时，阶段地建模途径被用来学习纯Ni的氧化行为。在这计算，温度T上的Cahn-Hilliard方程Lc的系数的依赖被考虑。到这个目的，为纯Ni当模特儿的高温度的氧化实验和阶段地在600点在气压下面在空中被执行，700，并且\(800\，^{\circ}\hbox{C}\)。氧化率被thermogravimetry测量，在这些温度的Lc经由交互算法是坚定的。与Lc\({构造的-}T\)关系，Ni的氧化行为当考虑热时，传导被调查。氧化度，氧化物电影厚度，和特定的重量获得上的温度边界的影响被讨论。当模特儿的途径在这研究建议了的阶段地将给氧化抵抗分析的一些热点和热保护材料的冷却措施设计。

简介：Thispaperpresentsahybridgradedelementmodelforthetransientheatconductionprobleminfunctionallygradedmaterials(FGMs).First,aLaplacetransformapproachisusedtohandlethetimevariable.Then,afundamentalsolutioninLaplacespaceforFGMsisconstructed.Next,ahybridgradedelementisformulatedbasedontheobtainedfundamentalsolutionandaframefield.Asaresult,thegradedpropertiesofFGMsarenaturallyreflectedbyusingthefundamentalsolutiontointerpolatetheintra-elementfield.Further,Stefest'salgorithmisemployedtoconverttheresultsinLaplacespacebackintothetime-spacedomain.Finally,theperformanceoftheproposedmethodisassessedbyseveralbenchmarkexamples.Theresultsdemonstratewelltheefficiencyandaccuracyoftheproposedmethod.

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简介：形成和传导性的电影的激活试验性地被学习。电源供应，peak-to-peak30V三角侧面电压，被用于分别地包含0.25%，0.5%，和1%钯的三种传导性的电影。在实验，我们处于不同条件对比了相关参数的值，在阳极面板上观察了发光的点，处理并且分析，并且比较了位置和发光的点的数量相关数据。我们得到了有阀值价值Uth的结论。排放电流我当设备电压Uf比Uth大时，e将很快增加。并且排放电流我e能被设备电压Uf控制。阳极面板上的发光的点的位置与设备电压Uf被联系。CLC数字TN141

简介：Byintroducinganimageplane,theinverseheatconductionproblemwithfreeboundaryistransformedintoonewithcompletelyknownboundary,whichismuchsimplertohandle,asaby-product,theclassicalKrichhoff'stransformationforaccountingforvarialbleconductivityisrederivedandaninvarianceproertyoftheinverseproblemsolutionwithrespecttovariableconductivityisindicated.Thenapairofcomplementaryextremumprinciplesareestablishedontheimageplane.providingasoundtheoreticalfoundationfortheRitz'smethodandfiniteelementmethod(FEM),AnexamplesolvedbyFEMisalsogiven.

简介：Dual-phaselag(DPL)modelisusedtodescribethenon-Fourierheatconductioninafinitemediumwheretheboundaryatx=0isheatedbyarectangularpulsedenergysourceandtheotherboundaryistightlycontactedwithanothermediumandsatisfiesthecontinuousboundarycondition.Numericalsolutionofthiskindofnon-Fourierheatconductionispresentedinthispaper.Theresultsarecomparedwiththosepredictedbythehyperbolicheatconduction(HHC)equation.

简介：Thispaperinvestigatesthestabilityandconvergenceofsomeknowndifferenceschemesforthenumericalsolutiontoheatconductionequationwithderivativeboundaryconditionsbythefictitiousdomainmethod.Thediscretevari-ablesatthefalsemeshpointsarefirstlyeliminatedfromthedifferenceschemesandthelocaltruncationerrorsarethenanalyzedindetail.Thestabilityandconvergenceoftheschemesareprovedbyenergymethod.Animprovementisproposedtoobtainbetterschemesovertheoriginalones.Severalnumericalexamplesandcomparisonswithotherschemesarepresented.

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简介：ObjectiveToobservetheeffectofaccessorypathway(AP)conductiononPJintervalinpatientswithWolff-Parkinson-Whitesyndrome.Methods129patientswithasinglemanifestationofAPwhounderwentsuccessfulradiofrequencyablation(RFCA)wereincluded.Patientsweredividedinto10groupsaccordingtoAPlocation.ThePRintervals,QRSdurationsandthePJintervalsweremeasuredusingsimultaneous12-leadECGbeforeandafterablation.ThePJintervalsbeforeablationwerecomparedwiththatafterablation.Theatrioventricular(AV)conductiontimeviaatrioventricularnode-HisconductionsystembeforeablationwerecomparedwiththePRintervalsafterablation.Theventriculardepolarizationtimeviaatrioventricularnode-HisconductionsystembeforeablationwerecomparedwiththeQRSdurationsafterablation.Deltawaveswerecomparedbetweeneachtwogroups.Results(1)ThePJintervalsofrightposterior(RP)groupandrightposteroseptal(RPS)groupbeforeablationwereshorterthanthatafterablation(RPgroup226±18msvs236±19ms,P<0.01,RPSgroup221±18msvs238±31ms,P<0.05,respectively).(2)Therewerenosignificantdifferencesbetweentheatrioventricular(AV)conductiontimeviaatrioventricularnode-HisconductionsystembeforeablationandthePRintervalsafterablation.(3)Theventriculardepolarizationtimeviaatrioventricularnode-HisconductionsystemofRPgroupandRPSgroupbeforeablationwereshorterthanthePRintervalsafterablation(RPgroup79±12msvs87±9ms,P=0.01;RPSgroup70±13msvs86±9ms,P<0.05,respectively).(4)ThedeltawavesofRPgroupandRPSgroupwerelongerthanthatofleftposteriorgroupandleftposteroseptalgroup(P<0.05).ConclusionPJintervalisshortenedbyAPconductionwhichpre-excitesthegenerallastexcitedpartofleftventricle.ItisdeterminedbyAPlocationandtheextentofpreexcitation.

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简介：纸为温度地论述围住的体积热来源和相应功能分析的表情。这里考虑的力量密度分布正常、指数、寓言。来源由于熔化和团结为象焊接的弧，激光横梁，电子横梁，等等，在焊接水池的传送对流以及潜伏的热一样的真实的热来源建模。热来源模型的参数是未知的priori并且不得不被解决一个反的热传导问题评估。为在靶子焊接的精明的3D温度地的功能分析的技术被开发。建议技术使更加为数据输入和答案减少全部的时间可能。它与激光横梁焊接钢盘子的一个例子被表明。

简介：Thispaperpresentstwoexactexplicitsolutionsforthethreedimensionaldual-phaselag(DLP)heatconduc-tionequation,duringthederivationofwhichthemethodoftrialanderrorandtheauthors'previousexperiencesareuti-lized.Totheauthors'knowledge,mostsolutionsof2Dor3DDPLmodelsavailableintheliteratureareobtainedbynumericalmethods,andtherearefewexactsolutionsuptonow.Theexactsolutionsinthispapercanbeusedasbenchmarkstovalidatenumericalsolutionsandtodevelopnumericalschemes,gridgenerationmethodsandsoforth.Inaddition,theyareoftheoreticalsignificancesincetheycorrespondtophysicallypossiblesituations.Themaingoalofthispaperistoobtainsomepossibleexactexplicitsolu-tionsofthedual-phaselagheatconductionequationasthebenchmarksolutionsforcomputationalheattransfer,ratherthanspecificsolutionsforsomegiveninitialandboundaryconditions.Therefore,theinitialandboundaryconditionsareindeterminatebeforederivationandcanbededucedfromthesolutionsafterwards.Actually,allsolutionsgiveninthispapercanbeeasilyprovenbysubstitutingthemintothegoverningequation.

简介：Plasmasourceperformanceparameters,includingplasmaejectiondensityandvelocity,greatlyaffecttheoperationofashort-conduction-timeplasmaopeningswitch(POS).Inthispaper,theplasmasourceusedinthePOSofQiangguangIgeneratorischosenasthestudyobject.AtfirstthePOSworkingprocessisanalyzed.TheresultshowsthattheopeningperformanceofthePOScanbeimprovedbyincreasingtheplasmaejectionvelocityanddecreasingtheplasmadensity.Theinfluenceofthecableplasmagunstructureandnumberontheplasmaejectionparametersisexperimentallyinvestigatedwithtwochargecollectors.Finallyasemi-empiricalmodelisproposedtodescribetheexperimentalphenomenon.

简介：Themodeloftransientbehaviorofsemiconductorwithheat-conductionisaninitialandboundaryproblem.Alternating-directionmultisteppreconditionediterativemethodsandtheoryanalysesaregiveninthispaper.Electricpotentialequationisapproximatedbymixedfiniteelementmethod,concentrationandheat-conductionequationsareapproximatedbyGalerkinalternating-directionmultistepmethods.ErrorestimatesofoptimalorderinL2aredemonstrated.

简介：Inthisarticleavariable-domainvariationalapproachtotheentitledproblemispresented.Apairofcomplementaryvariationalprincipleswithavariabledomainintermsoftemperatureandheat-streamfunctionareflrstestablished.Basedonthem,twomethodsofsolution-generalizedRitzmethodandvariable-domainFEM-bothcapableofhandilingproblemswithunknownboundaries,aresuggested.Then,threesamplenumericalexampleshavebeentested.Thecomputationalprocessisquitestable,andtheresultsareencouraging.Thisvariationalapproachcanbeextendedstraightforwardlyto3-Dinverseproblemsaswellastootherproblemsinmathematicalphysics.

简介：Na5+xYAlxSi4-xO12superionicconductorsarerhombohedralR3cspacegroup.Theirstructuresarecharacterizedby(Alx/4Si1-x/4)O4tetrahedralinkedtoformpuckered(Al3xSi4-x)4O35ringsparalleltothebasalplaneofthehexagonalcell.Theserings,separatedbypartsofsodiumoxygenpolyhedron,arestackedtoformlargerigidcolumsparalleltocaxis.Thecolumnsarelinkedby[YO6]octahedratoformathree-dimensionalFrameworkwithlargechannelsbetweentherings.PartsofNaionslocatedinthecoresofthecolumnsaremovable.Intermsoftheconductionmechanism,theconcentrationofconductingNa+ionswascarriedoutandcomparedwiththeexperimentalresults.Itwasfoundthatthetheoreticalvaluesaccordwiththeexperimentalresults.