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简介：AnelectromagnetdesignsystemisdevelopedusingVisualC++languageandOpenGLtechnologytovisualizeparametric3Dmodel.Thesystemconsistsofprimarydesign,optimizationdesign,dynamicandstaticcharacteristics,andvisualsimulation.Allempiricalparametersandcurvesusedindesignprocessarestoredindatabase.Throughhuman-computerinteractions,anelectromagneticsystemcanbedesignedconvenientlywiththeresultsandcharacteristicscurvesdisplayedingraphicmodel.Usingthissystemcangreatlyshortentheprocessofproductdesign,andtheresultssatisfytechnicalrequirements.

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

简介：Wededuceacompletewavepropagationequationthatincludesinhomogeneityofthedielectricconstantandpresentthispropagationequationincompactvectorform.Althoughsimilarequationsareknowninnarrowfieldssuchasradiowavepropagationintheionosphereandelectromagneticandacousticwavepropagationinstratifiedmedia,wedevelophereanovelapproachofusingsuchequationsinthemodelingoflaserbeampropagationinnonlinearmedia.Ourapproachsatisfiesthecorrespondenceprinciplesinceinthelimitofzero-lengthwavelengthitreducesfromphysicaltogeometricaloptics.

简介：Solitarywavesinrelativisticelectromagneticplasmasareobtainednumerically.Thelongitudinalmomentumofelectronshasbeentakenintoaccountintheproblem.Itisfoundthatinthemovingframewithelectromagneticfieldpropagatingthesolitarywavescanexistinbothcases,wherethevectorpotentialfrequencyislargerorsmallerthantheplasmacharacteristicfrequency.

简介：Inthispaper,thesturctureofatop-face-swayelectromagneticmicromotoranditsprinciple,fabricationandpreformanceareintroduced.Acombinationoftheelectromagneticactuatingandtheplanetaryreducingprovidesthismicromotorandadvantageoflowrotationalspeedandhightorque.Inaddition,sinceaflexiblecouplingabsorbstheswayandonlyoutputsrotationspeedhasarangeof20-860rpm,anditsdrivingcurrentis300mA.Theoutputtorqueofthemicromotorismeasuredtobe13.0μNm.

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简介：Multiphaseflowcontrolwithelectromagneticbraking(EMBr)iswidelyusedinthecontinuouscastingofsteelslabs.Thebasicaimoftheflowcontrolsystemoftheprocessistodelivermoltensteelfromtheladlethroughthetundish,uppertundishnozzle,slidegate,andsubmergedentrynozzleintothemoldregionwithminimaldefects.Thisrequirestheoptimizationofturbulencelevelsatameniscustoavoidbothanexcessivelyfastflow(whichcreateshighfluctuationsofthemeniscuslevelinadditiontoslagentrapment,surfacenonuniformities,andsurfacedefects)andinsufficientslowflow(whichleadstomeniscussolidification,inadequatefluxinfiltration,andsurfacedefects).Inthisstudy,aEulerian-LagrangianapproachisusedtoinvestigatetheeffectsofEMBrandArbubbleinjectiononthesurfaceflowvelocity.TheresultsshowthathighArinjectionratescanleadtoanincreaseinsurfacevelocity.

简介：在这篇文章，为作为直径地小的电磁的包括的远地的察觉的一个拓扑的敏感框架被建立。在固定频率的电的远地的散布振幅的单个、多重的大小的盒子被考虑。算法的性能为定位包括以它的分辨率和敏感理论上被分析。关于测量和中等噪音的框架的稳定性被讨论。而且，signal-to-noise比率的量的结果被介绍。一些数字结果被介绍与单个、多重的大小说明建议框架的察觉能力。

简介：Morestableandaccuraterecursiveformulasandacomputingprocedureforscat-teringcoefficientcalculationofamultilayeredsphereareproposed,ThisprocedureinvolvesthreelogarithmicderivativesofRicatti-Besselfunctionψ_n~＇(z)/ψ_n(z),X_n~＇(z)/X_n(z),ξ_n~＇(z)/ξ_n(z),aswellastheratioψ_n(z)/X_n(z).Theasymptoticbehavior,stability,andaccuracyoftheprocedureandscatteringcoefficientsa_nandb_narediscussedforvariouscomplexrefractiveindices.Thisprocedurecanbeappliedtolargeandsmallinhomogeneoussphericalparticles.

简介：Inthispaperwepresentanewunifiedtheoryofelectromagneticandgravitationalinteractions.Byconsideringafour-dimensionalspacetimeasahypersurfaceembeddedinafive-dimensionalbulkspace-time,wederivethecompletesetoffieldequationsinthefour-dimensionalspacetimefromthefive-dimensionalEinsteinfieldequation.BesidestheEinsteinfieldequationinthefour-dimensionalspace-time,anelectromagneticfieldequationisobtained：aF^ab--ζR^baA^a=-4πJ^bwithζ=-2,whereFasistheantisymmetricelectromagneticfieldtensordefinedbythepotentialvectorA^a,RabistheRiccicurvaturetensorofthehypersurface,andJ^aistheelectriccurrentdensityvector.Theelec-tromagneticfieldequationdiffersfromtheEinstein-Maxwellequationbyacurvature-coupledtermζRb^aA^a,whosepresenceaddressestheproblemofincompatibilityoftheEinstein-Maxwellequationwithauniversecontainingauniformlydistributednetcharge,asdiscussedinapreviouspaperbytheauthor[L.-X.Li,Gen.Relativ.Gravit.48,28（2016）].Hence,thenewunifiedtheoryisphysicallydifferentfromKaluza-KleintheoryanditsvariantsinwhichtheEinstein-Maxwellequationisderived.Inthefour-dimensionalEinsteinfieldequationderivedinthenewtheory,thesourcetermincludesthestress-energytensorofelectromagneticfieldsaswellasthestress-energytensorofotherunidentifiedmatter.Undercertainconditionstheunidentifiedmattercanbeinterpretedasacosmologicalconstantinthefour-dimensionalspacetime.Wearguethat,theelectromagneticfieldequationandhencetheunifiedtheorypresentedinthispapercanbetestedinanenvironmentwithahighmassdensity,e.g.,insideaneutronstarorawhitedwarf,andintheearlyepochoftheuniverse.

简介：Anumericalsolutionoftheweightfunctionforatwo-electrodeelectromagneticflowmeterwasproposed.Thesolutionwasobtainedbyusingthefiniteelementmethodbasedonthebasicequationofatraditionaltwo-electrodeelectromagneticflowmeter.Thetwo-dimensionaldistributionoftheweightfunctionoftheelectromagneticflowmeterobtainedwasverifiedbytheanalyticalsolution.Three-dimensionaldistributionoftheweightfunctionwasalsopresentedinthepaper.Itcanbeemployedtoanalyzethesensitivityandlinearityoftheelectromagneticflowmeterwithnon-uniformmagneticfield,andeventoassistthedesignoftheexcitationcoilpair.

简介：Geant4LowEnergyElectromagneticpackageProvidesaprecisetreatmentofelectromagneticinterationsofparticleswithmatterdowntoverylowenergies(250oVforelectronsandphotons,<1keVforhadronsandions),Itincludesaverietyofmodelsfortheelectromagneticprocessesofelectrons,photons,hadronsandions,takingintoaccountadvancefeatures,suchasshelleffectsandeffectsduetochargedependence.Thecomprehensivesetofparticletypesitcanhandle,thevarietyofmodelingapproachesandtheextendedcoverageofenergyrangemakethispackageauniquetoolamongMonteCarlocodesonthemarket,andofrelevancetoserveralexperimentaldomainsinHIEP,astroparticlephysics,spacescienceandbiomedicalstudies.

简介：Theelectromagneticbalanceheadisusedforbalancingtheelectricspindle.Thispaperanalyzestheinternalstructureoftheelectromagneticbalanceheadandintroducesthestructureofthecounterweightplateandtherangeofthebalanceinthemovingring.Theprincipleofhowtheelectromagneticfieldgeneratedbythestaticcoilactsonthemovingringisalsoinvestigated.ThemodelisbuiltinAnsoftMaxwellandtheexcitationparametersandboundaryconditionsaresetup.Throughtheanalysisofthemagneticfieldgeneratedbythestaticcoilinthepositionofthemovingring,itisverifiedthatthestaticloopcoilcandrivethecounterweightplate.

简介：Itisdemonstratedbysimulationsandanalysisthatawakefielddrivenbyanultrashortintenselaserpulseinunderdenseplasmacanemittunableelectromagneticradiationalongthelaserpropagationdirection.Theprofileofsuchakindofradiationiscloselyassociatedwiththestructureofthelaserwakefield.Ingeneral,electromagneticradiationintheterahertzrangewithitsfrequencyafewtimestheelectronplasmafrequencycanbegeneratedinthemoderateintensityregime.Inthehighlynonlinearcase,achainofradiationpulsesisformedcorrespondingtothenonlinearstructureofthewake.Studyshowsthattheradiationisassociatedwiththeself-modulationprocessofthelaserpulseinthewakefieldandresultingtransverseelectronmomentafrommodulatedasymmetriclaserfields.

简介：圆形的电的阻抗断层摄影术(EIT)的一个直觉的2D模型有小尺寸电极的传感器基于分析功能的理论被建立。模型的Thevalidation从Laplace方程的答案用结果被证明。建议在上到到敏感的有病条件的性质的电极优化和解释，矩阵基于模型被提供，它考虑电极距离并且能通过保角的转变与任何简单连接区域被概括到传感器。图象重建算法基于模型被实现用从在TianjinUniversity开发的EIT系统收集的试验性的数据显示出模型的可行性。在有一种人的像胸的配置的模拟，电的传导性分布基于模型的保角的转变用等位的背设计(EBP)和Tikhonovregularization(TR)被重建。算法对联机图象重建基于模型合适，重建的结果在尺寸和位置两个都好。

简介：与缺点多层的分数维的领唱者的二新奇结构被介绍。光传播矩阵方法被用来计算发射度和反射。与一般领唱者相比多层，这些新奇结构有更宽的stopbands并且在更宽的stopbands的中间给超级狭窄的乐队看，它能被用作超级狭窄的通带过滤器。当在领唱者有一个嵌入的缺点时，通行证乐队能是1530nm的红外线的波长附近的不到0.6nm多层。在中央波长的光传播比99%高，它意味着一很低插入损失。如果有三层，三座超级狭窄的山峰能在stopband的中间被发现。中央波长是分别地1232.4nm，1372.8nm和1538.3nm。它比其它种狭窄的乐队过滤器好一些，它可以在光通讯被使用。CLC数字O482.3这个工作被国家科学基金支持(60577043)，上海教育委员会(217608)的发展基础和上海领先的大学教师惩罚工程(T0102)。

简介：Thisstudyproposesanewelectromagneticrectangularmixer,andnumericallyexaminesthemixingcharacteristicsoftwodifferentelectrolytesolutionsinthedeviceunderauniformmagneticfield.Themixerconsistsofaconduitwithelectrodesequippedonitstopandbottomwalls.Thedifferenceintheelectricpotentialsappliedtothesetsofelectrodesinducesthecurrent.ThecombinationoftheinducedcurrentandmagneticfieldyieldsLorentzforce,resultinginthefluidmotionforpumpingandmixingofthetwodifferentfluids.ThenumericalsimulationiscarriedoutwiththeuseofcommercialsoftwareCFX.Thepresentnumericalmodelisvalidatedbyanexistingnumericalwork.Theeffectofdifferentvariablesonmixingefficiencyisinvestigatedinmanydifferentcaseswithtwodifferentheightsoftheductandvariousinputvoltagesoftheelectrodes.Thecurrentsimulationresultsindicatethatthemixingperformancecanbeenhancedbyusingmultiplesetsofelectrodesandapplyinghigherinputvoltages(absolutevalues)totheelectrodes.