简介:Asimplesolutionforamultilayermetallicopticalwaveguidebytransformingitintoanequivalentthree-layerslabwaveguideispresented.Thedispersionrelationoftheequivalentthree-layerslabwaveguideissolvedbyusingasimpleiterativeformula.Thismethoditselfisexactandcanapproachanyaccuracydesired.Moreover,thenumericalresultsforfour-layerandfive-layerstructuresshowthatthesecond-ordersolutionisalsoaccurateenough.ItissimpleandhasthesameformofexpressionsforTEandTMmodesandfordifferentlayerstructures.
简介:Amethodhasbeendevisedtoanalyzemultilayerelectricallythickcircularmi-crostripantennaexcitedbyaprobe.Thecurrentontheprobeistakentobeuniform.Thismethodwasverifiedbyanalysisandexperimentofanelectricallythickcircularmicrostripan-tennawithanairgap.BasedonthefreespaceelectricdyadicGreen’sfunction,thefieldexpressionofanhorizontalelectricdipole(HED),whichislocatedatanypointofthemultilayermediaandpointsinanydirection,hasbeenderived.ByusingthisfieldexpressionandtheRichmondre-actionequation,anintegralequationintermsofelectriccurrentonthepatchisformulated.Byproperlychoosingcurrentexpansionmodes,thismethodcanbeusedforanelectricallythickmi-crostripantenna.Thetheoreticalresultsagreeverywellwithexperimentaldataforanelectricallythickcircularmicrostripantennawithanairgap.
简介:Micromechanicalfiniteelementmethodsaredevelopedbasedonanonlinearconstitutivemodelofferroelectricpolycrystals.Electromechanicalbehaviorsaheadofaninternalelectrodetiparenumericallysimulatedinmultilayerferroelectricactuators.Aroundtheelectrodeedge,thenonuniformelectricfieldgeneratesaconcentrationofstressduetotheincompatiblestrainaswellasspontaneousstrain.Thepreferreddomainswitchingenhancestheconcentrationofresidualstressandmaycausetheactuatorstocrack.Anelectricallypermeablecrackemanatingfromaninternalelectrodeisanalyzed.Alargescaledomainswitchingzoneisfoundinthevicinityofcracktips.Thelargertheactuatingstrainandelectricfieldare,thelargertheswitchingzonewillbe.Thesizeofswitchingzoneevenreachesthescaleofcracklengthwithincreasingelectromechanicalloading.
简介:Thephotosensitivemultilayerfilmsfromsulfonatedmetal-free,sulfonatedcopper-,andsulfonatednickel-phthalocyanineswerefabricatedwithdiazoresinlayerbylayeronasubstrateviaelectrostaticinteractionbytheself-assemblytechnique.UnderUVirradiation,thelinkagenaturebetweenthelayersofthefilmisconvertedfromtheelectrostaticbondingtocovalentbonding.Thecovalentlyattachedmultilayerfilmsareverystabletowardspolarsolventsandsaltaqueoussolutions.Thephotovoltaicpropertiesofthecovalentlyattachedfilmcanbedeterminedbymeansofatraditionalthree-electrodephotoelectrochemicalcellinaqueoussolutionswithKCIasthesupportingelectrolyte.Thephotocurrentdeterminationhasshownthatthesulfonatedcopper-containingphthalocyaninefilmspossessahigherphotocurrentvaluethansulfonatedmetalfreeandsulfonatednickel-containingphthaloeyaninefilms.
简介:Thephotoacousticmodelofmultilayerwithastrong-absorbingsurfacelayerisdeveloped.Thephaseofph0toacoustiesignalismeasuredasafunctionofmodulatedfrequencyusingapparatustotallycontrolledbyacomputersystem.Thethermaldiffusivity,effusivityaswellasthicknessofseveralburiedlayersareobtainedindependentlythroughthebestfitofexperimentaldataaccordingtothetheoreticalmodel.Themultilayersofthinmetalandalloyfilmareinvestigated.Thismethodisprovedtobevaluableparticularlyinnondestructiveexaminationofsubsurfacephysicalproperties.
简介:Asamemberof1Dnanostructuredmaterials,theferromagneticandnonmagneticmultilayernanowiresexhibittremendouspotentialapplicationsinmanyfieldsduetotheiruniquemagneticandelectricalproperties.Thebasicpropertyofmultilayernanowirearrays,suchascoercivity,iscrucialimportantforthefutureapplication.Inordertoobtainthecoercivityinformation,besidesdirectlymeasuringitthroughexperiment,theoreticalcalculationalsoprovidesausefulandfastwaytoevaluatethemultilayer’scoervicity.Fig.1(a)and(b)demonstrateasinglemultilayernanowireandnanowirearraysembodiedinamatrix,respectively.Inthiswork,byimprovingPant’smodel,wedevelopedthenewmodelandsuccessfullypredictedtherelationshipbetweenthecoercivitychangingofCu/Nimultilayernanowirearraysandstructualparameters.Fig.
简介:Lightpropagationinnanoparticle-loadedencapsulantsissimulatedbasedonthemethodofMonteCarlo,referringtothemultilayergraded-refractive-indexstructureforLEDencapsulants.Andtheinfluenceofscatteringcoefficientonthetransmittanceisanalyzed.Theresultsshowthatthetransmittancedecreaseswithscatteringcoefficient.Foragivennumberoflayers,theencapsulantswillyieldmaximumtransmittanceiftherefractiveindexvalueofeachlayerisoptimized.Thenanoparticle-loadedencapsulantconsistsofmultiplelayerswithrefractive-indexvaluesthatgraduallydecrease.Thetransmittancewillbehigherthanthatoftraditionalnon-gradedencapsulants,andwillimprovelightextractionefficiencyofLED.
简介:多层的Nb2O5部nanoporous电影被控制阳极化过程成功地在包含4的乙烯乙二醇在Nb表面上综合?vol%HF并且2?vol%H2O2电解质。nanoporous电影被地排放扫描详细描绘电子显微镜学(FESEM),传播电子显微镜学(TEM),和X光检查衍射(XRD)。Nb2O5部nanoporous电影与~的方面墙厚度有多层的形态学5?nm,有~的一条直径的不规则的毛孔25?nm,并且一段多达7.39?m,取决于阳极化时间。为多层的Nb的机制<潜水艇class=“a-plus-plus”>2O<潜水艇class=“a-plus-plus”>5nanoporous形成也被讨论。这些nanoporous材料能在太阳能电池,煤气的传感器,催化剂,光过滤器,和电容器的地里是很有用的。
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简介:WehavedepositedW/Simultilayermirrorsusingthemagnetronsputteringunderthelowsputteringpressureandthehighmagneticfieldstrength,andmeasuredtheirreflectivtityinBeijingsynchrotronradiationfaciltiy,W/Simultilayershowthepeakreflectivityofapproximately10%ataphotonenergyof1200eVand10.5%ataphotoenergyof700eVrespectivelyattheincidenceangleof81°。
简介:Automobilecompaniesthatspendbillionsofdollarsannuallytowardswarrantycost,givehighprioritytowarrantyreductionprograms.Forecastingofautomobilewarrantyperformanceplaysanimportantroletowardstheseefforts.Theforecastingprocessinvolvespredictionofnotonlythespecificmonths-in-service(MIS)warrantyperformanceatcertainfuturetime,butalsoatfutureMISvalues.However,'maturingdata'(alsocalledwarrantygrowth)phenomenathatcauseswarrantyperformanceatspecificMISvaluestochangewithtime,makessuchaforecastingtaskchallenging.Althoughwarrantyforecastingmethodssuchaslog-logplotsanddynamiclinearmodelsappearinthispaperweuseanartificialneuralnetworkfortheforecastingofwarrantyperformanceinpresencetestingerrorsusingresponsesurfacemethodology.Thisapplicationshowstheeffectivenessofneuralphenomena.
简介:Inrecentyears,themagneticmultilayerednanomaterialshavebeenextensivelystudiedforelectronics[1],ultrahightensilestrength[2],highstoragemedia[3],andmicrowavedevices[4]sincethegiantmagnetoresistance(GMR)effectwasfoundin1988.Asamemberof1Dnanostructuredmaterials,theferromagneticandnonmagneticmultilayernanowiresalsoexhibittremendouspotentialapplicationsinmanyfieldsduetotheiruniquemagneticandelectricalproperties.Inthiswork,theCu/NimultilayernanowirearraysarepreparediniontracktemplatewithelectrodepositionmethodandanewfacilemethodisfirstintroducedtoeasilyconfirmthedifferentlayerthicknessandcomponentbyremovingthenonmagneticlayerofCu.
简介:Amultilayerflowisastratifiedfluidcomposedofafinitenumberoflayerswithdensitieshomogeneouswithinonelayerbutdifferentfromeachother.Itisanintermediatesystembetweenthesingle-layerbarotropicmodelandthecontinuouslystratifiedbaroclinicmodel.Sincethissystemcansimulatethebarocliniceffectsimply,itiswidelyusedtostudythelarge-scaledynamicprocessinatmosphereandocean.Thepresentpaperisconcernedwiththelinearstabilityofthemultilayerquasi-geostrophicflow,andtheassociatedlinearstabilitycriteriaareestablished.Firstly,thenonlinearmodelisturnedintotheformofaHamiltoniansystem,andabasicflowisdefined.ButitcannotbeanextremepointoftheHamiltonianfunctionsincethesystemisaninfinite-dimensionalone.Therefore,itisnecessarytoreconstructanewHamiltonianfunctionsothatthebasicflowbecomesanextremepointofit.Secondly,thelinearizedequationsofdisturbancesinthemultilayerquasi-geostrophicflowarederivedbyintroducinginfinitesimaldisturbancessuperposedonthebasicflows.Finally,thepropertiesofthelinearizedsystemarediscussed,andthelinearstabilitycriteriainthesenseofLiapunovarederivedundertwodifferentconditionswithrespecttocertainnorms.
简介:Multilayerblackphosphorus(BP)nanoplateletsofdifferentthicknesseswerepreparedbytheliquidphaseexfoliationmethodanddepositedontoyttriumaluminumgarnetsubstratestoformsaturableabsorbers(SAs).Thesewerecharacterizedwithrespecttotheirthickness-dependentsaturableabsorptionpropertiesat3μm.TheBP-SAswereemployedinapassivelyQ-switchedEr:Lu2O3laserat2.84μm.ByusingBPexfoliatedindifferentsolvents,stablepulsesasshortas359nsweregeneratedatanaverageoutputpowerofupto755mW.Therepetitionrateintheexperimentwas107kHz,correspondingtoapulseenergyof7.1μJ.TheseresultsprovethatBP-SAshaveagreatpotentialforopticalmodulationinthemid-infraredrange.
简介:劈啪作响的免职涂层在电子横梁(EB)上提供重要优点免职,包括的高收拾行李的密度,环境稳定性和极其低的损失。但是固有的高压缩的压力尽最大努力影响它的申请激光系统。这篇论文描述一篇小说扔的高损坏阀值激光镜子的技术可行性遥远的血浆劈啪作响技术。这种技术基于从目标遥远地产生集中的血浆然后有磁力地驾驶血浆到目标认识到劈啪作响的完整的制服。在目标电压和目标电流之间的伪独立提供我们很灵活的参数调节,特别为电影压力控制。免职条件被优化充分让步氧化并且低压缩压力单身者层HfO2和SiO2。为在1064nm的HfO2/SiO2激光镜子的43.8J/cm2的高损坏阀值被获得。第一次,劈啪作响的遥远的血浆成功地在与高效扔激光镜子被使用。
简介:OnaccountoftheexcellentmechanicalpropertiesofCrNfilmsuchasgoodwearandcorrosionresistance,andoxidizationatamuchhighertemperature,CrNfilmhasbeendemonstratedasoneofthebestcoatingsforenlargingthebearingatpresent.However,steelworkinglifespanatpresentt.However,withthemoreincreasinglyaggressiveoftheworkingenvironmentofmechanicalcomponents,especiallyforbearingsteel,newcoatingtechnologieswithamorebetterpropertiesofthetreatedpartssuchaswearandcorrosionresistancearerequired.