简介:共存的作文,比例,和平衡温度在水晶的岩石中二长石对在petrogenesis的岩相学和解释的分类很重要。水晶的岩石通常由4-6矿物质(阶段)组成,取决于他们的独立化学部件和结晶化的平衡温度。一般来说,矿物质阶段的数字能被阶段规则决定。根据集体平衡原则,共存的体积作文二长石如果包含钙,钠,和钾氧化物的共存的mafic矿物质阶段的作文是坚定的,能从岩石的体积化学被评估,例如,由microprobe分析。作文,比例,和温度在平衡罐头二长石同时因此从岩石的体积作文数字地被解决,由合并这篇活动/作文,有团的第三的长石的关系平衡限制。在在这份报纸介绍的数字近似方法之上,长石组上的更好质量的、内部一致的数据能通常被获得,它将被期望在在岩石和创作矿物质的水晶的岩石,以及体积化学的系统的热力学的equilibria的考虑更现实主义、精确。
简介:Usinganewlow-temperatureprocess(<600℃),thepoly-SiTFTwasfabricatedbymetal-inducedlateralcrystallization(MILC).Anultrathinaluminumlayerwasdepositedona-Sifilmandselectivelyformedbyphotolithography.Thefilmswerethenannealedat560℃toobtainlaterallycrystallizedpoly-Sifilm,whichisusedasthechannelareaofaTFT.Thepoly-SiTFTshowedanon/offcurrentratioofhigherthan1×106atadrainvoltageof5V.TheelectricalpropertiesaremuchbetterthanTFTfabricatedbyconventionalcrystallizationat600℃.
简介:Thereisawidespreadinterestinleadtelluride(PbTe)asagoodthermoelectricmaterial.WereportthetemperaturedependenceofthermopowerS(T)andresistanceR(T)forPbTeatthedifferentpressuresoffrom1.8GPato5GPaobtainedbyusingthecubicanvilhighpressureapparatus.Withincreasingpressure,R(T)andS(T)decrease.TheeffectofpressureonR(T)islargerthanthatonS(T).Thepowerfactorthatisdeterminedbythermopowerandresistivityincreaseswithincreasingpressure.Thismethodisanefficienttoolforsynthesizinggoodthermoelectricmaterialsathighpressureandhightemperature.
简介:Time-temperaturesuperpositionprinciple(TTSP)wasusedtoexaminedynamicviscoelasticpropertiesofChineseFir(Cunninghamialanceolata)woodatanextremelylowmoisturecontent(0.6%).Storagemodulusandlossfactordatawereobtainedatdifferentconstanttemperaturesrangingfrom25℃to150℃infrequencymultiplexingexperiments(0.1-20Hz).Allviscoelasticcurvesatothertemperatureswereshiftedalongthelog-frequencyaxistosuperimposethemonareferencetemperature(i.e.135℃inthisstudy)curve.Theextendedstoragemodulusandlossfactorisothermalmastercurveswereoverawiderangeoffrequency.TheshiftfactorsweredeterminedtobeafunctionoftemperatureandfittedintotheArrheniusequationwiththeleastsquaresmethod.TheresultsshowedthatthestoragemodulusdatawereexcellentlyfittedintotheArrheniusmodel,indicatingthevalidityofthemodeltocharacterizethedynamicstiffnessbehaviorofdrywoodintherangeof25-150℃usingtheTTSP.However,thetime-temperatureequivalencewasnotabletopredictthedampingproperties.
简介:Anumericalsimulationcodehasbeenestablishedwithparticlesimulationmethodinordertostudythegyro-kineticequationsfortheelectrostaticelectrontemperaturegradientmodesintoroidalplasmas.Theflowchartisgivenaswellforthecode.Thefourth-orderadaptivestep-sizeschemeisadopted,thatsavescomputertimeandissimple.Thecalculationcodeisusefulfortheresearchoftheelectrontemperaturegradientinstability.
简介:Melt-spunribbonswhicharetheimportantrawmaterialforhot-deformedmagnetscanbepreparedbysingle-rollermelt-spinning.Inordertopreparewell-structuredribbons,themodeloftemperaturefieldforsingle-rollermelt-spinningprocesswasconstructedinthiswork.Theheatconductioninthisprocesswassimplifiedasonedimensionalheatconductionproblem.Itwasshownbymodelingthat,thetemperaturefieldinthemelt-spinningbeforesolidificationinthismodelcouldbedescribedasthisequationT(x,t)=Tmoexp[–k(x–x0)–k2αt]+T0.ThetemperatureT(x,t)ofthealloymeltsdecreasedwithincreasedpositionxandcoolingtimetexponentiallyfromthewheel-freesurfacetothewheel-sidesurface.TheconstantkdeterminedthedecreasespeedofalloytemperatureT(x,t),whichwasproportionaltotheinterfacialheattransfercoefficienthandtheinterfacialareaofheatconductionA0,butinverselyproportionaltothethermalconductivityK.x0wasthethicknessofthealloymelt.Withincreasedx0,thetemperaturedifferencebetweenwheel-freesurfaceandthewheel-sidesurfacebecamelarger,whichwouldleadtolargerdifferenceingrainsize.Inexperiments,theinfluenceofmelt-spinningprocessparametersonthetemperaturefieldmodelwasdiscussed,suchascoolingrollermaterials,wheelspeed,andsoon.Melt-spunribbonspreparedbysingle-rollermeltspinningatdifferentwheelspeedwereinvestigatedandmagneticpropertiesofdie-upsetmagnetsfrommelt-spunribbonsondifferentcoolingrollerwereanalyzed.Thevariationofgrainsizeinthedepthdirectionconsistedwithtemperaturefieldmodel.Thismodelprovideddirectionsforthepreparationofmelt-spunribbonswithuniformlydistributedfinegrains,whichwereverynecessaryforproducinghot-deformedmagnetswithhighmagneticperformance.
简介:Self-lubricatingcoatingshavebeenwidelyusedtoreducefrictioninmovingmachineassemblies.However,thetribologicalperformanceofthesecoatingsisstronglydependentontheservicetemperature.Inthispaper,anextensivereviewpertainingtotheinfluenceofoperatingservicetemperatureontribologicalperformanceofself-lubricatingcoatingshasbeencarriedout.Basedontheeffectivelubricatingtemperaturerange,theself-lubricatingcoatingsdevelopedinthepasthavebeendividedintothreegroups:lowtemperaturelubricantcoating(from-200℃toroomtemperature),moderatetemperaturelubricantcoating(fromroomtemperatureto500℃)andhightemperaturelubricantcoating(〉500℃).Ideasconcerningpossiblewaystoextendtheoperatingtemperaturerangeofself-lubricatingcoatingshavebeenpresentedasfollows:hybridizedtribologicalcoating,adaptivetribologicalcoatings,anddiffusionratelimitedsolidlubricantcoating,inaddition,anewself-lubricatingcoatingformulationforpotentialapplicationatawideoperatingtemperaturerangehasbeenproposed.
简介:Adiode-pumpedalkalivaporlaser(DPAL)isoneofthemostpromisingcandidatesofthenext-generationhigh-poweredlasersource.Asthesaturatednumberdensityofalkalivaporishighlydependentonthetemperatureinsideavaporcell,thetemperaturedistributioninthecross-sectionofacellwillgreatlyaffectthehomogeneityofalasermediumandtheoutputcharacteristicsofaDPAL.Inthispaper,wedevelopedanalgorithmbasedontheregimeconcludingquasi-HilberttransformtoevaluatethephaseaberrationofawavefrontwhentheprobebeampassesthroughthevaporcellplacedinonearmofaMach–Zehnderinterferencesetup.Accordingtothetheoreticalalgorithm,wededucedthetemperaturedistributionofacesiumvaporcellfordifferentheatingconditions.Thestudyisthoughttobeusefulfordevelopmentofahigh-poweredlaser.
简介:Thetemperaturedependenceofcharacteristicsformultimodeinterference(MMI)based3-dBcouplerinsilicon-on-insulatorisanalyzed,whichoriginatesfromtherelativelyhighthermo-opticcoefficientofsilicon.Forrestrictedinterference3-dBMMIcoupler,theoutputpoweruniformityisideally0atroomtemperatureandbecomes0.32dBwhentemperaturerisesupto550K.Forsymmetricinterference3-dBMMIcoupler,thepoweruniformitykeepsideally0duetoitsintrinsicsymmetricinterferencemechanism.Withthetemperaturerising,theexcesslossofthebothdevicesincreases.TheperformancedeteriorationduetotemperaturevarietyismoreobvioustorestrictedinterferenceMMI3-dBcoupler,comparingwiththatofsymmetricinterferenceMMI3-dBcoupler.
简介:Themeasurementoflow-fieldsusceptibilityXasafunctionoftemperatureTforLa2/3Ca1/3MnO3showsasignificantdownturnin1/X(T)abovetheCurietemperatureTc,abehaviourgenerallyobservedinperovskitemanganites.Suchadownturnisarguedtobeduetothesegregationofferromagneticclusterswithlargerspinsintheparamagneticmatrix.Basedonthisconsideration,aphenomenologicalexpressionforX(T)isproposed,inwhichthetotalsusceptibilityisassumedtobeasumoftwosusceptibilitiesarisingfrommagneticentitiesinthePMbackgroundandtheFMclusterswithT-dependenteffectivespins,respectively.TheresultisingoodagreementwiththeexperimentaldataobtainedinLa2/3Ca1/3MnO3.
简介:Bymeansofadoublemirrorinterferometryatwo-dimensionaltemperaturedistributionmeasurementinconvectivethermalboundarylayersispresented.Whenthecoldairflowsalongahotplatemodel,theinterferometricfringeinsidetheboundarylayerwillbend.Accordingtothedisplacementofthefringeandtherelationbetweentemperatureandindexofrefraction,atwo-dimensionaltemperatureprofileisobtained.Allisaccomplishedbyopticaldevicewiththehelpofmicro-computerwithoutanycontactwiththeflowfield.
简介:Tomakeitpossibleforthethermalwavetheoryontemperatureoscillation(TO)effectsinlivingtissuestobefoundedonthesubstantialexperimentalbasis,aseriesoftypicaldecisiveexperimentsinvivoaswellasinartificiallysimulatingcostructionswerecarredout.COnclusionsobtainedincludingsomeotherscholarsanimalexperimentalresultsallgreatlysupportthethermalwaveviewpointqualitatively,Afewexperimentalfactsusednottobeeasilyunderstoodfromtheclassicalviewpointarealsowellreinterpreted.TherevealingonthethermalwavemechanismsofTOinlivingtissuesisabrandnewdiscoveryanddeepinsightintothisimportantthermophysiologicalphenomenon,Itmaypossiblypromotenewinvestigationsonthecorrespondingtopicsinthefieldofbioheattransferscience.
简介:Anovelsystemconfigurationoffiberopticsensorbasedonopticalabsorptionisproposed.Severalcompensationmeasuresarediscussed.Asimulatedexperimentisdesignedandtheoutputcurveofsystemisgiven.Theexperimentalresultshowsthatthesecompensationmeasuresareeffectiveondynamicdisturbanceswhicharecausedbybackgroundlightandopticalfiberbend,Inaddition,thedriftsinthelightsourceintensity,fiberlosses,andphotodetectorefficiencyareaslocompensated.
简介:把没有庄稼植被,广泛地在国外被使用的平衡模型,温度和湿度在完整的照明回答联合温室土壤的模型的精力基于表面被建立。就在温室,弱太阳的放射和土壤的很少表面蒸发的相对关上的环境而言,在不同土壤层的水内容的每日的变化可以被忽视,然后,温度和湿度地联合模型被简化到一个一个维的热散开模型。简化模型和湿度地联合模型采用了土壤的一样的计算方法物理参数和热散开的分离格式微分方程,并且没有庄稼植被,在完整的照明在温室土壤被用于温度地的连续模拟。通过在模拟结果和试验性的数据之间的比较,简化模型的精确被验证。在24h周期的土壤热流动变化的典型规则也被获得。
简介:Inthepresentpaper,weshallrigorouslyre-establishtheresultofthesingle-particlefunctionofaquantumdotsystematfinitetemperature.Unliketheproofgiveninourpreviouswork(Phys.Rev.B74195414(2006)),wetakeadifferentapproach,whichdoesnotexploittheexplicitexpressionoftheGibbsdistributionfunction.Instead,weonlyassumethatthestatisticaldistributionfunctionofthequantumdotsystemisthermodynamicallystable.Asaresult,weareabletoshowclearlythattheelectronicstructureinthequantumdotsystemiscompletelydeterminedbyitsthermodynamicstability.Furthermore,theweakerrequirementsonthestatisticaldistributionfunctionalsomakeitpossibletoapplythesamemethodtothequantumdotsystemsinnon-equilibriumstates.
简介:Inthiswork,negativedielectricnematicliquidcrystalSLC12V620-400,chiraldopantS811,andlaserdyeDCMareusedtopreparedye-dopedchiralnematicliquidcrystallasersample.Inordertoinvestigatetemperature-tunablelasinginnegativedielectricchiralnematicliquidcrystal,wemeasurethetransmissionandlasingspectrumofthissample.Thephotonicbandgap(PBG)isobservedtoredshiftwithitswidthreducingfrom71.2nmto40.2nm,anditsshort-wavelengthbandedgemoves55.3nmwhilethelong-wavelengthbandedgeonlymoves24.9nm.Thewavelengthofoutputlaserisfoundtoredshiftfrom614.4nmat20°Cto662.8nmat67°C,whichisverydifferentfromthepreviousexperimentalphenomena.Therefractiveindices,parallelandperpendiculartothedirectorinchiralnematicliquidcrystalhavedifferentdependenciesontemperature.Theexperimentshowsthatthepitchofthischiralnematicliquidcrystalincreaseswiththeincreaseoftemperature.ThedecreaseinthePBGwidth,differentshiftsofbandedges,andtheredshiftoflaserwavelengtharetheresultsofrefractiveindiceschangeandpitchthermalelongation.