学科分类
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500 个结果
  • 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。

  • 标签: 水晶的岩石 集体平衡原则 长石比例 活动方程 平衡温度
  • 简介:Usinganewlow-temperatureprocess(<600℃),thepoly-SiTFTwasfabricatedbymetal-inducedlateralcrystallization(MILC).Anultrathinaluminumlayerwasdepositedona-Sifilmandselectivelyformedbyphotolithography.Thefilmswerethenannealedat560℃toobtainlaterallycrystallizedpoly-Sifilm,whichisusedasthechannelareaofaTFT.Thepoly-SiTFTshowedanon/offcurrentratioofhigherthan1×106atadrainvoltageof5V.TheelectricalpropertiesaremuchbetterthanTFTfabricatedbyconventionalcrystallizationat600℃.

  • 标签: MILC 多硅TFT 晶体管 铝诱导
  • 简介:目前,关于防风林的保护的效果的大多数研究根据森林带和网络的二规模。与关于全球环境变化的进一步的研究,然而,更多的注意对防风林的地区性的气候效果被给予。在现在的学习,我们由使用陆地表面温度(LST)在地区性的规模分析了防风林的温度效果从在在到在2008的10月的从三月的中国的吉林省的Yushu,Nongan,Dehui,和Fuyu的中等决定成像分光辐射函数(MODIS)的数据。结果证明防风林能作为与没有防风林地区相比增加保护的农田的土壤温度,与0.57的增长吗?

  • 标签: MODIS数据 防护林带 土壤温度 区域尺度 中分辨率成像光谱仪 评估
  • 简介:Thereisawidespreadinterestinleadtelluride(PbTe)asagoodthermoelectricmaterial.WereportthetemperaturedependenceofthermopowerS(T)andresistanceR(T)forPbTeatthedifferentpressuresoffrom1.8GPato5GPaobtainedbyusingthecubicanvilhighpressureapparatus.Withincreasingpressure,R(T)andS(T)decrease.TheeffectofpressureonR(T)islargerthanthatonS(T).Thepowerfactorthatisdeterminedbythermopowerandresistivityincreaseswithincreasingpressure.Thismethodisanefficienttoolforsynthesizinggoodthermoelectricmaterialsathighpressureandhightemperature.

  • 标签: 铟-硅测量法 电学特征 PBTE 高压高温 热电材料
  • 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.

  • 标签: Chinese FIR dynamic VISCOELASTIC property time-temperature
  • 简介:Anumericalsimulationcodehasbeenestablishedwithparticlesimulationmethodinordertostudythegyro-kineticequationsfortheelectrostaticelectrontemperaturegradientmodesintoroidalplasmas.Theflowchartisgivenaswellforthecode.Thefourth-orderadaptivestep-sizeschemeisadopted,thatsavescomputertimeandissimple.Thecalculationcodeisusefulfortheresearchoftheelectrontemperaturegradientinstability.

  • 标签: 托卡马克 等离子体 电子温度梯度 不稳定性 粒子模拟
  • 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.

  • 标签: 温度场模型 制备工艺 钕铁硼粉末 熔纺 车轮速度 热传导问题
  • 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.

  • 标签: TEMPERATURE solid LUBRICANT SELF-LUBRICATING coating TRIBOLOGICAL
  • 简介:Adiode-pumpedalkalivaporlaser(DPAL)isoneofthemostpromisingcandidatesofthenext-generationhigh-poweredlasersource.Asthesaturatednumberdensityofalkalivaporishighlydependentonthetemperatureinsideavaporcell,thetemperaturedistributioninthecross-sectionofacellwillgreatlyaffectthehomogeneityofalasermediumandtheoutputcharacteristicsofaDPAL.Inthispaper,wedevelopedanalgorithmbasedontheregimeconcludingquasi-HilberttransformtoevaluatethephaseaberrationofawavefrontwhentheprobebeampassesthroughthevaporcellplacedinonearmofaMach–Zehnderinterferencesetup.Accordingtothetheoreticalalgorithm,wededucedthetemperaturedistributionofacesiumvaporcellfordifferentheatingconditions.Thestudyisthoughttobeusefulfordevelopmentofahigh-poweredlaser.

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  • 简介:Thetemperaturedependenceofcharacteristicsformultimodeinterference(MMI)based3-dBcouplerinsilicon-on-insulatorisanalyzed,whichoriginatesfromtherelativelyhighthermo-opticcoefficientofsilicon.Forrestrictedinterference3-dBMMIcoupler,theoutputpoweruniformityisideally0atroomtemperatureandbecomes0.32dBwhentemperaturerisesupto550K.Forsymmetricinterference3-dBMMIcoupler,thepoweruniformitykeepsideally0duetoitsintrinsicsymmetricinterferencemechanism.Withthetemperaturerising,theexcesslossofthebothdevicesincreases.TheperformancedeteriorationduetotemperaturevarietyismoreobvioustorestrictedinterferenceMMI3-dBcoupler,comparingwiththatofsymmetricinterferenceMMI3-dBcoupler.

  • 标签: 多模干扰 耦合器 硅上集成 热光学 波导
  • 简介:在现在的工作,在有限温度的decupletbaryons的群众用热QCD和规则被调查。在有限温度使用夸克增殖者,我们计算光谱到T8的功能命令到没有贡献,并且发现那光谱在T8顺序的功能和温度修正主要来自那包含的T4。计算在T=下面显示出群众的很小的温度依赖0.11GeV。当上面时那价值,群众与增加温度减少。结果显示强子夸克阶段转变温度可以是Tc为decupletbayons的0.11GeV。

  • 标签: QCD求和规则 有限温度 重子 依存性 夸克传播 温度修正
  • 简介:Themeasurementoflow-fieldsusceptibilityXasafunctionoftemperatureTforLa2/3Ca1/3MnO3showsasignificantdownturnin1/X(T)abovetheCurietemperatureTc,abehaviourgenerallyobservedinperovskitemanganites.Suchadownturnisarguedtobeduetothesegregationofferromagneticclusterswithlargerspinsintheparamagneticmatrix.Basedonthisconsideration,aphenomenologicalexpressionforX(T)isproposed,inwhichthetotalsusceptibilityisassumedtobeasumoftwosusceptibilitiesarisingfrommagneticentitiesinthePMbackgroundandtheFMclusterswithT-dependenteffectivespins,respectively.TheresultisingoodagreementwiththeexperimentaldataobtainedinLa2/3Ca1/3MnO3.

  • 标签: 抗磁化系数 居里温度 钙钛矿 亚锰酸盐
  • 简介:Bymeansofadoublemirrorinterferometryatwo-dimensionaltemperaturedistributionmeasurementinconvectivethermalboundarylayersispresented.Whenthecoldairflowsalongahotplatemodel,theinterferometricfringeinsidetheboundarylayerwillbend.Accordingtothedisplacementofthefringeandtherelationbetweentemperatureandindexofrefraction,atwo-dimensionaltemperatureprofileisobtained.Allisaccomplishedbyopticaldevicewiththehelpofmicro-computerwithoutanycontactwiththeflowfield.

  • 标签: BOUNDARY layer temperature distribution LASER INTERFEROMETRY
  • 简介:Tomakeitpossibleforthethermalwavetheoryontemperatureoscillation(TO)effectsinlivingtissuestobefoundedonthesubstantialexperimentalbasis,aseriesoftypicaldecisiveexperimentsinvivoaswellasinartificiallysimulatingcostructionswerecarredout.COnclusionsobtainedincludingsomeotherscholarsanimalexperimentalresultsallgreatlysupportthethermalwaveviewpointqualitatively,Afewexperimentalfactsusednottobeeasilyunderstoodfromtheclassicalviewpointarealsowellreinterpreted.TherevealingonthethermalwavemechanismsofTOinlivingtissuesisabrandnewdiscoveryanddeepinsightintothisimportantthermophysiologicalphenomenon,Itmaypossiblypromotenewinvestigationsonthecorrespondingtopicsinthefieldofbioheattransferscience.

  • 标签: 生物细胞 热传输 热生理学
  • 简介:Anovelsystemconfigurationoffiberopticsensorbasedonopticalabsorptionisproposed.Severalcompensationmeasuresarediscussed.Asimulatedexperimentisdesignedandtheoutputcurveofsystemisgiven.Theexperimentalresultshowsthatthesecompensationmeasuresareeffectiveondynamicdisturbanceswhicharecausedbybackgroundlightandopticalfiberbend,Inaddition,thedriftsinthelightsourceintensity,fiberlosses,andphotodetectorefficiencyareaslocompensated.

  • 标签: 砷化镓半导体 温度测量 光纤传感器 反射 补偿 温度传感器
  • 简介:高温度液体被注入微尺寸毛状并且它的轻繁殖行为被调查。我们集中于抽方法的二不同液体。第一个方法能把高温度液体听输入微尺寸由使用一个高压力差别系统毛状。在抽以后,与光搬运人一起连接的单个模式纤维(SMF)基于微波interferometry(OCMI)系统被用来测量不同液体听层次在微尺寸毛状。第二个方法能把房间温度引擎油输入由使用注射泵毛状。当液体被输入时,这个方法能避免空气水泡毛状。

  • 标签: 高温液体 毛细管 微尺度 光传输 差分系统 微波干涉仪
  • 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。

  • 标签: 联合模型简化的温室土壤温度湿度
  • 简介:Inthepresentpaper,weshallrigorouslyre-establishtheresultofthesingle-particlefunctionofaquantumdotsystematfinitetemperature.Unliketheproofgiveninourpreviouswork(Phys.Rev.B74195414(2006)),wetakeadifferentapproach,whichdoesnotexploittheexplicitexpressionoftheGibbsdistributionfunction.Instead,weonlyassumethatthestatisticaldistributionfunctionofthequantumdotsystemisthermodynamicallystable.Asaresult,weareabletoshowclearlythattheelectronicstructureinthequantumdotsystemiscompletelydeterminedbyitsthermodynamicstability.Furthermore,theweakerrequirementsonthestatisticaldistributionfunctionalsomakeitpossibletoapplythesamemethodtothequantumdotsystemsinnon-equilibriumstates.

  • 标签: 统计分布函数 有限温度 量子点 单粒子 系统 热力学稳定性
  • 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.

  • 标签: 可调谐激光 负介电常数 向列液晶 手性 温度 激光染料