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500 个结果
  • 简介:有温度分发上的放射效果的三维的Couette流动的理论分析被分析了,当在更低的静止的板的液体的注射是一条横向的正弦曲线时一个;它由通过上面的多孔的板的经常的吸的相应移动在一致运动。由于这类注射速度,流动变得三维。Prandtl数字的效果,放射参数;热转移的率上的注射参数被图的帮助检验了。Prandtl数字比注射或放射参数在温度分发上有大得多的效果。

  • 标签: 三维库爱特流动 温度分布 不可压缩流 传热 辐射效应 注入
  • 简介:在极的半导体量点(QD)的bipolaron的温度和LO声子效果被使用Tokuda学习修改线性联合的操作员方法和Lee-Low-Pines变化方法。为LO声子的吝啬的数字和bipolaron的有效的团的表情被导出。数字结果证明bipolaron的LO声子的吝啬的数字与与增加联合力量的电子声子增加在二个电子,而是增加之间的温度和相对距离r减少。bipolaronM的有效的团*当r更小时,与增加在二个电子之间的相对距离r很快增加,并且,它在那以后在r4.05rp到达最大值,M*与增加r慢慢地减少。bipolaronM的有效的团*与增加温度减少。显著地联合力量的电子声子影响LO声子和有效集体M的吝啬的数字的变化*与相对距离r和温度参数。

  • 标签: 半导体量子点 LO声子 双极化子 有效质量 温度参数 极性
  • 简介:Superoxidedismutase(草皮)是包括海洋的无脊椎动物在各种各样的有机体对反应的氧种类在抗氧化剂小径玩第一根防卫线的关键抗氧化剂酶。在那里主要存在二种特定的形式,Cu/Zn-SOD(SOD1)和Mn草皮(SOD2),在优核质。草皮被知道被许多环境stressors并发地调制。由使用中央合成试验性的设计和反应表面方法,关节水完成温度(18-34栠杩?潨潭潬祧眠瑩?湫睯?湩敶瑲'O慲整洠汵楴爭灥慥?琭票潭楳獮

  • 标签: 超氧化物歧化酶活性 铜离子浓度 近江牡蛎 温度 联合效应 铜锌超氧化物歧化酶
  • 简介:ThecombinationofSiCandandalusitewithcalciumaluminatebinderforcastablesinhighcorrosivegasifyingenvironmentsisapromisingalternativerefractorysystemformanydifferentslagsystems.Aftersintering,aglassyprotectivelayerhasbeenidentified.Besidetheinteractionsoftherefractorieswithintermediateslagalsothethermomechanicalproperties,thethermalshockperformanceandthemicrostructurehavebeenevaluatedasafunctionofdifferentbindersystems.

  • 标签: 碳化硅耐火材料 高温气化 红柱石 玻璃 应用 热机械性能
  • 简介:Anovelatmosphericplasmadevicedevelopedinthispaper,whichismoreeffectiveandconvenienttostudytheplasma-initiatedpolymerization(PIP)thanconventionalsetup.Thestructureandmechanismofthedeviceisintroduced.Someplasma-initiatedpolymerizationexperimentsarecarriedoutonthedevice,andtheconversionofAA(Acrylicacid)andAM(Acrylamide)atmospheric(N2)plasmapolymerizationarerespectively89%and94%after120hpostpolymerization,wherebyIRspectraoftheproduct(AA,AM).OurPIPresultareconfirmed.

  • 标签: 大气等离子体 聚合驱动 丙烯酸 丙烯氨
  • 简介:Thisstudyexaminestheimpactsofland-usedataonthesimulationofsurfaceairtemperatureinNorthwestChinabytheWeatherResearchandForecasting(WRF)model.InternationalGeosphere-BiosphereProgram(IGBP)land-usedatawith500-mspatialresolutionaregeneratedfromModerateResolutionImagingSpectroradiometer(MODIS)satelliteproducts.ThesedataareusedtoreplacethedefaultU.S.GeologicalSurvey(USGS)land-usedataintheWRFmodel.BasedonthedatarecordedbynationalbasicmeteorologicalobservingstationsinNorthwestChina,resultsarecomparedandevaluated.ItisfoundthatreplacingthedefaultUSGSland-usedataintheWRFmodelwiththeIGBPdataimprovestheabilityofthemodeltosimulatesurfaceairtemperatureinNorthwestChinainJulyandDecember2015.Errorsinthesimulateddaytimesurfaceairtemperaturearereduced,whiletheresultsvarybetweenseasons.Thereissomevariationinthedegreeandrangeofimpactsofland-usedataonsurfaceairtemperatureamongseasons.UsingtheIGBPdata,thesimulateddaytimesurfaceairtemperatureinJuly2015improvesatarelativelysmallnumberofstations,buttoarelativelylargedegree;whereasthesimulationofdaytimesurfaceairtemperatureinDecember2015improvesatalmostallstations,butonlytoarelativelysmalldegree(within1℃).MitigationofdaytimesurfaceairtemperatureoverestimationinJuly2015isinfluencedmainlybythechangeingroundheatflux.ThemodificationofunderestimatedtemperaturecomesmainlyfromtheimprovementofsimulatednetradiationinDecember2015.

  • 标签: surface air temperature land-use DATA NUMERICAL
  • 简介:Asimplifiedringcavityforachievingaunidirectionalroomtemperaturemulti-wavelengtherbium-dopedfiberringlaserwithoutopticalisolatorisdemonstrated.ThefiberringcavityisbuiltinsuchawaythattheopticalfieldspropagatingintwodirectionssufferdifferentlossescausedbyonesampledfiberBragggrating.Furthermore,simultaneousmulti-wavelengthlasingwith0.8-nmintervalsisdemonstratedwithsinusoidalphasemodulationjustbeforethesampledfiberBragggratingtopreventsingle-wavelengthlasingandunstablewavelengthoscillation.

  • 标签: 单向室温多波长铒掺杂光纤环激光器 光纤布拉格光栅 光学隔离器 光纤环形腔 输出功率
  • 简介:有表面结果的supercooled水微滴的碰撞一个目标在表面上创造冰生长。在任何冷环境的糖衣问题在预防和预言技术上在飞机,和很多研究上导致严重损坏因为糖衣到目前为止被进行了。因此,知道冻结supercooled水微滴的机制改进反的详细是很重要的--并且除冰的设备和糖衣模拟代码。影响目标表面的单个supercooled水微滴的糖衣机制将为目的给我们大卓见。在现在的学习,我们开发一种双光的成像技术测量在不同温度条件下面影响表面的supercooled水微滴的解决时间的温度。我们使用这种技术测量水微滴的准确温度,并且讨论结冰过程的详细。

  • 标签: 饱和温度 技术测量 过冷 结冰 发光 成像法
  • 简介:Toimprovetheprecisionofthecoilingtemperatureandtheperformanceofthefeedbackcontrolsystemwithlongpuretimedelayonhotstripmills,weanalyzedthedesignprocessoftheDahlinalgorithmindetail.ThecoilingtemperaturecurvescontrolledbythePIDalgorithmandDahlinalgorithmweresimulatedandcompared,whichshowedthatthecontrolprecisionwiththeDahlinalgorithmwashigherthanthatwiththePIDalgorithm.Thatwasfurtherverifiedbytheproductionpractice.

  • 标签: DAHLIN算法 反馈控制系统 卷取温度 热轧带钢 PID算法 应用
  • 简介:Anagrusnilaparvataeisthedominanteggparasitoidofriceplanthoppersandplaysanimportantroleinbiologicalcontrol.Symbioticbacteriacansignificantlyinfluencethedevelopment,survival,reproductionandpopulationdifferentiationoftheirhosts.TostudytheinfluenceoftemperatureonsymbioticbacterialcompositioninthesuccessivegenerationsofA.nilaparvatae,A.nilaparvataewereraisedunderdifferentconstanttemperaturesof22°C,25°C,28°C,31°Cand34°C.Polymerasechainreaction-denaturinggradientgelelectrophoresiswasusedtoinvestigatethediversityofsymbioticbacteria.OurresultsrevealedthattheendophyticbacteriaofA.nilaparvataewerePantoeasp.,Pseudomonassp.andsomeunculturedbacteria.ThebacterialcommunitycompositioninA.nilaparvataesignificantlyvariedamongdifferenttemperaturesandgenerations,whichmightbepartiallycausedbytemperature,feedingbehaviorandthephysicalchangesofhosts.However,theanalysisofwspgeneshowedthattheWolbachiainA.nilaparvataebelongedtogroupA,sub-groupMorsandsub-groupDro.Sub-groupMorswasabsolutelydominant,andthisWolbachiacompositionremainedstableindifferenttemperaturesandgenerations,exceptforthe3rdgenerationunder34°Cduringwhichsub-groupDrobecamethedominantWolbachia.Theaboveresultssuggestthatthecontinuoushightemperatureof34°CcaninfluencetheWolbachiacommunitycompositioninA.nilaparvatae.

  • 标签: TEMPERATURE Anagrus nilaparvatae WOLBACHIA bacterial community
  • 简介:Anewinstrumentforupperoceansurvey,namelytheUCTD(UnderwayConductivity-Temperature-Depth),whichcombinessomeoftheadvantagesofotherunderwayinstruments,isintroducedinthispaper.TheIntroductionsectionpresentsadescriptionoftheconstructionandfunctionoftheUCTD,andtheexperimentsconductedintheSouthChinaSeaonboardtheR/VDongFangHong2inJuly2007andAugust2008.TheUCTDsystem,withpressureandtemperaturesensorsintheprobe,iscon-venientlyportable,cost-effectiveandenvironment-friendly.Itishopefullysuitableforfuturecruises.AnintercomparisonbasedonregressingwiththeexperimenttemperaturedatafrombothSeaBirdplus911CTDandtheUCTDshowedthatthestandarddeviationis0.88℃andthecorrelationcoefficientis0.96,achievingthegoalssetforthecurrentoceanographyuses.Inthehydrodynamicexperiments,thedescendingvelocitiesanddepthswerecalculatedfordifferentshipspeeds.Apullingtestwasdesignedwithatensiometertomeasurethemagnitudeofthepull.Themaximaltensionofthelinewasfoundtobe66.2kg,whichisfarlowerthanthebearinglimitoftheHollowSpectraline.Finally,someimprovementsuggestionsareputforwardforfutureexperimentsandproduction.

  • 标签: 流体力学实验 电导率 原型制造 中国 海温 上层海洋
  • 简介:Lethaltemperaturetolerancewasdeterminedforabout8cm,age0Pseudosciaenacroceausingbothslowheatingandrapidtransferprotocol.Theacclimatizationtemperaturewas28℃withsummerseason,lethaltemperature(LT50value)ofslowheatingprotocol(CTMax)was35.0℃,andtheupperandlowerincipientlethaltemperaturesofrapidtransferprotocolwere34.2℃and17.5℃respectively.

  • 标签: 大黄花鱼 温度公差 生长环境 临界热量 海洋水温
  • 简介:AsoneofthekeyunitsofspaceCCDcamera,thetemperaturerangeandstabilityofCCDcomponentsaffecttheimage’sindexes.Reasonablethermaldesignandrobustthermalcontroldevicesareneeded.Onekindoftemperaturecontrolloopheatpipe(TCLHP)isdesigned,whichhighlymeetsthethermalcontrolrequirementsofCCDcomponents.InordertostudythedynamicbehaviorsofheatandmasstransferofTCLHP,particularlyintheorbitalflightcase,atransientnumericalmodelisdevelopedbyusingthewell-establishedempiricalcorrelationsforflowmodelswithinthreedimensionalthermalmodeling.Thetemperaturecontrolprincipleanddetailsofmathematicalmodelarepresented.Themodelisusedtostudyoperatingstate,flowandheatcharacteristicsbasedupontheanalysesofvariationsoftemperature,pressureandqualityunderdifferentoperatingmodesandexternalheatfluxvariations.TheresultsindicatethatTCLHPcansatisfythethermalcontrolrequirementsofCCDcomponentswell,andalwaysensuregoodtemperaturestabilityanduniformity.Bycomparisonbetweenflightdataandsimulatedresults,itisfoundthatthemodelistobeaccuratetowithin1℃.ThemodelcanbebetterusedforpredictingandunderstandingthetransientperformanceofTCLHP.

  • 标签: CCD相机 温度范围 控制回路 数值模拟 热管 空间