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。
简介:ThecombinationofSiCandandalusitewithcalciumaluminatebinderforcastablesinhighcorrosivegasifyingenvironmentsisapromisingalternativerefractorysystemformanydifferentslagsystems.Aftersintering,aglassyprotectivelayerhasbeenidentified.Besidetheinteractionsoftherefractorieswithintermediateslagalsothethermomechanicalproperties,thethermalshockperformanceandthemicrostructurehavebeenevaluatedasafunctionofdifferentbindersystems.
简介:Anovelatmosphericplasmadevicedevelopedinthispaper,whichismoreeffectiveandconvenienttostudytheplasma-initiatedpolymerization(PIP)thanconventionalsetup.Thestructureandmechanismofthedeviceisintroduced.Someplasma-initiatedpolymerizationexperimentsarecarriedoutonthedevice,andtheconversionofAA(Acrylicacid)andAM(Acrylamide)atmospheric(N2)plasmapolymerizationarerespectively89%and94%after120hpostpolymerization,wherebyIRspectraoftheproduct(AA,AM).OurPIPresultareconfirmed.
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.
简介:Asimplifiedringcavityforachievingaunidirectionalroomtemperaturemulti-wavelengtherbium-dopedfiberringlaserwithoutopticalisolatorisdemonstrated.ThefiberringcavityisbuiltinsuchawaythattheopticalfieldspropagatingintwodirectionssufferdifferentlossescausedbyonesampledfiberBragggrating.Furthermore,simultaneousmulti-wavelengthlasingwith0.8-nmintervalsisdemonstratedwithsinusoidalphasemodulationjustbeforethesampledfiberBragggratingtopreventsingle-wavelengthlasingandunstablewavelengthoscillation.
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简介:Toimprovetheprecisionofthecoilingtemperatureandtheperformanceofthefeedbackcontrolsystemwithlongpuretimedelayonhotstripmills,weanalyzedthedesignprocessoftheDahlinalgorithmindetail.ThecoilingtemperaturecurvescontrolledbythePIDalgorithmandDahlinalgorithmweresimulatedandcompared,whichshowedthatthecontrolprecisionwiththeDahlinalgorithmwashigherthanthatwiththePIDalgorithm.Thatwasfurtherverifiedbytheproductionpractice.
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.
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.
简介:Lethaltemperaturetolerancewasdeterminedforabout8cm,age0Pseudosciaenacroceausingbothslowheatingandrapidtransferprotocol.Theacclimatizationtemperaturewas28℃withsummerseason,lethaltemperature(LT50value)ofslowheatingprotocol(CTMax)was35.0℃,andtheupperandlowerincipientlethaltemperaturesofrapidtransferprotocolwere34.2℃and17.5℃respectively.
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简介:AsoneofthekeyunitsofspaceCCDcamera,thetemperaturerangeandstabilityofCCDcomponentsaffecttheimage’sindexes.Reasonablethermaldesignandrobustthermalcontroldevicesareneeded.Onekindoftemperaturecontrolloopheatpipe(TCLHP)isdesigned,whichhighlymeetsthethermalcontrolrequirementsofCCDcomponents.InordertostudythedynamicbehaviorsofheatandmasstransferofTCLHP,particularlyintheorbitalflightcase,atransientnumericalmodelisdevelopedbyusingthewell-establishedempiricalcorrelationsforflowmodelswithinthreedimensionalthermalmodeling.Thetemperaturecontrolprincipleanddetailsofmathematicalmodelarepresented.Themodelisusedtostudyoperatingstate,flowandheatcharacteristicsbasedupontheanalysesofvariationsoftemperature,pressureandqualityunderdifferentoperatingmodesandexternalheatfluxvariations.TheresultsindicatethatTCLHPcansatisfythethermalcontrolrequirementsofCCDcomponentswell,andalwaysensuregoodtemperaturestabilityanduniformity.Bycomparisonbetweenflightdataandsimulatedresults,itisfoundthatthemodelistobeaccuratetowithin1℃.ThemodelcanbebetterusedforpredictingandunderstandingthetransientperformanceofTCLHP.