学科分类
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176 个结果
  • 简介:Asecondgenerationsolaradaptiveoptics(AO)systemisbuiltandinstalledatthe1-mNewVacuumSolarTelescope(NVST)oftheFuxianSolarObservatory(FSO)in2015.TheAOhigh-ordercorrectionsystemconsistsofa151-elementdeformablemirror(DM),acorrelatingShack–Hartmann(SH)wavefrontsensor(WFS)witha3500Hzframerate,andareal-timecontroller.ThesystemsawfirstlightonMar.16,2015.Thesimultaneoushigh-resolutionphotosphereandchromosphereimageswithAOareobtained.Theon-skyobservationalresultsshowthatthecontrastandresolutionoftheimagesareapparentlyimprovedafterthewavefrontcorrectionbyAO.

  • 标签: 自适应光学系统 太阳望远镜 天文台 抚仙湖 第二代 真空
  • 简介:BasedontheopticaldatafortransmittedradiationthroughseaiceintheArcticduringthelateautumnandearlywinterof2007,theauthorsstudiedthearrivingsolarradiation,reflectedradiationandtransmittedradiationunderverylowsolaraltitude.Throughtheatmosphere,thelightofthearrivingsolarradiationatshortwavelengthwasweakened,withthespectraldistributionofdoublepeakscenteredat490nmand683nm.Themagnitudeofthepeakat683nmevenexceededthatat490nmundertheverylowsolarradiationcondition.Thereflectionwaslowerthanthatinsummertimebecauseofthethinthicknessesoficeandsnow,allowinghigherratioofheattoentertheseaiceandsnow.Whenhigherratioofsolarradiationenteredseaiceinlateautumn,thenewicefreezingwouldbeaffected.Thespectralreflectivityfromsnowsurfacewasalmostaconstant,butthereflectionwithoutsnowde-creasedatlongerwavelengths.Inthetransmissionspectrum,thelightof490nmwasdominant.Itindicatesthattheradiationatlongerwavelengthwasweakenedbyseaice.Therefore,undertheconditionoflowsolaraltitude,theradiationatshorterwavelengthwasweakenedbytheatmospherewhiletheradiationatlongerwavelengthwasweakenedbytheseaice.Thecombinedeffectofat-mosphereandseaicemadethesolarradiationunderseaicemuchweaker.Theabsorptionofseaiceforthelonger-wavelengthradiationallowedtheseaicetogainmoreheattoslowdownthefreezingprocess.

  • 标签: 太阳高度 太阳辐射 穿透 海冰
  • 简介:Collectingwoodwasarealpaininthefore-head.Weusedtogototheforesttocollectwoodthirtytimesorsoeachwinterregardlessofthesnoworwind.Wehadtogetupanhourorsoaftermidnightandafterdoingourchoreswewouldheadofftotheforest.Wedidn’treturnuntildusk,"saidMs.Zhongcujia,aged52andaresidentofNiamuorFishVillage,locatedinJiancaCounty,MalhoTibetanAutonomousPrefecture,QinghaiProvince,China.FishVillageisnestledonadenud-edwest-facingmountainslope.

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  • 简介:Magnetohydrodynamicsisoneofthemajordisciplinesinsolarphysics.Vigorousmagnetohydrodynamicprocessistakingplaceinthesolarconvectionzoneandatmosphere.Itcontrolsthegeneratingandstructuringofthesolarmagneticfields,causestheaccumulationofmagneticnon-potentialenergyinthesolaratmosphereandtriggerstheexplosivemagneticenergyrelease,manifestedasviolentsolarflaresandcoronalmassejections.Nowadaysdetailedobservationsinsolarastrophysicsfromspaceandonthegroundurgeagreatneedforthestudiesofmagnetohydrodynamicsandplasmaphysicstoachievebetterunderstandingofthemechanismormechanismsofsolaractivity.Ontheotherhand,thespectacularsolaractivityalwaysservesasagreatlaboratoryofmagnetohydrodynamics.Inthisarticle,wereviewedafewkeyunresolvedproblemsinsolaractivitystudiesanddiscussedtherelevantissuesinsolarmagnetohydrodynamics.

  • 标签: 太阳活动 日冕物质抛射 等离子体物理 太阳大气 太阳物理学 天体物理学
  • 简介:Thetwo-streamapproximationisappliedtosolvethemultiplescatteredradiationtransferequationsforaninhomogeneousaerosolatmosphere.Theaccurateabsorptionofwatervapor,ozone,carbondioxideandmolecularoxygeniscalculated.Calculationshavebeencarriedoutbandbybandforthebeatingrateofatmosphere.Theresultsshowthattheeffectofaerosolsonsolarheatingoftheatmosphereissignificant.

  • 标签: AEROSOLS ozone INHOMOGENEOUS SOLAR BEATING heating
  • 简介:洛杉机设计工作室FELTMARK最近在KICKSTARTER上带来了名为'ELLUMSOLAR'的项目,一个不一般的智能灯具。选用硬白枫及黑胡桃制作,每个灯都呈片状,长宽与名片相近,方便作为移动光源随身携带、走哪用哪,同时它也配备有底座,可以通过内置磁铁固定在底座上作家居照明。虽然是小巧,但亮度足为作为台灯使用。这款灯通过太阳能面板无线充电,充满一次就可用六个月之久,由于LED灯板和太阳能面板一起巧妙地隐藏在底部,因此ELLUMSOLAR就有一个简洁和令人爱不释手的外观。除此外,它也是一款智能灯,既

  • 标签: Ellum SOLAR 灯具设计 太阳能面板 设计工作室 SOLAR
  • 简介:ZnTe/ZnTe∶Culayerisusedasacomplexbackcontact.TheparametersofCdTesolarcellswithandwithoutthecomplexbackcontactsarecompared.Theeffectsofun-dopedlayerthickness,dopedconcentrationandpost-depositionannealingtemperatureofthecomplexlayeronsolarcellsperformanceareinvestigated.TheresultsshowthatZnTe/ZnTe∶CulayercanimprovebackcontactsandlargelyincreasetheconversionefficiencyofCdTesolarcells.Un-dopedlayerandpost-depositionannealingofhightemperaturecanincreaseopenvoltage.Usingthecomplexbackcontact,asmallCdTecellwithfillfactorof73.14%andconversionefficiencyof12.93%isobtained.

  • 标签: 太阳能电池 碲化镉 CDTE 转换效率 复杂静合接点
  • 简介:RelationshipbetweenglobalseismicityandsolaractivitiesGUI-QINGZHANG(张桂清)BeijingAstronomicalObservatory,ChineseAcademyofScience...

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  • 简介:结合的基于聚合物的太阳能电池是寻找在最后一十年的持续、可更新的精力来源的最有希望的设备之一。它是最年轻的领域无机的太阳能电池研究并且目前也当然是最快的成长的。Inaddition,为基于聚合物的太阳能电池与的关键因素高效率是发明新材料。器官的太阳能电池在应用在制造和灵活性由于它的低费用吸引了重要研究和商业兴趣。然而,他们受不了相对低的变换效率。高效率聚合物太阳能电池技术的意义和概念的摘要被介绍。

  • 标签: 太阳能电池 高效聚合物 能量源 原料
  • 简介:Thepreparation,currentstatusandtrendsareinvestigatedforsiliconthinfilmsolarcells.Theadvantagesanddisadvantagesofamorphoussiliconthinfilm,polycrystallinesiliconthinfilmandmono-crystallinesiliconthinfilmsolarcellsarecompared.Thefuturedevelopmenttrendsarepointedout.Itisfoundthatpolycrystallinesiliconthinfilmsolarcellswillbemorepromisingforapplicationwithgreatpotential.

  • 标签: 硅薄膜 太阳能电池 基片 多晶硅
  • 简介:ALABORATORYTESTFACILITYFORSOLARRADIATIONINSTRUMENTSANDITSAPPLICATIONS¥LuWenhua(吕文华)andMoYueqin(莫月琴)ALABORATORYTESTFACILITYFOR...

  • 标签: 月琴
  • 简介:Theeffectofhydrogenpassivationonmulticrystallinesilicon(mc-Si)usedforsolarcellsisdescribed,andthemechanismofhydrogendiffusionandpassivationisalsoinvestigated.Then,thehydrogenpassivationprocessesappliedinindustriesandresearchlaboratoriesareintroduced.Finallytheexistingproblemsandtheprospectsofhydrogenpassivationarereviewed.

  • 标签: HYDROGEN PASSIVATION Mc-Si SOLAR CELLS
  • 简介:Thisstudydefinesandassessestheselectionciiteriaforsuitableparticulatematerialstobeusedinanupflowbubblingfluidizedbed(UBFB)ordenseup-flowpowdercirculationsystemforsolarenergycaptureandstorage.Themaincriteriaidentifiedarebasedonthethermophysicalandthermomechanicalproperties,attritionbehavior,andtheconsiderationsofhealthandenvironmentalhazardsofthecandidatepowders.Finally,acostcomparisonandtentativerankingofthedifferentcandidatepowdersispresentedinadditiontoaweightedscoring.Significantscoringdifferencescanbeobservedbetweenthevariousmaterials.Olivinepossessesthemostfavorablecharacteristicsandappearstobetheparticulatematerialofchoiceforsolid/gassuspensionheattransferfluids.

  • 标签: Concentrated SOLAR power Particle-in-tube RECEIVER PARTICLE