学科分类
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102 个结果
  • 简介:不同尺寸的喷雾器被一个安德森空气刺绣花样收集观察黑碳(BC)的详细形态学与另外的伴随的喷雾器化学上被分开的喷雾器,用与一个精力DispersiveX光线分光计(SEM-EDX)装备的一台扫描电子显微镜。结果显示大多数BC喷雾器是在直径并且与同类的表面的大约50nm的球形的粒子。结果也证明这些粒子与另外的喷雾器或与自己一起聚集形成更大在测微计范围聚结。这些50-nmBC球形的粒子的形状被发现很类似于免除石油动力的车辆的内燃机的BCparticles的。这些球形的BCparticles被显示与发现帮助usingMatrix的激光解吸附作用/电离蒂米夫莱特·马斯·斯佩克特罗梅特里(MALDI-TOF-MS)的以前报导的fullerenes不同。

  • 标签: 大气粒子 纳米级颗粒 黑碳气溶胶 形态学 SEM-EDX
  • 简介:在这份报纸,我们从为在天体物理学测试买得起的无电荷的Grumiller黑洞(GBH)考虑相对论的HamiltonJacobi(HJ)方程和分级的粒子的学习兜售放射(HR)。当Rindler修改了SchwarzschildBH,它也被知道。我们的目的是调查Rindler参数的效果不仅一上兜售的温度(TH),但是检验是否在计算地平线温度和标准TH也。为这个目的,除了它的天真的坐标系统,我们在三个常规坐标系统上学习,它是Painlev

  • 标签: HAWKING辐射 黑洞 坐标系统 标量粒子 天体物理学 事件视界
  • 简介:Inthepast,peopledidnotrealizetheformationandstructureofgalaxies.Theyevenmistooktheblackholeshiddeninthecenterofagalaxyasindependentcelestialobjects,makingblackholesmysteriousandunbelievable.Itwasonlyaftertheauthorstudiedanddiscoveredthelawsoftheformationandevolutionofsatellites,planetsandstarsthatheputforwardthescientifictheoryofgalaxyformationandevolution,thereforerevealingthehierarchicalstructureofgalaxyandtheexistenceandcharacteristicsofblackholesasthemainnodesofgalacticstructure.

  • 标签: GALACTIC structure GALAXY FORMATION GALAXY EVOLUTION
  • 简介:我们在场有在非线性的electrodynamics的宇宙论的经常的Λ的常规黑洞的一个班。而不是在黑洞地平线后面的平常的奇特,所有领域和弯曲invariants为常规黑洞到处是常规的。通过计量器不变的途径,常规黑洞的线性地动态的稳定性被学习。在odd-paritysector,我们发现Λ术语不出现在不安的主人方程,常规黑洞在奇怪同等值的不安下面是稳定的whichshows。在另一方面为平同等值的部门,没有宇宙论的常数,主人方程是比盒子更复杂的。我们为常规黑洞的稳定性获得足够的条件。我们也调查常规黑洞的热力学的性质,并且发现那些热力学的数量不满足黑洞热力学的第一条法律的微分表格。为违背第一条法律的原因被揭示。

  • 标签: 规则黑洞 稳定性 热力学 宇宙常量 非线性电动力学 扰动方程
  • 简介:Ultrasound(US)-inducedcavitationisaneffectivewayinoxidizingorganiccontaminantsinwastewatereitherastheindependentoperationunitorincombinationwithotheroxidationmethods.Inthispaper,blackliquorandfiltrateafteracidifyingandsettlingweresonicated.Theeffectofworkingparametersonultrasonicdegradationofblackliquor,suchasdifferentcombinationmethods,frequency,powersupply,initialconcentration,pH,durationtime,ionicstrengthandcatalystwerestudied.Theresultswereasfollows:(1)Attheconditionsof40kHz,100W,4h,pHat6andtemperature30±2℃,utilizingUS/US-H2O2/US-Fenton,weak-orangefiltrateturnedtocolloidwiththeincreaseoftimeandlittlesedimentproducedaftersettling.EspeciallyfiltratecametobemilkwhitecollidesandupperwaterapproachedtonearlyachromaticbyUS-Fenton.ComparedwiththeUS,US-H2O2/US-FentonCOD(Chemicaloxidationdemand)removalratiocanincrease15%,30%respectively.Becauseofmorehydroxylradicalsproducedinthereactionprocess;(2)Attheconditionof100Wand4h,thedegradationefficiencyofblackliquorwasbetterat40kHzoverat20kHz.Moreoverblackliquorcanbebiodegradedeasily.Thosebasedonthatthebigmoleculeofcontaminantsinaqueoussolutioncanbechangedintothelittlemoleculewithultrasound(3)Attheconditionof40kHzand4h,theCODremovalratioofblackliquorwasmorehigherat60Wthanat80W,whiletheremovalratioofCODat60Wwasnearlyclosetotheratioat100W;(4)Theinitialconcentrationofblackliquorinfluencedtheeffectofsonochemicaldegradation;(5)ThevariationofpHhadnoeffectondegradation;(6)Thelongerthedurationtime,thegreatertheremovalratioofCOD.Butthisratioincreasedslowlyafter4h;(7)Adding0.2g/LNaCltochangetheionicstrengthoftheblackliquor,theCODremovalratiocanincrease10%;(8)ThedegradationratesincreasedbythecoexistentcatalystsofTiO2,Co2+andAg+.

  • 标签: 降解反应 超声辐射 有机污染物 废水处理 黑色液体 化学需氧量
  • 简介:Abstract.WeobtainaBlack-Scholesformulaforthearbitrage-freepricingofEu-ropeanCalloptionswithconstantcoefficientswhentheunderlylngstockgeneratesdividends.TohedgetheCalloption,wewillalwaysborrowmoneyfrombank.WeseetheinfluenceofthedividendtermontheoptionpricingviathecomparisontheoremofBSDE(backwardstochasticdi~erentialequation[5],[7]).WealsoconsidertheoptionpricingproblemintermsoftheborrowingrateRwhichisnotequaltotheinterestrater.ThecorrespondingBlack-Sdxolesformulaisgiven.Wenoticethatitisinfacttheborrowingratethatplaystheroleinthepricingformula.

  • 标签: 股票市场 股票分红 BLACK-SCHOLES模型 期权定价公式 数学模型 数理统计
  • 简介:ThispaperoutlinesthedesgnandprototypingoftheATLASHighLevelTrigger(HLT)wihchisacombinedeffortoftheDataCollectionHLTandPESA(PhysicsandEventSelectionArchitecture)subgroupswithintheATLASTDAQcollaboration.Twoimportantissues,alresdyoutlinedintheATLASHLT,DAQandDCSTechnicalProposal[1]willbehighlighted:thetreatmentoftheLVL2TriggerandEventFilterasaspectsofageneralHLTwithaviewtoeasiermigrationofalgorthmsbetweenthetwolevels;unificationoftheselectivedatacollectionforLVL2andEventBuilding.

  • 标签: ATLAS实验 高能级触发器 数据收集
  • 简介:TheALICEexperiment[1]attheLargeHadronCollider(LHC)atCERNwilldetectupto20,000particlesinasinglePb-Pbeventresultinginadatarateof-75MByte/event,Theeventrateislimitedbythebandwidthofthedatastoragesystem.Higherratesarepossiblebyselectinginterestingeventsandsubevents(HighLeveltrigger)orcompressingthedataefficientlywithmodelingtechniques.Bothrequireafastparallelpatternrecognition.OnepossiblesolutiontoprocessthedetectordataatsuchratesisafarmofclusteredSMPnodes,basedonoff-the-shelfPCs,andconnectedbyahighbandwidt,lowlatencynetwork.

  • 标签: ALICE实验 强子对撞机 触发系统
  • 简介:Energylevelstatisticsofasystemconsistingofsixparticlesinteractingbydeltaforceinatwo-jmodelcoupledwithadeformedcoreisstudiedinparticle-rotormodel.Forsingle-jshell(i13/2)andtwo-jshell(g7/2+d5/2)theexactenergiesforourstatisticalanalysisareobtainedfromafulldiagonalizationoftheHamiltonian,whileintwo-jcase(i13/2+g9/2)theconfigurationtruncationisused.Thenearest-neighbordistributionofenergylevelsandspectralrigidityarestudiedasthefunctionofspin.Theresultsofsingle-jshellarecomparedwiththoseintwo-jcase.Itisshowedthatthesystembecomesmoreregularwhensingle-jspace(i13/2)isreplacedbytwo-jshell(g7/2+d5/2)althoughthebasissizeoftheconfigurationspaceisunchanged.Thedegreeofchaoticityofthesystem,however,changesslightlywhenconfigurationspaceisenlargedbyextendingsingle-jshell(i13/2)totwo-jshell(i13/2+g9/2).

  • 标签: 多粒子系统 能级统计 粒子-转子模型 量子混沌
  • 简介:Thequantumnon-cloningtheoremisdiscussedforGarfinkle-Hornedilatonblackholes.Itisfoundthatiftheblackholecomplementarityprincipleiscorrect,thenitwillbequestionedwhetherthequantumnon-cloningtheoremiswellestablishedinsidetheinnerhorizon.ItisalsofoundthatanothercomplementarityprinciplemaybeneededinsidetheinnerhorizonoftheGarfinkle-Hornedilatonblackhole.

  • 标签: 量子信息测量 Garfinkle-Horne dilaton黑洞 类克尔黑洞 天体物理 天体测量
  • 简介:Weconductedmeasurementsofblackcarbon(BC)aerosolinJiaxing,ChinaduringautumnfromSeptember26toNovember30,2013.WeinvestigatedtemporalanddiurnalvariationsofBC,anditscorrelationswithmeteorologicalparametersandothermajorpollutants.ResultsshowedthathourlymassconcentrationsofBCrangedfrom0.2to22.0μg/m3,withanaverageof5.1μg/m3.ThediurnaivariationofBCexhibitedabimodaldistribution,withpeaksat07:00and18:00.Themorningpeakwaslargerthantheeveningpeak.ThemasspercentagesofBCinPM2.5andPM10were7.1%and4.8%,respectively.TheabsorptioncoefficientofBCwascalculatedtobe44.4Mm-1,whichaccountedfor11.1%ofthetotalaerosolextinction.BCwasmainlyemittedfromlocalsourcesinsouthwesternJiaxingwhereBCconcentrationsweregenerallygreaterthan11μg/m3duringthemeasurementperiod.CorrelationanalysisindicatedthatthemainsourcesofBCweremotorvehicleexhaust,anddomesticandindustrialcombustion.

  • 标签: 黑碳气溶胶 嘉兴 秋季 中国 质量浓度 可吸入颗粒物
  • 简介:TheentanglemententropyofanacousticblackholeinaBose–Einsteincondensates(BEC)isderived,whichisassociatedwiththephononsgeneratedviatheHawkingmechanisminasonichole.ConsideringthedispersionrelationofaBEC,werecalculatetheentanglemententropyoftheacousticblackholebymeansofstatisticalmethodintwolimits.Wefindthattheentropyisstillproportionaltotheareaofeventhorizon,butwithacoefcientdependentontheinfraredcutof.

  • 标签: 爱因斯坦凝聚 统计熵 黑洞 声学 玻色 色散关系
  • 简介:我们调查用HamiltonJacobi方法从一个五维的Lovelock黑洞兜售放射。放射的率的行为为紫外修正参数和宇宙论的常数的各种各样的值被阴谋。结果显示出那,由于紫外修正和宇宙论的常数代表的黑暗精力的存在,没有紫外修正或宇宙论的常数,黑洞与案例相比以更慢的率放射。而且,宇宙论的常数的存在在黑洞放射上做紫外修正的效果可以忽略。

  • 标签: 黑洞辐射 霍金辐射 五维 宇宙学常数 校正参数 雅可比方法
  • 简介:我们扩大张和赵“到有其Arnowitt-Deser-Misner集中的拓扑的缺点的黑洞的最近的工作不再是的s与它的集体参数相同。掘的行为巨大的粒子被调查,并且巨大的粒子越过黑洞的事件地平线在掘的排放率是计算的。结果与一个内在的单一的理论一致,并且拿象集体更少的粒子的一样的功能的形式。

  • 标签: 黑洞 拓扑效应 隧道效应 参数