学科分类
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445 个结果
  • 简介:ThelateststepsinthesteadyevolutionoftheCERNComputerCentrehavebeentoreducethemultitudeofclustersandarchitecturesandtoconcentrateoncommodityhardware.AnactiveRISCdecommissioningprogramhasbeenundertakentoencouragemigrationtoLinux,andaprogramofmergingdedicatedexperimentclustersintolargersharedfacilitieshasbeenlaunched.Thispaperdescribestheseprogramsandtheexperiencesrunningtheresultantmulti-hundrednodesharedLinuxclusters.

  • 标签: 程序设计 RISC 商品硬件
  • 简介:1.IntroductionAnobviousimprovementindesigningandmanufacturingtransformershasbeenachievedsincetheapplicationofpartialdis-charge(PD)testonpowertransformerswasaccepted.ChineseNationalStandardhasstipulatedthatPDtestisaroutineitemfortransformerswithratedvoltage220kVandabove.Manytransform-

  • 标签: ROUTINE TRANSFORMER DESIGNING BRUSH otherwise installation
  • 简介:BilateralTransactionbetweenlargeusersandpowergenerationenterprisesisnotasimplereform.Itisanimportantstageinpowermarketrestructuringandwillgranttheelectricityuserstherightofserviceselection.Theimplementationofbilateraltransactionswillhelptoestablishthemultiplebuyers’marketstructure,reasonablepricemechanismandmarkettradingmechanism.Itisalsoanimportantapproachtoenhancethecompetitioninthemarketandimprovetheefficiencyofenergyresourceallocation.

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  • 简介:Oneofthesub-systemsoftheTrigger/DAQsystemofthefutureATLASexperimentistheOnlineSoftwaresystem.Itencompassesthefunctionalityneededtoconfigure,controlandmonitortheDAQ.ItsarchitectureisbasedonacomponentstructuredescribedintheATLASTrigger/DAQtechnicalproposal.ResularintegrationtestsensureitssmoothoperationintestbeamsetupsduringitsevolutionarydevelopmenttowardsthefinalATLASonlinesystem.Feedbackisreceivedandreturnedintothedevelopmentprocess.Studiesofthesystem.behaviorhavebeenperformedonasetofupto111PCsonaconfigurationwhichisgettingclosertothefinalsize,Largescaleandperformancetestsoftheintegratedsystemwereperformedonthissetupwithemphasisoninvestigatingtheaspectsoftheinter-dependenceofthecomponentsandtheperformanceofthecommunicationsoftware.Ofparticularinterestweretheruncontrolstatetransitionsinvariousconfigurationsoftheruncontrolhierarchy.Forthepurposeofthetests,thesoftwarefromotherTrigger/DAQsub-systemshasbeenemulated.Thispaperpresentsabriefoverviewoftheonlinesystemstructure,itscomponentsandthelargescaleintegrationtestsandtheirresults.

  • 标签: ATLAS实验 软件开发 脱机软件
  • 简介:在钨卤素灯的安排和晶片收到的发光的一致性之间的关系被讨论,并且一种axial-symmetricallamps-array被设计保证边上的照耀是近似一样的著名计算机生产厂商他晶片的中心上的。晶片对力量oftungsten卤素灯上的温度的大小数字地被计算。

  • 标签: 大直径晶片 快速热处理 钨卤素灯 退火处理
  • 简介:Accurateaerodynamicmeasurementsinthehypersonicflowoflargeaircraftmodelsintunnelshavepracticalsignificance,butposeasignificantchallenge.Novelaerodynamicforcemeasurementmethodshavebeenproposed,butlacktheoreticalsupport.Theformsoftheforcesignalstechniquesforsignalprocessingandcalculationofaerodynamicsareespeciallyproblematic.Atheoreticalstudyisconductedtoinvestigatethedynamicpropertiesbasedonmodelsofthedraw-rodsystemandslenderrods.Theresultsindicatethattheinertiaitemcanbeneglectedintherodgoverningequation;further,thesolutionsshowthatthesignalsofeachrodareacombinationofaerodynamicsignals(withaconstantvalue)andsinesignals,whichcanbeverifiedbyexperimentalshocktunnelresults.Signalprocessingandaerodynamicscalculationtechniquesarealsofoundtobeachievableviatheflatpartofthesignals.

  • 标签: 高超声速风洞 飞行器模型 气动测量 空气动力学计算 信号处理 计算技术
  • 简介:IntroductiontoHECHarbinElectricMachineryCompanyLimited(HEC)isapivotalcompanythatproduceslargeelectricmachineryandaccessorialcontrolequipmentinChina.ThehydrounitsmadebyHEChaveaccounted

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  • 简介:Electronicsystemswithlargestretchabilityhavemanyapplications.Apreciselycontrolledbucklingstrategytoincreasethestretchabilityhasbeendemonstratedbycombininglithographicallypatternedsurfacebondingchemistryandabucklingprocess.Thebuckledgeometrywasassumedtohaveasinusoidalform,whichmayresultinerrorstodeterminethestrainsinthefilm.Atheoreticalmodelispresentedinthislettertostudythemechanicsofthistypeofthinfilm/substratesystembydiscardingtheass...

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  • 简介:基于铁匠模糊的控制器,对大延期的不明确的网络能适应的一个新活跃队列管理(AQM)算法被介绍。它能在大延期引起的队列稳定性上补偿否定影响,并且它也在动态网络液体的条件下面维持强壮的坚韧性。它的稳定性通过Lyapunov方法被证明。模拟结果证明这个方法使队列长度能快速在预设价值收敛并且使队列摆动小,模拟结果也证明计划对在各种各样的网络条件和大延期下面的骚乱很柔韧并且,特别地当网络参数和网络延期变化时,建议的算法超过常规PI控制和模糊控制。关键词拥挤控制-大延期-活跃队列管理-史密斯预言者-模糊逻辑控制这个工作被中国(号码20020145007)的国家自然科学基础支持。殷凤杰在在1988设计邮电的长春研究所的部门的通讯收到了她的学士学位,在在1991的哈尔滨工学院的电力工程部门的硕士度,和在2006的东北大学的博士自动控制部门。她当前作为一个副教授在辽宁大学工作。她的研究兴趣包括网络拥挤控制,网络表演分析等等。YuanweiJING在1981在数学部门从辽宁大学收到了他的学士学位。他也分别地在1984和1988在东北大学的自动控制部门收到了硕士度和博士。作为一个医生以后的家伙,他在1996在圣徒西里尔和圣徒Methodius大学的电的工程师的学院工作了。从1998~1999,他是在密苏里堪萨斯城市大学的计算机科学电信的学院的一个高级访问学者。他当前作为博士候选人的一个教授和监督人在东北大学工作。他的研究兴趣包括复杂系统,电信控制,等等。龚元久在1986在北京大学的物理部门收到了他的学士学位,他当前作为一个教授在辽宁大学工作。他的研究兴趣包括通讯工程并且电子设计。

  • 标签: 不确定网络 大延迟 拥塞控制算法 模糊逻辑控制
  • 简介:Thesecurityofcivilengineeringisanimportanttaskduetotheeconomic,socialandenvironmentalsignificance.Comparedwithconventionalsensors,theopticalfibersensorshavetheiruniquecharacteristics.Beingdurable,stableandinsensitivetoexternalperturbations,theyareparticularinterestingforthelong-termmonitoringofcivilstructures.Focusisonabsolutemeasurementopticalfibersensors,whichareemergingfromthemonitoringlargestructural,includingSOFOsystem,F-Popticalfibersensors,andfiberBragggratingsensors.Theprinciple,characteristicandapplicationofthesethreekindsofopticalfibersensorsaredescribedtogetherwiththeirfutureprospects.

  • 标签: 光纤传感器 建筑监测 白光交叉相关器 Fizeau干涉仪 SOFO系统
  • 简介:Alargemagnetizedplasmasheetwithsizeof60cmx60cmx2cmwasgeneratedbyalinearhollowcathodedischargeundertheconfinementofauniformmagneticfieldgeneratedbyaHelmholtzCoil.Themicrowavetransmissioncharacteristicoftheplasmasheetwasmeasuredfordifferentincidentfrequencies,incaseswiththeelectricfieldpolarizationoftheincidentmicrowaveeitherperpendicularorparalleltothemagneticfield.Inthismeasurement,parametersoftheplasmasheetwerechangedbyvaryingthedischargecurrentandmagneticfieldintensity.Intheexperiment,upperhybridresonancephenomenawereobservedwhentheelectricfieldpolarizationoftheincidentwavewasperpendiculartothemagneticfield.Theseresonancephenomenacannotbefoundinthecaseofparallelpolarizationincidence.Thisresultisconsistentwiththeoreticalconsideration.Accordingtotheresonancecondition,theelectrondensityvaluesattheresonancepointsarecalculatedundervariousexperimentalconditions.Thiskindofresonancephenomenacanbeusedtodevelopaspecificmethodtodiagnosetheelectrondensityofthismagnetizedplasmasheetapparatus.Moreover,itispointedoutthattheoperatingparametersofthelargeplasmasheetinpracticalapplicationsshouldbeselectedtokeepawayfromtheupperhybridresonancepointtopreventsignalsfrompolarizationdistortion.

  • 标签: 等离子体片 混合共振 磁化 微波 体表 均匀磁场
  • 简介:OptimisinguseoftheWeb(WWW)forLHCdataanalysisisacomplexproblemandillustratesthechallengesarisingfromtheintegrationofandcomputationacrossmassiveampuntsofinformationdistributedworldwide.Findingtherightpieceofinformationcan,attimes,beextremelytime-consuming,ifnotimpossible,SO-calledGridshavebeenproposedtofacilitateLHCcomputingandmanygroupshaveembarkedonstudiesofdatareplication,datamigrationandnetwrokingplhilosophies.Otheraspectssuchastheroleofmoddleware'forGridsareemergingasrequiringresearch.Thispaperpositionstheneedforappropriatemiddlewarethatenablesuserstoresolvephysicsqueriesacrossmassivedatasets.Itidentifiestheroleofmeta-dataforqueryresolutionandtheimportanceofInformationGridsforhigh-energyphysicsanalysisratherthanjustcomputationalorDataGrids,ThispaperidentifiessoftwarethatisbeingimplementedatCERNtoenablethequeryingofverylargecollaboratingHEPdata-sets,initiallybeingemployedfortheconstructionofCMSdetectors.

  • 标签: 高能物理 物理数据库 信息网络
  • 简介:Aclassofnonlineardegeneratediffusionequationsisinvestigatedinthispaper.Itisshownthatthesolutionsconvergetothecorrespondingsimilarsolutionsast→+∞.TherateoftheconvergenceinL~1-normandL~--normareobtainedrespectively.

  • 标签: DEGENERATE converge proof oximate UNIFORMLY ARGUMENT
  • 简介:线电压落下的效果在负担上被认为更大,特别在在大轮船的力量系统的异步的马达,变压器和另外的非线性的负担参数上。基于改进节点电压,方法被建议的一个新奇功率流动方法,和一艘典型轮船驱动系统,它有2个发电站和10个节点,与靠近环的设计但是开环的操作,作为一个例子被拿。模拟结果证明改进力量流动计算方法完成了更高的精确性和更好的集中。关键词功率流动方法-节点电压方法-异步的马达-变压器基础条款:不到资助号码60704004由国家自然科学基础支持了。HaiLan在1975出生了。他是在设计大学的哈尔滨的一个副教授。他的当前的研究兴趣包括轮船力量系统分析,控制和模拟,等等。Jiu毒牙李在1980出生了。她是在设计大学的哈尔滨的一个研究生。她的当前的研究兴趣包括轮船功率系统控制,模拟,等等。张殿华在1981出生了。他是在设计大学的哈尔滨的一个研究生。他的当前的研究兴趣包括力量系统分析,模拟,等等。

  • 标签: 功率流方法 舰船电力系统 计算 节点电压法 船舶动力系统 异步电动机
  • 简介:InthefieldofComptonscatterimaging,theproblemofhowtogetameaningfulimagefromlarge-scaleobjectisstillnotfullysttled.Thedifficultymainlyliesinthemethodofthecompensationoftheattenuation,Basedontheprincipleofsmall-angleforwardscattering,anewattenuationcorrectionmethodisdeducedinthispaper,wecandistinguishairfromothermaterialsevenitisdeepinsidealarge-scaleobject.Toverifyourmethod,wedesignamodelofaone-meter-longobjectandperformMonteCarlosimulationswithMCNPsoftware.

  • 标签: 康普顿散射成象 电磁相互作用 MonteCarlo法
  • 简介:Thelargemethanolsynthesistowerindependentlydevel-opedbyHangzhouLindaChemicalTechnologyEngineer-ingCompanyaftersigningacontractinApril2008willbeappliedatthe600kt/amethanolprojectatNinxiaBaota

  • 标签: 甲醇 杭州 产业合作 技术交流
  • 简介:垂直地在免费表面上侵犯的一口2D槽喷气的流动特征被大埃迪模拟(LES)数字地与一个动态Sub-GridScale(SGS)模型一起调查。σ-坐标转变被介绍印射深度变量物理领域到一件深度制服计算领域。裂口操作员计划,把答案过程切成移流,散开和压力繁殖步,被采用解决即时速度和压力地。一个充分非线性的Lagrange-Euler方法被用来计算免费表面举起。数字结果证明喷气在Eestablished流动(ZEF)的地区保留你方类似,当喷气的骚乱逐渐地变从时对各向同性在表面冲击(ZSI)的地区各向异性。当喷气接近免费表面时,中心线速度很快减少并且流动被免费表面偏斜。二口对称的表面喷气在水平喷气(ZHJ)的地区被形成。超高的AnapproximateGuassian分发也在免费表面上被形成。Thecomputed结果在对可得到的试验性的数据的好同意。

  • 标签: 垂直射流 自由表面 数字研究 LES
  • 简介:Inthepaper,wegetthepreciseresultsofHájek-Rényitypeinequalitiesforthepartialsumsofnegativelyorthantdependentsequences,whichimprovetheresultsofTheorem3.1andCorollary3.2inKim(2006)andthestronglawoflargenumbersandstronggrowthratefornegativelyorthantdependentsequences.

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