简介：TheGAuDIarchitectureandframeworkaredesignedtoprovideacomoninfrastructureandenvironmentforsimulation,filtering,reconstructionandanalysisapplications.InitiallydevelopedfortheLHCbexperiment,GAUDIhasbeenadoptedandextendedbytheATLASexperimentandadoptedbyseveralotherexperimentsincludingGLASTandHARP.wedescribethepropertiesandconceptsembodiedbyGAUDIandrecentfunctionalityadditionsandhowtheprojecthasevolvedfromaproductdevelopedbyatightly-knitteaminasinglesite,toacollaborationbetweenmultipleteamsatgeographicallydispersedsites,basedlooselyonopensourceconcepts.Wedescribethemanagementinfrastructureaswellashowweaccommodateexperment-specificextensionsandadaptationsaswellasanexperiment-neutralkernel.

简介：TheOnlinecomputingsystemfortheDZEROexperimentisusedtocontrolmonitor,andacquiredatafromtheapproximately1-millionchanneldetector,ThispaperdescribestheOnlineHostsystemeventdatapathrequirementsanddesign.

简介：StdHepC++[1]isaCLHEP[2]MonteCarloeventclasslibrarywhichprovidesacommoninterfacetoMonteCarloEventGenerators,ThisworkisanextensiveredesignoftheStdHepFortraninterfacetousethefullpowerofobjectorienteddesign,AgeneratedeventmapsnaturallyontotheDirectedAcyclicGraphconceptandwehaveusedtheHepMCclassestoimplementthis.Thefullimplementationallowstheusertocombineeventstosimulatebeampileupandaccessthemtransparentlyasthoughtheywereasingleevent.

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简介：CongestioncontrolforpacketssentonanetworkisimportantforDAQsystemsthatcontainaneventbuilderusingswitchingnetworktechnologies.QualityofService(QoS)isatechniqueforcongestioncontrol.RecentLinuxreleasesprovideQoSinthekerneltomanagenetworktraffic.Wehaveanalyzedthepacket-lossandpacketdistributionfortheeventbuilderprototypeoftheAtlasTDAQsystem.WeusedPC/LinuxwithGigabitEthernetnetworkasthetestbed.TheresultshowedthatQoSusingCBQandTBFeliminatedpacketlossonUDP/IPtransferwhiletheUDP/IPtransferinbesteffortmadelotsofpacketloss.TheresultalsoshowedthattheQoSoverheadwassmall.WeconcludedthatQoSonLinuxperformedefficientlyinTCP/IPandUDP/IPandwillhaveanimportantroleoftheAtlasTDAQsystem.

简介：Providingefficientaccesstomorethan300TBofexperimentdataistheresponsibilityoftheBaBar^1DatabasesGroup.Unlikegenerictools,TheEventBrowserpresentsuserswithanabstractionoftheBaBardatamodel.MultithreadedCORBA^2serversperformdatabaseoperationsusingsmalltransactionsinanefforttoavoidlockcontentionissuesandprovideadequateresponsetimes.TheGUIclientisimplementedinJavaandcanbeeasilydeployedthroughoutthecommunityintheformofawebapplet.Thebrowserallowsuserstoexaminecollectionsofrelatedphysicseventsandidentifyassociationsbetweenthecollectionsandthephysicalfilesinwhichtheyreside,helpingadministratorsdistributedatatoothersitesworldwide,ThispaperdiscussesthevariousaspectsoftheEventBrowserincludingrequirements,designchallengesandkeyfeaturesofthecurrentimplementation.

简介：TheneuralnetworkrealtimeeventselectionfortheDIRACewperimentatCERNispresented.Itcomprisesoftwoindependentparts.OneusesplasticscintillatorsandtheothertheverticalScintillatingFibres,Theglobaleventdecisionistakeninlessthan250ns.Signaleventsareselectedwithanefficiencyosmorethan0.99withabackgroundratereductionofabout2.

简介：离子光子排放显微镜学(IPEM)是新导致离子的排放显微镜学。它与高精力和在一件样品上侵犯的低fluence率采用一根宽广离子横梁。一个单个离子的位置被一个光系统与联合的客观透镜，棱柱，显微镜试管和充电检测设备(电荷耦合器件)。与Ag离子做的一部薄ZnS电影被用作光材料。在照耀的Cl离子创造的ZnS(Ag)电影的光子的产生效率和传播效率是计算的。一个单个Cl离子光显微镜的图象被高量效率电荷耦合器件观察。在这个IPEM系统给的一个单个Cl离子的分辨率是6m。影响分辨率的几个因素被讨论。一根硅二极管被用来收集事件离子引起的电的信号。光图象和电子信号的有效、意外的巧合被说明。单个事件效果的一张二维的地图根据有效巧合的数据被抽出。

简介：ThedataacquisitionsystemfortheCMSexperimentattheLargeHadronCollider(LHC)willrequirealargeandhighperformanceeventbuildingnetwork.Severalarchitecturesandswithchtechnologiesarecurrentlybeingevaluated.Thispaperdescribesdemonstratorswhichhavebeensetuptostudyasmall-scaleeventbuilderbasedonPCsemulatinghighperformancesourcesandsinksconnectedviaEthernetorMyrinetswitches.Resultsfromongoingstudies,includingmeasurementsonthroughputandscaling,arepresented.

简介：ThestudiesundertakentopreparetheTechnicalDesignReportoftheATLAS3^rdLevelTrigger(EventFilter)areperformedondifferentprototypesbasedondifferenttechnologies.wepresentherethemostrecentresultsobtainedforthesupervisionoftheprototypebasedonconventional,off-the-shelfPCmachinesandJavaMoblieagenttechnology.

简介：LinuxbasednetworkedPCsclustersarereplacingboththeVMEnonuniformdirectmemoryaccesssystemsandSMPsharedmemorysystemsusedpreviouslyfortheonlineeventfilteringandreconstrucion.ToallowanoptimaluseofthedistributedresourcesofPCclustersanopensoftwareframeworkispresentlybeingdevelopedbasedonadataflowparadigmforeventprocessing.Thisframeworkallowsforthedistributionofthedataofphysicseventsandassociatedcalibrationdatatomultiplecomputersfrommultipleinputsourcesforprocessingandthesubsequentcollectionoftheprocessedeventsatmultipleoutputs.Thebasisofthesystemistheeventrepository,basicallyafirst-infirst-outeventstorewhichmaybereadandwritteninamannersimilartosequentialfileaccess.Eventsarestoredinandtransferredbetweenrepositoriesassuitablylargesequencestoenablehighthroughput.Multiplereaderscanreadsimultaneouslyfromasinglerepositorytoreceiveeventsequencesandmultiplewriterscaninserteventsequencestoarepository,Hencerepositoriesareusedforeventdistributionandcollection.Tosupportsynchronisationoftheeventfolowtherepositoryimplementsbaaiers.Abarriermustbewrittenbyallthewritersofarepositorybeforeanyreadercanreadthebarrier,Areadermustreadabarrierbeforeitmayreceivedatafrombehindit.Onlyafterallreadershavereadthebarrieristhebarrieremovedfromtherepository.Abarriermayalsohaveattacheddata,Inthiswaycalibrationdatacanbedistributedtoallproessuingunits.Therepositoriesareimplementedasmulti-threadedCORBAobjectsinC++andCORMAisusedforalldatatransfers,JobsetupscriptsarewritteninpythonandinteractivestatusandhistogramdisplayisprovidedbyaJavaprogram.JobsrununderthePBSbatchsystemprovidingshareduseofresourcesforonlinetriggering,offlinemassreporcessinganduseranalysisjobs.

简介：ThispaperisdevotedtostudyingtheconformalinvarianceandNoethersymmetryandLiesymmetryofaholonomicmechanicalsystemineventspace.Thedefinitionoftheconformalinvarianceandthecorrespondingconformalfactorsoftheholonomicsystemineventspacearegiven.ByinvestigatingtherelationbetweentheconformalinvarianceandtheNoethersymmetryandtheLiesymmetry,expressionsofconformalfactorsofthesystemunderthesecircumstancesareobtained,andtheNoetherconservedquantityandtheHojmanconservedquantitydirectlyderivedfromtheconformalinvariancearegiven.Twoexamplesaregiventoillustratetheapplicationoftheresults.

简介：Thispaperpresentstwoapproachestoperformtheelectronicdeviceheatingduringradiationhardnessassurancetests.Commonlyusedconductiveheatingapproachiscomparedwithcontactlesslaser-basedapproach,characteristicsandlimitationsofthesemethodsaredescribed.Experimentalresultsfortemperaturedependenceofsingle-eventlatchup(SEL)cross-sectionduringheavyionirradiationalongwithsomeaspectsofphysics-basednumericalsimulationofheattransferprocessesarepresented.

简介：Inordertodeepentheunderstandingofthedifferencebetween0!1and1!0sinleeventupset(SEU)cross-sectioninanovelactivedelayelement(ADE)SRAM(StaticRandomAccessMemory)cell,theirradiationwascarriedoutatHeavyIonResearchFacilityinLanzhou(HIRFL).Usingthe86Kr26+ionsirradiatedthedeviceundertest(DUT)adoptedpartiallydepleted(PD)siliconofinsulator(SOI)technology.ThefeaturesizeofDUTfabricatedbyinstituteofmicroelectronic(IME)was180nm.TheschematicdiagramofSEUhardenADE-SRAMcellisshowninFig.1.TheADEisessentiallyaNMOSconnectedinonlyoneofthefeedbackpathsbetweenthetwoinventorsofthememorycell.Itplaysaroleasswitchingtransistor.Exceptduringawriteoperation,whentheswitchtransistoristurnedon(soasnottocompromisethewritespeed),theoff-ADEprovidesamuchgreaterRCdelaybetweenthetwoinventorsofthememorycelltoachievemuchimprovedSEUhardness[1].