简介:TheD0experiment'sdataandjobmanagementsystemsoftware,SAM,isanoperationalprototypeofmanyoftheconceptsbeingdevelopedforGridcomputing.WeexplainhowthecomponentsofSAMmapintotheDataGridarchitecture,WediscussthefutureuseofGridcomponentstoeitherreplaceexistingcomponentsofSAMortoextenditsfunctionalityandutility.owrkbeingcarriedoutaspartoftheParticlePhysicsDataGrid(PPDG)project.
简介:SAMisanetwork-distributeddatamanagementsystemdevelopedatFermilabforusewithRunIIdata,ItisbeingEmployedbytheD0Experimenttostore,manage,deliver,andtrackprocessingofalldata.Wedescribethedesignandfeaturesofthesystemincludingresourcemanagementanddatatransfermechanisms,WeshowtheoperationalexperienceD0hasaccumulatedtodateincludingdataacquisitionprocessing,andalllevelsofaccessanddelivery.Wepresentvariousconfigurationsofthesystemanddescribetheiruseinthecollaboration.
简介:∑∧sam具有较慢的收敛速度。K=O(1)时,在范数‖.‖∑下,∑的收敛速度为n-β/2,其中β=min(1,2-α),而∑∧sam则具有较慢的收敛速度n-β1/2。
简介:Oneofthekeycomponentsofanygridarchitectureismanagingcomputeandstorageresourcesandoptimizingtheirutilization.SAMhasimplementedfeaturesthatallowittoexercisea"fairshare"and"prioritized"policyamongmanygroupsofusers.Thegoalsareasfollows:1)implementthexperimentspoliciesforresourceusagebyresearchgroupandbydataaccessmode,and2)optimizetheresourceusagetomaximizetheoverallthroughputdefinedintermsofrealdataprocessingactivity,AtthelowestlevelofSAMarchitecture,calledthestation,theSAMsystemintegratesthedatadeliveryandcachemanagementwiththejobcontrolandschedulingofthebatchsystem.Atthesite-level,forexampleatFermilab,requestsfordatafromon-sitestationsaremanagedtooptimizeMassStorageSystemresourcesandnetworkthroughput,Managementofresourcesatavariousgeographiclevelsarediscussed.
简介:Inordertomakeamoreeffectiveuseofthedatafromregionaldigitalseismographnetworksandtopromotethestudyonshearwavesplittinganditsapplicationtoearthquakestressforecasting,SAMsoftwaresystem,i.e.,thesoftwareonsystematicanalysismethodofshearwavesplittinghasbeendeveloped.Thispaperintroducesthedesignaims,systemstructure,functionandcharacteristicsabouttheSAMsoftwaresystemandshowssomegraphicalinterfacesofdatainputandresultoutput.Lastly,itdiscussespreliminarilythestudyofshearwavesplittinganditsapplicationtoearthquakeforecasting.
简介:ALIZEXOLA.ANOVELPROTOSTANETYPEOFTRITERPENEFROMALISMAORIENTALIS(SAM).JUZEP¥LUZENG;XIANPENANDRUYIZHANG(DepartmentofPhytochemist...