简介:ThechallengeofLHCcomputing,withdataratesintherangeofseveralPB/year,requiresthedevelopmentofGRIDtechnologies,tooptimizetheexploitationofdistributedcomputingpowerandtheauthomaticaccesstodistributeddatastorage.IntheframeworkoftheEU-DataGridproject,theALICEexperimentisoneoftheselectedtestapplicationsfortheearlydevelopmentandimplementationofGRIDServices.Presently,about15ALICEsitesaremakinuseofavailableGRIDtoolsandalargescaletestproductioninvolving9ofthemwascarriedoutwithoursimulationprogram.Resultsarediscussedindetail,aswellasfutureplans.
简介:CMSphysicistsneedtoseamlesslyaccesstheirexperimentaldataandresults,independentoflocationandstoragemedium,inordertofocusontheexplorationforthenewphysicssignalsartherthanthecomplexitiesofworldwidedatamanagement.Inordertoachievethisgoal,CMShasadoptedatieredworldwidecomputingmodelwhichwillincorporateemergingGridtechnology.CMShasstartedtouseGridtoolsfordataprocessing,replicationandmigration,ImportantGridcomponentsareexpectedtobedeliveredbytheDataGridprojects.likeprojects,CMShascreatedasetoflong-termrequirementstotheGridprojects.Theserequirementsarepresentedanddiscussed.
简介:Microgridsarelocalpowersystemsthatmayormaynotbeconnectedtothedistributionsystemandaretypicallycontrolledbythelocaloperator.Interestinmicrogridsisrisinganditislikelythatthenumberofmicrogridsconnectedtodistributionnetworkswillincrease.Currently,thereisnoconsensusonhowmicrogridswillinteractwiththedistributionsystem―theyhavethepotentialtothreatenstability,ortoassist.Howevermicrogrids,withtheiremphasisonsophisticatedcontrolinordertomanagetheirparticularchallenges,addressmanyoftheproblemsthatwillberequiredtoovercomeinrealizingthesmartgrid.Thispaperexaminessomeoftheissuesinvolvedinconnectingmicrogridstothedistributionnetworks,andillustrateshowmicrogridshaveakeyroletoplayinthedevelopmentofthesmartgrid.
简介:TheCMSexperimentattheCERNLHCcolliderisproducinglargeamountsofsimulateddatainordertoprovideanadequatestatisticfortheTriggerSystemdesign.Theseproductionsareperformedinadistributedenvironment,prototypingthehierarchicalmodelofLHCcomputingcentersdevelopedbyMONARC.AGRIDapproachisbeingusedforinterconnectingtheRegionalCenters.Themainissueswhicharecurrentlyaddressedare:automaticsubmissionofdataproductionrequeststoavailableproductioinsites,datatransferamongproductionsites,“best-replica”locationandsubmissionofenduseranalysisjobtotheappropriateRegionalCenter,Ineachproductionsitedifferenthardwareconfigurationsarebeingtestedandexploited.Furthermorerobustjobsubmissionsystems.whicharealsoabletoprovidetheneededbookkeepingoftheproduceddataarebeingdeveloped.BOSS(BatchObjectSubmissionSystem)isaninterfacetothelocalcomputingcenterschedulingsystemthathasbeendevelopedinordertoallowrecordinginarelationaldatabaseofinformationproducedbythejoberunningonthebatchfacilitiesAsummaryofthecurrentactivitesandaplanfortheuseofDataGridPM9toolsarepresented.
简介:TheInternettechnologyhasalreadychangedtheInformationSocietyinprofoundways,andwillcontinuetodoso.NowadaysmanypeopleforeseethatthereisasimilartrajectoryforthenextgenerationofInternet-GridTechnology.Asanemergingcomputationalandnetworkinginfrastructure,GridComputingisdesignedtoprovidepervasive,uniformandreliableaccesstodata,computationalandhumanresourcesdistributedinadynamic,heterogeneousenvironment.Ontheotherhand,thedevelopmentofGeographicInformationSystem(GIS)hasbeenhighlyinfluencedbytheevolutionofinformationtechnologysuchastheInternet,telecommunications,softwareandvarioustypesofcomputingtechnology.Inparticular,inthedistributedGISdomain,thedevelopmenthasmadesignificantimpactinthepastdecade.However,duetotheclosedandcentralizedlegacyofthearchitectureandthelackofinteroperability,modularity,andflexibility,currentdistributedGISstillcannotfullyaccommodatethedistributed,dynamic,heterogeneousandspeedydevelopmentinnetworkandcomputingenvironments.Hence,thedevelopmentofahighperformancedistributedGISsystemisstillachallengingtask.So,thedevelopmentofGridcomputingtechnologyundoubtedlyprovidesauniqueopportunityfordistributedGIS,andaGridComputingbasedGISparadigmbecomesinevitable.ThispaperproposesanewcomputingplatformbaseddistributedGISframework–theGridGeographicInformationSystem(G2IS).
简介:AnexclusiveinterviewwiththeauthorwaspublishedinIssue2,2010ofthisjournal,inwhichthestartingpointandmacro-strategytoconstructsmartgridinChinawaspresented.Meanwhile,thethreeperiodsofsmartgridconstructionwerealsomentioned,namelyplanningandpilotprojectconstructionperiod,overallconstructionperiod,andimprovingandupgradingperiodasitisplannedbySGCC.Attheinvitationofthisjournal,theauthorwroteanarticlefurtherintroducingtheimplementationinthefirstperiodofSGCCsmartgridprogram.Thearticlewillbepublishedintwoconsecutiveissues.
简介:The18monthssinceCHEP'2000haveseensignificantadvancesinGridcomputing,bothwithinandoutsidehighenergyphysics,Whileinearly2000,GridComputingwasanovelconceptthatmostCHEPattendeeswerebeingexposedtoforthefirsttime,wenowseeconsiderableconsensusonGridarchitecture,asolidandwidelyadopetedtechnologybase,majorfundinginitiatives,awidevarietyofprojectsdevelopingapplicationsandtechnologies,andmajordeploymentprojectsaimedatcreatingrobustGridinfrastructures,Iprovideasummaryofmajordevelopmentsandtrends,focusingontheGlobusopensourceGridsoftwareprojectandtheGriPhyNdatagridproject.
简介:IntroductionAnalysisandforecastofloadcharacteristicsareimportantaspectsinpowermarketanalysisandprediction.Correctlymasteringgridloadcharacteristics
简介:Spatialapplicationswillgainhighcomplexityasthevolumeofspatialdataincreasesrapidly.Asuitabledataprocessingandcomputinginfrastructureforspatialapplicationsneedstobeestablished.Overthepastdecade,gridhasbecomeapowerfulcomputingenvironmentfordataintensiveandcomputingintensiveapplications.Integratinggridcomputingwithspatialdataprocessingtechnology,theauthorsdesignedaspatialdataprocessinggrid(calledSDPG)toaddresstherelatedproblems.RequirementsofspatialapplicationsareexaminedandthearchitectureofSDPGisdescribedinthispaper.KeytechnologiesforimplementingSDPGarediscussedwithemphasis.
简介:Anewmethodforconstructingafittingsurfaceonatriangulargridispresented.Assumingimagesareobtainedbysamplingfromtheoriginalscene.Conventionalpolynomialinterpolationmethodsgenerallyconstructthefittingsurfaceonasquaregrid.Differentfromexistingmethods,thenewmethodconstructsthefittingsurfaceonatriangulargridwhichcandividetheoriginalsurfacemoredetailedandimproveapproximationaccuracy.Asthequalityoftheimageedgesplaysakeyroleinvisualeffectsofimage,thenewmethodusesimageedgesasconstraintstogetatrianglegrid.Thenewmethodconstructsacubicpolynomialpatchlocallyusingimagedatatoapproximatetheoriginalsurface.Experimentalcomparisonresultsofthenewmethodwithothermethodsshowthatthenewmethodcanproducehigh-qualityimagesandremovethezigzaggingartifact.
简介:Thispaperistoconstructa'digitallocal,regional,region'informationframeworkbasedonthetechnologyof'SIG'anditssignificanceandapplicationtotheregionalsustainabledevelopmentevaluationsystem.First,theconceptofthe'gridcomputing'and'SIG'isinterpretedanddiscussed,thentherelationshipbetweenthe'gridcomputing'and'digitalregion'isanalyzed,andtheframeworkofthe'digitalregion'isputforward.Finally,thesignificanceandapplicationof'gridcomputing'tothe'regionsustainabledevelopmentevaluationsystem'arediscussed.
简介:It'slearnedfromSGCCAnnualWorkConferencethatSGCCwillinvest301.9billionyuaninpowergrids,forthefirsttimetoexceed300billioninrecentyears.Griddevelopmentwillenteranewstagewiththeconstructionandoperationofalargenumberoftransmissionprojects,newenergygenerationdeliveryprojectsandleadingtechnologydemonstrationprojects.Amongthem,UHVtransmissionprojectshavebrokenmanyworldrecords,andhavegreatlyacceleratedChina'ssmartgridconstruction.
简介:Thesmartgridhasbeensuchahottopicrecently.Inthispaperthehottopicsinthisfield,suchasthedefinitionandfeaturesofsmartgrid,keytechnicalproblemstobeaddressedsuchasnewsystemcomponents,newtypesoftransducersandmeasurementtechnologies,advancedinterfaces,event-drivenfast-simulateddecision-makingandcoordination,andadaptivecontrol,etc.,anddifficultiesareanalyzedanddiscussed.
简介:Theelectricindustryisbeingtransformedfromacentralizednetworktoonethatislesscentralizedandallowsmoreconsumerinteractionintheformofasmartgrid.Thereisalsoastrongcommitmentbymostcountriestoreducegreenhousegasemissionsandglobalwarmingthroughtheuseofrenewableenergyresources.Thelocallyavailablerenewableresources,suchaswind,solar,tidal