简介：Inthispaperwedescribeamulti-gridalgorithmformixedproblemswithpenaltybythelinearfiniteelementapproximation.Itisprovedthattheconvergencerateofthealgorithmisboundedawayfrom1independentlyofthemeshsize.Forconvenience,weonlydiscussJacobirelaxationassmoothingoperatorindetail.

简介：非线性的反应散开方程的扩展混合有限元素近似被讨论。这里考虑的方程被用来为hydrologic和bio-geochemical现象建模。线性化混合方法方程，我们使用包含一个小非线性的系统在上的一个二格子的方法一粗糙尺寸H和一个线性系统系好尺寸h的一个好格子。错误估计被导出它证明错误是O(t+hk+1+H2k+2?d/2)(k1)，在k是的地方，为主要变量和d的接近的空间的度是空间尺寸。上述估计为为粗糙的格子问题决定适当H是有用的。

简介：Performancecomparisonsarecomposedoftwoparts:thefirstpartcontainsthesystematicallyinvestigationofsixdifferenceschemesincludingCDS,FUDS,HDS,PLDS,SUDSandQUICKforconvectiontermsinnumericalfluidflowandheattransferbasedonthefinitevolumemethodusingstaggeredandRhie-Chow'smomentuminterpolationcollocatedgrids,thesecondpartcontainsthecomparativecomputationsbeingconductedonRhie-Chow'smomentuminterpolationcollocatedgridandThiart'sfinitedifferenceschemebasednonstaggeredgrid.Three3-Dcasesthathaveanalyticalorbechmarksolutionsareadopted.FortheFirstpart,theresultsofcomputationsindicatethat,allthesixschemeshavethesamenumericalaccuracywhenthediffusiontermisredominant,Withtheincreaseofconvection,theFUDS,HDSandPLDSalmosthavethesameaccuracyintwoofthosegridsystems,whiletheSUDSandQUICKhavehigheraccuracythantheformer,TheaccuracyofCDSissomethinginbetween,Forthesamunder-relaxationfactorsandconvergencecriterion,theconvergencerateofeachschemeonthosetwogridsystemsarenearlbyequalwiththatonthestaggeredgridbeingalittlebitfaster.ForQUICKandCDS,smooth,non-oscillatingsolutionscanbeobtaninedgridbeingalittlebitfaster,ForQUICKandCDS,smooth,non-oscillatingsolutionscanbeobtainedevenwhenlocalPecletnumbermaybeaslargeas31.2-31.3,Forthesecondpart,itisconcludedthatsimplifiedcollocatedgridsystemispreferablefromnumericalaccuracy,gridPecletnumberlimit,sensitivitytotheunderrelaxationfactorandthefreedominchoosingfinitedifferenceschemeforconvectionterm.

简介：Theexponentiallyexpandedspacegridwasincorporatedintothenetworkapproachtoovercometheproblemoflowsimulationefficiencyduringthesimulationsofelectrochemicalproblemswithstiffkineticsorwidedlsperslonofdiffusioncoefficients,resultinginaneffectiveelectrochemicalsimulationmethod:exponentiallyexpandedgridnetworkapproach(EEG-NA).ThestabilityandaccuracyoftheEEGNAforthesimulationofvariouselectrodeprocesses.coupledwithdifferenttypesofhomogeneousreactionswereinvestigated.

简介：ResourcesonacomputationalGridaregeographicallyistributed,heterogeneousinnature,ownedbydifferentindividualsororganizationswiththeirownschedulingpolicies,havedifferentaccesscostmodelswithdynamicallyvaryingloadsandavailabilityconditions.Thismakertraditionalapproachestoworkloadmanagement,loadbalancingandschedulinginappropriate.Thefirstworkpackage(WP1)oftheEU-fundedDataGridprojectisadddressingtheissueofoptimzingthedistributionofjobsontoGridresourcesbasedonaknowledgeofthestatusandcharacteristicsoftheseresourcesthatisnecessarilyout-of-date(collectedinafiniteamonutoftimeataverylooselycoupledsite).WedescribetheDataGridapproachinintegratingexistingsoftwarecomponents(fromCondor,GGlobus,etc.)tobuildaGridResourceBroker,andtheearlyeffortstodefineaworkableschedulingstrategy.

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简介：Thispaperdiscussestheapplicationsofahybridmulti-agentframeworkforself-healingapplicationsinanintelligentsmartgridsystemfollowingcatastrophicdisturbancessuchaslossofgeneratorsorduringsystemfault.Theproposedhybridmulti-agentframeworkisahybridofbothcentralizedanddecentralizedschemetoallowdistributedintelligentagentinthesmartgridsystemtomakefastlocaldecisionwhileallowingtheslowercentralcontrollertojudgetheeffectivenessofthedecisionmadebythelocalagentsandtosuggestmoreoptimalsolutions.

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简介：Arightannualcycleisofcriticalimportanceforamodeltoimproveitsseasonalpredictionskill.ThisworkassessestheperformanceoftheGrid-pointAtmosphericModelofIAPLASG(GAMIL)inretrospectivepredictionoftheglobalprecipitationannualmodesforthe1980-2004period.Theannualmodesaregaugedbyathree-parametermetrics:thelong-termannualmeanandtwomajormodesofannualcycle(AC),namely,asolstitialmodeandanequinoctialasymmetricmode.TheresultsdemonstratethattheGAMILone-monthleadpredictionisbasicallyabletocapturethemajorpatternsofthelong-termannualmeanaswellasthefirstACmode(thesolstitialmonsoonmode).TheGAMILhasdeficienciesinreproducingthesecondACmode(theequinoctialasymmetricmode).ThemagnitudeoftheGAMILpredictiontendstobegreaterthantheobservedprecipitation,especiallyintheseaareasincludingtheArabianSea,theBayofBengal(BOB),andthewesternNorthPacific(WNP).Thesebiasesmaybeduetounderestimationoftheconvectiveactivitypredictedinthetropics,especiallyoverthewesternPacificwarmpool(WPWP)anditsneighboringareas.Itissuggestedthatamoreaccurateparameterizationofconvectioninthetropics,especiallyintheMaritimeContinent,theWPWPanditsneighboringareas,maybecriticalforreproducingthemorerealisticannualmodes,sincetheenhancementofconvectiveactivityovertheWPWPanditsvicinitycaninducesuppressedconvectionovertheWNP,theBOB,andtheSouthIndianOceanwheretheGAMILproducesfalselyvigorousconvections.MoreeffortsareneededtoimprovethesimulationnotonlyinmonsoonseasonsbutalsointransitionalseasonswhenthesecondACmodetakesplace.Selectionoftheone-tierorcoupledatmosphere-oceansystemmayalsoreducethesystematicerroroftheGAMILprediction.TheseresultsoffersomereferencesforimprovementoftheGAMILseasonalpredictionskill.

简介：为了避免处理零动力学限制，通过紧接的变换器由双向力量流动引进了一个二倍地喂的风发电机，一为格子方面变换器的新基于精力的建模和控制途径被介绍。在当模特儿的进程期间，格子方面变换器与反馈互联结构被划分成二个分系统，并且模型的交互矩阵考虑具体端口结构。然后，一个基于精力的控制器被建议基于新模型认识到格子方面控制目的。模拟研究在MATLAB/Simulink被执行。在比例积分的控制器和基于精力的控制器之间的比较结果证明一个人能更快获得的后者负担水流变化的集中率和全球稳定性。而且，当与随机的风在2MW风精力变换系统模仿了时，基于精力的控制器为格子方面控制也是能干的。

简介：Thispaperdiscussesadistributeddecisionprocedurefordeterminingtheelectricitypriceforareal-timeelectricitymarketinanenergymanagementsystem.ThepricedecisionalgorithmproposedinthispaperderivestheoptimalelectricitypricewhileconsideringtheconstraintsofalinearizedACpowergridmodel.Thealgorithmisbasedonthepowerdemand-supplybalanceandvoltagephasedifferencesinapowergrid.Inordertodeterminetheoptimalpricethatmaximizesthesocialwelfaredistributivelyandtoimprovetheconvergencespeedofthealgorithm,theproposedalgorithmupdatesthepricethroughthealternatingdecisionmakingofmarketparticipants.Inthispaper,weshowtheconvergenceofthepricederivedfromourproposedalgorithm.Furthermore,numericalsimulationresultsshowthattheproposeddynamicpricingmethodologyiseffectiveandthatthereisanimprovementintheconvergencespeed,ascomparedwiththeconventionalmethod.

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简介：Thethree-dimensionalNavier-Stokesequationsweresolvedwiththefractionalstepmethodwherethehydrostaticpressurecomponentwasdeterminedfirst,whilethenon-hydrostaticcomponentofthepressurewascomputedfromthepressurePoissonequationinwhichthecoefficientmatrixispositivedefiniteandsymmetric.Theeddyviscositywascalculatedfromtheefficientk-εturbulencemodel.TheresultingmodeliscomputationallyefficientandunrestrictedtotheCFLcondition.Computationswithandwithouthydrostaticapproximationwerecomparedforthesamecasestotestthevalidityoftheconventionalhydrostaticpressureassumption.Themodelwasverifiedagainstanalyticalsolutionsandexperimentaldata,withexcellentagreement.

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简介：铸造中国自主品牌北大方正集团由北京大学1986年投资创办。二十年来，坚持持续不断地技术创新，在中国IT产业发展进程中占据着重要的地位。2007年集团总收入达440亿。今天，方正已经拥有5家在上海、深圳、香港及马来西亚交易上市的公众公司，和海内外的20多家独资、合资企业，员工近3万人。

简介：英荷皇家壳牌集团是全球最大的石油公司之一，在《财富》杂志2002年评选的世界500强公司中排名第四，投资遍及世界130多个国家。业务包括：石油、天然气的勘探、炼制、运输、及营销；化工产品的生产与营销；煤矿采掘；能源的研究与开发等等。

简介：上海亚龙投资（集团）有限公司于1995年6月在上海正式成立。作为一家以工业投资、教育投资、房地产投资为主的大型投资集团公司，得益于改革开放搞活的好政策，经过市场经济近二十年来的摸爬滚打，获得了长足的发展。公司现有员工近2000名。旗下拥有子公司数十家，所属企业和公司多次受到市、区各项表彰。公司目前正以上海这个国内外经济金融中心为依托。通过资金运作

简介：<正>福娃集团有限公司是由原湖北银欣集团有限公司更名而来,是农业部、科技部等九部委评定的首批农业产业化国家重点龙头企业,中国大米加工十强企业。2009年,公司基地被省科技厅认定为"有机稻栽培科技创新示范基地"。

简介：维科控股集团股份有限公司（以下简称维科集团）是以纺织为主业，贸易、房地产、能源、投资综合发展的高效率、国际化产业集团。集团注册资本1．5亿元，2006年集团总资产达55亿元，年营业收入85亿元。集团旗下现有30多家生产、贸易、投资型企业，主要生产销售家纺床上用品套件、棉（毛）毯、缝纫线、棉纱、印染布、装饰布、针织服装、服装面料等，兼营房地产、商贸、进出口业务等。

简介：长沙房产（集团）有限公司简称“长房集团”，是经长沙市人民政府批准、在长沙市工商行政管理局注册登记的国有独资公司制企业。长沙市人民政府作为国有资产授权经营的授权方，授权长房集团为国有资产投资主体，