简介:为河的水,沉积和许多水质成分典型地从贡献分水岭的高地以及从降低举起的溪流方面地区和河岸被导出。这为内部和平的西北和大盆区域的地形的复杂的风景是特别地明显的,在从高举起的积雪场的雪水是为穿越广泛的半干旱的低地的河的主要的水来源的地方。当硫管理通常集中于下游地高顺序的活动范围时,自然资源经理逐渐地在硫的头水里担心小、低顺序的河系和河边的环境。对理解头水水文学的需要为头水和中间举起的扇区的水疗院逻辑政体亲密地在低举起的、高顺序的流活动范围在被连接到流速及流水量和隧道进程的一个牧场分水岭系统被表明。全面的、成功的河和分水岭管理和模拟模型申请要求足够地理解的水疗院逻辑和来源分水岭的生态系统特征。
简介:TheALICEdetectoratLHC(CERN),willrecordrawdataatarateof1.2Gigabytespersecond.TryingtoanalyseallthisdataatCRNwillnotbefeasible.AsoriginallyproposedbytheMONARCproject,dtacollectedatCERNwillbetransferredtoremotecentrestousetheircomputinginfrastructure,Theremotecentreswillreconstructandanalysetheevents.andmakeavailabletheresults.Thereforehigh-ratedatatransferbetweencomputingcentres(Tiers)willbecomeofparamountimportance.ThispaperwillpresentseveralteststhathavebeenmadebetweenCERNandremotecentresinPadova(Italy),Torino(Italy),Catania(Italy),Lyon(France),Ohio(UnitedStates),Warsaw(Poland)andCalcutta(India),Thesetestsconsisted,inafirststage,ofsendingrawdatafromCERNtotheremotecentresandback,usingaftpmethodthatallowsconnectionsofseveralstreamsatthesametime.Thankstothesemultiplestreams,itispossilbletoincreasetherateatwhichthedataistransferred.Whileseveral"multiplestreamftpsolutions"alreadyexist,ourmethodisbasedonaparallelsocketimplementationwhichallows,besidesfiles,alsoobjects(oranylargemessage)tobesendinparallel.Aprototypewillbepresentedabletomanagedifferenttransfers.Thisisthefirststepofasystemtobeimplementedthatwillbeabletotakecareoftheconnectionswiththeremotecentrestoexchangedataandmonitorthestatusofthetransfer.
简介:Theemergenceofhighspeedwideareanetworksmakesgridcomputingareality.HowevergridapplicationsthatneedreliabledatatransferstillhavedifficultiestoachieveoptimalTCPperformanceduetometworktuningofTCPwindowsizetoimporvethebandwidthandtoreducelatencyonahighspeedwideareanetwork.ThispaperpresentsapureJavapackagecalledJPARSS(javaParallelSecureStream)thatdividesdataintopartitionsthataresentoverseveralparallelJavaStreamssimultaneouslyandallowsJavaorWebapplicationstoachieveoptimalTCPperformanceinagirdenvironmentwithoutthenecessityoftuningtheTCPwindowsize.SeveralexperimentalresultsareprovidedtoshowthatusingparallelstreamismoreeffectivethantuningTCPwindowsize.InadditionX.509certificatebasedsinglesign-onmechanismandSSLbasedconnectionestablishmentareintegratedintothispackage,Finallyafewapplicationsusingthispackagewillbediscussed.
简介:在2006年5月,高紧张野火在Daxing'an山发生在Songling森林区域,中国。八个离子的集中变化(K[+],Na[+],Ca[2+],Mg[2+],Cl,Br,NO3;SO4[2])被测量在烧;在到2006年10月的从5月的火以后的未燃的溪流。大多数离子流动是更高的在的结果表演在采样时期期间在未燃的溪流比那烧了溪流,;从烧的溪流搬运的大多数离子的最大的集中发生在7月。在火以后,大多数振幅化学药品离子是Ca[2+],谁的平均集中,是5.50mg·L[1]比那高在里面未燃的溪流,;每个化学离子的全部的集中介绍趋势Ca[2+]>SO4[2]>Na[+]>Mg[2+]>NO3。Ca的平均集中[2+],SO4[2],Na[+],Mg[2+],NO3显示出K的一个增加趋势,而是那些[+],Cl,Br有一个减少的趋势。SO4[2]在这些阴离子之中有最大的损失,由NO3列在后面。总的来说,阳离子的增加度比在烧以后的阴离子的大。
简介:Streamprocessingapplicationscontinuouslyprocesslargeamountsofonlinestreamingdatainrealtimeornearrealtime.Theyhavestrictlatencyconstraints.However,thecontinuousprocessingmakesthemvulnerabletoanyfailures,andtherecoveriesmayslowdowntheentireprocessingpipelineandbreaklatencyconstraints.Theupstreambackupschemeisoneofthemostwidelyappliedfault-tolerantschemesforstreamprocessingsystems.Itintroducescomplexbackupdependenciestotasks,whichincreasesthedifficultyofcontrollingrecoverylatencies.Moreover,whendependenttasksarelocatedonthesameprocessor,theyfailatthesametimeinprocessor-levelfailures,bringingextrarecoverylatenciesthatincreasetheimpactsoffailures.Thispaperstudiestherelationshipbetweenthetaskallocationandtherecoverylatencyofastreamprocessingapplication.Wepresentacorrelatedfailureeffectmodeltodescribetherecoverylatencyofastreamtopologyinprocessor-levelfailuresunderataskallocationplan.Weintroducearecovery-latencyawaretaskallocationproblem(RTAP)thatseekstaskallocationplansforstreamtopologiesthatwillachieveguaranteedrecoverylatencies.WediscussthedifferencebetweenRTAPandclassictaskallocationproblemsandpresentaheuristicalgorithmwithacomputationalcomplexityofO(nlog2n)tosolvetheproblem.Extensiveexperimentswereconductedtoverifythecorrectnessandeffectivenessofourapproach.Itimprovestheresourceusageby15%-20%onaverage.
简介:随煤气的汽轮机的入口温度的增加,由使用常规方法的好处是可能的接近他们的限制。因此,学习为超过这些当前的限制使方法凉下来的新奇电影是必要的。基于热转移改进的理论,由使溪流凉下来与化学反应使方法凉下来的一部电影被建议。以便测试建议方法的可行性,数字模拟被进行了。有30度洞的经典的扁平的板结构被用于模拟。在现在的学习,在与使有效性凉下来的电影上的化学反应的关系的参数的效果例如化学的热水池,卷变化,和反应率,数字地被调查。冷却的常规电影也为比较被计算。电影冷却有效性由于化学反应显然被改进的结果表演,和反应热和冷却的反应率流在电影有效性上有重要效果。然而,卷变化的效果能被忽略。
简介:Thecoreunitofthe80-kt/astyreneproject——thestyreneunitwasputonstreamatthefirstattemptatJinzhouPetro-chemicalCompany,symbolizingthecompletionofconstructionandstartupofthe80kt/astyreneunitcomprisedofthestyrenesectionandtheethylbenzenesection,theinvestmentinwhichtotals394millionRMB
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简介:二月的一天我接到一封磨损得像已经拆过的信,这封信从北京发到福州我原来的单位又转到北京我现在单位,布满了惨不忍堵的邮戳.两天后我和这封信的作者在北师大东门有了第一次约会,约会的内容包括吃饭、登香山、互相聊一些自己的经历,中间夹杂着文
简介: 郑局长从市里开会回来,就把我叫去,说要在机关周围的这片居民区物色一个帮扶对象,其标准是:双下岗职工,年龄在40至50岁之间.办好了,算是局里给困难职工尽了一把薄力.……