简介:Parallelgraphreductionisapromisingmodelfornewgenerationcomputerbecauseofitsamenabilitytobothprogrammingandparallelcomputing.Inthispaper,aninitialdesignforaparallelgraphreductionmodel,PGRmodel,ispresented,whichemployseagerevaluationstrategytoexploitconservativeparallelismandprovideswithprimitivesandassociatedtageofnodestosynchronizeconcurrenttasks.Moreover,adirectoperationaldescriptionofgraphreductionintermsofhighlevelinstructions(primitives)isgiventoobtainavirtualmachine,calledPGRVM.
简介:Generallyadatabaseencompassesvariouskindsofknowledgeandissharedbymanyusers.Differentusersmaypreferdifferentkindsofknowledge.Soitisimportantforadataminingalgorithmtooutputspecificknowledgeaccordingtousers'currentrequire-ments(preference).Wecallthiskindofdataminingrequirement-orientedknowledgediscovery(ROKD).Whentheroughsettheoryisusedindatamining,theROKDproblemishowtofindareductandcorrespondingrulesinterestingfortheuser.Sincereductsandrulesaregeneratedinthesameway,thispaperonlyconcernswithhowtofindaparticularreduct.Theuser'srequirementisdescribedbyanorderofattributes,calledattributeorder,whichimpliestheim-portanceofattributesfortheuser.Intheorder,moreimportantattributesarelocatedbeforelessimportantones.Thentheproblembecomeshowtofindareductincludingthoseattributesanteriorintheattributeorder.Anapproachtodealingwithsuchaproblemisproposed.Anditscompletenessforreductisproved.Afterthat,threekindsofattributeorderaredevelopedtodescribevarioususerrequirements.
简介:在这份报纸,在年度流量和沉积运输的变化被从10使用长期的观察数据向南向北从远方越过中国在10条大河里计量车站到远方估计了。年度沉积收益通常在过去的一半有一个减少的趋势,这被发现世纪。每区域根据在年度流量和沉积的变化让步,中国的河能被分类进下列三个组:1)有减少的年度沉积运输和稳定的流量的河;2)有减少的年度沉积运输和流量的河并且3)有极大地减少的年度沉积运输和减少的年度流量的河。结果显示那,在所有南部的河里(到包括Huaihe河的Huaihe河的南方),在平均年度流量有小变化但是在年度沉积运输的戏剧的减少。然而,在北河里,年度沉积收益和流量显示出减小的重要证据。为了进一步在年度流量和沉积调查最近的变化,搬运,来自这10个计量车站在的短期的观察数据最近10年被估计了。结果证明年度沉积运输和流量在过去的10年里在北河里显著地减少了。在Lijin车站把黄河用作一个例子,为最后10年的平均年度流量仅仅是长期的平均价值的1/3和最后10年的平均年度沉积收益仅仅是长期的平均价值的1/4。更不平常地,在Yongding河里,年度沉积收益接近了零,流量显著地减少了。另外,在流量和沉积运输的变化上的人的活动的影响被讨论了。
简介:Theelectrochemicalreductionbehaviorofbilirubin(BR)atplatinumelectrodeinDMFwasinvestigatedbycyclicvoltammetry,insituelectronspinresonancespectroscopyandinsiturapidscanningthinlayerspectroelectrochemistry.ExperimentalresultsrevealedthatthereductionofBRfirstlyundergoesanECEprocess:BR-+eBR-dimerize(BR)22-+e(BR)23-.Thegenerated(BR)23-canbere-oxidizedtoBRandthentopurpurin(Pu)byaseriesofoxidationprocesses:(BR)23--e(BR)22--2e2BR,BR--2eBV--2ePu.However,there-reductionreactionsofPuarenotthereverseprocesses.Thedifferentreductionmechanismsarediscussedindetail.
简介:在许多机器学习应用程序,数据不是免费的,并且为每个数据项目有测试费用。为节俭的原因,最小化测试的某存在工作尝试花费了并且同时,保存一个给定的决定系统的一个特别性质。在这份报纸,我们指出一个人能负担得起的测试费用在一些应用是有限的。因此,一个人不得不牺牲各自的性质在一项预算下面保留测试费用。形式化这期,我们定义测试费用限制属性减小问题,在优化目的是最小化有条件的信息熵的地方。这个问题是test-cost-sensitive属性减小问题和0-1背囊问题的必要归纳,因此它是更挑战性的。我们基于信息获得和测试费用建议一个启发式的算法处理新问题。算法在四UCI上被测试(加利福尼亚大学-Irvine)有各种各样的测试的数据集花费了背景。试验性的结果显示唯一的userspecified参数的适当设置。
简介:Onthebasisofroughsettheory,thestrengthsofdynamicreductionareelaboratedcomparedwithtraditionalnon-dynamicmethods.Asystematicconceptofdynamicreductionfromsamplingprocesstothegenerationofthereductsetispresented.Anewmethodofsamplingiscreatedtoavoidthedefectsofbeingtoosubjective.Andinordertodealwiththeover-sizedtimeconsumingproblemintraditionaldynamicreductionprocess,aquickalgorithmisproposedwithintheconstraintconditions.Wehavealsoprovedthatdynamiccorepossessestheessentialcharacteristicsofareductioncoreonthebasisoftheformalizeddefinitionofthemulti-layereddynamiccore.
简介:InChina,thereisasystemknownas'legalaward,'whichisappliedtopeopleservingprisonterms.Aprison-erwhogetssuchawardmayhavehisorherprisontermsreducedorevenhavehimselforherselfreleasedonparole.Thelegalawardhastobepassedbythepeople'scourtaccordingtoastrictjudicialprocedureafterreceivingtheapplicationfrompenaltyexecutionorganortheprisonauthority.Theprincipleforsuchawardisthattheremustbegoodperformanceinrepentandthereisnolongerthreattothesociety.
简介:Thispaperdescribesthebenefits,technicaldifficultiesanddisadvantagesofthecurrentheavyreductionsolutionsforplateproduction.Forupdatedplatemills,thispapergivesabetterideafortheheavyreductioncontrolintherollingprocess.Thatistokeepthereductionamountconstantinthefront-endandback-endsectionsoftheplateandtoadopttaperedrollingwithvariablereductioninthemiddlesectionoftheplate.Thissolution(alreadyappliedforapatent)cannotonlyfullyutilizethecapacityofthemillmotors,butalsopreventdifficultiesinplatebitingcausedbytheconventionalheavyreductionsolutionswithexcessivedraft.Thistechnicalsolutionhasbeenimplementedatthe5mplatemillplantofBaosteel,andindustrialtestshaveprovedthefeasibilityofit.Thispaperpresentsandanalyzestheindustrialtestdataandprovesthatthetaperedheavyreductiontechnologycanreducethenumberofrollingpasses.Inaddition,thispaperlooksforwardtothefutureresearchinthisarea.
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