学科分类
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500 个结果
  • 简介:推进器的数学模型被创造在推进器表演的预言上调查周期的边界条件的影响。相应于DTMB4119的不同进展系数的戳和转矩系数,4382,和4384个推进器被计算。在不同的节的DTMB4119推进器的压力系数分发身体上也被测试。比较显示了在实验和模拟的结果之间的好同意。它证明周期的边界条件能被用来讲道理地预言一个推进器的开的水表演。由为计算分析三个确定的模式,划分格子用花键曲线方法被显示那能比使用切的耙子更好为精确遇见计算要求方法。

  • 标签: 周期边界条件 性能预测 螺旋桨 周期性边界条件 地面数字电视 应用
  • 简介:ThispaperisconcernedwithapplicationsofintegratedsemigroupstothefollowingCauchyproblem:(ACPn)xn(t)=sumfromi=0ton-1Bixi(t),xi(0)=xi,0(?)i(?)n-1whereBi(0(?)i(?)n-1)areclosedlinearoperatorsonaBanachspaceX.Auniquenesstheorem,aconditionofthesolvability,aconditionoftheexponentialwell-posedness,andsomeresultsforthespecialcasethatBn-1isboundedandD(Bn-2)(?)D(Bi)(0(?)i(?)n-3)areobtained.

  • 标签: Higher order abstract CAUCHY problem UNIQUENESS
  • 简介:构造生物网络是在系统生物学的最重要的问题之一。然而,手工地从数据构造一个网络拿一可观大量时间,因此,一个自动化过程被倡导。自动化网络建设的过程,在这个工作,我们使用二种聪明的计算技术,基因编程和神经计算,推断使用连续变量的二种网络模型。验证介绍途径,实验被进行了,初步的结果证明两条途径能被用来成功地推断网络。

  • 标签: 逆向工程 系统建模 遗传性 循环神经网络 表达数据
  • 简介:Usingagentdevelopmenttoolstoconstructanagent-basedsystemisawellappliedapproach.However,thedevelopmenttoolsusuallydonothavethefunctiontocheckthefeasibilityabouttheworkflowoftheagentsystemduringitimplementationstage.Therefore,todevelopanevaluationapproachtoanalyzethefeasibilityofadevelopingagentsystemsuchthattheimproperworkflowofanagentsystemcanbefoundintheearlydesignstageisanecessarytasktoreducetheriskofimplementation.Inthisresearch,aPetriNet(PN)basedthree-stageevaluationapproachwasdeveloped.Intheconceptualstage,thepitfallofthecurrentagentsystemdevelopingprocesswasexaminedandanimprovementanalysisprocesswasspecified.Then,inthesystemdesignstage,anevaluationapproachwhichextractedtheprocesslogfilefromadevelopingagentsystemintoaPNmodelintermsofaprocessminingapproach-αalgorithmwasproposed.ThismodelwassimulatedinaPNsimulationpackage.TheagentsystemperformancewasevaluatedintermsofanalyzingthedeadlockphenomenaofthePNmodel.Finally,intheimplementationstage,theproposedconceptwasimplementedbyusinganagentdevelopingtoolJADEandaPNsimulationtoolCPN.Anagent-basedroboticassemblysystemwasusedtoexaminethepossibledeadlockoftheagentsystem.

  • 标签: 多AGENT 挖掘方法 系统验证 机器人装配系统 开发工具 Petri网
  • 简介:Inthispaper,weprovideanecessaryinfrastructuretodefineanabstractstateexplorationintheHOLtheoremprover.OurinfrastructureisbasedonadeepembeddingoftheMultiwayDecisionGraphs(MDGs)theoryinHOL.MDGsgeneralizeReducedOrderedBinaryDecisionDiagrams(ROBDDs)torepresentandmanipulateasubsetoffirst-orderlogicformulae.TheMDGsembeddingisbasedonthelogicalformulationofanMDGasDirectedFormulae(DF).Then,theMDGsoperationsaredefinedandthecorrectnessproofofeachoperationisprovided.TheMDGreachabilityalgorithmisthendefinedasaconversionthatusesourMDGtheorywithinHOL.Finally,asetofexperimentationsoverbenchmarkcircuitshasbeenconductedtoensuretheapplicabilityandtomeasuretheperformanceofourapproach.

  • 标签: HOL定理 多路决策图 正确性 可达性
  • 简介:Thefastturnoverofsoftwaretechnologies,inparticularinthedomainofinteractivity(coveringuserinterfaceandvisualisation)makesitdifficultforasmallgroupofpeopletoproducecompleteandpolishedsoftware-toolsbeforetheunderlyingtechnologiesmakethemobsolete.AttheHepVis'99workshop,aworkinggrouphasbeenformedtoimprovetherpoductionofsoftwaretoolsfordataanalysisinHENP.Besidepromotingadistributeddevelopmentorganisation,onegoalofthegroupistosystematicallydesignasetofabstractinterfacesbasedonusingmodernOOanalysisandOOdesigntechniques.Aninitialdomainanalysishascomeupwithseveralcategories(componets)foundintypicaldataanalysistools:historams,Ntuples,Functions,Vectors,Fitter,Plotter,AnalyzerandController,SpecialEmphasiswasputonreducingthecouplingsbetweenthecategoriestoaminimum,thusoptimisingre-useandmaintainabilityofanycomponentindividually.TheinterfaceshavebeendefinedinJavaandC++andimplementationsexistintheformoflibrariesandtoolsusingC++(Anaphe/Lizard,Openscientist)andJava(JavaAnalysisStudio),AspecialimplementationaimsataccessingtheJavaLiraries(throughtheirAbstractInterfaces)fromC++.ThispapergiveranoverviewofthearchitectureanddesignofthevariouscomponentsfordataanalysisasdiscussedinAIDA.

  • 标签: 软件开发 数据分析 数据分析工具 HENP
  • 简介:Thepresentpaperdealswiththemethodfortheradarcross-section(RCS)computationsofarbitrarilycomplicatedtargetsbasedontheworkbyD.Klementetal.(1988).Thismethodisconvenientinuse,fastinoperationandpreciseincalculatingRCSofacomplicatedtarget.Withthismethod,theRCSofclassicscatterers,forexample,aconeandacylinder,arecomputedwiththeresultofgoodagreementwithexperimentaldata.Furthermore,theRCS’ofanaircraftmodelatvariousattitudesarecalculatedwiththeresultofgoodagreementwithexperimentaldataalso.

  • 标签: RADAR CROSS-SECTION Panel method RADAR TARGET
  • 简介:TopromotetheapplicationofMgalloytomotorcyclewheeltoreduceweight,thefatigueanalysesofwheelsmadeofA356,AM60BandredesignedAM60Bunderthesameserviceconditionwerecarriedout,revealingthatthepeakstressisreducedby25.6%andstressdistributionbecomesmoreuniforminMg-alloywheelduetoitslowerelasticmodulusincomparisonwithAlalloys.TheservicestresslevelofredesignedMgwheelisrelaxedfurtherbecauseofitsoptimizedstructurebyalteringthespokeconfigurationandincreasingthefilletbetweenspokeandring,satisfyingthedesiredreliabilitywith30%weightsaving.

  • 标签: AM60B 镁合金 摩托车 车轮 应用 有限元
  • 简介:Thispaperpresentstheresultsofourinvestigationsofbreakdownmechanisms,aswellasadescriptionoftheirinfluenceonthedistributionsoftimedelaydistributions,foragastubefilledwithnitrogenat4mbar.Thevaluesofthetimedelayaremeasuredfordifferentvoltages,andthevaluesoftherelaxationtimesandtheirdistributionsandprobabilityplotsareanalyzed.TheobtaineddensitydistributionshaveGaussiandistributionsandexponentialdistributionsfordifferentvaluesofrelaxationtimes(Gaussianforsmallvaluesandexponentialforlargevaluesofrelaxationtime).ItisshownthatformiddlevaluesofrelaxationtimethedelaydistributionshaveashapebetweenGaussianandexponentialdistributions,whichisaresultofthedifferentinfluencesofelectricalbreakdown.

  • 标签: 二极管击穿 机理分析 统计试验 充氮 弛豫时间 应用