简介:异构的计算(HC)环境与不同计算能力利用多样的资源解决有多样的计算要求和限制的计算集中的应用程序。在HC环境的任务指派问题能正式至于任务和机器的一个给定的集合被定义,把最小使平底锅成为的任务分到完成的机器。在这篇论文,我们建议首先安排启发式的、高标准偏差的一项新任务(HSTDF),它把一项任务的期望的实行时间的标准偏差看作一个选择标准。一项任务的期望的实行时间的标准偏差在不同机器上在任务实行时间代表变异量。我们的结论是有高标准偏差的任务必须为安排被分配第一。实验的一个大数被执行检查有效性求婚在有存在启发规则的不同情形,和比较启发式(Max-min,Sufferage,分割了Min平均的、分割的Min-min,并且分割了Max-min)清楚地表明求婚启发式以一般水准超过所有存在启发规则做平底锅。
简介:ThepaperestablishestwostochasticSIRSmodelswithjumpstodescribethespreadofnetworkvirusbycyberwar,terrorismandothers.First,addingrandomperturbationsproportionallytoeachvariable,wegetthedynamicpropertiesaroundthepositiveequilibriumofthedeterministicmodelandtheconditionsforpersistenceandextinction.Second,givingarandomdisturbancetoendemicequilibrium,wegetastochasticsystemwithjumps.BymodifyingtheexistingLyapunovfunction,weprovethepositivesolutionofthesystemisstochasticallystable.
简介:有在相反的方向驾驶的二种粒子的系统的结构的进化,即,由颜色域开车,被分子的动力学模拟调查。Gaussian自动调温器,在系统限制粒子的热速度的一个普通处理,被使用了以便说明热的驱散并且允许系统到达一个稳定的状态。随驱动力(F)的力量的增加,系统从一个开始随机的混合状态经历明显的结构的转变到分开的小巷并且在每条小巷描绘的一个状态,这被发现了仅仅一个种粒子存在。分析证明为小巷结构的形成的原因是F而且粒子磨擦的变化的增加不仅系数。当使用Gaussian自动调温器时,粒子磨擦系数成为F的功能。增加的F导致高粒子磨擦系数并且不可避免地为足够强壮的驱动力导致小巷形成。当在磨擦系数上提起F的效果并且选择一个经常的磨擦系数时,我们的结果显示出那因为在那里的给定的F总是存在比系统将比哪个发展成小巷结构高的磨擦系数的批评的值。
简介:Weinvestigatethedynamiccrystallizationprocessesofcolloidalphotoniccrystals,whicharepotentiallyinvaluableforsolvinganumberofexistingandemergingtechnicalproblemsinregardstocontrolledfabricationofcrystals,suchassizenormalization,stabilityimprovement,andaccelerationofsynthesis.Inthispaper,wereportsystematichigh-resolutionopticalobservationofthespontaneouscrystallizationofmonodispersepolystyrene(PS)micro-spheresinaqueoussolutionintoclose-packedarraysinastaticlineopticaltweezers.Theexperimentsdemonstratethatthecrystalstructureismainlyaffectedbytheminimumpotentialenergyofthesystem;however,thecrystallizationdynamicscouldbeaffectedbyvariousmechanical,physical,andgeometricfactors.Thecomplicateddynamictransformationprocessfrom1Dcrystallizationto2Dcrystallizationandthecreationandannihilationofdislocationsanddefectsviacrystalrelaxationareclearlyillustrated.Twomajorcrystalgrowthmodes,theepitaxygrowthpatternandtheinsertedgrowthpattern,havebeenidentifiedtoplayakeyroleinshapingthedynamicsofthe1Dand2Dcrystallizationprocess.Theseobservationsofferinvaluableinsightsforin-depthresearchaboutcolloidalcrystalcrystallization.
简介:Thispaperpresentsasimplenonparametricregressionapproachtodata-drivencomputinginelasticity.Weapplythekernelregressiontothematerialdataset,andformulateasystemofnonlinearequationssolvedtoobtainastaticequilibriumstateofanelasticstructure.Preliminarynumericalexperimentsillustratethat,comparedwithexistingmethods,theproposedmethodfindsareasonablesolutionevenifdatapointsdistributecoarselyinagivenmaterialdataset.
简介:VelocityInterferometerSystemforAnyReflector(VISAR)[BarkerandHollenbach,J.Appl.Phys.43,4669(1972)]isawell-knowndiagnosticthatisemployedonmanyshockphysicsandpulsed-powerexperiments.WiththeVISARdiagnostic,thevelocityonthesurfaceofanymetalflyercanbefound.FormostexperimentsemployingVISAR,eitherakineticpressure[Grady,Mech.Mater.29,181(1998)]oramagneticpressure[Lemkeetal.,IntlJ.ImpactEng.38,480(2011)]drivesthemotionoftheflyer.Moreover,reliablepredictionofthetime-dependentpressureisoftenacriticalcomponenttounderstandingthephysicsoftheseexperiments.AlthoughVISARcanprovideaprecisemeasurementofaflyer’ssurfacevelocity,therealchallengeofthisdiagnosticimplementationisusingthisvelocitytounfoldthetimedependentpressure.ThepurposeofthispaperistoelucidateanewmethodforquicklyandreliablyunfoldingVISARdata.
简介:Stimulatedbyioncyclotronresonancefrequency(ICRF)heatingandneutralbeaminjection(NBI)heatingwhichcangenerateanisotropyintemperatureandtemperaturegradientofionsintokamakexperiments,Migliuolofirstinvestigatedeffectsofiontemperatureanisotropyoniontemperaturegradient(ITG)drivenmodesinashearlessslabconfiguration.
简介:最近,放射压力加速(RPA)被建议了并且广泛地学习了,它证明那循环地极化了(CP)激光脉搏能在phase-stable-acceleration(PSA)加速单音精力充沛的离子捆从ultrathin陪衬的方法。自我组织的质子横梁能稳定地在10点在和一个平面目标的CP激光的相互作用被加速到GeV,这被发现<啜class=“a-plus-plus”>22W/cm<啜class=“a-plus-plus”>2。称为紧缩的激光血浆质子加速器(CLAPA)的一个工程最近被大多数在中国同意。激光的一个原型驾驶质子加速器(1~15MeV/1Hz)将基于PSA机制和血浆透镜在下一五年里在北京大学被造。它以后将为惯性的范围熔化为象癌症治疗,血浆成像和快点火那样的应用被升级到200兆电子伏。
简介:Amethodforinertialconfinementfusiondrivenbypowerfullongwavelengthelectromagneticpulses(EMPs),suchasCO2laserpulsesorhighpowermicrowavepulses,isproposed.Duetothehighefficiencyofgeneratingsuchlongwavelengthelectromagneticpulses,thismethodisespeciallyimportantforthefuturefusionelectricitypower.Specialfueltargetsaredesignedtoovercometheshortcomingsofthelongwavelengthelectromagneticpulses.
简介:Inthispaper,therecentstudiesoflaboratoryastrophysicswithstrongmagneticfieldsinChinahavebeenreviewed.OntheShenguang-IIlaserfacilityoftheNationalLaboratoryonHigh-PowerLasersandPhysics,alaser-drivenstrongmagneticfieldupto200Thasbeenachieved.Theexperimentwasperformedtomodeltheinteractionofsolarwindwithdaysidemagnetosphere.Alsothelowbetaplasmamagneticreconnection(MR)hasbeenstudied.Theoretically,themodelhasbeendevelopedtodealwiththeatomicstructuresandprocessesinstrongmagneticfield.Alsothestudyofshockwavegenerationinthemagnetizedcounter-streamingplasmasisintroduced.
简介:Wehavedevelopedanewradiographysetupwithashort-pulselaser-drivenx-raysource.Usingaradiographyaxisperpendiculartobothlong-andshort-pulselasersallowedoptimizingtheincidentangleoftheshort-pulselaseronthex-raysourcetarget.Thesetuphasbeentestedwithvariousx-raysourcetargetmaterialsanddifferentlaserwavelengths.Signaltonoiseratiosarepresentedaswellasachievedspatialresolutions.ThehighqualityofourtechniqueisillustratedonaplasmaflowradiographobtainedduringalaboratoryastrophysicsexperimentonPOLARs.
简介:Ultrashortlaserpulsesareusedtocreatesurfacestructuresonthin(25μm)silicon(Si)wafers.Scanningthewaferwithagalvanometricmirrorsystemcreateslargehomogeneouslystructuredareas.Thevarietyofstructureshapesthatcanbegeneratedwiththismethodisexemplifiedbytheanalysisofshape,heightanddistanceofstructurescreatedintheambientmediaairandisopropanol.Astudyofthecorrelationbetweenstructureheightandremainingwaferthicknessispresented.Thecomparativelyeasymanufacturingtechniqueandthestructurevarietythatallowsforcustom-tailoredtargetsshowgreatpotentialforhighrepetitionrateionaccelerationexperiments.
简介:n种类的二个催化出生的模型(n≥2)驾驶withexchange的生长处理的总数被建议并且比较。在里面以前一个,交换反应与率核K_m发生在任何二总数A_k~m和一样的种类的A_j~m之间(k,j)=K_mkj(m=1,2,...,n,n≥2),并且A~n种类的总数催化A~lspecies的单体出生(l=1,2,...,n-1)与催化作用率核J_l(k,j)=J_lkj~υ。运动行为借助于吝啬地的理论被调查。我们发现A~l种类的进化行为ofaggregate尺寸分发a_k~l(t)关键地取决于催化作用率参数υ的值:(ⅰ)a_k~l(t)在υ≤的情况中遵守常规可伸缩法律0,(ⅱ)a_k~l(t)在υ>的情况中满足一种修改可伸缩的形式0。在第二个模型,A~l种类催化的A~n种类的单体出生的机制根据第一个模型被增加,也就是说,A~l和A~n种类的总数催化对方到causemonomer出生。A~l和A~n种类的运动行为被发现为不同的υ掉进二个范畴:(与υ≤服从常规可伸缩的形式的ⅰ)生长0,(在有υ>的有限时间的ⅱ)gelling0。