学科分类
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9 个结果
  • 简介:在光亢奋的透镜的Sub-diffraction-limit成像基于圆柱的元材料被学习。亢奋的透镜的一些参数例如散关系和成像的分叉角度,数字地与光线轨道方法和有效中等理论被分析。绝缘的常数上的成像性质的依赖被讨论。作为结果,0°分叉角度为最好的成像效果被获得。这个工作将对设计,结构制造和光亢奋的透镜的决定改进有用。

  • 标签: 光衍射 光性质 物理学 研究
  • 简介:我们执行驾驶的限制顺序的数字模拟SergiMalsov(SM)为probality分发和投标问传播和引号更改频率U的自相关功能建模并且调查。为probality分发,模型sucessfully复制传播的幂定律延期和引号更改频率的exponenetial腐烂。为自相关功能,传播和模型的引号更改频率由一条幂定律腐烂,它与实验学习一致。我们获得幂定律为传播的代表0.54,它在对真实金融市场的好同意。

  • 标签: 频率 数学模型 功率定律 电子学
  • 简介:Itisfoundthatthereisanupper-limitcriticalpowerforself-guidedpropagationofintenselasersinplasmainadditiontothewell-knownlower-limitcriticalpowersetbytherelativisticeffect.Abovethisupper-limitcriticalpower,thelaserpulseexperiencesdefocusingduetoexpulsionoflocalplasmaelectronsbythetransverseponderomotiveforce.Associatedwiththeupper-limitpower,alower-limitcriticalplasmadensityisalsofoundforagivenlaserspotsize,belowwhichself-focusingdoesnotoccurforanylaserpower.Boththeupper-limitpowerandthelower-limitdensityarederivedtheoreticallyandverifiedbytwo-dimensionalparticle-in-cellsimulations.Thepresentstudyprovidesnewguidanceforexperimentaldesigns,whereself-guidedpropagationoflasersisessential.

  • 标签: LASER plasma interaction LASER WAKEFIELD ACCELERATION
  • 简介:WithintheframeworkoftheUsdpf(16)interactingbosonmodel(IBM),theeffectsofstrongcorrelationsofthedipole(p--boson)andtheoctupole(f--boson)degreeoffreedomonthepositive-paritystatesofeven-evennucleiinSU(3)limitarediscussed.Itisshownthatconfigurationsofanevennumberofmanyp-andf-bosonscannotonlybeincorporatedintotheusuallow-lyingcollectiverotationalbands,suchasthegroundstateband,β-andγ-vibrationalbands,butalsonaturallyformtheKπ=1+,3+rotationalbands,etc.TheseresultsaresimilartothatofUsdg(15)-IBMandinagreementwellwiththeexperimentaldataofthe17672Hf104nucleus.Besides,severalintrabandE2transitionprobabilitiesaregiven,whichareconsistentwiththatofUsd(6)-IBM.

  • 标签: 玻色子相互作用模型 IBM 偶极矩 强相关性 转动带 原子核物理学
  • 简介:Thetargetofthelargenegativeionsourcebasedonneutralbeaminjection(N-NBI)istoproduceneutralbeamcurrentof22Aandbeampowerof10MWat500keVwithdurationtimeof10s.Sinceitwassuccessfullyoperatedin1996,the5.3MWneutralbeampowerat380keVwithdurationtimeof3shasbeenachieved.Inrecentyearsimprovingandenhancingthebeampoweraregoingon.Severalreasonssuchasplasmanon-uniformity,higherbeamdensityattheupperregioninthebeamprofile,

  • 标签: 能量限制 能量分配 负离子 中性电子束 等离子体
  • 简介:<正>Theauthorswouldliketoapologizeforanerrorfoundintheacknowledgementsectiononpage79.Theacknowledgementshouldread:ThisworkissupportedinpartbyNationalBasicResearchProgramofChina(GrantNo.2013CBA01501)andNational

  • 标签: GUIDED UPPER INTENSE CUBE Magic PARTIALLY
  • 简介:WithvonMisesyieldcriterion,theloadingrangeofNetSectionCollapse(NSC)Criteriaisextendedfromcombinedtensionandbendingloadingstocombinedbending,torsionandinternalpressureloadings.AnewtheoreticalanalyzingmethodofplasticlimitloadforpressurepipewithincompleteweldingdefectsbasedontheextendedNSCCriteriaispresentedandthecorrelativeformulasarededuced,theinfluencesofpipecurvature,circumferentiallengthanddepthofincompleteweldingdefectsontheplasticlimitloadofpressurepipeareconsideredaswellinthismethod.Meanwhile,accordingtotheorthogonalexperimentaldesignmethod,theplasticlimitloadsarecalculatedbythefiniteelementmethodandcomparedwiththetheoreticalvalues.Theresultsshowthattheexpressionsofplasticlimitloadofpressurepipewithincompleteweldingdefectsunderbending,torsionandinternalpressurebasedonextendedNSCcriteriaarereliable.Thestudyprovidesanimportanttheoreticalbasisfortheestablishmentofsafetyassessmentmeasuretowardspressurepipewithincompleteweldingdefects.

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  • 简介:有在一个减少的蚂蟥神经原模型的混乱的增加时期的串联的机制与人诊所轨道作为一个僵绳节点限制周期的分叉被建议令人满意“小脑叶条件”,而不是不可靠的大祸。在每刺增加,新尖铁出现在爆炸ers的刺的阶段的结束。

  • 标签: 神经元模型 极限环 同宿轨道 小叶 水蛭 节点