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简介：Toinvestigatethemechanismofsecondarycirculationsinripcurrentsystems,andtoexploretherelationshipbetweenwaveconditionsandsecondarycirculationintensity,aseriesofnumericalexperimentsisperformedusingcouplednearshorewavemodelandcirculationmodel.Intheseexperiments,theripcurrentsandsecondarycirculationsgeneratedabovebarredbeacheswithripchannelsaresimulated.Acomparisonexperimentisconductedtoinvestigatetheformationandhydrodynamicsofthesecondarycirculations.Modelresultsindicatethatthesecondarycirculationsconsistofalongshoreflowsdrivenbywaveset-upneartheshoreline,partofthefeedercurrentsdrivenbythewaveset-upoverthebars,andonshoreflowsattheendoftheripchanneldrivenbywavebreakingandconvection.Theexistenceofthesecondarycirculationbarelyaffectstheripcurrent,butnarrowsandintensifiesthefeedercurrents.Threegroupsofexperimentsofvaryingincidentwaveconditionsareperformedtoinvestigatetherelationshipbetweenwaveconditionsandsecondarycirculationintensity.Thevelocityofthealongshoreflowofthesecondarycirculationissensitivetothevariationoftheincidentwaveheightandwaterdepth.Itisalsofoundthatthealongshoreflowintensityisindirectproportiontothealongshorevariationofthewaveheightgradientbetweenthebarsandtheshoreline.

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简介：Wereviewcurrentsiliconphotonicdevicesandtheirperformanceinconnectionwithenergyconsumption.Fourcriticalissuesareidentifiedtolowerenergyconsumptionindevicesandsystems:reducingtheinfluenceofthethermo-opticeffect,increasingthewall-plugefficiencyoflasersonsilicon,optimizingenergyperformanceofmodulators,andenhancingthesensitivityofphotodetectors.Majorconclusionsare(1)Mach–Zehnderinterferometer-baseddevicescanachieveathermalperformancewithoutanyextraenergyconsumptionwhilemicroringsdonothaveanefficientpassiveathermalsolution;(2)whiledirectbondedIII–V-basedSilaserscanmeetsystempowerrequirementfornow,hetero-epitaxialgrownIII–Vquantumdotlasersarecompetitiveandmaybeabetteroptionforthefuture;(3)resonantmodulators,especiallycouplingmodulators,arepromisingforlow-energyconsumptionoperationevenwhenthepowertostabilizetheiroperationisincluded;(4)benefitingfromhighsensitivityandlowcost,Ge/Siavalanchephotodiodeisthemostpromisingphotodetectorandcanbeusedtoeffectivelyreducetheopticallinkpowerbudget.Theseanalysesandsolutionswillcontributetofurtherloweringenergyconsumptiontomeetaggressiveenergydemandsinfuturesystems.

简介：这份报纸处理批评quasilinear系统的二个类的一个积极解决方案的存在。我们由山通行证词根的变体证明这些结果，联合二条集中定理和二估计结果。这里，我们避免平常的紧密参数(例如，Palais-Smale条件或Cerami状况)并且为重要答案的存在揭示一些精力水平估计的潜力。

简介：机电的致动器广泛地在许多工业应用被使用。通常有一些限制，在一个设计系统存在。这份报纸建议一个简单方法为机电的致动器设计抑制控制器。控制器合并在内部模型控制利用的想法并且为预兆的控制建模。他们与统一用标准控制系统结构被设计否定反馈。控制器的结构象设计过程一样相对简单。处理机制的输出限制基于许多时间向前走的控制植物行为的预言。机制增加控制控制植物的性能和安全。建议控制器提供的好处在在二个机电的致动器的控制系统执行的真实实验被表明了：一台DC马达和一个electrohydraulic致动器。

简介：Inthispaper,anenergyefficientbandwidthallocationschemeisproposedforwirelesscommunicationsystems.Anoptimalbandwidthexpansion(OBE)schemeisproposedtoassigntheavailablesystembandwidthforusers.Whenthesystembandwidthdoesnotreachthefullload,theremainingbandwidthcanbeenergy-efficientlyassignedtotheotherusers.SimulationresultsshowthattheenergyefficiencyoftheproposedOBEschemeoutperformsthetraditionalsamebandwidthexpansion(SBE)scheme.Thus,theproposedOBEcaneffectivelyassignthesystembandwidthandimproveenergyefficiency.

简介：Theexponentialstabilizationproblemofarobot-camerasystemwithunknowncameraparametersisinvestigated.Basedonthevisualfeedbackandthestate-inputtransformation,anuncertainchainedformmodelispresentedforatypeofnonholonomicmobilerobots.Then,anewtime-varyingfeedbackcontrollerisproposedtostabilizetheuncertainsystemexponentiallywiththehelpofthestabilizationtheorems,state-scalingandswitchingtechniques.Theexponentialstabilityoftheclosed-loopsystemisrigorouslyproved.Simulationresultsaregiventodemonstratetheeffectivenessoftheproposedstrategies.

简介：苏(1，1)动态对称具有在在理论、适用的物理分析无界的量系统的基本重要性。在这份报纸，我们学习与苏一起与量系统联系的概括协调状态的控制(1，1)动态对称。在苏上基于一个假Riemannian度量标准(1，1)组，我们为最小化驾驶系统到需要的最后的状态的控制的领域fluence获得必要条件。进一步的分析证明候选人最佳的控制答案能被分类进正常、反常的extremals。当控制Hamiltonian是非寓言的时，反常extremals能仅仅是经常的函数，当正常extremals能被Weierstrass椭圆形的函数根据控制Hamiltonian的parabolicity表示时。作为一种特殊情况，最大地挤压一个概括协调状态的最佳的控制解决方案是一个正弦曲线领域，它与在实验室被使用的一致。

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简介：Afamilyofarraycodeswithamaximumdistanceseparable(MDS)property,namedLcodes,isproposed.ThegreateststrengthofLcodesisthatthenumberofrows(columns)inadiskarraydoesnotberestrictedbytheprimenumber,andmorediskscanbedynamicallyappendedinarunningstoragesystem.Lcodescantolerateatleasttwodiskerasuresandsomesectorlosssimultaneously,andcantoleratemultiplediskerasures(greaterthanorequaltothree)underacertaincondition.BecauseonlyXORoperationsareneededintheprocessofencodinganddecoding,LcodeshaveveryhighcomputingefficiencywhichisroughlyequivalenttoXcodes.AnalysisshowsthatLcodesareparticularlysuitableforlarge-scalestoragesystems.

简介：在这篇文章，我们在二维的强烈相关的费米子系统在量阶段转变上考察我们的最近的工作。我们由用细胞的动态吝啬地的理论(CDMFT)和连续时间的量蒙特卡罗算法的联合计算状态，两倍占有，和费密表面进化的密度讨论这些系统的metalinsulator转变性质。而且，我们由定义磁性的顺序参数探索每个状态的磁性。包括antiferromagnetic金属，顺磁的金属，Kondo金属，和铁磁性的绝缘体，有许多吸引人的量状态的富有的阶段图被作出对有利的裁决有强烈相关的费米子的二维的格子。我们相信我们的结果将导致真实材料的性质的更好的理解。

简介：Anoveladaptive–impulsiveschemeisproposedforsynchronizingfractional-orderchaoticsystemswithoutthenecessityofknowingtheattractors’boundsinpriori.ThenonlinearfunctionsinthesesystemsaresupposedtosatisfylocalLipschitzconditionsbutwhichareestimatedwithadaptivelaws.Thenoveltyisthatthecombinationofadaptivecontrolandimpulsivecontroloffersacontrolstrategygatheringtheadvantagesofboth.Inordertoguaranteetheconvergenceisnolessthananexpectedexponentialrate,acombinedfeedbackstrengthdesigniscreatedsuchthatthesymmetricaxiscanshiftfreelyaccordingtotheupdatedtransientfeedbackstrength.AlloftheunknownLipschitzconstantsarealsoupdatedexponentiallyinthemeantimeofachievingsynchronization.Twodifferentfractional-orderchaoticsystemsareemployedtodemonstratetheeffectivenessofthenoveladaptive–impulsivecontrolscheme.

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