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简介：这份报纸为机器人考虑转矩控制问题，灵活关节由电的致动器开车。用PI转矩控制器的可完成的靠近环的追踪带宽可能由于零由负担动力学介绍了的传播是有限的，这被显示出。这限制被与PI转矩控制器在一致从负担运动使用积极反馈克服。积极反馈以负担速度，加速和猛拉被给。稳定性调节因为设计分散的PI转矩控制器以Routh-Hurwitz标准被导出。封闭系统的骚乱拒绝性质被描绘，分析被执行由省略加速或猛拉信号调查近似积极反馈的使用。这份报纸的结果为二DoF(自由的度)被说明系统。一个DoF系统的试验性的结果也被包括。

简介：最近，Popa和Rasa[27，28]出现了(在里面)一些古典操作员的稳定性定义在上[0，1]并且当积极线性操作员在Hyers-Ulam的意义是稳定的时，发现最好的常数。在这份报纸，我们显示出Hyers-Ulam(在里面)紧缩的磁盘上的复杂Bernstein-Schurer操作符，复杂Kantrovich-Schurer操作符和Lorentz操作符的稳定性。当操作员在Hyers和Ulam的意义是稳定的时，在情况中，我们为各自的操作员发现Hyers-Ulam稳定性常数的infimum。

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：Inthispaper,weestablishanexistencecriterionoftriplepositivesolutionsofaclassofnonlinearfourth-orderthree-pointboundaryvalueproblembytheLeggettWilliamsfixedpointtheorem.Theinterestingpointisthatthenonlineartermisinvolvedwithalllow-levelderivatives.

简介：Inthispaper,westudythehybridSchr¨odingerequationinvolvingnormalandfractionalLaplaceoperator,andobtaintheexistenceofthesolutionstothisclassofthehybridpartialdifferentialequation.Ourmainargumentisvariationalmethods.

简介：Inthispaper,weconsiderexistenceanduniquenessofpositivesolutionstothreecouplednonlinearSchrdingerequationswhichappearinnonlinearoptics.Weusethebehaviorsofminimizingsequencesforaboundtoobtaintheexistenceofpositivesolutionsforthreecoupledsystem.Toprovetheuniquenessofpositivesolutions,weusetheradialsymmetryofpositivesolutionstotransformthesystemintoanordinarydifferentialsystem,andthenintegratethesystem.Inparticular,forN=1,weprovetheuniquenessofpositivesolutionswhen0≤β=μ1=μ2=μ3orβ>max{μ1,μ2,μ3}.

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简介：TheZ=56bariumnucleirepresentoneofthebestexampleofanisotopicchaintoexploretheevolutionofquadrupoledeformationastheneutronnumberdecreases.Theneutron-deficientbariumisotopeswithmassnumberArangingfrom120to130couldbeeasilyproducedbytheheavy-ionfusionevaporationreactions,andthushavebeenwellstudiedinrayspectroscopyexperiments.

简介：Background:Withthelossofspeciesworldwideduetoanthropogenicfactors,especiallyinforestedecosystems,ithasbecomemoreurgentthanevertounderstandthebiodiversity-ecosystemfunctioningrelationship(BEFR).BEFRresearchinforestedecosystemsisverylimitedandthusstudiesthatincorporategreatergeographiccoverageandstructuralcomplexityareneeded.Methods:Wecompiledground-measureddatafromapprox.onehalfmilionforestinventorysampleplotsacrossthecontiguousUnitedStates,Alaska,andnortheasternChinatomaptreespeciesrichness,foreststocking,andproductivityatacontinentalscale.Basedonthesedata,weinvestigatedtherelationshipbetweenforestproductivityandtreespeciesdiversity,usingamultipleregressionanalysisandanon-parametricapproachtoaccountforspatialautocorrelation.Results:Ingeneral,forestsintheeasternUnitedStatesconsistedofmoretreespeciesthananyotherregionsinthecountry.ThehighestforeststockingvaluesovertheentirestudyareawereconcentratedinthewesternUnitedStatesandCentralAppalachia.Overall,96.4%ofsampleplots(477,281)showedasignificantpositiveeffectofspeciesrichnessonsiteproductivity,andonly3.6%(17,349)hadaninsignificantornegativeeffect.Conclusions:Thelargenumberofground-measuredplots,aswellasthemagnitudeofgeographicscale,renderedoverwhelmingevidenceinsupportofapositiveBEFR.Thisempiricalevidenceprovidesinsightstoforestmanagementandbiologicalconservationacrossdifferenttypesofforestedecosystems.Foresttimberproductivitymaybeimpairedbythelossofspeciesinforests,andbiologicalconservation,duetoitspotentialbenefitsonmaintainingspeciesrichnessandproductivity,canhaveprofoundimpactsonthefunctioningandservicesofforestedecosystems.

简介：Weinvestigatetheinteractionbetweenapositivemassandanegativeeffectivemassthroughathreemasschainconnectedwithelasticsprings,apairofmassesisdesignedtohaveaneffectivenegativemass,anditinteractswiththethirdpositiveoneasifanequivalenttwo-masschain.Thedynamicsoftheequivalenttwo-masschainshowsthatthetwobodiesmaybeself-acceleratedinsamedirectionwhentheeffectivemassbecomesnegative,theexperimentisalsoconductedtodemonstratethistypeofmotion.Wefurthershowthattheenergyprinciple(Hamilton’sprinciple)isapplicableiftheenergyofthenegativemassunitisproperlycharacterized.Theresultmayberelevanttocompositewithcellsofeffectivenegativemass,theirinteractionwithmatrixmayleadtomorericherunexpectedmacroscopicresponses.

简介：TheDNA-dependentproteinkinasecatalyticsubunit(DNA-PKcs)playsamajorroleinDNAdamagesignalingandrepair,andisalsofrequentlyover-expressedintumormetastasis.WeusedisogeniccelllinesexpressingdifferentlevelsofDNA-PKcstoinvestigatetheroleofDNA-PKcsinmetastaticdevelopment.Interestingly,ourresultsshowedthatX-rayirradiationinducedthemetastasisofDNA-PKcspositive(M059K)butnotnegative(M059J)cells;however,genisteincouldsuppresstheradiation-inducedmetastaticpotentialofM059Kcells(Fig.1).Theconcretemechanismsunderlyingthisphenomenonwillbeinvestigatednextyear.

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