简介：StabilityisofextremeimportancetoChinawhichisfocusingoneconomicdevelopment,reformandopeningup.Withoutstability,thereisnowayofcarryingoutreformandopeningup,letaloneeconomicdevelopment.JustasDengXiaopingsaid,"Withoutastableenvironment,nothingcouldbeaccomplished."StabilityhasensuredasustainableandrapiddevelopmentofChinaintheseyears.WhycanChinamaintainstability?SomepeopleintheWestaccuseChinaofautocracy,sayingthatthestressofstabilityisnothingbutapretextofsuppressingdemocracy

简介：Thispaperdescribessomeinertialalgorithmsfortheapproximationofnonlincarevolutionequationsandstudiesaprioriestimatesoftheapproximatesolutiomandthestabilityoftheinertialalgorithms.

简介：这篇文章处理微分系统的思考功能。结果被使用讨论这些微分系统的稳定性。

简介：

简介：RelativestabilitymarksthecurrentRussianscene.Yetuncertaintieslingerandfreshtroublesarebrewing.PresidentBorisYeltsinwonabigvictorywiththeadoptionofthenewconstitutionbyplebisciteandaslightmajorityofsup-portersinthenewDuma.Thenationalyearningsforstabilityalsoworkinhisfa-vor.However,thepolitical,economicandsocialcriseshestillfacesaredaunting.Andthedisputeoverthenecessityofpresidentialreelectionmayflareupagainin

简介：

简介：PotentialenergysurfaceofHNOSsystemisinvestigatedbymeansofMP2methodwith6-311++G(d,p)basisset.TheenergyforeachminimumandsaddlepointonthepotentialenergysurfaceiscorrectedattheQCISD(T)/6-311++G(3df,2p)leveloftheorywithzero-pointvibrationalenergyincluded.Asaresult,eighteenisomersaretheoreticallypredictedandcis-HNSOisfoundtobeglobalminimumonthepotentialenergysurface,Wherein,fourteenisomersareconsideredaskineticallystablespecies,andshouldbeexperimentallyobserved.ComparisonsaremadeforHNOSsystemwithitsanalogues,HNO2andNHS2.Thenatureofbondingandisomers'stabilityofHNOSsystemaresimilartoHNS2.TheobvioussimilaritiesanddiscrepanciesamongHNOS,HNO2andHNS2areattributedtothehypervalentcapacityofsulfur,oxygenandnitrogenatoms.

简介：Thealmostsurestabilityofhomogeneousviscoelasticplatessubjectedtoarandomwide-bandstationaryin-planeloadisinvestigated.TheviscoelasticbehavioroftheplateisdescribedintermsoftheBo-ltzmannsuperpositionprinciple,therelaxationkernelsofwhicharerepresentedbythesumsofexponents.Ontheassumptionthatthein-planeloadisrandomwide-bandstationaryprocess,sufficientconditionsforal-mostsurestabilityofviscoelasticplatesareobtainedbytheapplicationsofLyapunov’sdirectmethod.

简介：Inthispaper,weformulateauniformmathematicalframeworkforstudyingswitchedsystemswithpiecewiselinearpartitionedstatespaceandstatedependentswitching.Basedonknownresultsfromthetheoryofdifferentialinclusions,wedeviseaLyapunovstabilitytheoremsuitableforthisclassofswitchedsystems.Withthis,weproveaLyapunovstabilitytheoremforpiecewiselinearswitchedsystemsbymeansofaconcreteclassofLyapunovfunctions.Contrarytoexistingresultsonthesubject,thestabilitytheoremsinthispaperincludeFilippov(orrelaxed)solutionsandallowinfiniteswitchinginfinitetime.Finally,weshowthatforaclassofpiecewiselinearswitchedsystems,theinertiaofthesystemisnotsufficienttodetermineitsstability.Anumberofexamplesareprovidedtoillustratetheconceptsdiscussedinthispaper.

简介：在一份以前的报纸，一些特别multistep余弦方法被构造因为能线性地以一个稳定、明确的方法集成，它证明了很有效秒顺序的生硬问题及时。在现在的纸，为这种类型的一般方法的稳定性被给保证的条件，以及回声的彻底的研究并且为对称的过滤(它在另一份报纸，被证明了在Hamiltonian波浪方程关于invariants的保存很有益地表现)。这里被给的，是在提及的方面分析并且对待任何这种类型的方法的一个系统的方法。

简介：Thestabilityofriverbankssubjecttoseepageisstudiedexperimentallyandtheoreticallyinthispaper.Byincludingseepageina3-dimensionaltheoreticalanalysis,thestudyfirstshowshowthecriticalslopeorangleofreposeofacohesionlessmaterialisrelatedtotheratioofthehydraulicgradientofseepagetoitscriticalvalueunderthefluidizationcondition.Thecriticalstableslopeisshowntoberelatedtonotonlythehydraulicgradientbutalsotheseepagedirection.Measuredlaboratorydatareasonablyfitwellwiththetheoreticalrelationshipforthecaseofinjectionandsuction.Thedatarevealthattheslopeisreducedwithinjectionandincreasedwithsuction,respectively.Additionally,thestudyidentifiestheseepagedirectionwhichresultsinaminimumcriticalstableslopeforacertainhydraulicgradientofseepage.

简介：Asingle-axisfluxdecaymodelincludinganexcitationcontrolmodelproposedin[12,14,16]isstudied.AsthebifurcationparameterPm(inputpowertothegenerator)varies,thesystemexhibitsdynamicsemergingfromstaticanddynamicbifurcationswhichlinkwithsystemcollapse.Weshowthattheequilibriumpointofthesystemundergoesthreebifurcations:onesaddle-nodebifurcationandtwoHopfbifurcations.Thestatevariablesdominatingsystemcollapsearedifferentfordifferentcriticalpoints,andtheexcitativecontrolmayplayanimportantroleindelayingsystemfromcollapsing.Simulationsarepresentedtoillustratethedynamicalbehaviorassociatedwiththepowersystemstabilityandcollapse.Moreover,bycomputingthelocalquadraticapproximationofthe5-dimensionalstablemanifoldatanorder5saddlepoint,ananalyticalexpressionfortheapproximatestabilityboundaryisworkedout.

简介：Thestabilityofthethinliquidfilminacapillaryisimportanttothephase-changeheattransferprocessinminiatureofmicrostructures.Fromthebasicequationsformotionandheattransferattheinterfaceofthefilm,itsstabilityistheoreticallystudied.Withevaluationoftheeffectsandrelativemagnitudesofvariousdrivingforcesandwiththeuseoflong-wavetheoryinadditiontolinearstabilityanalysis,thecontrollingequationsaresimplifiedandanevolutionequationforthefilm'sthicknessisobtained.Detailedanalysisontheevolutionequationshowsthatinstabilityoccursfirstinthemeniscusregionandtheinstabilityconditionvarieswithboundaryconditions,geometricalscalesandthermalproperties.Thenumericalresultsagreewellwithearlieroneswithsomefavorableextensionsandimprovements.

简介：在反馈控制循环的通讯网络的插入做分析；一个网络控制系统的设计更复杂，；导致降级的一些问题控制系统的性能；甚至引起系统不稳定性。主要方面与导致网络的延期集中于网络控制系统(NCS)的稳定性分析，数据包退学学生，；多重包的传播。这些问题必须在NCS的设计被考虑。这个工作总结主要研究结果，；对一些相关处理途径评论；技术。调查的主要目的NCS是介绍新研究州的；指出未来工作的一些领域。

简介：Inthispaper,adiscrete-timeanalysisofthethird-ordercharge-pumpbasedphase-lockedloops(CPLLs)ispresentedinthepresenceofloopdelay.Thez-domainanalysisoftheclosed-looptransferfunctionisderivedandcomparedwiththetraditionals-domainmethod.ThesimulationresultsunderSPECTREshowthat,duetothesamplingnatureofCPLL,thetraditionals-domainanalysisisunabletopredictitsjitterpeakingaccurately,especiallywhentheloopdelayistakenintoconsideration.Theimpactofloopdelayonthestabilityofthethird-orderCPLLsystemisfurtheranalyzedbasedontheproposedway.ThestabilitylimitofthewidebandwidthCPLLwithloopdelayiscalculated.Thecircuitsimulationresultsagreewellwithmathematicalanalysis.

简介：Alinearstabilityanalysisisperformedforaplumeflowinsideacylinderofaspectratio1.TheconfigurationisidenticaltothatusedbyLopezandMarques(2013)fortheirdirectnumericalsimulationstudy.Itisfoundthatthefirstbifurcation,whichleadstoaperiodicaxisymmetricflowstate,isaccuratelypredictedbylinearanalysis:boththecriticalRayleighnumberandtheglobalfrequencyareconsistentwiththereportedDNSresults.Itisfurthershownthatpressurefeedbackdrivestheglobalmode,ratherthanabsoluteinstability.

简介：与搏动在magneto-hydro-dynamic泵为充分发达的流动驱动器的稳定性在这糊一个分析解决方案横向的Eletro磁性的领域被介绍。做这，流动的一个理论模型被开发，分析结果被获得因为两个都对合适的圆柱、笛卡儿的配置在海洋的容器的推进使用。管理寓言的动量PDE用近似速度分发被转变成一个平常的微分方程。数字结果被获得，asymptotic分析被造发现答案的数学行为。在为斯图亚特数字，电磁的相互作用数字，雷纳兹数字，方面比率，以及磁性、电的尖频率和阶段角度的移动的各种各样的价值的magneto-hydro-dynamic泵对时间的最大的速度被介绍。结果证明为一个高级斯图亚特数字，为在流动的某个方向的液体流动的稳定性有频率限制。这稳定性频率依赖于一条隧道的几何参数。

简介：Theimportanceofcosmologicalconstantforthecosmologicalmodelsisgiven.Thevariationsofthecosmologicalmodelforparametersλandkwerediscussedrespectively.Nearλ=0,thecosmologicalmodelisunstablewiththechangeofλ,andnearλ=β=0,thecosmologicalmodelisunstablewiththechangeofk.Sowhenweconsiderthestablecosmologicalmodel,wemustconsiderthenonzerocosmologicalconstant.

简介：Inthepasttenyearssince9/11,terrorismhasbecomeagrowingthreattointernationalsecurity,andtopeople'slivesandproperty.Increasingincidentsofterrorismhaveunderlinedthefundamentalstructuralflawsintheinternationalsystem,showingthatAmericanhegemonyhasreachedacertainlimit.NotonlyhavethemajorsecurityconcernsoftheUnitedStateschanged,butexistinginternationalstrategicrelationshavealsobeenshaken.Thishasdirectlyaffectedglobalstrategicstability.

简介：LetT=(T(t))t≥0beaboundedC-regularizedsemigroupgeneratedbyAonaBanachspaceXandR(C)bedenseinX.WeshowthatifthereisadensesubspaceYofXsuchthatforeveryx∈Y,σu(A,Cx),thesetofallpointsλ∈iRtowhich(λ-A)^-1Cxcannotbeextendedholomorphically,isatmostcountableandσr(A)NiR=Ф,thenTisstable.AstabilityresultforthecaseofR(C)beingnon-denseisalsogiven.Ourresultsgeneralizetheworkonthestabilityofstronglycontinuoussenfigroups.