简介：在这份报纸，为m厚度李重量的MacWilliams类型身份在\mathbbF2+u\mathbbF2\mathbb上为线性代码枚举符{F}_2+u\mathbb{F}_2被决定。作为这身份的一个应用程序，作者在\mathbbF2m+u\mathbbF2m\mathbb上为线性代码在李重量上获得MacWilliams类型身份{F}_{2^m}+u\mathbb{F}_{2^m}。而且，作者由利用Krawtchouk多项式为m厚度李重量分布证明两重性。

简介：在这篇论文，象D-B-preinvexity的如此的新定义，strictlyD-B-preinvexity并且明确地，为珍视向量的地图砰的D-B-preinvexity第一被介绍。然后，D-B-preinvex地图砰的一个足够的条件被显示出。然后在之间的关系明确地-D-B-preinvexity并且严格地，D-B-preinvexity被讨论。最后，D-B-preinvex类型地图砰的一些性质被给。

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简介：Thispaperconsiderstwodimensionalsystemswhichhavepurelyimaginaryeigenvalues.Inordertoobtainmorepropositionsofinvariantcurves,theauthorstransformtherealsystemsintocomplexdifferentialsystemsbyusingasuitablelineartransformation.Theauthorsalsoproposeanalgorithmtocomputeexponentialfactors.Animprovedmethodofconstructingintegratingfactorbyusingallinvariantcurvesispresentedandcanbeusedindeterminingthetypeoftheequilibriumpoints.

简介：延期微分系统广泛地在许多不同的域里被使用。决定他们的equilibria的本地稳定性是重要的。为有延期依赖者参数的系统，equilibria的稳定性分析复杂、困难。在这篇论文，我们将与延期依赖者参数调查典型方程的一种类型的最终的稳定性。我们的结果证明有延期依赖者参数的典型方程可以是之一在之间最终稳定、最终不稳定、交替稳定、不稳定。Applyingour结果，最终的稳定性能经常直接被决定并且不必呼吁数学软件。二个例子在这篇论文被给。

简介：Motivatedbythedoubleautoregressivemodelwithorderp(DAR(p)model),inthispaper,westudythemovingaveragemodelwithanalternativeGARCHerror.ThemodelisanextensionfromDAR(p)modelbylettingtheorderpgoestoinfinity.Thequasimaximumlikelihoodestimatoroftheparametersinthemodelisshowntobeasymptoticallynormal,withoutanystrongmomentconditions.Simulationresultsconfirmthatourestimatorsperformwell.WealsoapplyourmodeltostudyarealdatasetandithasbetterfittingperformancecomparedtoDARmodelfortheconsidereddata.

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简介：Weconsideramanpowerplanningproblemwithsingleemployeetypeoveralongplanninghorizonandanalyzetheoptimalrecruitmentanddismissalpolices.Dynamicdemandsformanpowermustbefulfilledbyallocatingenoughnumberofemployees.Costsforeveryemployeeincludesalary,recruitmentanddismissalcosts,inparticular,setupcostswhenrecruitment/dismissalactivitiesoccur.Weformulatetheproblemasamulti-perioddecisionmodel.Thenweanalyzepropertiesoftheproblemandgiveanimproveddynamicprogrammingalgorithmtominimizethetotalcostovertheentireplanninghorizon.Wereportcomputationalresultstoillustratetheeffectivenessoftheapproach.

简介：TwoArmijo-typelinesearchesareproposedinthispaperfornonlinearconjugategradientmethods.ThetwoArmijo-typelinesearchesareshowntoguaranteetheglobalconvergenceoftheDYmethodfortheunconstrainedminimizationofnonconvexdifferentiablefunctions.Further,ifthefunctionisstrictlyconvex,thetwoArmijo-typelinesearchesandanotherArmijo-typelinesearcharealsoshowntoguaranteetheconvergenceoftheDYmethod.

简介：InthispapertheWilsonnonconformingfiniteelementisemployedtosolveSobolevandviscoelasticitytypeequations.Bymeansofpost-processingtechnique,globalsuperconvergenceestimatesareobtainedforquasi-uniformrectangularmeshes.Finally,anerrorcorrectionschemeispresented.

简介：Thegeneralizedautoregressiveconditionalheteroskedasticity(GARCH)typemodelsareusedtoinvestigatethevolatilityofBangladeshstockmarket.Thefindingsofthestudydemonstratethattheindexvolatilitycharacteristicschangesovertime.Thearticleshowsthatthedataaredividedintothreesub-periods:precrisis,crisis,andpostcrisis.Accordingly,theresultsofthefindingsindicatechangesintheGARCH-typemodelsparameter,riskpremiumandpersistenceofvolatilityindifferentperiods.Asignificant'low-yieldassociatedwithhigh-risk'phenomenonisdetectedinthecrisisperiodandthe'leverageeffect'occursineachperiods.Theinvestorsareirrationalwhichisbasedonassumptionofriskandreturncharacteristicsofassets.Consequently,themarketisnotasmatureasdevelopedmarket.Itisfoundinthearticlethatthethresholdgeneralizedautoregressiveconditionalheteroskedasticity(TGARCH)modelismoreaccurateforthemodelaccuracy.Additionally,statisticerrormeasurementsindicatethatGARCHmodelismoreefficientthanothersandithasalsomoreforecastingability.

简介：Thispaperdevelopsgoalprogrammingalgorithmtosolveatypeofleastabsolutevalue(LAV)problem.Firstly,wesimplifythesimplexalgorithmbyprovingtheexistenceofsolutionsoftheproblem.Then,wepresentagoalprogrammingalgorithmonthebasisoftheoriginaltechniques.TheoreticalanalysisandnumericalresultsindicatethatthenewmethodcontainsalowernumberofdeviationvariablesandconsumeslesscomputationaltimeascomparedtocurrentLAVmethods.

简介：研究了新Lü系统的混沌同步问题。基于Lyapunov稳定性理论，首先利用非线性反馈控制实现了具有丰富动力学行为的两新Lü混沌系统的自同步以及新Lü系统与Lorenz系统间的异结构同步，其次利用线性耦合的方法探讨了该系统耦合自同步的充分条件。获得了使新Lü系统渐近同步的控制方法。严格的数学理论分析和Matlab的数值仿真都证明了所给方法的有效性。

简介：LetFbeafieldofcharacteristiczero.Wn=F[t(+1/2),t(+1/2),...,t(+1/n)]δ/δt1+...+F[t(+1/2),t(+1/2),...,t(+1/n)]δ/δtnistheWittalgebraoverF,Wn+=F[t1,t2...,tn]δ/δt+...+F[t1,t2...,tn]δ/δtnisLieshbalgebraofWn.ItiswellknownbothWnandWn+aresimpleinfinitedimensionalLiealgebra.InZhao'spaper,itwasconjecturedthatEnd(Wn^+)-{0}=Aut(Wn^+)anditwasprovedthatthevalidityofthisconjectureimpliesthevalidityofthewell-knownJacobianconjecture.Inthisshortnote,wechecktheconjectureaboveforn=1.WeshowEnd(W1^+)-{0}=Aut(W1^+).

简介：(n，f，k)：F(G)系统由n部件组成，系统失败(工作)如果并且仅当有至少f，没有通过(工作)部件或至少k连续失败(工作)部件。这些系统模型能在电子设备，在银行的自动支付系统，和炉子系统被使用。在这份报纸，我们介绍并且学习(n，f，k):F并且(n，f，k)：由加权的部件组成的G系统。递归的方程为这些新模型的可靠性评估被介绍。我们也在重量上提供一些条件代表加权--(n，f，k)系统象往常一样(n，f，k)系统。

简介：Inthispaper,weinvestigatethepthmomentuniformlyasymptoticstabilityofimpulsivestochasticfunctionaldifferentialsystemsbyextendingsomeRazumikhin-typetheorems.BasedontheLyapunovfunctionsandRazumikhintechniques,somecriteriaareestablishedandtheirapplicationstoimpulsivestochasticdelaysystemsareproposed.Anillustrativeexampleshowstheeffectivenessofourresults.

简介：最近几年参加了全国科学技术名词审定委员会组织的《生物化学与分子生物学名词》（第二版）审定和《英汉生物学大词典》的编撰，同时笔者编写了《蛋白质导论》一书。在这过程中，深感蛋白质定名是一个非常复杂、令人烦恼和困惑的事。

简介：摘要伴随着科学技术的快速发展，我国高空气象探测业务呈现出高速发展的态势，整体管理结构和控制机制都实现了跨越式增长。本文通过对L波段高空气象探测资料审核要点进行分析，以确保出站记录和报表的合格性水平，为气候分析、气象预报工作的开展提供高准确度和可靠性强的高空气象探测资料。

简介：摘要本文结合郑州市气象局开展高空探测的实际，简要概况L波段高空探测原理，分析高空探测雷达丢球现象，并针对丢球现象提出有针对性应对措施，为今后开展高空气象探测提供参考。

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