简介：为很快摆动的功能的dx被介绍的为∫_a~bf(x)e~(ⅰωg(x))的集成的一些照方法。这些方法，基于更低的顺序剩余物ofTaylor扩大并且跟随了Stetter，Iserles和Norsett的想法，对所有ωand合适错误的腐烂能任意地被增加以防那g′(x)≠0为x∈[一，b]，并且对容易被实现并且延长到不适当的集成和一般盒子我[f]=∫_a~bf(x)e~(ⅰg(ω，x))dx。

简介：Thisisashortsurveyonosicllatoryintegraloperators.Wesummarizethemaindevelopmentandman-agingtechniquesofthefield,andgivesomeopenproblemsandmainreferencesintheend.

简介：<正>Inthispaperwestudymultilinearoscillatorysingularintegralswithroughkernelandgiveacriterionofcertainboundednessforthiskindofoperator

简介：ThevalidityofNavier'spartialslipconditionisinvestigatedbystudyingtheoscillatoryflowinacoatedchannel.Thetwo-fluidmodelisusedtosolvetheunsteadyviscousequationsexactly.Partialslipisexperiencedbythecorefluid.ItisfoundthatNaviersconditiondoesnotholdforanunsteadycorefluid.

简介：TheauthorsconsiderthemultilinearoscillatorysingularintegraloperatordefinedbyTA1,A2,…,Akf(x)=∫R^ne^ip(x,v)k/∏/j=1Rmi(Ajix,y)(Ω(x-y))/(│x-y│^n+M)f(y)dy,whereP(x,y)isareal-valuedpolynomialonR^n×R^n,Ωishomogeneousofdegreezero,Rmj(Aj;x,y)denotesthemj-thorderTaylorseriesremainderofAjatxexpandedabouty,M=k/∑j=1mj,ItisshownthatifΩbelongstothespaceLlog^+L(S^n-1)andhasvanishingmomentuptoorderM,then‖TA1,A2,…,Akf‖q≤ck/∏/j=1(∏/│α│=mj‖D^αAj‖rj)‖f‖p,providedthat1

简介：在一个thermoacoustic声波发电机的摆动的流动被描述。thermoacoustic声波发电机在thermoacoustic设备起一个重要作用。在工作液体的工作液体和栈，加速和减速之间的热交换并且粘滞在栈并且在回声试管影响的磨擦损失thermoacoustic声波生成器的性能。特别地，摆动的流动显著地影响在工作液体和栈之间的热交换机制。在压力和速度的时间的变化是在回声试管内的正弦曲线。流动就在试管插头后面形成一口摆动的喷气，并且在回声试管外面下游地远变得断断续续。0.63R的无限制的修正，也就是说尽管有在试管插头外面，被速度大小证实并且流动，摆动的流动特征下游地被维持的区域可视化。另外，他们几乎等于听觉的理论结果。关键词thermoacoustic现象-声波生成器-摆动的流动CLC数字TK11.4

简介：Anewelectrochemicaloscillatorysystemofbromateinalkalinesolutionisreported.InPt-Bromate-Alkalinesolutionsystem,twodifferenttypesofelectrochemicaloscillations(TypeⅠandTypeⅡ)canbeobserved.TypeⅠappearsbeforehydrogenevolutionandTypeⅡinvolvesperiodichydrogenevolution.TypeⅠrelatestotheadsorption/desorptionofthehydrogenonplatinumelectrode,andTypeⅡwithperiodicoscillationstemsfromthecouplingofelectrochemicalreactions(thereductionofbromateandevolutionhydrogenreaction)withmasstransfer(diffusionandconvection).Moreover,undertherightconditions,thetwotypesappearindifferentoscillatorymodes,forexample,simpleperiodicalmodeandmixedone,etc..Crossedcycleinthecyclicvoltammograms,whichisthebasiccharacteristicsforelectrochemicaloscillatorysystems,hasalsobeenobservedasexpected.

简介：Inthispaper,byusingtheatomicdecompositionoftheweightedweakHardyspaceWH1w（Rn）,theauthorsdiscussaclassofmultilinearoscillatorysingularintegralsandobtaintheirboundednessfromtheweightedweakHardyspaceWH1w（Rn）totheweightedweakLebesguespaceWL1w（Rn）forw∈A1（Rn）.

简介：-ThehydrodynamicforcesonasmoothinclinedcircularcylinderexposedtooscillatingflowwereexperimentallyinvestigatedatReynoldsnumber(Re)intherange40000-200000andKeulegan-Capenternumber(KC)intheintervalfrom5-40.Inthetest,RenumberandKCnumberwerevariedsystematically.Theinertiaforcecoefficient(Cu)andthedragforcecoefficient(CD)inMorisonequationweredeterminedfromthemeasuredloadsandthewaterparticlekinematics.InthisanalysisamodifiedformofMorisonequationwasusedsinceitusesthenormalvelocityandacceleration.Thus,theapplicabilityoftheCrossFlowPrinciplewasassumed.Thisprinciple,simplystated,isasfollows:theforceactinginthedirectionnormaltotheaxisofacylinderplacedatsomeobliqueanglewiththedirectionofflowisexpressedintermsofthenormalcomponentofflowonly,andtheaxialcomponentisdisregarded.Boththetotalin-lineforcecoefficient(CF)andtransverseforce(lift)coefficient(Cf)wereanalyzed

简介：在在形式e~(i|x|~a)的摆动的单个不可分的操作员T的Triebel-Lizorkin空格的围住的海角Ω(x)|x|~(-n)被学习∈R，≠0，1并且Ω∈L~1(S~(n-1))度零是同类的并且满足某些取消条件。什么时候内核Ω(x′)∈Llog~+L(S~(n-1))，F_p~(一，q)(R~n)围住上述操作符的海角被获得。同时，什么时候Ω(x)满足L~1-Dini状况，上述操作符T被围住onF_1~(0,1)(R~n)。

简介：HereweconsiderthefollowingstronglysingularintegralT_(?,γ,α,β)f(x,t)=∫_(R~n)e~[i|y|~(-β)]?(y/|y|)/|y|~(n+α)f(x-y,t-γ(|y|))dy,where?∈L~p(S~(n-1)),p>1,n>1,α>0andγisconvexon(0,∞).WeprovethatthereexistsA(p,n)>0suchthatifβ>A(p,n)(1+α),thenT_(?,γ,α,β)isboundedfromL~2(R~(n+1))toitselfandtheconstantisindependentofγ.Furthermore,when?∈C~∞(S~(n-1)),wewillshowthatT?,γ,α,βisboundedfromL~2(R~(n+1))toitselfonlyifβ>2αandtheconstantisindependentofγ.

简介：

简介：Oscillatoryturbulentflowoveraflatplateisstudiedusinglargeeddysimulation(LES)andReynolds-averageNavier-Stokes(RANS)methods.Adynamicsubgrid-scalemodelisemployedinLESandSaffman’sturbulencemodelisusedinRANS.Theflowbehaviorsarediscussedfortheacceleratinganddeceleratingphasesduringtheoscillatingcycle.ThefrictionforceonthewallanditsphaseshiftfromlaminartoturbulentregimearealsoinvestigatedfordifferentReynoldsnumbers.

简介：在这篇论文，摆动的周期的答案的存在结果被获得因为第二订平常的微分方程-u'(t)=f(t，u(t))，在此f：R~2→Ris连续奇怪的功能并且是在t周期的2π-。讨论在锥基于固定的点索引理论。

简介：InthispaperwegiveLp-boundednessfortheoperatorTudefinedbywhereP(x,y)isarealnontrivialpolynomialonRn×Rn,Ωishomogeneousofdegreezero,Ω∈Lq(Sn-1),q>1/(1-μ)andb(r)∈BV(R+),TheresultcanberegardedasanimprovementofF.RicciandE.M.Stein’sresultforfractionaloscillatoryintegraloperatorwithsmoothnesskernel.

简介：Thetheta(t)-typeoscillatorysingularintegraloperatorshasbeendiscussed.Withthenon-negativelocallyintegrableweightedfunction,theweightednorminequalityoftheta(t)-typeoscillatorysingularintegraloperatorsisproved,andtheweightedfunctionhasreplacedbyactionofHardy-Littlewoodmaximaloperatorsseveraltimes.

简介：在科学研究与工程计算中对插值的分析与方法理论已有很重要的应用,而对于ENO插值的方法与理论在大多教科书中却很少涉及,本文介绍ENO插值的应用及算法,为大学生们学习数值分析中的插值计算提供参考.

简介：我们用理论、数字的方法在摆动的媒介调查一致振荡器的象Turing一样波浪不稳定性。一个宣传波浪模式在系统的角落发源当一致振荡器经由Turing-likewave变得不稳定时，出现不稳定性。到quasi-periodicallypropagated的从周期性地宣传的波浪模式的分叉挥动模式，然后发生到空间与时间的混乱，，从一致振荡器的茶碱稳定性阀值的系统尺寸增加。

简介：

简介：Anumericalmodelfortheself-burialofapipelinetrenchisdeveloped.Morphologicalevolutionsofapipelinetrenchundersteady-currentoroscillatory-flowconditionsaresimulatedwith/withoutapipelineinsidethetrench.Theoscillatoryflowinthisstudyrepresentstheactionofwaves.Thetwo-dimensionalReynolds-averagedcontinuityandNavier-Stokesequationswiththestandardk-εturbulenceclosure,aswellasthesedimenttransportequations,aresolvedwiththefinitedifferencemethodinacurvilinearcoordinatesystem.Bothbedandsuspendedloadsofsedimenttransportareincludedinthemorphologicalmodel.Becauseofthelackofexperimentaldataonthebackfillingofpipelinetrenches,thenumericalmodelisfiretlyverifiedagainstthreeclosely-relevantexperimentsavailableinliterature.Adetailedmeasurementofthechannelmigrationphenomenonundersteadycurrentsisemployedfortheassessmentoftheintegralperformanceofthemodel.ThetwoexperimentalresultsfromU-tubetestsareusedtovalidatethemodel'sabilityinpredictingoscillatoryflows.Differenttime-marchingschemesareemployedforthemorphologicalcomputationunderunidirectionalandoscillatoryconditions.Itisfoundthatvortexmotionswithinthetrenchplayanimportantroleinthetrenchdevelopment.