简介：Fullysolublepoly[2-methoxy-5-(2’-ethylhexyl)-oxy)-p-phenylenevinylene](MEH-PPV)wassynthesizedbytheadditionofmolecularweightmodifiers(chainstopper,freeradicalscavengers)toapolymerizationsystemcontainingmonomer,catalystandasolvent.ThesePPVproductssynthesizedinthisworkwerecharacterizedbyIR,NMR,UV-visiblespectroscopyandGPC.ResultsshowthattheM_wofpolyphenylvinylene(PPV)canbecontrolledbytheadditionofchainstopper(benzylbromide)andradicalinhibitor(2,6-di-tert-butyl-4-methylphenol).Thepolymerizationmechanisminthepresenceoftheseadditiveswasalsodiscussed.AdualmechanisminvolvingcarbeneforPPVpolymerizationwasproposed.

简介：CoronaryArteryBypassGraft(CABG)isanimportantsurgicaltreatmentforcriticallystenosedarteries.UnfortunatelyrestenosisalwaysoccursafterCABGsurgery,whichbringaboutsurgeryfailure,lntimalthickeningintheCABGdistalanastomosishasbeenimplicatedasthemajorcauseofrestenosisandlong-termgraftfailure.Thenonuniformhemodynamicsincludingdisturbedflows,recirculationzones,oscillatingwallshearstress,andlongparticleresidencetimewerethoughttobethepossibleetiologies.NumericalsimulationwasprovedtobeofgreathelpandguidancemeaningforthebiofluidmechanicsresearchandtheCABGsurgicalplan.ThepresentstudywasbasedonthehypothesisthatthegeometryconfigurationofCABGcouldgreatlyinfluencethehemodynamicsinthevicinityofanastomosis.Thehemodynamicfeaturesoftwogeometrymodelsofend-to-sideCABGwerestudiedandcompared.OnesimulatedaconventionalCABGwith1-waybypassgraft,andtheothersimulatedamodifiedCABGwithsymmetric2-waybypassgraft.Thenumericalinvestigationsofhemodynamicsinthesetwomodelswithfullystenosedcoronaryarterieswereaccomplishedusingfiniteelementmethod.Thetemporalandspatialdistributionsofhemodynamicswereanalyzedandcompared.Resultsshowedthatthepresenceofsymmetric2-waybypassgraftwasofreasonableandfavorablehemodynamicsthan1-waybypassgraft.ThemodifiedCABGmodelcreatedamorehemodynamicallyefficientstreamlinedenvironmentwithhighermeanandmaximumaxialvelocitiesandlowerradialvelocitiesthantheconventional1-waymodel.Meanwhile,thesymmetric2-waybypassgraftwasfeaturedwithlowpressurenearthewall,highanduniformWSSinthehostartery.Allofthesewerefavorableforinhibitingthedevelopmentofintimalthickening,restenosis,andultimatefailureoftheCABG,anditcouldconsiderablyimprovetheflowconditionsanddecreasetheprobabilityofintimalhyperplasiaandrestenosisofCABG.

简介：为计划接近的充分分离的放松的二个班在房间熵不平等上介绍研究分级的能量守恒定律。计划的主要优点；有一个生硬来源术语的令人放松的系统的构造的评论；结论。

简介：这篇论文基于inviscid和imcompressible液体和无旋的流动在液体/结构影响上论述工作的评论。焦点在和边界元素方法(BEM)的速度潜力理论上。充分非线性的边界条件在未知免费表面和动人的身体的弄湿的表面上被强加。评论包括(1)在常数或规定变化速度的身体的垂直、倾斜的水入口，以及免费秋天运动，(2)液体微滴或列影响以及波浪影响身体，(3)膨胀身体的类似答案。它盖住二维(2D)，axisymmetric并且三维(3D)盒子。在数字模拟使用的关键技术被构画出，包括multivalued上的网孔产生免费表面，为扩展域的拉长的坐标系统，压力的相互的依赖和身体打手势的为去耦的辅助函数方法，并且为喷气或薄液体电影的处理在影响期间发展了。

简介：

简介：

简介：BytheSchauder-Tychonofffixed-pointtheorem,weinvestigatetheexistenceandasymptoticbehaviorofpositiveradialsolutionsoffullynonlinearellipticequationsinR^n.WegivesomesufficientconditionstoguaranteetheexistenceofboundedandunboundedradialsolutionsandconsiderthenonexistenceofpositivesolutioninR^n.

简介：Inthispaperlargeeddysimulationofthefullydevelopedturbulentflowinacurvedchanneliscarriedout.ThecomputationalresultsarepresentedandcomparedwiththeexperimentalresultsofEskinaziandYeh.ItisshownthatthenumericalresultsofthepresentLESarereliableandtheinfluenceofthecurvatureontheturbulencefeatureiscorrectlyrevealed.

简介：在我们证明内部坡度和秒的这篇论文，衍生物为Ricci或Schouten张肌的特征值的对称的功能决定的充分非线性的椭圆形的方程的一个班估计。当时，作为应用，我们证明方程的答案的存在歧管局部地正式扁平的反对或Ricci弯曲是积极的。

简介：Sinceitsintroductionin1967,intra-aorticballoonpumping(IABP)hasbecomethemainstayinthemanagementofacuteleftventriculardysfunctioninthecriticalcaresetting.Typically,presentIABPsystemsareunabletoprovideconsistent,effectivecar-diacassistanceinthepresenceofarrhythmiasorrapidlychangingheartrates.Anew-generation,closedloop,fullyautomaticintra-aorticballoonpump(CL-IABP)

简介：Westudymicroscopicspacetimeconvexitypropertiesoffullynonlinearparabolicpartialdifferentialequations.Undercertaingeneralstructurecondition,weestablishaconstantranktheoremforthespacetimeconvexsolutionsoffullynonlinearparabolicequations.Atlast,weconsidertheparabolicconvexityofsolutionstoparabolicequationsandtheconvexityofthespacetimesecondfundamentalformofgeometricflows.

简介：Ahigher-orderboundaryelementmethod(HOBEM)forsimulatingthefullynonlinearregularwavepropagationanddiffractionaroundafixedverticalcircularcylinderisinvestigated.Thedomaindecompositionmethodwithcontinuityconditionsenforcedontheinterfacesbetweentheadjacentsub-domainsisimplementedforreducingthecomputationalcost.Byadjustingthealgorithmofiterativeprocedureontheinterfaces,fourtypesofcouplingstrategiesareestablished,thatis,Dirchlet/Dirchlet-Neumman/Neumman(D/D-N/N),Dirchlet-Neumman(D-N),Neumman-Dirchlet(N-D)andMixedDirchlet-Neumman/Neumman-Dirchlet(MixedD-N/N-D).Numericalsimulationsindicatethatthedomaindecompositionmethodscanprovideaccurateresultscomparedwiththatofthesingledomainmethod.Accordingtothecomparisonsofcomputationalefficiency,theD/D-N/Ncouplingstrategyisrecommendedforthewavepropagationproblem.Asforthewave-bodyinteractionproblem,theMixedD-N/N-Dcouplingstrategycanobtainthehighestcomputationalefficiency.

简介：我们在Dirichlet边界条件下面为边界和充分非线性的、一致地椭圆形的方程的连续粘性答案的内部坡度估计调查锋利的条件。当这些条件被违背时，能有在内部或在领域的边界上坡度骤起。特别地，我们比以前在更一般的生长条件下面在连续粘性答案的本地、全球的Lipschitz连续性上导出锋利的结果。当Dirichlet条件满足在时，边界附近的Lipschitz整齐允许我们预言一古典并且不仅仅在粘性意义，在分开能发生的地方。另一后果是这：如果内部坡度骤起发生，露天梯级类型解决方案能一般来说变得不连续，以便Dirichlet问题能在连续粘性解决方案的类上变得不可解。

简介：Athreedimensionalbounce-averagedFokker-Planck(FP)numericalcodehasbeennewlydevelopedbasedonfullyimplicititerativesolvingmethod,andrelativisticeffectisalsoincludedinthecode.Thecodehasbeentestedagainstvariousbenchmarkcases:OhmicconductivityinthepresenceofweakOhmicelectricfield,runawaylossesofelectronsinthepresenceofstrongOhmicelectricfield,lowerhybridcurrentdriveandelectroncyclotroncurrentdriveviatwo-orthree-dimensionalsimulation.Allthetestcasesrunfastandcorrectlyduringcalculations.Asaresult,thecodeprovidesasetofpowerfultoolsforstudyingradiofrequencywaveheatingandcurrentdriveintokamakplasmas.

简介：Green-Naghdi(G-N)理论是为水波浪的一个充分非线性的理论。一些研究人员把它称为一个充分非线性的Boussinesq模型。G-N理论的复杂性的不同的度被在哪儿的鈥渓evels鈥?区分越高水平，越多复杂并且大概更精确理论。在这里介绍的研究，比较在G-N理论的二个不同层次之间被做，明确地铺平II并且铺平IIIG-N限制理论。限制理论被给的水平IIIG-N的一个线性分析解决方案。一个平面沙滩上的波浪和变浅的波浪两个都与这二个G-N理论被模仿。水平IIIG-N也限制了理论罐头，这第一次被显示出被用来在浅水里预言液体速度。水平IIIG-N限制了理论被推荐而不是水平IIG-N限制理论当模仿时，充分非线性的浅水飘动。关键词Green-Naghdi理论-Boussinesq模型-充分非线性的水飘动-变浅的波浪基础条款：在资助号码50779008和111工程(B07019)下面由中国的国家自然科学基础支持了。箱箱赵在1984出生了。他是一会儿在哈尔滨工程的液体力学的一个博士候选人大学。他的当前的研究兴趣基于BEM包括Green-Naghdi理论和非线性的波浪身体相互作用。Wen-yangDuan在1967出生了。他在设计大学的哈尔滨是一个教授和一个博士监督人。他的当前的研究兴趣包括非线性的波浪身体相互作用，SPH方法和Boussinesq模型。

简介：瞄准充分利用类似物到当保留山峰平均比率(同等)时，没有oversaturation，digitalizing咬了的数字变换器(模数转换器)稳定，这份报纸提出一新分割完整数字(SFD)为新长期的进化(LTE)的自动获得控制(自动增益控制)算法通讯系统。分割的数字获得控制策略被采用基于检测力量地位由仅仅一步调整获得。要调整的获得需要是否由当前的信号状态被决定，源于输入信号和目标信号的邻近的根平均数平方(RMS)的变化范围。实现的软件模拟和硬件与LTE频率分割被进行了双(软式磁碟机)uplink信号和结果显示建议自动增益控制算法能精确地判定力量地位并且进一步，因此与短延期在一步精确调整获得没有oversaturation，它能象使同等稳定一样充分利用模数转换器digitalizing小点。另外，吝啬的错误向量大小(EVM)被限制不到1.6%投射遇见第三产生合伙(3GPP)标准很好。

简介：NonlinearSchrodingerequation(NSE)arisesinmanyphysicalproblems.Itisaveryimportantequation.Alotofworksstudiedthewellposed,theexistenceofsolutionofNSEetc.Andtherearemanyworksstudiedthenumericalmethodsforit.Recently,sincethedevelopmentofinfinitedimensionaldynamicsystemthedynamicalbehaviorofNSEhasbeeninvestigated.Thepaper[1]studiedthelongtimewellposedness,theexistenceofuniversalattractorandtheestimateofLyapunovexponentforNSEwithweaklydamped.Atthesametimeitwasneedtostudythelargetimenewcomputationalmethodsandtodiscussitsconvergenceerrorestimate,theexistenceofapproximateattractorsetc.InthispapewestudytheNSEwithweaklydamped(1.1).Weassume,where0<λ<2isaconstant.Ifwewishtoconstructthehigheraccuracycomputationalscheme,itwillbedifficultthatstaighfromtheequation(1.1).Thereforewestartwith(1.4)andusefullydiscreteFourierspectralmethodwithtimedifferencetodisscus

简介：Afullydifferentialcomplementarymetaloxidesemiconductor(CMOS)lownoiseamplifier(LNA)for3.1–10.6GHzultra-wideband(UWB)communicationsystemsispresented.TheLNAadoptscapacitivecross-couplingcommon-gate(CG)topologytoachievewidebandinputmatchingandlownoisefigure(NF).Inductiveseries-peakingisusedfortheLNAtoobtainbroadbandflatgaininthewhole3.1–10.6GHzband.Designedin0.18μmCMOStechnology,theLNAachievesanNFof3.1–4.7dB,anS11oflessthan–10dB,anS21of10.3dBwith±0.4dBfluctuation,andaninput3rdinterceptionpoint(IIP3)of–5.1dBm,whilethecurrentconsumptionisonly4.8mAfroma1.8Vpowersupply.ThechipareaoftheLNAis1×0.94mm2.

简介：Theforcesactingonagastungstenarc(GTA)weldpoolareanalyzed.Amodelofstaticforceconditionforfally-penetratedweldpoolisdeveloped,andthecriterionissetuptojudgeandevaluatetheoccurrencetendencyofburn-throughdefect.Transientvariationsoftheforcesaffectingthesurfacesdeformationandcollapsingofweldpoolarecomputed,andthepercentagesoftheirinfluencingrolesareobtained.Forspecificmaterialandworkpiecethickness,thethresholdvaluesbelowwhichtheburn-throughphenomenondoesnotoccuraredetermined,andcomparedwiththeexperimentalresults.

简介：这篇论文试图基于充分温度地，集中地和速度地联合与模仿微观结构形成微动力学。作者介绍了一个新方法，它是频分多路复用和细胞的自动机(CAFD)的联合设想片由真空投资过程扔了的薄复杂超级合金汽轮机的微观结构形成。异构的成核的分发，取向和机制，树突的生长动力学并且对equiaxed转变(CET)圆柱被考虑。利用这些模仿的计划，谷物的规模和一致性上的关键进程变量的全面影响被调查了份量上。模仿的谷物尺寸和形态学与试验性的结果同意很好。