简介：Theaggregationbehaviorandstructureofhydrophobicallymodifiedblockcopolymersofacrylamideand2-phenoxylethylacrylatewereinvestigatedbyviscometry,1HNMRrelaxation,2DNOESY,fluorescenceanddynamiclightscattering.Itwasfoundthattheaggregationbehaviorwasstronglydependentontheconcentrationofpolymersolutionandthehydrophobecontents.Withvaryingconcentrationfrom2.0,6.0,8.0to12.0g/L,thereweredifferentaggregatemorphologiesdistributedinaqueoussolutions,suchasmonopolymerchain,micelle-likeaggregate,multi-micelleaggregateandcross-linkednetwork.Accordingtothemodelofaggregation,itcangiveareasonableexplanationonthelargemagnitudeenhancementofviscositywiththeincreasingofpolymerconcentration.Additionaldataof2DNOESYandfluorescenceshowthatthecopolymerwithhigherhydrophobecontent(molarfraction≥1%)islikelytoformintra-molecularassociation.

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简介：Thispaperisconcernedwiththetopologicalstructureofefficientsetsforoptimizationproblemofset-valuedmapping.Itisprovedthatthesesetsareclosedorconnectedundersomeconditionsoncone-continuity,cone-convexityandcone-quasiconvexity.

简介：Thediscoveryofdrawablecarbonnanotubeforestsopenedupthepossibilityofconstructingawiderangeofpurecarbonnanotubemacrostructuresandsparkedinterestsindevelopingapplicationsfromthesestructures,especiallypurecarbonnanotubeyarns.Thisreviewexaminesthevariousfacetsofthedrawablecarbonnanotubeforests,synthesisanddrawability,andtheirresultingyarns,structure,production,propertiesandapplications.Thestructure,formationandpropertiesofcarbonnanotubeyarnsarecomparedwiththoseofconventionaltextileyarnsinordertoobtainabetterunderstandingofthescience,structuralmechanicsandprocessingtechnologyinvolvedincarbonnanotubeyarns.

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简介：Theultrasonicmotor(USM)possessesheavynonlinearitieswhichvarywithdrivingconditionsandload-dependentcharacteristicssuchasthedead-zone.Inthispaper,anidentificationmethodfortherotarytravelling-wavetypeultrasonicmotor(RTWUSM)withdead-zoneisproposedbasedonamodifiedHammersteinmodelstructure.ThedrivingvoltagecontributingeffectonthenonlinearitiesoftheRTWUSMwastransformedtothechangeofdynamicparametersagainstthedrivingvoltage.Thedead-zoneoftheRTWUSMisidentifiedbasedupontheabovetransformation.Experimentresultsshowedgoodagreementbe-tweentheoutputoftheproposedmodelandactualmeasuredoutput.

简介：Themodulationofresonancefeaturesinmicrocavitiesisimportanttoapplicationsinnanophotonics.Basedontheasymmetricwhispering-gallerymodes(WGMs)inaplasmonicresonator,wetheoreticallystudiedthemodeevolutioninanasymmetricWGMplasmonicsystem.Exploitingthegapornano-scatterintheplasmonicringcavity,thesymmetryofthesystemwillbebrokenandthestandingwaveinthecavitywillbetunable.Basedonthisasymmetricstructure,theoutputcouplingratebetweenthetwocavitymodescanalsobetuned.Moreover,theproposedmethodcouldfurtherbeappliedforsensinganddetectingthepositionofdefectsinaWGMsystem.

简介：2-Amino-l,l-diferrocenylethanol2waspreparedbyreductionoftrimethylsilylcyanohydrinetherofdiferrocenylketone.Thecrystalstructureof2wasfurtherdefinedbyX-raydiffraction.

简介：在这篇文章，我们分析最陡峭的降下算法，象不变的subspace计算一样在Hartree-Fock和Kohn假冒的理论部分流行，由orthogonality条件抑制了的三相关preconditioned。我们利用几何学可被考虑歧管，即，关于单一的转变的invaxiance，到再用形式表示象可被考虑的集合歧管的Grassmann上的问题。我们然后在相应Lagrangian的ttessian在在minimizer歧管的Grassmann的正切空间是椭圆形的条件下面证明asymptotical是算法的线性集中。[从作者抽象]

简介：Themethodofnonlinearparabolizedstabilityequations(PSE)isappliedinthesimulationofvortexstructuresincompressiblemixinglayer.Thespatially-evolvingunstablewaves,whichdominatethevortexstructure,areinvestigatedthroughspatialmarchingmethod.Theinstantaneousflowfieldisobtainedbyaddingtheharmonicwavestobasicflow.TheresultsshowthatT-Swavesdonotkeepgrowingexponentiallyasthelinearevolution,theenergytransfertohighorderharmonicmodes,andthatfinallyallharmonicmodesgetsaturatedduetononlinearinteraction.Themeanflowdistortioninducedbythenonlinearinteractionbetweentheharmonicmodesandtheirconjugateharmonicones,makesgreatchangeoftheaverageflowandincreasesthethicknessofmixinglayer.PSEmethodscanwellcapturethetwo-andthree-dimensionallargescalenonlinearvortexstructuresinmixinglayerssuchasvortexroll-up,vortexpairing,andAvortex.

简介：在给定的静电干扰并且动态轴的装载下面的一个precracked双性人材料结构接口的行为是在现在的纸的一个兴趣目标。第一，砍落后模型是一个合适的工具在经历静态的装载的precracked双性人材料结构分析一个分层过程，这被显示出。第二，砍落后模型在动态装载下面被用于结构。为结构的接口分层解决这个问题并且沿着接口决定debond长度，我们的自己的2D边界元素方法(BEM)代码在静态的装载的情况中被建议，并且和Laplace变换和一半分析的计算的砍落后模型在动态装载的情况中被使用。接口层与其它相比作为一个很薄的盘子被假定二。参量(几何、有弹性)debond长度和接口的分析砍应力被做。从2DBEM代码的结果证明了砍落后模型的分析答案的有效性。在动态盒子中，装载特征的影响，即，shear压力和为时间的间隔的debond长度的价值上的频率和振幅变化，被讨论。获得的结果的分析被一个例子说明现代陶器金属合成，也就是金属陶瓷，并且在图描绘了。

简介：察觉到途径的nearfield错误，是在活跃声学的结构的实现遇到的关键问题之一，理论上被调查。基本想法包含一小部分PVDF电影对到为测量总数的主要面板和第二等的面板的表面的boned被散发健全力量。首先，在这份报纸，与活跃声学的结构联系的一个理论模型被建立。第二，为PVDF对的形状系数的公式基于察觉到的模式和PVDF建模的声学的放射被导出。最后，很多计算机模拟被执行，在散发的健全电源的PVDF对和相应减小的形状是结果表明的calculated.The察觉到的建议nearfield错误的可行性策略。

简介：Dual-platestructureisveryeffectiveintheprotectionofspacevehiclefromhypervelocityim-pact.TheexperimentsofA1projectileimpactingA1dualtargetsatthevelocityrangingover2.5—7.0km/sweresystematicallyconducted.Thedamageeffectswereexamined,includingtheperforationoftheshield,thedevelopmentofdebriscloudandthegeneraldamagecharacteristicsofthesubplate.Manyvaluableexperi-mentaldataandphenomenahavebeenobtained

简介：Thestructuraldeformationvelocityplaysasignificantroleinthedynamiccalculationofundergroundblast-resistantstructures.Themotiondifferentiatingequationofastructuresystemtakingintoaccounttheroleofdeformationvelocityofthestructurewilltruthfullydescribetheactualsituationofstructuralvibration.Withtheone-dimensionalplanewavetheory,theexpressionofloadonthestructuralperipheryisdeveloped,andthegeneralizedvariationprincipleforthedynamicanalysisofundergroundarched-barstructuresisgiven.Atthesametime,theresultsofthenumericalcalculationarecompared.

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简介：Atheoreticalstudyofresonanttunnelingiscarriedoutforaninverseparabolicdouble-barrierstructuresubjectedtoanexternalelectricfield.Tunnelingtransmissioncoefficientanddensityofstatesareanalyzedbyusingthenon-equilibriumGreen’sfunctionapproachbasedonthefinitedifferencemethod.Itisfoundthattheresonantpeakofthetransmissioncoefficient,beingunityforasymmetricalcase,reducesundertheappliedelectricfieldanddependsstronglyonthevariationofthestructureparameters.

简介：Inthiswork,westudythephotonicbandofcumulativeFibonaccilattices,ofwhichthestructureiscomposedofallgeneratedunitsinaFibonaccisequence.TheresultsarecomparedwithdistributedBraggreflector(DBR)structureswiththesamenumbersoflayers.Photonicbandgapsarefoundattwocharacteristicfrequencies,symmetricallyseparatedfromthecentralbandgapintheDBRcounterpart.FieldamplitudeandphasedistributionintheFibonaccilatticeindicatesaninterferentialoriginofthebandgaps.Fouriertransformontherefractiveindexprofileiscarriedout,andtheresultconfirmsadeterminatelong-rangeperiodicitythatagreeswellwiththephotonicbandstructure.

简介：Atopologymethodispresentedinthispapertorevealflowtructureoccurringinsieturbomachinery,inwhichnearwallflowstructureisrevealedbyusingwalllimitingstreamilinesandspaceflowfeatureisrevealedbyusingspacestreamilinesandcross-sectionstreamlines,Asanexample,acomputationalthree-dimensionalviscousflowfieldinsideatransonicturbinecascadeisstudied.Throughtheanalysis,theformandevolutionofvortexsystemandthewholeprocessofseparationoccurringwithinthiscascadearerevealed.Theapplicationoftopologymethodforanalyzeflowstructureinsideturbomachinmeryisveryimportantforunderstandingflowfeaturesandmechanismofflowlossevenforimprovingthedesignofturbomachineryandincreasingitsefficiency.

简介：在艾尔，Au，Ag，Cu和Ni的分裂的边脱臼的扩大核心结构在脱臼的格子理论以内被决定。管理排水量的2D脱臼方程被被概括叠的差错精力的parameterization决定的恢复力量联合。夸耀变化方法被介绍解决脱臼方程，试用答案被二arctan类型功能与二个未经决定的参数组成。部分脱臼的核心宽度比由于水晶的组件的考虑在概括Peierls-Nabarro模型获得了的宽。