简介:在这个工作,一条新途径为与紧张构造花键被建议。基本想法在分布理论的使用,它允许我们定义紧张花键在最小化一些精力的合适的Hilbert空格功能。花键的古典直角的条件和描述以一个微分操作符的一个基本解决方案被提供。紧张花键的一个明确的代表被给。紧张花键能被解决一个线性系统计算。一些数字例子被给说明这条途径。
简介:Inthispapertheresultsofahigh-speedtensionexperimentoftheSiC_w/Alcompositehavebeenreportedandasimplifiedtheoreticalmodelhasbeendevelopedtostudythefracturemechanismofcompositesinhigh-speedtension.Thistheoreticalmodelprovidesanewexplanationfortheincreaseofdynamicfracturestrengthofcompositesinhigh-speedtension.
简介:ThesolutionfortheDuffingequationinanonlinearvibrationproblemisstudiedinthispaper.Clearly,inthecaseoftheperturbparameterbeingalargervalue,thetraditionalperturbationmethodisnolongervalidbuttheHomotopyPerturbationMethod(HPM)isapplicableusually.HPMisusedtosolvetheweakandstrongnonlineardifferentialequationsforfindingtheperturbedfrequencyoftheresponse.TheobtainedfrequenciesviaHPMandtheapproximatemethodhavegoodaccordanceforweakandstrongnonlineardifferentialequations.Additionally,thecalculatedresponsesbyuseoftheapproximatemethodarecomparedwiththeresponsesobtainedfromtheNumericalmethodinthetimehistoryoftheresponseandphaseplane.Theresultsrepresent~oodaccordancebetweenthem.
简介:Ageneralizednon-stationarycurvesubdivision(GNSforshort)schemeofarbitraryorderk≥3withaparameterhasbeenproposedbyFangetal.inthepaper(FangMei-eetal.,CAGD,2010(27):720-733).IthasbeenprovedthattheproposedschemeoforderkgeneratesCk-2continuouscurvesfork≥4.Buttheproofofthesmoothnessinthispaperisuncompleted.Moreover,theC1-continuityofthethirdorderschemehasnotbeendiscussed.Forthisreason,inthispaper,weprovideafullcorrectedproofofthesmoothnessoftheGNSschemeoforderkfork≥3.
简介:Wesolvethelocaluniaxialtensionofaninfiniterodintheframeworkofnon-ordinarystate-basedperidynamics.Thesingularsolutionsofstressanddisplacementareacquired.Whentheinfluencingrangeofthewindowfunctionapproacheszero,thesetwosolutionswillreturntothesolutionsoftheclassicalelasticity.Theanalysisshowsthatthesingularitiesofthesolutionsstemfromsuchafeatureofthewindowfunctionthatmustberepresentedbyarapidlydecreasingfunctioninphysics.Contrarytotheclassicalelasticity,thestresssolutionofperidynamicsissmootherthanthedisplacementsolution.Inaddition,acriterionusedtoselectthewindowfunctionisproposedinthispaper.
简介:Mechanosensitive(MS)ionchannelsplayanimportantroleinvariousphysiologicalprocesses.Althoughthedeterminationofthestructureofmechanosensitivechanneloflargeconductance(MscL)makesthesimulationstudypossible,ithasnotsofarbeenpossibletodirectlysimulatethegatingmechanismofMscLinatomicdetail.Inthisarticle,MscLhasbeenstudiedviamoleculardynamic(MD)simulationstogainadetaileddescriptionofthesensitivitytolateraltensionandthegatingpathway.MscLundergoesconformationalrearrangementinsustaininglateraltension,andtheopenstateisobtainedwhen2.0MPalateraltensionisdirectlyappliedonthepureprotein.Duringtheopeningprocess,Loopregionrespondstotensionfirst,andthemechanicalsensitivityisfollowedbyS1domain.Transmembrane(TM)bundleisthekeypositionforchannelopening,andthemotionofTM1helicesfinallyrealizesthesignificantexpansionoftheconstrictedgatingpore.C-terminusdomainpresentsexpansionlaterduringtheTMopening.Inourstudy,returnofthewholeproteintotheinitialclosedstateisachievedonlyintheearlyopeningstage.Duringtherelaxationfromtheopenstate,theTMhelicesarethemostmobiledomain,whichisdifferentfromtheopeningprocess.
简介:为与不同装载计算打电报的结构的压力和紧张状态的一个理论模型在这份报纸被开发了。我们解决这个问题为第一--?并且有张力或弯曲的紧张的秒阶段电报。在海滨之间的接触和磨擦力量被二维的接触模型介绍。当三位字节使遭到了到张力的紧张时,几个理论模型被建议了验证结果,包括接触力量,接触压力,和机械损失。装载将影响磨擦力量和三位字节的机械损失,这被发现。结果证明接触力量和机械损失依赖于扭曲沥青。更短的扭曲程度能导致更高的接触力量,当有扭曲沥青的机械损失的趋势是复杂的时。机械损失可以被相当调整扭曲沥青减少。现在的模型提供一个简单分析方法调查机械行为在在不同负担下面多级式结构。
简介:在这篇文章,有关表面和界面的紧张的试验性的大小跟随简短介绍,为为二进制代码计算表面紧张和表面分离的方法,第三,并且多部件高温度基于蝇绳融化“soriginal处理并且在可得到的物理性质和热力学的数据上,特别体积阶段和表面阶段对温度的免费精力从热力学的数据库获得了使用相图(CALPHAD)的计算的excessGibbs来临,与到模型参数β的特殊注意,被描述了。另外,几何模型能被扩大预言表面紧张多亚二进制代码系统的从那些的部件系统。在nanoparticle系统的二元合金的Forillustration,一些计算例子,包括的Pb免费的焊接系统和phase-diagramevaluation被给。根据紧张ofhigh温度融化的表面,在象moltens一样的液体合金和熔融的炉渣之间的界面的紧张落后,熔融的物质能用Girifalco好的方程是计算的。修正在Nishizawa被建议“为在液体金属(A)/ceramics(MX)的界面的紧张的评价的s模型系统以便计算能基于潜水艇晶格模型和热力学的数据被执行,没有故意在高温度区分MX的阶段。最后,为预言在thehigh温度多部件之间的界面的紧张的一个近似表达式的推导融化,雇用贝克尔“与蝇绳一起的s模型”sequation和简单系统的界面的紧张数据被描述,并且有关焦性没食子酸的一些例子冶金系统为更好理解被给。
简介:Inrecentyears,thezero-spantensiontechniqueofpaperandpulp-makingindustrywasappliedtowoodindustryforindirectlytestingthelongitudinaltensilestrengthoftracheids.Inthispaper,thistechniquewasusedtotestthelongitudinaltensionstrengthoftracheidsforChinesefirspecimenswithdifferentwidths.Theresultsshowedthataveragetensionstrengthwas357.39MPa.Theorderofaveragetensionstrengthoftracheidswas:3mm>12mm>6mm>9mm>7.5mm.But,earlywoodsamplesfrequ...
简介:WiththeredesignedjigsfortheThermecmastor-Zthermalsimulator,thefeasibilityofusing3kindsofGleeblespecimensintheThermecmastor-Zsimulatorwasinvestigated.ResultsshowthatGleeblespecimenscanbeusedintheThermecmastor-Zsimulator.ThetensiontestsintheGleebleandThermecmastor-Zsimulatorsproducedresultswiththesametrend,whichprovesthatthehightemperatureductilityofGleeblespecimenscanbereflectedbytheThermecmastorZsimulator.Inaddition,astheThermecmastor-Zsimulatoroffersawiderheatingzone,bettercross-sectionshrinkageandelongationofspecimenscanbeachievedunderthesametestconditions.
简介:Oneoffundamentalbutdifficultproblemsindamagemechanicsistheformulationoftheef-fectiveconstitutiverelationofmicrocrack-weakenedbrittleorquasi-brittlematerialsundercomplexloading,especiallywhenmicrocrackinteractionistakenintoaccount.Thecombinationofphenomenologicalandmi-cromechanicaldamagemechanicsisapromisingapproachtoconstructinganapplicabledamagemodelwithafirmphysicalfoundation.Inthispaper,aquasi-micromechanicalmodelispresetedforsimulatingthecon-stitutiveresponseofmicrocrack-weakenedmaterialsundercomplexloading.Themicrocrackingdamageischaracterizedintermsoftheorientationdomainofmicrocrackgrowth(DMG)aswellasascalarmicrocrackdensityparameter.TheDMGdescribesthecomplexdamageanditsevolutionassociatedwithmicrocrackgrowth,whilethescalarmicrocrackdensityfactordefiningtheisotropicmagnitudeofdamageyieldsaneasycalculationoftheeffectsofmicrocrackinteractiononeffectiveelasticmoduli.
简介:Theductilityofthinmetalfilmsonpolymersubstratesreportedinrecentexperimentshasahugedisparity,rangingfromlessthan1%uptomorethan50%.Torevealtheunderpinningoriginsforsuchalargevariation,thispaperreportsasystematiccomputationalstudyoftwocompetingfailuremechanisms:metalfilmneckingandgrainboundarycracking.Thequantitativeresultssuggestthatstronggrainboundariesandmetal/polymerinterfacialadhesionarekeystoachievehighductilityofpolymer-supportedme...
简介:Anewgratingstructurewithcladdingetchedasthesinusoidalfunctionalongthelengthdirectionisintroduced.Thecladdingareaofthegratingvariesasthesinusoidalfunctionalongfiberaxes.Thecoupledmodetheoryisusedtoanalyzeitsperformance.Comparedwiththelinearlychirpedgrating,thenewstructureexhibitsanidealboxspectrumwithsteepedgeswhenthetensionisappliedonthegratingsintwodifferentways.ForthetypeBgrating,withouttensionafterwriting,ithasabiggerbandwidthutilization(BWU)thanthatofthetypeAgratingwithtensionafterwriting.ComparedwiththetypeAgrating,thetypeBoneismoreadaptableinfiber-opticcommunicationsandsensorsystems.
简介:目的将评估可行性和由K电线和紧张乐队电线固定对待sternoclavicular关节脱臼的治疗学的效果,并且改进这种技术的安全和稳定性。这研究与平均数由9个盒子,6男性和3女性组成了的方法25年变老(范围,9-62年)。原因是在7种情况中的交通事故,掉在在1种情况中的1种情况和战斗里。到操作的从损害的持续时间是到7天的2个小时。有5左脱臼和4正确脱臼;8前面的脱臼和1以后的脱臼,包括一个与左olecranon骨折与左肩胛骨折和破裂结合了。用K电线和紧张乐队电线的开的减小和内部固定被执行对待脱臼。结果所有病人被跟随在上面为6~24个月,10个月平均。根据Rockwood手术后的sternoclavicular关节上的等级规模,8个盒子与13.88的一个平均分数完成了优秀结果,并且剩余的盒子与12的分数完成了好结果。解剖减小在所有情况中被获得。象严重感染没有如此的手术后的复杂并发症,对血容器和神经的损害,固定的失败,等等。病人们都对解剖减小和功能的恢复满意。K电线和紧张乐队电线固定的技术是保险箱的结论,简单,有效,不太侵略并且成功地在矫形外科被使用了。它在尽管它有一些劣势,对待sternoclavicular关节脱臼是有效的。