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简介：AmeshlessapproachtoanalysisofarbitraryKirchhoffplatesbythelocalboundaryintegralequation(LBIE)methodispresented.Themethodcombinestheadvantageousfeaturesofallthethreemeth-ods:theGalerkinfiniteelementmethod(GFEM),theboundaryelementmethod(BEM)andtheelement-freeGalerkinmethod(EFGM).Itisatrulymeshlessmethod,whichmeansthatthediscretizationisinde-pendentofgeometricsubdivisionintoelementsorcells,butisonlybasedonasetofnodes(orderedorscat-tered)overadomaininquestion.Itinvolvesonlyboundaryintegration,however,overalocalboundarycen-teredatthenodeinquestion;Itposesnodifficultiesinsatisfyingtheessentialboundaryconditionswhileleadingtobandedandsparsesystemmatricesusingthemovingleastsquare(MLS)approximations.Itisshownthathighaccuracycanbeachievedforarbitrarygeometriesforclampedandsimply-supportededgeconditions.Themethodisfoundtobesimple,efficient,andattractive.

简介：ThecharacteristicsoftheTriassicsequencesdevelopedintheLowerYangtzeareadisplaysomegreatchangesinbothenvironmentandclimate.Thechangeofenvironmentwasatransitionfrommarinetocontinentviaalternatingenvironments.Thechangeofclimatewasatransitionfromtropic(torrid)towarmandwetclimateviasubtropicdryclimate.Thetypevariationsofthesequenceswerefromthemarinesequencestothecontinentalsequences,correspondingtothechangesofenvironmentsandclimates.Sequence1isatypeⅡofsequenceofmixedclasticandcarbonatesediments;sequence2isatypeⅠofsequenceofcarbonateplatform;sequence3isatypeⅠofsequenceofcarbonatetidalflat-saltlagoon,sequence4isatypeⅡofsequenceoflacustrinewithinmarinelayers,andsequence5isasequenceoflacustrine-swamp.Thedevelopment,distributionandpreservationofthosesequencesrevealthetectoniccontrolsandtheirchangesinthebackground.ThecollisionbetweentheYangtzeplateandtheNorthChinaplatewasagreatgeologicaleventinthegeologicalhistory,butthetimingofthecollisionisstilldisputed.However,thecharacteristicsofTriassicsequencestratigraphyandsealevelchangesintheLowerYangtzearearespondedtothiscoliision.ThecollisionstartedatthebeginningofmiddleTriassicandthegreatregressionintheLowerYangtzeareastarted22Maearlierthanthoseintheworld.Thetectonicconditionsoccurredbeforeandduringthecollisioncontrolledthedevelopmentofsequencesandtypechanges.

简介：Theeffectofdiffusiononthermoelasticthinplatesisinvestigated.Thegoverningequationsforthinthermoelasticdiffusionplatesunderthreedifferentlawsofheatanddiffusiontransmissionarederived.BytheC0-semigrouptheory,thewell-posednessoftheproposedequationsisshown.

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简介：Hydrodynamiccharactersonahorizontal,thin,rigidplatelocatedbeneaththefreesurfacearenumericallyinvestigated.Assumingalinear,time-harmonicpotentialflowandutilizingGreenidentity,thegoverningLaplaceequationcanbesimplifiedintoFredholmintegralequationofthesecondkind.Supposinglinear-orderdiscontinuouselementsalongintersectingverticalboundaries,andbyuseoftheboundaryelementmethod,numericalsolutionaboutsourcestrengthdistributionontheplatecanbechangedintoaseriesofalgebraicequations.The3DGreenfunctionisintroducedtosetuptheintegralequations,andtheGMRESsolverisperformedforsolvingthelargedenselinearsystemofequations.Theadded-mass,dampingforceandexcitingforceareevaluateddirectlyfromtheequations.Itisfoundthattheadded-masscoefficientbecomesnegativeforarangeoffrequencieswhentheplateissufficientlyclosetothefreesurface.

简介：三明治板系统(SPS)被预付开始在海军的建筑学和海洋工程收到了广泛的注意的材料。根据分类社会的规则，目前，壳和稳固的元素的混合物被要求模仿SPS。基于僵硬分解的原则，为壳元素的一个新数字模拟方法被建议。根据僵硬分解的原则，全部的僵硬能被分解成弯曲僵硬并且砍僵硬。与把僵硬弄弯有关的排水量和压力反应与把压成薄片的壳元素被计算。排水量和压力反应由于砍被计算代码的使用计算由FORTRAN语言写。然后，为SPS的全部的排水量和压力反应被一起增加全部的排水量和应力的这二部分获得。最后，一个矩形的SPS盘子和双底部结构被用于模拟。在论文建议的元素模仿的偏转比一样大的结果表演根据Hoff理论由稳固的元素和分析溶液模仿了并且对壳固体元素的混合模仿的一样近似，并且在论文建议的元素模仿的压力对另外的模仿的方法近似。那么与计算相比基于壳和稳固的元素的混合物，在论文给的数字模拟方法对更有效、更容易。

简介：Thispaperdescribesthebenefits,technicaldifficultiesanddisadvantagesofthecurrentheavyreductionsolutionsforplateproduction.Forupdatedplatemills,thispapergivesabetterideafortheheavyreductioncontrolintherollingprocess.Thatistokeepthereductionamountconstantinthefront-endandback-endsectionsoftheplateandtoadopttaperedrollingwithvariablereductioninthemiddlesectionoftheplate.Thissolution(alreadyappliedforapatent)cannotonlyfullyutilizethecapacityofthemillmotors,butalsopreventdifficultiesinplatebitingcausedbytheconventionalheavyreductionsolutionswithexcessivedraft.Thistechnicalsolutionhasbeenimplementedatthe5mplatemillplantofBaosteel,andindustrialtestshaveprovedthefeasibilityofit.Thispaperpresentsandanalyzestheindustrialtestdataandprovesthatthetaperedheavyreductiontechnologycanreducethenumberofrollingpasses.Inaddition,thispaperlooksforwardtothefutureresearchinthisarea.

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简介：Thewavetransmissioncharacteristicsandwaveinducedpressuresontwinplatebreakwaterareinvestigatedexperimentallyinregularandrandomwaves.Atotaloftwentypressuretransducersarefixedonfoursurfacesoftwinplatetomeasurethewaveinduceddynamicpressures.Thespatialdistributionofdynamicwavepressureisgivenalongthesurfaceofthetwinplate.Theupliftwaveforceobtainedbyintegratingthehydrodynamicpressurealongthestructureispresented.DiscussedaretheinfluenceofdifferentincidentwaveparametersincludingtherelativeplatewidthB/L,relativewaveheight/iHaandrelativesubmergencedepths/aonthenon-dimensionaldynamicwavepressuresandtotalwaveforces.Fromtheinvestigation,itisfoundthattheoptimumtransmissioncoefficient,tKoccursaroundB/L0.41~0.43,andthetwinplatebreakwaterismoreeffectiveindifferentwaterdepths.Themaximumofpressureratiodecreasesfrom1.8to1.1whentherelativesubmergencedepthoftopplateisincreasedfrom0.8to+0.8.

简介：这份报纸为TRUNC板元素的错误估计提供简化推导。为有混合边界条件的问题的错误分析也被讨论。[从作者抽象]

简介：Theinfluenceofairgapsontheresponseoftransmissionforatransverse-electricmodeparallel-platewaveguide(TE-PPWG)withasinglecavityanddoublecavitieshasbeenstudiedexperimentally.Astheairgapislargerthantheresonantwavelengthofhighordercavitymodeinthesingledeepgroovedwaveguide,onlythefundamentalcavitymodecanbeexcitedandsingleresonancecanbeobservedinthetransmissionspectrum.Basedonaboveobservations,atunablemultibandterahertz(THz)notchfilterhasbeenproposedandthevariationofairgaphasturnedouttobeaneffectivemethodtoselectthebandnumber.Experimentaldataandsimulatedresultsverifythisbandnumbertunability.Thismechanicalcontrolmechanismforelectromagneticinducedtransparency(EIT)willopenadoortodesignthetunableTHzdevices.

简介：在在一个混合系统的联合分系统之间的精力转移的学习为应用是很重要的。这篇论文在免费横过的颤动论述在一个visco有弹性地连接的双板系统的盘子之间的精力转移的分析分析。在盘子之间的粘弹性的连接为在时间功能的二频率的政体的外观负责的分析分析表演，它对应于一个eigen振幅一个模式工作，并且也，时间不同颤动模式工作，这被解开，但是在在一个eigen模式的盘子之间的精力转移出现。它为颤动的每形状被显示出。相应于一个eigen振幅模式的二个Lyapunov代表的系列被使用相应eigen振幅时间部件的精力表示。

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简介：这篇论文论述一个有弹性地连接的双板系统的免费、强迫的横过的颤动的分析、数字的分析。联合部分微分方程的一个系统的分析答案，描述相应动态免费、强迫的过程，用Bernoulli的特别积分和Lagrange变化常数的方法被获得。因为强迫的颤动由一个频率导致了外部刺激和相应起始的条件，一个模式颤动才为起始的条件并且到三频率的政体导致的免费颤动对应于二频率的政体。分析解决方案证明在盘子之间的有弹性的连接导致时间功能的二频率的政体的外观，它对应于一个模式的一个eigenamplitude函数，并且也，时间不同颤动模式工作，这为颤动的每形状被解开。它为两块有弹性地连接的板被证明了那，为每m和n，为回声的外观的二可能性动态状态，以及为动态吸收的外观，是在场的。用MathCad程序，整个时间的板中间表面的典型形式的相应可视化被介绍。

简介：AnoveloffsetFresnelZonePlatereflectorAntenna(FZPA)isproposed,thephasecorrectingzoneofthisFZPAiselliptic.BasedonPhysicalOpticsMethod,thefocusingcharacteristicsofthereflectorareanalyzed.ThecomparisonofthisnewFZPAwiththecircularFZPAandMawzonesFZPAismade.

简介：在一个磁场使击碎的磁电的身体变形在裂缝附近导致一个使不安的磁场。在在裂缝附近的这块使不安的地和压力之间的量的关系在开发基于磁力的非破坏性的测试技术的新一代是关键的。在这份报纸，使不安的磁场的分析表情由在一个弱外部磁场包含一个集中的裂缝的一个无限的铁磁性的有弹性的盘子的结构的变丑导致了被使用线性化的磁电的理论和Fourier变换方法获得。主要发现是使不安的磁场紧张与应用张力的压力成正比，并且被排水量坡度在磁电的固体的边界上统治。裂缝附近的使不安的磁场的紧张的正切的部件沿着越过它的二张脸严厉地颠倒它的方向的裂缝展出反对称的分布，当正常部件在裂缝尖端与单个点沿着裂缝显示出对称的分布时。

简介：惰性的金属炸药，炸药的一种新类型，是高爆炸、惰性的金属粒子的混合物。当这种炸药被触发时，惰性的金属粒子流动将被开车的爆炸产品形成。为了决定金属粒子的运动的特征，流动，一系列铝盘子被设计是金属粒子流动影响了的目标。测试结果被介绍，一个数字模型被设置分析高速度的影响铝板上的惰性的金属粒子。基于数字分析，在目标板和惰性的金属粒子的起始的条件上的标记的特征之间的关系被建议。从目标盘子上的影响的分析，金属粒子的运动的更多的信息能被重建。

简介：Sometimesmaindrivermotors’torqueexceedsthemaximumlimitinBaosteel’s5mheavyplatemill.Experienceshowedthattorqueoverloadedoccurredincasesofsomespecialrollingsequenceandspecialrollingplatedimension.Mostoftheoverloadedoccurredonlyinstantaneousatsometimepointduringtherollingpass,whichespeciallyeasilyhappenedatthebiteandmotoraccelerationtimeafterthebite.Thispaperanalyzestheimpactfactorsformotortorqueoverloadandcarefullystudiesthekeydetailsofthemillrollingspeedcontrol.Thesolutiontoimprovethespeedcontrolwasgivenatthepreconditionofkeepingproductionyield.Theimplementationofthesolutionsignificantlyreducedtheoccurrenceoftorqueoverloadedtimes.