简介:在这份报纸,概括Dodd-Bullough-Mikhailov方程被学习。周期的波浪和无界的波浪解决方案的存在被使用动态系统的分叉理论的方法证明。在不同参量的条件下面,保证上述答案的存在的各种各样的足够的条件被给。上述旅行答案的一些准确明确的参量的代表被获得。
简介:我们学习二维(2D)在吝啬地的模型的事波浪solitons在2D空间与远程的quadrupolequadrupole相互作用(QQI)由电的四极粒子形成了。在空间的2D事波浪solitons的存在用2DGrossPitaevskii方程(GPE)被预言。我们发现QQIsolitons比dipoledipole相互作用(DDI)有一个更高的团(更小的尺寸和更高的紧张)和更强壮的anisotropy在一样的环境参数下面的solitons。在在2D空间的二相同QQIsolitons之间的各向异性的solitonsoliton相互作用被学习。而且,稳定的各向异性的偶极子solitons被观察到我们的知识,第一次在在各向异性的非局部的立方的非线性下面的2D空间。
简介:Afloatingtypependulumwaveenergyconverter(FPWEC)witharotaryvanepumpasthepowertake-offsystemwasproposedbyWatabeetal.in1998.Theyshowedthatthisdevicehadhighenergyconversionefficiency.Inthepreviousresearch,theauthorsconducted2DwavetanktestsinregularwavestoevaluatethegeneratingefficiencyofFPWECwithapowertake-offsystemcomposedofpulleys,beltsandagenerator.Asaresult,theinfluenceoftheelectricalloadonthegeneratingefficiencywasshown.Continuously,theloadcharacteristicsofFPWECarepursuedexperimentallybyusingtheservomotorstochangethedampingcoefficientinthispaper.Inalaterpartofthispaper,themotionsofthemodelwiththeservomotorsarecomparedwiththatofthecasewiththesamepowertake-offsystemasthepreviousresearch.Fromtheaboveexperiment,itmaybeconcludedthatthemaximumprimaryconversionefficiencyisachievedashighas98%attheoptimalload.
简介:Inthispaper,anextendedmethodisproposedforconstructingnewformsofexacttravellingwavesolutionstononlinearpartialdifferentialequationsbymakingamoregeneraltransformation.Forillustration,weapplythemethodtotheasymmetricNizhnik-Novikov-VesselovequationandthecoupledDrinfel'd-Sokolov-WilsonequationandsuccessfullycoverthepreviouslyknowntravellingwavesolutionsfoundbyChen'smethod[Y.Chen,etal.Chaos,SolitonsandFractals22(2004)675;Y.Chen,etal.Int.J.Mod.Phys.C4(2004)595].
简介:Aboundaryelementmethodforthree-dimensionalsteadyshipwave-makingpotentialproblemsisestablishedwiththeRankinesoureefunctionasitsfundamentalsolution.Inthetreatmentofthelinearizedfreesurfacecondition,onesided.upstreamfinitedifferenceoperator(FDO)isusedtosuppresstheupstreamwaves,andtheequationofthedisturbancevelocityisestablishedsothatthefirstorderFDOcanbeusedinplaceofthesecondorderFDO.Comparedwiththemethodwiththesec-ondorderFDO,thecurrentmethodgivesbetterprecisionandstability.Numericalexamplesarepre-sentedforverification.
简介:在这份报纸,在范围的稳定的homotopy组的homotopy元素的一个新家庭由n2m5and3s代表了
简介:Weproveseveralinequaliesforsymmetricpostivesemidefinite,generalMmatricesandinverseM-matriceswhicharegeneralizationoftheclassicalOppenheim'sInequalityforsymmetricpositivesemidefinitematrices.
简介:TheauthorfirstreviewstheclassicalKorninequalityanditsproof.FollowingrecentworksofS.Kesavan,P.Ciarlet,Jr.,andtheauthor,itisshownhowtheKorninequalitycanberecoveredbyanentirelydifferentproof.ThisnewproofhingesonappropriateweakversionsoftheclassicalPoincar'eandSaint-Venantlemma.Infine,bothproofsessentiallydependonacruciallemmaofJ.L.Lions,recalledatthebeginningofthispaper.
简介:TheextendedcanonicalNoetheridentitiesandcanonicalfirstNoethertheoremderivedfromanextendedactioninphasespaceforasystemwithasingularLagrangianareformulated.UsingthesecanonicalNoetheridentities,itcanbeshownthattheconstraintmultipliersconnectedwiththefirst-classconstraintsmaynotbeindependent,soaquerytoaconjectureofDiracispresented.BasedonthesymmetrypropertiesoftheconstrainedHamiltoniansysteminphasespace,acounterexampletoaconjectureofDiracisgiventoshowthatDirac'sconjecturefailsinsuchasystem.WepresenthereadifferentwayratherthanCawley'sexamplesandother'sonesinthatthereisnolinearizationofconstraintsintheproblem.Thisexamplehasafeaturethatneithertheprimaryfirst-classconstraintsnorsecondaryfirst-classconstraintsaregeneratorsofthegaugetransformation.
简介:纸论述改进没有元素的Galerkin(IEFG)为三维的波浪繁殖的方法。改进移动最少平方(IMLS)近似被采用构造形状函数,它与一个重量函数把一个直角的函数系统用作基础函数。与常规移动相比最少平方(MLS)近似,在IMLS的代数学的方程系统近似不是性恶的,并且没有导出反的矩阵,能直接被解决。因为比在MLS近似在IMLS有更少系数,更少节点比在没有元素的Galerkin方法在IEFG方法被选择。因此,IEFG方法有更高的计算速度。在IEFG方法,Galerkin弱形式被采用获得一个discretized系统方程,并且惩罚方法被使用强加必要边界条件。为二点的边界价值问题的传统的差别方法为时间discretization被选择。当波浪方程和边界起始的条件取决于时间,可伸缩的参数,节点的数字和时间,步长度为集中学习被考虑。
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