简介：Inrealseastates,damageincidentsonoffshorefloatingstructuresarenotduetothewholetimeseriesofwaveelevationcharacterizedasstatisticalonebutduetofewextremewavesorwavegroupsinirregularwavetrain.So,usingCFDtoolstopreciselysimulatepredeterminedirregularwavetrainwilllaysoundbasisforunderstandingthelocalcharacteristicoftheflowfieldandimpactloadsonoffshorefloatingstructureswhendamageincidentsoccur.Inthisarticle,thegenerationofsingleextremewaveisinvestigatedinanumericalwavetank.First,experimentalirregularwavetrainisdecomposedintocertainnumberofsmall-amplitudewaves.TheFourierseriesexpansionisperformedtodeterminetheamplitudeandinitialphaseangleofeachwavecomponent.Ahydrodynamictransferfunctionisusedtocalculatetheamplitudeofwave-makermotionassociatedwitheachwavecomponent.Thensuperpositioniscarriedoutonallofthewave-makermotioncomponentstogetthefinalwave-makermotion.Withthewave-makermotionasinput,simulationofthesingleextremeirregularwavetrainismodeledsuccessfully.Thenthemethodisappliedtosimulatingamuchmorecomplicatedirregularwavetrain.OnceagainmainfeaturesofthecomplicatedirregularwavetrainarereproducedcomparedwithexperimentcarriedoutinthenewdeepwaterexperimentalbasinatShanghaiJiaoTongUniversity.Inthesimulation,dynamicmeshmethodisenabledtomodelthepiston-typewave-maker,theVolumeOfFluid(VOF)methodisemployedtocapturethefreesurfaceandadissipationzoneisintroducedtodealwithwavereflection.

简介：ThispaperisdevotedtoproblemsstatedbyZ.ZhouandF.Liin2009.Theyconcernrelationsbetweenalmostperiodic,weaklyalmostperiodic,andquasi-weaklyalmostperiodicpointsofacontinuousmapfanditstopologicalentropy.Thenegativeanswerfollowsbyourrecentpaper.Butforcontinuousmapsoftheintervalandothermoregeneralone-dimensionalspaceswegivemoreresults;insomecasestheanswerispositive.

简介：真实波浪是multidirectional波浪。在现在的学习，为为产生multidirectional的开车信号挥动的波浪制造者的计算方法在物理波浪盆组织被建议。它的有效性被事件边界条件被建议方法的使用为决定的一个数字模型首先证实。然后，multidirectional波浪组的物理模拟在实验室波浪盆被执行。multidirectional飘动与的试验性的结果表演期望波浪groupiness，它包括不仅它的组高度而且它的组长度，能令人满意地在物理波浪盆在指定位置被产生。

简介：-Thispaperpresentsacalculationmethodforthediffractionofbothregularwavesandirregularwavesofthesingledirectionalfrequencyspectrumbehindasinglejettywithatheoreticalanalysis,whichhasbeenconfirmedthroughthemodelexperiments,derivesamethodofcomputingthediffractedirregularwavesbehindthesinglejettywiththetheoreticalanalysisonthebasisofcomputationofthefielddataandgivestheformulasandthefiguresofthecomputationofwavediffractionsbehindtheverticalwallormoundsinglejetties.

简介：Thecoefficientofdeffractionofregularwavesbehindthedoublejettyhasbeencomputedinthispaperatfirstbyusingthesingularitydistributionmethod.Themodeltestsconductedfordiffractionofirregularwaveswithaunidirectionalfrequencyspectrumhaveconfirmedgoodagreementbetweenthedatameasuredinexperimentsandtheresultscomputedbythesingularitydistributionmethodplusthelinearsuperpositionmethodfortheenergyofcomponentwavesinthedirectionalfrequencyspectra.Therefore,thistechniqueforcomponentwavesinthedirectionalspectrahasbeenfurtherusedtocomputediffractionofirregularwavesofmultidirection,includingtheemploymentofadirectionaldistributionfunctionofthecos2type,aswellastheBretschneider-Misuyannfrequencyspectrum.

简介：Aseriesofhydraulicmodeltestsarecarriedouttoinvestigaterandomwaverun-upandovertoppingonsmooth,impermeablesingleslopeandcompositeslope.Basedontheanalysisoftheinfluencesofwavesteepness,structureslope,incidentwaveangle,widthofthebermandwaterdepthonthebermandthewaverun-up,empiricalformulasforwaverun-upondikeareproposed.Moreover,empiricalformulaonestimatingthewaverun-uponcompositeslopewithmultiplebermsispresentedforpracticalapplicationofcomplexdikecross-section.Thepresentstudyshowsthattheinfluencefactorsforwaveovertoppingarealmostthesameasthoseforwaverun-upandthetrendofthewaveovertoppingvariationwithmaininfluenceparametersisalsosimilartothatforwaverun-up.Thetrendofthewaveovertoppingvariationscanbewelldescribedbytwomainfactors,i.e.thewaverun-upandthecrestfreeboardofthestructure.Anewpredictionmethodforwaveovertoppingisproposedforrandomwaves.Theproposedpredictionformulasareappliedtocasestudyofoverfortycasesandtheresultsshowthatthepredictionmethodsaregoodenoughforpracticaldesignpurposes.

简介：Ｔｈｅｅｆｆｅｃｔｏｆｌｏｃａｌｉｒｒｅｇｕｌａｒｔｏｐｏｇｒａｐｈｙｏｎｓｅｉｓｍｉｃ　ｇｒｏｕｎｄ　ｍｏｔｉｏｎＪＩＧ－ｈｏＬＩＵ（刘晶波）（ＤｅｐａｒｔｍｅｎｔｏｆＣｉｖｉｌＥｎｇｉｎｅｅｒｉｎｇ，ＴｓｉｎｇｈｕａＵｎｉｖｅｒｓｉｔｙＢｅｉｊｉ...

简介：-Thehydrodynamiccoefficientsforeachoftwopilesandthreepilesinbothside-by-sidearrangementandtandemarrangementundertheactionofirregularwavesareexperimentallyinvestigated.ThesecoefficientsvarywiththeKCnumber,therelativepilespacing,thenumberofpilesandthepilelocation,andtheirrelationshipsarepresentedinthispaper.TheycanbeusedinMorisonEquationandotherequationstocalculatedirectlythein-linewaveforcesandthetransverseforcesoneachpileinarray.

简介：在一个复杂不规则的区域把信息标记是在表金属和将部分地有益的家具工业经常发生的一个有用过程管理。快基于代码的labeler(FCBL)被建议在这篇论文完成这个目的。区域是第一discretized，然后由1D代码由为提供2D编码技术的弗里曼编码地区性的信息，冗余性省略了。我们提高编码计划为我们的复杂问题使它更合适。基于代码，寻找算法被设计并且能与设定的限制被扩大。由介绍一个聪明的最佳的方向评价，另外，FCBL的标记的速度和精确性显著地被改进。有从工业工厂获得的真实数据的一个大范围的实验表明稳定性和FCBL的毫秒级的速度。建议方法集成于一个造船CAD系统，并且在把进程标记的轮船部分起一个很重要的作用。

简介：最当前的地震设计通过反应减小因素(R)包括结构的非线性的反应。这允许设计者当为非线性的行为和变丑的财务限制时，使用一条线性有弹性的基于力量的途径。事实上，反应减小因素在现代地震代码被使用按比例缩小结构的有弹性的反应。这研究集中于为增强的水泥(RC)的设计设计/构造估计实际R价值在Kathmandu的大楼山谷。韧性并且在Kathmandu的代表性的RC大楼编制被调查。非线性的闲差事分析在结构的模型上被执行以便评估大楼的地震表演。有位于Kathmandu山谷的许多特征的12座代表性的设计不规则的大楼被选择并且学习。而且，效果在韧性因素，造的韧性上的横梁列能力比率，和反应减小因素上的负担路径上编制，被检验。最后，结果进一步被分析并且与大楼的不同结构的参数相比。

简介：Two-dimensionalirregularpolygonspackingproblemisverydifficulttobesolvedintraditionaloptimalway.Simulatedannealing(SA)algorithmisastochasticoptimizationtechniquethatcanbeusedtosolvepackingproblems.ThewholeprocessofSAisintroducedfirstlyinthispaper.AnextendedneighborhoodsearchingmethodinSAismainlyanalyzed.AgeneralmoduleofSAalgorithmisgivenandusedtolayouttheirregularpolygons.Thejudgmentofintersectionandotherconstrainsofirregularpolygonsareanalyzed.ThenanexamplethatwasusedinthepaperofStefanJakobsislisted.ResultsshowthatthisSAalgorithmshortensthecomputationtimeandimprovesthesolution.

简介：

简介：AnewmethodisproposedforsurfaceconstructiononirregularquadmeshesasextensionstouniformB-splinesurfaces.Givenanumberofcontrolpoints,whichformaregularorirregularquadmesh,aweightfunctionisconstructedforeachcontrolpoint.TheweightfunctionisdefinedonalocaldomainandisC1continuous.Thenthewholesurfaceisconstructedbytheweightedcombinationofallthecontrolpoints.ThepropertyofthenewmethodisthatthesurfaceisdefinedbypiecewiseC1bi-cubicrationalparametricpolynomialwitheachquadface.ItisanextensiontouniformB-splinesurfacesinthesensethatitsdefinitionisananalogyoftheB-splinesurface,anditproducesauniformbi-cubicB-splinesurfaceifthecontrolmeshisaregularquadmesh.Examplesproducedbythenewmethodarealsoincluded.

简介：Thispaperdiscussestheeffectofbermwidthandelevationofcompositeslopeonirregularwaverun-up.Basedonthedataobtainedfrommodeltests,theformulaanddistributionofirregularwaverun-uponcompositeslopearederived.Thechangingofwindspeed,widthandelevationofthebermareconsideredcomprehensively.Thewaverun-upwithvariousexceedanceprobabilitycanbees-timatedutilizingthedistributioncurvesofirregularwaverun-up.

简介：

简介：这份报纸考虑在一个温和斜坡(1:40)上宣传的不规则的波浪的非线性的转变。不规则的波浪的二个盒子，机械地基于JONSWAP系列被产生，被用于这个目的。结果显示波浪高度服从瑞利分发在近海地点；在变浅的区域，然而，最大的波浪的高度被理论分布低估。在波浪地区，波浪高度能被合成Weibull分发接近。另外，在不规则的波浪以内联合的非线性的阶段被基于小浪的bicoherence调查。bicoherence系列思考参予联合的阶段的频率模式的数字与减少的水深度增加，，，这做阶段联合的度。在早期的碎以后，尽管阶段联合的度减少，很多更高的泛音波浪模式也涉及非线性的相互作用。而且，加的bicoherence显示与最强壮的本地非线性的相互作用有关的频率模式与减少的水深度变到更高的泛音。

简介：

简介：-Amild-slopeequationforcombinedrefractionanddiffractionofrandomwavesintheindependenttimecurrentisderivedusingKirbyequation(1984).Inthederivation,thefrequencyofrandomwavesisrepresentedbasedonthetimeseriesconcept,byatypicalfrequencyanditsdeviationpart.Numericalresults,comparedwiththoseoflaboratoryexperiments,demonstratethatnewsetofirregularmildslopeequationwithcurrentisofgoodadaptability.

简介：一个不规则的分割的区域编码算法基于脉搏，联合神经网络(PCNN)被介绍。PCNN有联合脉搏、可变的阀值，有近似灰色的价值的这些邻近的象素能同时通过被激活的性质。一个人能得出PCNN有的优点认识到地区性的分割，和细节的一个结论原来的图象能被分割图象的参数调整完成，并且同时，小分割的区域能被避免。为不规则的分割的区域的更好的近似，Gram-Schmidt方法，一组orthonormal基底函数被从一组线性独立的起始的底构造工作，被采用。因为重建的orthonormal方法，重构图象的质量能极大地被改进，进步图象传输将也是可能的。

简介：伪椭圆沉箱结构上的不规则的波浪力量的试验性的调查被介绍。不规则的波浪从1.19s与二重要波浪高度，和光谱高峰时期范围基于Jonswap光谱被产生到1.81s。相对多重沉箱的中心线的事件波浪方向从0敢琠敨搠獥慰物漠吗？