简介：-Thevariationoftheamplitudeofwaveswithvaryingincidentangleswhenwavespropagatethroughatypicalapproachchannelisdiscussedbyanumericalcalculationmethod,theresultofwhichshowsthattheinfluenceofthechannelonwavepropagationisobvious.Whenthewavepropagationdirectionisincoincidencewiththechannelaxis,thewaveamplituderatiowilldecreasewiththeincreaseofpropagationdistance.Whentheincidentangleis15-30,thereappearsanareaoflargerwaveamplituderatioonthesideslopefacingthewaves,butattheanotherside,thewaveamplituderatioisgenerallysmall,indicatingthatthechannelhasashieldingeffect.Whenwavespropagateacrossthechannelperpendicularly,thewaveamplituderatiocanbecalculatedwiththeshallowwatercoefficient.

简介：为了学习水动力学，在免费表面，数字模拟和开水的实验的一个推进器的性能与改变推进器的柄深度被执行。平静的水里的戳和转矩系数上的一个推进器的柄深度的影响主要被学习。同时，这篇论文也由实验和理论计算方法在特殊工作条件下面学习推进器空气摄取，并且比较计算结果和试验性的结果。结果证明在这篇论文使用的理论计算模型能成功地模仿推进器空气摄取。成功的现象模拟提供一个必要理论基础理解推进器空气摄取的物理本质。

简介：用为水质量的遥感技术，评估是在海洋的环境监视的一个不可避免的趋势。然而，水质量参数的更少范畴能被遥感技术比35在GB3097-1997海洋的水质量标准指定的监视。因此，我们考虑了哪个参数必须被遥感选择并且怎么用有限参数为水质量评估当模特儿。在这篇论文，集中了于Leizhou半岛nearshore水，我们发现了N，P，货到付款，PH并且做是由分析测量数据的水质量的主导的参数。然后，数学统计被用来决定在五个参数之中的关系是货到付款>>P>N>pH。最后，五参数，fourparameter和三参数的水质量评估模型被建立并且比较。结果显示出那货到付款，，P和N是为Leizhou半岛nearshore水质量，和最佳的全面的水质量的遥感评估的必要参数评估模型fourparameter模型。这个工作可以为由遥感监视另外的海洋的水的质量用作一本参考书。

简介：Themodifiedhybridelementmethod(MHEM)isutilizedtopredictandanalyzewaveforcesonarbitrarilyshapedmultiplebodies.Thismethodcanbeappliedtowavesofallwaterdepths,i.e.shallow,intermediate,anddeepwaters,onslowlyvaryingseabed.TheMHEMemploystheICCGmethodtosaveCPUandstorage,thusthecomputationofwaveforcesforlargemulti-bodysystemscanbecarriedoutonmicrocomputers.Numericalresultsofthepresentmethodarecomparedwithexperimentaldataandothersolutions.ItisshownthattheMHEMprovidesmoreaccuratesolutionsofthewaveforcesthanothernumericalmethodsdo.Therefore,themethodologypresentedhereincanbeusedinthedesignofcoastalandoceanstructures.

简介：Inthispaper,thecharacteristicsofdifferentformsofmildslopeequationsfornon-linearwaveareanalyzed,andnewnon-lineartheoreticmodelsforwavepropagationarepresented,withnon-lineartermsaddedtothemildslopeequationsfornon-stationarylinearwavesanddissipativeeffectsconsidered.Numericalsimulationmodelsaredevelopedofnon-linearwavepropagationforwatersofmildlyvaryingtopographywithcomplicatedboundary,andtheeffectsarestudiedofdifferentnon-linearcorrectionsoncalculationresultsofextendedmildslopeequations.Systematicalnumericalsimulationtestsshowthatthepresentmodelscaneffectivelyreflectnon-lineareffects.

简介：ManyobservationsshowthatintheYellowSeainternaltidalwaves(ITWs)possesstheremarkablecharacteristicsofinternalKelvinwave,andintheSouthYellowSea(SYS)thenonlinearevolutionofinternaltidalwavesisoneofthemechanismsproducinginternalsolitarywaves(ISWs),whichisdifferentfromthegenerationmechanisminthecasewherethesemidiurnaltidalcurrentflowsovertopographicdrops.Inthispaper,themodelofinternalKelvinwavewithcontinuousstratificationisgiven,andanelementarynumericalstudyofnonlinearevolutionofITWsismadefortheSYS,usingthegeneralizedKdVmodel(GKdVmodelforshort)foracontinuousstratifiedocean,inwhichthedifferenteffectsofbackgroundbarotropicebbandfloodcurrentsareconsidered.Moreover,theparameterizationofverticalturbulentmixingcausedbyITWsandISWsintheSYSisstudied,usingaparameterizationschemewhichwasappliedtonumericalexperimentsonthebreakingofISWsbyVlasenkoandHutterin2002.Itisfoundthattheverticalturbulentmixingcausedbyinternalwavesisverystrongwithintheupperlayerwithdepthlessthanabout30m,andtheverticalturbulentmixingcausedbyISWsisstrongerthanthatbyITWs.