简介：Thisletterpresentsanewanalyticalapproximationforwave(current)-induceddynamicsoilresponseinmarinesediments.Inthemodel,thethird-orderapproximationforwave-currentinteractionsisemployedfortheflowmodel,whileBiot’sdynamicporo-elasticmodelisusedtosimulatetheporousflowinaseabed.Thenewlyanalyticalsolutionisvalidatedwiththefieldobservations.Basedonthesolution,effectsofcurrentsandwave-nonlinearityonsoilresponseareexaminedandaparametricstudywillbecarriedouttoexaminetheinfluenceofcurrentsontheliquefactionpotential.

简介：Inthispaper,thecloserelationshipamongwavelettransformandquadraturemirrorfilter(QMF)banksandthescattering-matrixofwavedigitalfilter(WDF)isandlyzedindetail.TheparametrizationoforthonormalcompactlysupportedwaveletbasesthathaveanarbitrarynumberofvanishingmomentisobtainedbybuildinganyQMFpairoutofelementaryfactorsofthescatteringmatrix.Inaddition,theoptimizationofparameterisalsopresented.Ascomparison,Someexamplesaboutorthonormalcompactlysupportedwaveletthathasarbitrarynumberofvanishingmomentandthemostnumberofvanishingmomentaregivenrespectively.Thenwegivetheefficientlatticestructuretoimplementthetransform.

简介：Theconfigurationandaerodynamicperformanceoftheinletsystemareimportantaspectsintheprocessofinstallingagasturbineonanavalvessel.Undertherequirements,largeeddysimulation(LES)isusedtosimulatethethree-dimensionalfluidflowinthewaveblockerofamarineinletfilter.TheSmagorinsky-Lillysub-gridmodelwasusedtomodelmotionsofsmall-scalestructures.Duringnumericalsimulation,theSIMPLEalgorithmwasapplied.Thecentral-differencingspatialdiscretizationschemeandthesecondorderaccuracyfinitedifferenceforthetemporaldiscretizationwereused.Simulationgivessatisfactorydistributionofthevorticityfieldsandturbulentkineticenergy.Comparedwiththek-εturbulentmodel,theresultsofLESarebetterforthedistributionofparameters.Theresultsofexperimentalstudyinasmall-scalewindtunnelindicatethatnumericalcalculationhashigheraccuracy.Therefore,themethodsusedareworthyofreferenceandintroductionforthedesignofaninletsystem.

简介：一个数字模型为由一个改进不可压缩的弄平的粒子在一个水平甲板上模仿波浪影响被建立水动力学(ISPH)。作为一个格子更少粒子方法，ISPH方法广泛地与好精确性在免费表面的水动力学流动被使用了。改进在基于粒子的计算和一个新评价方法为尖动量保存的改进包括校正功能的雇用在水平甲板上预言压力。模拟结果与实验显示出一个好协议。现在的数字模型能被用来在水平甲板上学习波浪影响负担。

简介：

简介：Twodifferentmethodsforincorporatingdiffractioneffectintowaveactionbalanceequationbasedcoastalspectralwavemodels,WABEDandSWAN,arediscussedandevaluatedwithrespecttotheirformulations,numericalimplementations,andmodelingcapabilities.Bothmodelswereruntosimulatethewavetransformationthroughagapbetweentwoinfinitelylongbreakwatersandthatacrossanellipticalshoalobservedinlaboratorystudies,withtheemphasislaidonthediffractioninducedbyeitherobstaclesorwaveamplitudevariations.CalculationsofWABEDwerecomparedwithSommerfeld'sanalyticalsolutions,experimentalobservationsandSWANsimulations.Itisshownthatbothmethodscanpredictreasonablywavediffractionforthetwocasesstudiedherein,andafairlybetterperformanceisprovidedbyWABEDforstrongerdiffractioncase.

简介：在隧道流动由二层组成由底部波动散布飞机表面波浪被假设隧道的床由多孔的材料组成调查。液体的上面的表面被一个僵硬的盖围住，隧道在水平方向是无界的。在那里存在相应于一个内部波浪的一个仅仅波浪模式。为小波动，简化不安分析被用来首先以包含描述底部的形状功能的积分获得顺序思考和传播系数。为正弦曲线底部波动和指数地腐烂的底部地形学，第一命令系数被计算。在正弦曲线底部的情况中，第一个顺序传播系数被发现相等消失。数字结果在很多个数字图形地被描绘。

简介：Thehollow-pipeperforatedbreakwaterisoflowreflection.Inthispaperthefunctionsofreflectioncoefficientsofbothregularandrandomwavesaretheoreticallyderived,basedontheconceptoflinearsuperimpositionofreflectedandincidentwavesandwiththetotalflowratecontinuityofintegralforminsteadofthenon-continuityoftheboundarycondition,andbasedontheconceptoflinearwavespectrumtheory.Comparisonsbetweentheoreticalresultspresentedhereandmeasurementsofmodeltestsshowreasonableagreement.

简介：Throughamappingrelationbetweenthetriplesine-GordonandФ5model,wediscusstheequationindetail.Aseriesofsolitarywavesolutionsforthetriplesine-GordonequationisobtainedbytheexistingonesoftheФ5model.Somedetailedsolitarywavesolutionsaregivenforsomespecialcoefficientswhichhavesignificanceinphysics.

简介：Thispaperconcernsthecalculationofthewavetroughexceedanceprobabilitiesinanonlinearsea.Thecalculationshavebeencarriedoutbyincorporatingasecondordernonlinearwavemodelintoanasymptoticmethod.Thisisanewapproachforthecalculationofthewavetroughexceedanceprobabilities,and,asallofthecalculationsareperformedintheprobabilitydomain,avoidstheneedforlongtime-domainsimulations.TheproposedasymptoticmethodhasbeenappliedtocalculatethewavetroughdepthexceedanceprobabilitiesofaseastatewiththesurfaceelevationdatameasuredatthecoastofYuraintheJapanSea.ItisdemonstratedthattheproposednewmethodcanofferbetterpredictionsthanthetheoreticalRayleighwavetroughdepthdistributionmodel.ThecalculatedresultsbyusingtheproposednewmethodhavebeenfurthercomparedwiththoseobtainedbyusingtheArhanandPlaistednonlineardistributionmodelandtheToffolietal.’swavetroughdepthdistributionmodel,anditsaccuracyhasbeenonceagainsubstantiated.Theresearchfindingsobtainedfromthisstudydemonstratethattheproposedasymptoticmethodcanbereadilyutilizedintheprocessofdesigningvariouskindsofoceanengineeringstructures.

简介：Ellipticequationistakenasanansatzandappliedtosolvenonlinearwaveequationsdirectly.Morekindsofsolutionsaredirectlyobtained,suchasrationalsolutions,solitarywavesolutions,periodicwavesolutionsandsoon.Itisshownthatthismethodismorepowerfulingivingmorekindsofsolutions,soitcanbetakenasageneralizedmethod.

简介：

简介：TherehavebeenseveralmethodsfordeterminingTwave-end.ButnoneofthemcanovercomethedifficultyfrommultiformityofECGsignalpattern.Inthispaper,amethodfordeterminingTwave-endusingevolutionaryalgorithm(EA)isproposed.Inthisway,first,everycharacteristicparameterrelatedtoTwave-endisencodedtoastringofcodes,andadaptationfunctionisconstructedwiththestringofcodes.Thenchoosetheindividualaccordingtotheadaptationfunctionvalueanddogeneticoperation(reproduction,crossoverandmutation),soastoproduceoffspringwithmoreadaptationfunctionvalue.BecauseofEA'sautoadaptationandautoorganizationcharacter,itcantraceECGsignaltypeandfindtheTwave-endautomatically.ExperimentresultsshowthattheerrorratioofrecognizingTwave-endusingthismethodismuchsmallerthanthatusingexistingmethod.

简介：

简介：Themodeloflinearfrequencymodulationcontinuouswave(LFMCW)appliedinunderwaterdetectionandthemethodforthedetectionofechosignalandtheestimationoftargetparameterswerestudied.Byanalyzingtheheterodynesignal,analgorithmwiththestructureofheterodyne-FractionalFourierTransform(FRFT)wasproposed.Toreducethecomputationofsearchingtargetsinatwo-dimensionalFRFTresult.theheterodynesignalwouldbeprocessedbyFRFTataspecificorder,afterRadon-AmbiguityTransform(RAT)wasappliedtoccstimatethesweeprateofthesignal.SimulationsprovedthatthealgorithmcaneliminatethecouplingphenomenonofdistanceandvelocityofLFMCW,andestimatetargets’parametersaccurately.ThelaketrialresultsshowedthattheprocessinggainofLFMCWprocessedbythealgorithminthispaperwas13dBbetterthanthatoftheLFMprocessedbymatchedfilter.TheresearchresultsindicatedthatthealgorithmappliedinLFMCWunderwaterdetectionwasfeasibleandeffective,anditcouldestimatetargets’parametersaccuratelyandobtainagooddetectionperformance.

简介：这份报纸被奉献给在情况n=与小起始的数据在一般非线性的波浪方程的古典答案的lifespan的更低的界限上证明清晰度2并且立方的非线性(在1992看见T.T.李和Y.M.陈的结果)。为这个目的，作者考虑下列Cauchy问题：$\left\{\begin{聚在一起}\squareu=\left({u_t}\right)^3，n=2，\hfill\\t=0：u=0，u_t=\varepsilong\left(x\right)，x\in\mathbb{R}^2，\hfill\\\end{聚在一起}\right.$\left\{\begin{聚在一起}\squareu=\left({u_t}\right)^3，n=2，\hfill\\t=0：u=0，u_t=\varepsilong\left(x\right)，x\in\mathbb{R}^2，\hfill\\\end{聚在一起}\right。

简介：

简介：一种新技术，扩大的人诊所测试技术，被建议寻求integrable系统的周期的独居的波浪解决方案。古典KdV方程的准确周期的独居波浪的解决方案用这种技术被获得。这结果证明它是完全可能的为(1+1)-在那里存在的维的integrable方程一周期独居波浪。

简介：广大学科教师在进行多媒体课件制作时，由于设备条件、制作技术等因素的限制，音频的处理往往不能得心应手，自制的录音产品在音质、噪音、混音处理等方面都不是十分理想。有的教师借助Windows自带的录音机，只能进行Wave格式的简单的音频编辑，还受60秒的录音时间限制，声音效果也不是很好。专业的CoolEdit、SoundForge等音频处理软件，对音频的处理效果非常好，但操作复杂，缺乏相关音频知识的普通教师掌握起来比较困难。笔者利用NeroWaveEditor对声音进行加工、美化和处理，获得了较好的效果。

简介：这研究的目的是在一条微隧道为控制使用冲击波。冲击波被在隧道搏动的激光横梁集中的激光产生。使用脉搏激光产生一个冲击波，非静止的流动在在平行盘子之间的小空间被导致。球形、圆柱的吃惊繁殖与schlieren方法被观察。吃惊马赫数字与时间减少并且来临到统一。是在以前的调查报导了，吃惊速度在一个短远处和时间被稀释。在现在的实验，它没处于在球形、圆柱的吃惊实验之间的吃惊速度被发现显著差别。随后，圆柱的冲击波导致的流动用PIV技术被学习。烟tracer在实验被使用，它的速度在100渭s以内被测量。数字模拟被执行调查在气体和烟粒子之间的动量松驰。一个合适的吃惊开始模型在模拟被介绍。试验性的结果证明一个宽加速和减速地区在冲击波后面存在。另外，在试验性的数据的松驰距离在数字模拟比那长得多。关键词微强风的波浪-激光集中-流动可视化-PIVCLC数字O354