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简介：疲劳失败长是为轮船的一个重要问题并且近海结构。在为预言疲劳生命的众多的方法之中，光谱方法作为最可靠被接受。尽管在光谱分析后面的理论是直接的，因为它仔细与象疲劳的申请那样的批评技术细节有关正在装载，分析本身复杂、费时间(由于货物挥动压力和惯性的力量)，压力的抽取，并且压力RAO的计算。这里，四关键装载technicaldetails应用，排水量边界条件，压力RAO的计算，和疲劳压力的抽取彻底地讨论了。为每个方面，分辨率基于有限元素pre被介绍--并且processing以后软件MSC/PATRAN或FEsolverMSC/NASTRAN。决定有效、有效，它能帮助工程师表现光谱精确地并且更快使分析疲劳。

简介：Inthispaper,maximum-likelihood(ML)anditsrelaxationalgorithm,whichareusedtoidentifythemathematicsmodelofanunderwatervehicle(UV),arcdiscussed.Withthetrialdataofzigzagtests,thehydrodynamicderivativesoftheUVwereestimated,andtherelaxationalgorithmisconfirmedtohavebetterastringencyfromthecontrastbetweenthetwomethods.Thenasimulationenvironmentbasedontheseparametersisestablishedtoverifythevalidityandeffectofthesemeth-ods.Theresultshowsthemodeliscredibleandthemethodsareveryusefulfortheresearchofmaneuverabilityandadaptivecontrolofunderwatervehicles.

简介：Astherearelotsofnon-linearsystemsintherealengineering,itisveryimportanttodomoreresearchesonthemodelingandpredictionofnon-linearsystems.Basedonthemulti-resolutionanalysis(MRA)ofwavelettheory,thispapercombinedthewavelettheorywithneuralnetworkandestablishedaMRAwaveletnetworkwiththescalingfunctionandwaveletfunctionasitsneurons.Fromtheanalysisinthefrequencydomain,theresultsindicatedthatMRAwaveletnetworkwasbetterthanotherwaveletnetworksintheabilityofapproachingtothesignals.AnessentialresearchwascarriedoutonmodelingandpredictionwithMRAwaveletnetworkinthenon-linearsystem.Usingthelengthwiseswaydatareceivedfromtheexperimentofshipmodel,amodelofofflinepredictionwasestablishedandwasappliedtotheshort-timepredictionofshipmotion.Thesimulationresultsindicatedthattheforecastingmodelimprovedthepredictionprecisioneffectively,lengthenedtheforecastingtimeandhadabetterpredictionresultsthanthatofARlinearmodel.TheresearchindicatesthatitisfeasibletousetheMRAwaveletnetworkintheshort-timepredictionofshipmotion.

简介：在一个天线目标进入水以后，伴随的水泡引起的水里的声音的物理变化是相当复杂的。作为结果，传统的信号分析方法不能识别真实物理目标。鉴于这种状况，为分析一个天线目标鈥檚条目引起进水的声音的一个新奇方法被建议。这个方法由使用empitical模式分解分析水泡的震动的模式。试验性的结果证明这个方法罐头高效地移开噪音并且提取宽带脉搏信号和低频率的波动信号，生产入口时间和频率的精确分辨率。这显示出建议方法的改进表演。关键词实验模式分解-精力特征抽取-变动信号分析杨莉在1982出生了。她从设计大学的哈尔滨毕业了并且在2009收到了硕士学位。她现在是在设计大学的哈尔滨的在水下的声学的设计的一个博士候选人。她的主要兴趣集中于声学的信号处理并且在水下目标识别。李斯春在1963出生了。她是在设计大学的哈尔滨的一个教授。她在从在2008设计大学的哈尔滨的在水下的声学的设计收到了博士学位。她的当前的研究兴趣包括在水下声学的信号处理，信号察觉，被动目标特征抽取和目标识别。

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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：Apressurizerisoneofimportantequipmentinapressurizedwaterreactorplant.Itisusedtomaintainthepressureofprimarycoolantwithinallowedrangebecausethesharpchangeofcoolantpressureaffectsthesecurityofreactor,therefor,thestudyofpressurizer'spressurecontrolmethodsisveryimportant.Inthispaper,anadaptivefuzzycontrollerispresentedforpressurecontrolofapressurizerinanuclearpowerplant.Thecontrollercanon-linetunefuzzycontrolrulesandparametersbyself-learningintheactualcontrolprocess,whichpossessesthewayofthinkinglikehumantomakeadecision.Thesimulationresultsforapressurizedwaterreactorplantshowthattheadaptivefuzzycontrollerhasoptimumandintelligentcharacteristics,whichprovethecontrolleriseffective.

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简介：Dataenvelopmentanalysis(DEA)modeliswidelyusedtoevaluatetherelativeefficiencyofproducers.Itisakindofobjectivedecisionmethodwithmultipleindexes.However,thetwobasicmodelsfrequentlyusedatpresent,theC2RmodelandtheC2GS2modelhavelimitationswhenusedalone,resultinginevaluationsthatareoftenunsatisfactory.Inordertosolvethisproblem,amixedDEAmodelisbuiltandisusedtoevaluatethevalidityofthebusinessefficiencyoflistedcompanies.AnexplanationofhowtousethismixedDEAmodelisofferedanditsfeasibilityisverified.

简介：Inthispaper,theprincipleofH∞filteringisdiscussedandH∞filterisconstructed,whichisusedintheinitialalignmentofthestrapdowninertialnavigationsystems(SINS).TheerrormodelofSINSisderived.ByutilizingconstructedH∞filter,thefilteringcalculationtothatsystemhasbeenconducted.Thesimulationresultsofthemisalignmentanglearegivenundertheconditionofunknownnoises.TheresultsshowthattheprocessofalignmentwithH∞filterismuchfasterandwithexcellentrobustness.

简介：这篇论文的目的是为通过一系列试验性的研究和数字计算加热过程的线调查高周波的正式就职热的可行性。结果证明感应的加热的加热温度遇见钢板弯曲，和感应的加热加热的一个钢盘子的变丑的要求当火焰加热，能完成一样的效果。同时，板的动人的感应的加热的有限元素模型被开发，并且剩余种类的比较回答，在这些二种加热之间的横向的收缩证明那大类似被完成了。

简介：TheInternationalMaritimeOrganization(IMO)hasencourageditsmembercountriestointroduceFormalSafetyAssessment(FSA)forshipoperationssincetheendofthelastcentury.FSAcanbeusedthroughcertainformalassessingstepstogenerateeffectiverecommendationsandcautionstocontrolmarinerisksandimprovethesafetyofships.OnthebasisofthebriefintroductionofFSA,thispaperdescribestheideasofapplyingFSAtothepreventionofhumanerrorinshipoperations.ItespeciallydiscussestheinvestigationandanalysisoftheinformationanddatausingnavigationsimulatorsandputsforwardsomesuggestionsfortheintroductionanddevelopmentoftheFSAresearchworkforsafershipoperations.

简介：Thearticleexaminestheworldexperienceofe-learningaswellasdistanceeducationtechnologieswithintheeducationprocessorganizationonhigherandpost-highereducationprograms.Therehavebeenlistedtheresultsofthemostpopulare-leamingplatformsanalysis.Furthermore,therehavebeenlookedthroughthecorelegislativebackgroundofthedevelopmentofthementionedtechnologiesinRussiaandworldwideamongtheuniversities,specializedinseafarerstraining.TherehavebeenalsodrawnupthepointsoftheAdmiralMakarovStateUniversityofMaritimeandInlandShipping(AdmiralMakarovSUMIS)designofthedistanceeducationsystemLMS“FARWATER”incompliancewiththeInternationalConventiononStandardsofTraining,CertificationandWatchkeepingforSeafarers(STCWConvention).Thepracticalapplicationofdistanceeducationsystemtotheadvancedprofessionaltraininghasbeendiscussedinthearticle.

简介：弄平的粒子水动力学(SPH)是一个Lagrangian无网孔的粒子方法。然而，它内核近似的低精确性当粒子是分布式的时在边界附近混乱或定位是以它的宽应用程序的方法站的一个障碍。采用泰勒系列扩大方法并且解决不可分的方程矩阵，第二个顺序核近似方法能被获得，也就是K2_SPH，它在这份报纸被讨论。这个方法类似于有限粒子方法。与核近似的改进，一些数字技术应该为边界的不同类型被采用，例如一条免费表面边界和稳固的边界，它是为水波浪模拟的K2_SPH的二种关键数字技术。这份报纸给一些涉及由使用K2_SPH承受波浪和sloshing坦克问题的二维的水波浪模拟的数字结果。从模拟结果的比较，K2_SPH方法比标准SPH更可靠。

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简介：在容器使用man-machine-environment系统工程(MMESE)是一个方法为推进一个容器和它的分系统的操作效率，性能，安全，和可居住的目的改进在设备，环境，和人之间的相互作用的有效性。在下列研究，容器的生命周期被划分成9个阶段，并且15研究题目也从这些阶段之中被识别。15个题目是systemized，然后man-machine-environment工程系统应用程序模型因为容器用ICAM定义方法被开发0(IDEF0)，它是一个系统的建模方法。这个系统模型与包括的主要基本研究方法和途径衔接在数据和二个联系题目的信息流动之间的差距，它带先前，相对，独立人士总体上一起使遭到。这个系统的模型的应用程序应该在容器便于man-machine-environment系统工程的应用程序，在特别概念并且化身设计阶段。当减少重复工作时，经理和设计者能快速并且高效地处理详细任务。

简介：Thispaperdescribespathre-planningtechniquesandunderwaterobstacleavoidanceforunmannedsurfacevehicle（USV）basedonmulti-beamforwardlookingsonar（FLS）.Near-optimalpathsinstaticanddynamicenvironmentswithunderwaterobstaclesarecomputedusinganumericalsolutionprocedurebasedonanAalgorithm.TheUSVismodeledwithacircularshapein2degreesoffreedom（surgeandyaw）.Inthispaper,two-dimensional（2-D）underwaterobstacleavoidanceandtherobustreal-timepathre-planningtechniqueforactualUSVusingmulti-beamFLSaredeveloped.Ourreal-timepathre-planningalgorithmhasbeentestedtoregeneratetheoptimalpathforseveralupdatedframesinthefieldofviewofthesonarwithaproperupdatefrequencyoftheFLS.Theperformanceoftheproposedmethodwasverifiedthroughsimulations,andseaexperiments.Forsimulations,theUSVmodelcanavoidbothasinglestationaryobstacle,multiplestationaryobstaclesandmovingobstacleswiththenear-optimaltrajectorythatareperformedbothinthevehicleandtheworldreferenceframe.Forseaexperiments,theproposedmethodforanunderwaterobstacleavoidancesystemisimplementedwithaUSVtestplatform.TheactualUSVisautomaticallycontrolledandsucceededinitsreal-timeavoidanceagainstthestationaryunderseaobstacleinthefieldofviewoftheFLStogetherwiththeGlobalPositioningSystem（GPS）oftheUSV.

简介：在这研究，为海洋的申请目的，我们评估了在微观结构，机械加强和经由电极淀积生产的Zn-TiO2-WO3nanocomposite的腐蚀抵抗性质上装载的过程参数和粒子的效果。我们与与一个精力散分光计(版本)装备的一台扫描电子显微镜(SEM)描绘了合成涂层的词法性质。我们用一个Dura扫描坚硬测试者和一件必然发生的事情执行了机械检查UMT-2多功能的tribological测试者。我们在3.5%NaCl由线性极化评估了腐蚀性质。结果证明涂层展出了好稳定性，极大地装载的量的粒子提高了结构、词法的性质，坚硬行为和涂层的腐蚀抵抗。我们观察到钢上的这合金的降水被合成特征极大地影响。