简介：Underwatervehicleplaysanimportantroleinoceanengineering.Depthcontrolbyfinisoneofthedifficultiesforunderwatervehicleinmotioncontrol.Depthcontrolisindirectduetothefreedomcouplingbetweentrimandaxialmotion.Itincludesthemethodofdynamicanalysisandlift-resistance-coefficientexperimentandtheoryalgorithm.Byconsideringthecurrentspeedanddepthdeviation,comprehensiveinterpretationisusedinobject-planninginstruction.Expecteddepthistransformedintoexpectedtrim.Dynamicoutputfluctuationcanbeavoided,whichiscausedbylinearmappingofdeviation.Itissteadyandaccurateforthemotionofcontrolledunderwatervehicles.Thefeasibilityandefficiencyofthecontrolmethodaretestifiedinthepoolandnaturalareaforexperiments.

简介：与流畅的软件包裹一起，平均Reynolds的海军司烧(RANS)方法被用来与另外的戳鳍学习推进器和rudders的稳定、不稳定的相互作用。滑动网孔模特儿被雇用模仿在片，rudder和戳鳍之间的不稳定的相互作用。基于数字结果，推进器上的压力分发和鳍的效率作为攻击角度的功能被计算。RANS结果与潜在的方法计算的结果相比。潜在的方法和RANS方法的结果有好一致性，这被发现，但是他们为鳍，和这样相应的攻击角度产出最大的效率，那不是相同的。

简介：Inthispaper,wepresentathreedimensionalnumericalinvestigationofheattransferinaparabolictroughcollectorreceiverwithlongitudinalfinsusingdifferentkindsofnanofluid,withanoperationaltemperatureof573Kandnanoparticleconcentrationof1%involume.Theoutersurfaceoftheabsorberreceivesanon-uniformheatflux,whichisobtainedbyusingtheMonteCarloraytracingtechnique.Thenumericalresultsarecontrastedwithempiricalresultsavailableintheopenliterature.AsignificantimprovementofheattransferisderivedwhentheReynoldsnumbervariesintherange2.57×104≤Re≤2.57×105,thetube-sideNusseltnumberincreasesfrom1.3to1.8times,alsothemetallicnanoparticlesimproveheattransfergreatlythanothernanoparticles,combiningbothmechanismsprovidesbetterheattransferandhigherthermo-hydraulicperformance.

简介：Inpresent,thereareincreasinginterestsintheresearchonmechanicalandcontrolsystemofunderwatervehicles.Theseongoingresearcheffortsaremotivatedbymorepervasiveapplicationsofsuchvehiclesincludingseabedoilandgasexplorations,scientificdeepoceansurveys,militarypurposes,ecologicalandwaterenvironmentalstudies,andalsoentertainments.However,theperformanceofunderwatervehicleswithscrewtypepropellersisnotprospectiveintermsofitsefficiencyandmaneuverability.Themainweaknessesofthiskindofpropellersaretheproductionofvorticesandsuddengenerationofthrustforceswhichmakethecontrolofthepositionandmotiondifficult.Ontheotherhand,fishesandotheraquaticanimalsareefficientswimmers,posseshighmaneuverability,areabletofollowtrajectories,canefficientlystabilizethemselvesincurrentsandsurges,createlesswakesthancurrentlyusedunderwatervehicle,andalsohaveanoiselesspropulsion.Thefish’slocomotionmechanismismainlycontrolledbyitscaudalfinandpairedpectoralfins.TheyareclassifiedintoBodyand/orCaudalFin(BCF)andMedianand/orpairedPectoralFins(MPF).Thestudyofhighlyefficientswimmingmechanismsoffishcaninspireabetterunderwatervehiclesthrusterdesignanditsmechanism.Therearefewstudiesonunderwatervehiclesorfishrobotsusingpairedpectoralfinsasthruster.Theworkpresentedinthispaperrepresentsacontributioninthisareacoveringstudy,designandimplementationoflocomotionmechanismsofpairedpectoralfinsinafishrobot.Theperformanceandviabilityofthebiomimeticmethodforunderwatervehiclesarehighlightedthroughin-waterexperimentofaroboticfish.

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简介：鳍和控制的运动出现在水下在液体的车辆是一个有趣、挑战性的研究题目。典型地在如此的身体附近的液体流动上的鳍摆动的效果是高度不稳定的，产生旋涡并且要求液体结构相互作用的详细分析。如此的流动的复杂性的理解在他们的推进开发能够高有活力的性能的车辆并且调遣的工程师感兴趣。在现在的学习，CFD基于搬进来的3-D鳍身体的RANS模拟一粘滞液体被开发。它由评估水动力学系数调查了水动力学性能(电梯，拖并且时刻)在二不同震荡频率。影响鳍身体的水动力学性能的因素的参量的分析被做，与从实验的结果的比较一起。模拟的结果在对试验性的结果的靠近的同意被发现，这为3-D鳍的不稳定的水动力学系数的评估作为一个有效工具验证了模拟。这个工作能是进一步的被用于稳定性的分析和激活的鳍的可操作性在水下车辆。

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简介：  摘要：机器人和PLC结合起来，运用在各种非标自动设备中。PLC和机器人控制器之间的数据有效高效交换，直接决定自动化设备的效率和稳定性。在欧姆龙Fins命令下的网络通讯，实现了欧姆龙PLC和机器人在网络中，实现高效稳定的虚拟IO通讯。

简介：摘要目的观察并分析多囊卵巢综合征不孕患者实施护理干预对其2h-PBG及FINS的影响。方法在本院2014年6月-2016年11月间本院接诊的多囊卵巢综合征不孕病患中随机选取32例进行此次研究的分组对照护理，对照组采取常规护理，观察组则增加实施护理干预，各16例。结果比较两组FBG、2h-PBG、FINS水平，结果提示观察组所得效果均更为理想（P＜0.05）。结论对多囊卵巢综合征不孕患者实施护理干预可有效改善患者的内分泌代谢情况，故值得推广。