学科分类
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128 个结果
  • 简介:Flexiblesupercapacitorsshowagreatpotentialforapplicationsinwearable,miniaturized,portable,largescaletransparentandflexibleconsumerelectronicsduetotheirsignificant,inherentadvantages,suchasbeingflexible,lightweight,lowcostandenvironmentallyfriendlyincomparisonwiththecurrentenergystoragedevices.Inthisreport,recentprogressonflexiblesupercapacitors,flexibleelectrodesandelectrolytesisreviewed.Inaddition,thefuturechallengesandopportunitiesarediscussed.

  • 标签: 超级电容器 消费类电子产品 柔性电极 小型化 便携式 重量轻
  • 简介:Flexiblebronchoscopyisanessentialbasicinvestigationinrespiratorymedicine.Itenablesvisualinspectionoftheairwaysdowntothesubsegments,andallowsvarioussamplestobeeasilyobtainde.Theprocedureisverysafeandisperformedasaday-caseprocedurewithlocalanaestheria,withorwithoutshort-actingintravenoussedation.

  • 标签: 支气管镜 呼吸系统 检查方法 使用方法
  • 简介:一个灵活起床人的机械表演是比处于强烈环境条件的另外的起床人更突出的。基于lumped团方法,灵活起床人配置纳入了漂浮的生产存储的一个陡峭的波浪并且(FPSO)卸载被用于全球分析以便获得灵活起床人的静态、动态的行为。起床人在每结束与一个节点被划分成一系列笔直地无团的线片断。当团,重量,和快活都是到节点的lumped时,仅仅线的轴、扭力的性质被建模。四不同快活模块长度被做了表明模式选择的重要性,以便证实最佳快活模块长度。在灵活起床人不对海洋水流很敏感的敏感学习表演的结果,和快活模块能减少Von协定压力并且改进灵活起床人的机械表演。更短的快活模块长度能减少起床人在快活模块长度的一个特定的范围的有效紧张当另外的参数是时,常数,而是它能也增加起床人的最大的弯曲。作为结果,各种起床人表演应该被考虑以便选择最适当的快活模块长度。

  • 标签: 立管 集中质量法 Mises应力 柔性 机械性能 转接卡
  • 简介:Theunbondedflexiblepipeofeightlayers,inwhichallthelayersexceptthecarcasslayerareassumedtohaveisotropicproperties,hasbeenanalyzed.Specifically,thecarcasslayershowstheorthotropiccharacteristics.Theeffectiveelasticmoduliofthecarcasslayerhavebeendevelopedintermsoftheinfluenceofdeformationtostiffness.Withconsiderationoftheeffectiveelasticmoduli,thestructurecanbeproperlyanalyzed.Alsotherelativemovementsoftendonsandrelativedisplacementsofwiresinhelicalarmourlayerhavebeeninvestigated.Athree-dimensionalnonlinearfiniteelementmodelhasbeenpresentedtopredicttheresponseofflexiblepipesunderaxialforceandtorque.Further,thefrictionandcontactofinterlayerhavebeenconsidered.Comparisonbetweenthefiniteelementmodelandexperimentalresultsobtainedinliteraturehasbeengivenanddiscussed,whichmightprovidepracticalandtechnicalsupportfortheapplicationofunbondedflexiblepipes.

  • 标签: 数值模拟 软管 有效弹性模量 有限元模型 三维非线性 各向同性
  • 简介:Duringhissecondtenure,Clintonwillpaymoreattentiontodiplomaticworkandmaymakesomeadjustmentsinhisforeignpolicywhilemaintainingcontinuityofthepolicyduringhisfirsttenure.1.Theguidelineofforeignpolicyofthenewadministrationwouldbecharac-terizedbythefollowingthreefeatures:

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  • 简介:Intheviewofstaffshortagesandthehugeinventoryofproductsinthecurrentmarket,weputforwardapersonnelschedulingmodelinthetargetofclosingtothedeliverydateconsideringtheparallelism.Thenwedesignedaschedulingalgorithmbasedongeneticalgorithmandproposedaflexibleparalleldecodingmethodwhichtakefulluseofthepersonalcapacity.Casestudyresultsindicatethattheflexiblepersonnelschedulingconsideringtheorder-shopscheduling,machineautomaticcapabilitiesandpersonnelflexibleinthetargetofclosingtothedeliverydateoptimizetheallocationofhumanresources,thenmaximizetheefficiency.

  • 标签: 并行环境 调度模型 人事 解码方法 遗传算法 调度算法
  • 简介:Thestructuralpropertiesofwateratdifferenttemperatureshavebeeninestigatedusingaflexiblewatermodelintheisothermal-isobaricensemble.Withdecreasingtemperature,thetetrahedralityofthedistributionofthewatermoleculesaroundthecentralwatermoleculeisenhanced,andthehydrogenbondsbecomemorelinear.Bymeansofaconjugategradientenergyminimization,dynamicalconfigurationsatvarioustemperatureshavebeenmappedontonearbypotential-energyminima,the50°-60°peak(P1)inthedistributionfunctionoftheO-O-Oangleofatrimerbecomesfarsmaller.HoweverthereappearstobeasmallbutobservabletemperaturedependenceofP1,i.e.thehigherthetemperature,thehighertheP1intensity.

  • 标签: 结构特性 可塑性水模型
  • 简介:宿命论对在调试的多线程的节目很有用,测试,等等。许多确定的途径被建议了,例如确定的多线程(DMT)并且确定重放。然而,这些系统任何一个是低效的或指向一个单�

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  • 简介:Page-basedsoftwareDSMsystemssufferfromfalsesharingcausedbythelargesharinggranularity,andonlysupportone-dimensionBlockorCyclicblockdatadistributionschemes,Thusapplicationsrunningonthemwillsufferfrompoordatalocalityandwillbeabletoexploitparallelismonlywhenusingalargenumberofprocessors,Inthispaper.awaytowardssupportingflexibledatadistribution(FDD)onsoftwareDSMsystemispresented.Smallgranularity-tunableblocks,thesizeofwhichcanbesetbycompilerorprogrammer,areusedtooverlaptheworkingdatasetsdistributedamongprocessors.TheFDDwasimplmentedonasoftwareDSMsystemcalledJIAJIA.ComparedwithBlock/Cyclic-blockdistributionschemesusedbymostDSMsystemsnow,experimentsshowthattheproposedwayofflexibledatadistributionismoreeffective.Theperformanceoftheapplicationsusedintheexperimentsissignificantlyimproved.

  • 标签: 软件开发 DSMS 数据分布
  • 简介:Wecomputethewakeofatwo-dimensionalandthree-dimensionalflexiblefininanunsteadyflowfieldwithheavingandpitchingmotionsusingFLUENT.Deflexionmodeisusedforanon-uniformcantileverbeamwithnon-uniformlydistributedload.Theeffectofchordwisedeflexionlengthonthecharacteristicsofpropulsionisdiscussedfortwo-dimensionalflexiblefin.Thethrustcoefficientdecreases,propulsiveefficiencyincreasesandtheintensityofturbulenceattenuatesgraduallyasthedeflexionlengthincreases.Forathree-dimensionalflexiblefin,theintensityofthevortexintheplaneofsymmetryishigherthanthatintheplaneat3/4spanlengthofthecaudalfin.Butthepropulsiveperformanceachievedisnotwhatweexpectedwiththegivendeflexionmode.

  • 标签: 湍流强度 偏转长度 摆动系数 仿生学
  • 简介:Anonlineardynamicanalysismodelisestabilishedonthebasisof"lumpedmass"approach,whichtakestheinfluenceofthefluidflowwithinthepipeintoconsideration.Numericalresultsarecomparedwiththepublishedworks,andtheeffectsofinternalfluidflow,internalpressure,dyanmicsaswellasthenonlinearcharacteristicsonthebehaviorofflexiblerisersarediscussed.Fromthiswork,someusefulconclusionsaredrawn.

  • 标签: FLEXIBLE RISER nonlinear dynamic analysis model
  • 简介:Thepotentialforharvestingenergyfromaflexibledeltawingusingapiezoelectricbimorphisexperimentallyinvestigated.Differentconfigurationsoftheproposedharvestingsystemweretestedinawindtunneloverabroadrangeofairspeeds.Inadditiontoevaluatingthelevelofharvestedpower,ananalysisisperformedtoextractcriticalaspectsfortherelationbetweenspeed,flexibility,geometryandthepotentialpowerthatcanbeharvestedfromaclamped,cantileveredflexibledeltawingatlowanglesofattackandlowspeeds.Thisanalysisprovidesaninsightintoparametersthatimpactenergyharvestingfromflexiblemembranesorelements.

  • 标签: Energy HARVESTING DELTA WING PIEZOELECTRIC BENDING
  • 简介:ThetransientresponsetolongitudinalimpactofflexiblerodswithHertzcontactiscloselyrelatedtotheextentofdeformationswithdifferentimpactparameters.BymeansofLS-DYNA,fordifferentradiusanddifferentspeeds,thelongitudinalimpactofahammerwitharoundedendonadrillrodisnumericallysimulatedinthisarticle.Simulationsdemonstratethatthereisanobviousdif-ferencebetweenanalyticalsolutionandnumericalsolutiononconditionofshortcurvatureradius.Inthecircumstancecontactpressureincreases,theboundaryoftheyieldzoneexceedsthatofthecontactzone,andthesignificantplasticdeformationreducestheintensityofcontactpressurepulse.Contactforce-timecurvesinloadingandunloadingphasesshiftdown.Thenumericalsolutionisingoodagree-mentwithanalyticalsolutiononconditionoflargecurvatureradiusandimpactspeeds.Thedeforma-tionofyieldregionisconstrainedbythesurroundingelasticregionandnosignificantplasticdeforma-tionappears.

  • 标签: 数值模拟 瞬态响应 柔性体 HERTZ接触 LS-DYNA 赫兹