学科分类
/ 1
17 个结果
  • 简介:Thephaseandfrequencylockingofmicrowave,millimeterwavepowercombiningwereanalysedandsummarizedinanall-roundway.Themaster/slavephaselockingofcavityoscillators,thepeerphaselockingofmutuallycoupledoscillators,andthepeerphaselockingofring-connectedmultipleoscillatorswereinvestigated.Theresultsofnumericalcalculations,andtherelationsofphasetophaselockingmodelandoscillatorparametersweregiven.Andthecavityandspacepowercombiningaspectsformicrowaveandmillimeterwavewerepresented.

  • 标签: Power combining PHASE LOCKING Frequency LOCKING
  • 简介:由于mediopatellar襞的眼泪胀大和前面的痛苦的膝的一个案例被报导。锁住的patellofemoral关节和膝的耐心的也感到的笨蛋。在arthroscopic检查下面,厚、含纤维的襞被发现中间到膝盖骨,并且沿着到infrapatellar脂肪的从中间的膝盖骨的支持带的襞的桶眼泪垫。极化的显微镜的检查显示出骨胶原纤维碎片和轻思考性质的损失。Neuroimmunohistology在裂缝附近在区域建议了synovial襞神经分布的起来规定。这可能与疼痛有关。mediopatellarplicacaused疼痛的桶眼泪和膝的锁比以前报导是更普通的。

  • 标签: 膝关节 撕裂 疼痛 锁定 显微镜检查 胶原纤维
  • 简介:AbstractPurpose:To compare the stability of the posterior anatomic self-locking plate (PASP) with two types of popular reconstruction plate fixation, i.e. double reconstruction plate (DRP) and cross reconstruction plate (CRP), and to explore the influence of sitting and turning right/left on implants.Methods:PASP, DRP and CRP were assembled on a finite element model of both-column fractures of the left acetabulum. A load of 600 N and a torque of 8 N·m were loaded on the S1 vertebral body to detect the change of stress and displacement when sitting and turning right/left.Results:The peak stress and displacement of the three kinds of fixation methods under all loading conditions were CRP > DRP > PASP. The peak stress and displacement of PASP are 313.5 MPa and 1.15 mm respectively when turning right; and the minimal was 234.0 Mpa and 0.619 mm when turning left.Conclusion:PASP can provide higher stability than DRP and CRP for both-column acetabular fractures. The rational movement after posterior DRP and PASP fixation for acetabular fracture is to turn to the ipsilateral side, which can avoid implant failure.

  • 标签: Acetabular fractures Internal fixation Posterior anatomic self-locking plate (PASP) Biomechanics Stability
  • 简介:这篇论文处理一新非与纯排水量边界状况为平面弹性问题遵守各向异性的矩形的有限元素近似。由这个元素的特殊性质的使用,;由介绍互补空间;一系列新奇技术,精力标准的最佳的错误估计;L[2]标准被获得。整齐假设的限制;在常规有限元素方法分析要求的网孔上的伪制服假设或反的假设将被舍弃;非一致的适用的范围有限元素被扩大。

  • 标签: 各向异性 应用数学 同步方式 非一致性
  • 简介:AbstractPre-contoured anatomical locking plates were designed to address the clinical need of fixing small epiphyseal segments with a larger number of screws. Those plates match the contour and shape of a variety of bones allowing for optimal buttress properties. The aim of this manuscript is to highlight the benefits of applying proximal humerus locking plates in the fixation of lower extremity bones. Although designed for the proximal humerus, the low-profile plate shape and anatomic contour also provides versatile use in certain areas of the lower extremity. This technical narrative highlights the versatile and reliable use of this plate for other anatomical areas than the one to which it has been originally conceived.

  • 标签: Proximal humerus Locking plate Distal femur Proximal tibia Distal tibia
  • 简介:这份报纸的主要目的是学习nonconforming线性的三角形的Crouzeix-Raviart类型有各向异性的一般三角形的网孔上的纯排水量边界价值的平面线性弹性问题的有限元素近似令人满意最大的角度条件和坐标系统条件。精力标准和L2标准的最佳的顺序错误估计被获得,哪个独立于打敢愠搠癥吗?

  • 标签: 力学问题 各向异性 三角形 有限元法 线性 弹性
  • 简介:Thepapersummarizestherecentachievementsintheareaofultrafastfiberlasersmode-lockedwithso-calledlowdimensionalnanomaterials:graphene,topologicalinsulators(Bi2Te3,Bi2Se3,Sb2Te3),andtransitionmetalsulfidesemiconductors,likemolybdenumdisulfide(MoS2).Themostimportantexperimentalachievementsaredescribedandcompared.Additionally,neworiginalresultsonultrashortpulsegenerationat1.94μmwavelengthusinggraphenearepresented.ThedesignedTm-dopedfiberlaserutilizesmultilayergrapheneasasaturableabsorberandgenerates654fspulsesat1940nmwavelength,whicharecurrentlytheshortestpulsesgeneratedfromaTm-dopedfiberlaserwithagraphene-basedsaturableabsorber.

  • 标签:
  • 简介:Graphicprocessingunits(GPUs)havebeenwidelyrecognizedascost-efficientco-processorswithacceptablesize,weight,andpowerconsumption.However,adoptingGPUsinreal-timesystemsisstillchallenging,duetothelackinframeworkforreal-timeanalysis.Inordertoguaranteereal-timerequirementswhilemaintainingsystemutilizationinmodernheterogeneoussystems,suchasmulticoremulti-GPUsystems,anovelsuspension-basedk-exclusionreal-timelockingprotocolandtheassociatedsuspension-awareschedulabilityanalysisareproposed.TheproposedprotocolprovidesasynchronizationframeworkthatenablesmultipleGPUstobeefficientlyintegratedinmulticorereal-timesystems.Comparativeevaluationsshowthattheproposedmethodsimproveupontheexistingworkintermsofschedulability.

  • 标签: 实时系统 U系统 多核 协议 锁定 分区
  • 简介:Wepresentanultrabroadband,high-speedwavelength-sweptsourcebasedonaself-modulatedfemtosecondoscillator.Photoniccrystalfiberwaspumpedbyamode-lockedYb:CaF2laser,resultinginastrongspectralbroadeningfrom485to1800nm.Thepumplasercavitycouldberealignedinordertoachievetotalmode-lockingofthelongitudinalandtransverseTEM00andTEM01electromagneticmodes.Thisledtospatialoscillationsoftheoutputbeam,whichinducedmodulationofthecouplingefficiencytothefiber.Duetothefactthatnonlinearspectralbroadeningwasintensitydependent,thismechanismintroducedwavelengthsweepingatthefiberoutput.Thesweepingratecouldbeadjustedbetween7and21.5MHzbychangingthegeometryofthepumpcavity.Bycontrollingtheratioofthetransversemodeamplitudes,wewereabletotunethesweepingbandwidth,eventuallycoveringboththe1300nmand1700nmbioimagingtransparencywindows.Whencomparedwithpreviouslydemonstratedwavelength-sweptsources,ourconceptoffersmuchbroadertunabilityandhigherspeed.Moreover,itdoesnotrequireanadditionalintensitymodulator.

  • 标签: Ultrabroadband wavelength-swept SOURCE
  • 简介:骨头接枝可以被需要用metaphyseal在老病人填满骨头缺点弄碎的远侧的半径骨折。在这回顾,nonrandomized,单个外科医生的学习,我们评估了与使矿物化的骨胶原(MC)使用两块背面的锁住板与或没有扩大的临床、放射线学的结果为老病人与的骨头接枝背面地,metaphyseal弄碎半径破裂。在组1的病人(n=12)在组2用MC骨头接枝申请与背面的锁住的盘子被对待进metaphyseal骨头缺点,和那些(n=12)仅仅与背面的锁住的盘子。临床、放射线学的参数在外科以后在三和12个月被决定。在最后的后续,没有重要差别在2个组之间被注意以手掌倾斜并且光线的倾斜(p=0.80);然而,尺骨的变化在没有扩大,2与背面的锁住的盘子对待的组显著地增加了(p<0.05)。机能上地,这些组之间没有重要差别。我们的初步的学习建议骨头接枝代用品和背面的锁住盘子可以是的MC的那联合一为有metaphyseal的老病人有用地其他弄碎的远侧的半径骨折。

  • 标签: 粉碎性骨折 骨移植 替代物 板带 桡骨 老年
  • 简介:Anall-fiberacousto-opticmodulator(AOM),whichfeaturesacompactstructureandalow-drivingvoltage,isexperimentallydemonstratedfortheactivemode-lockingofafiberlaser.TheproposedAOMisbasedontheshortlengthofthecladding-etchedfiber,theendsofwhicharefixedonaslideglass.Ontopofthecladding-etchedfiber,apiezoelectrictransducerwasoverlaid.Achemicalwet-etchingtechnique,whichisbasedonamixedsolutionofNH4Fand(NH4)2SO4,isusedtoreducethefiberdiameterdownto~25μm,andthelengthoftheetchedsectionisonly0.5cm.Thefabricateddeviceexhibitedamodulationdepthof73.10%atanacousticfrequencyof918.9kHzandapeak-to-peakelectricalvoltageof10V,whilealaserbeamwascoupledat1560nm.ByusingthepreparedAOMwithinanerbium-doped-fiberringcavity,themode-lockedpulseswithatemporalwidthof2.66pswerereadilyobtainedatarepetitionrateof1.838MHz.

  • 标签:
  • 简介:客观:为胫骨的intramedullarynails.Methods的远侧的锁住评估帮助thecomputer的汽车框架航行系统的临床的可行性和效果:系统的硬件部件与一个监视器包括了一台PC计算机,汽车机械立体声战术的定位立方的框架,脚持有者和起作用的本地化仪器。特殊航行软件能被用于X光检查fluoroscopic图象和工具的real-timecontrolling航行的登记。近胫骨、腓骨的破裂的21个案例被对待,关上的intramedullary钉其6在中间第三包含了,12在里面中间、更低第三,3在里面降低第三。涉及锁住的过程的C手臂排列和登记时间,fluoroscopic时间和钻的时间被记录。unreamed或铰大的胫骨的钉子的尺寸从8/300-11/330。结果:除了1的所有远侧的洞成功地被锁。在41个锁的洞(21.95%)中的9个里,练习小点摸了没有钉子和临床的后果的损坏,锁洞的运河。荧光检查时间每一些螺丝钉是2.23s±0.31s。结论:为远侧的锁住的帮助计算机的汽车框架航行系统很好被设计,对容易操作并且不在过程期间需要另外的仪器。发达系统使医生能精确用就一些校准计算机的X光线照相术的图象在整个解剖遨游外科的仪器。X光暴露的全部的时间能显著地每过程被减少。

  • 标签: 框架 导航系统 胫骨 髓内针 临床应用
  • 简介:WithMoS2assaturableabsorber,passiveQ-switchingandQ-switchedmode-lockingoperationsofaTm-dopedcalciumlithiumniobiumgalliumgarnet(Tm:CLNGG)laserwereexperimentallydemonstrated.TheQ-switchedlaseremittedamaximumaverageoutputpowerof62mWandhighestpulseenergyof0.72μJ.Q-switchedmodelockingwasalsoobtainedintheexperiment.TheresearchresultswillopenupapplicationsofMoS2atthemid-infraredwavelength.

  • 标签:
  • 简介:Ultrashortpulsesweregeneratedinpassivelymode-lockedNd:YAGandNd:GdVO4laserspumpedbyapulsedlaserdiodewith10-Hzrepetitionrate.Stablemode-lockedpulsetrainswereproducedwiththepulsewidthof10ps.Theevolutionofthemode-lockedpulsewasobservedintheexperimentandwasdiscussedindetail.ComparingthepulseevolutionsofNd:YAGandNd:GdVO4lasers,wefoundthatthebuilduptimeofthesteady-statemode-lockingwithsemiconductorsaturableabsorbermirrors(SESAMs)wasrelevanttotheupper-statelifetimeandtheemissioncross-sectionofthegainmedium.

  • 标签: 比较学习 模式锁定动力学 二极管 皮秒 ND:GDVO4激光器 Nd:YAG激光器