简介:Micro-structures3-Dprofilemeasurementisanimportantmeasurementcontentforresearchonmicro-machiningandcharacterizationofmicro-dimension.Inthispaper,anewmethodinvolved2-Dstructuretemplate,whichguidesphaseunwrapping,isproposedbasedonphase-shiftingmicroscopicinterferometry.Itisfitnotonlyforstaticmeasurement,butalsofordynamicmeasurement,especiallyformotionofMEMSdevices.3-Dprofileofactivecombofmicro-resonatorisobtainedbyusingthemethod.Thetheoreticprecisioninout-of-planedirectionisbetterthan0.5nm.Thein-planetheoreticprecisioninmicro-structuresisbetterthan0.5μm.Butattheedgeofmicro-structures,itisonthelevelofmicrometermainlycausedbyimpreciseedgeanalysis.Finally,itsdisadvantagesandthefollowingdevelopmentarediscussed.
简介:为3D发现一个设计方法活跃的多信道的硅微电极,在二根2D探针,二片集成电路和二个分隔符是微的的地方,活跃神经记录系统的微观结构被介绍集合在5公里x上7公里硅站台,并且32个地点神经信号能同时被操作。为由硅测量神经信号的一个理论模型微电极基于结构和single-shankprobe的制造过程被建议。决定探查胫的维的参数的方法在下列三个方面被讨论,我。e。大披肩和endocranium的结构。神经探查的联合interconnectersnoise,和力量特征。设计标准是最小化神经探查的尺寸象一样探查有足够的僵硬穿透endocranium。Theon薄片统一获得通带放大器从60Hz在带宽上有42dB的全面获得到10kHz;并且DC基线稳定性电路具有在30MΩ上面的高输入抵抗在100Hz下面保证截止频率。电路在刺激或记录模式工作。模式的变换取决于刺激控制信号。
简介:1IntroductionMechanicalCADsystemsuse3Dgeometricrepresentationtoformtheglobalproductinformationmodelforsatisfyingthewholelife...
简介:客观:评估实用性二维(2D)andthree维(3D)在LeForttype破裂的鉴定和分类计算了断层摄影术(CT)。方法:有Le堡垒破裂的不同类型的62个病人经历了CTscanning和3D-CT重建。数据被多平面的重建(MPR)分析,表面分别地遮了显示(SSD)和显示的体积(VR)。结果:有LeFortⅠ的病人。Le堡垒Ⅱ破裂和Le堡垒Ⅲ骨折说明了16.1%,14.5%并且12.9%respectively。复合破裂是最普通的类型并且说明了56.5%(n=35,有Le堡垒Ⅰ+Ⅱ骨折,有Le堡垒Ⅱ+Ⅲ骨折的10个盒子和有Le堡垒Ⅰ+Ⅱ+Ⅲ骨折的7个盒子的18cases)。55个盒子在maxillofacialregion.2D-CT与另外的破裂共存了能被用来与3D-CT,而是Le堡垒类型破裂的真实印象相比更精确地定义微小的破裂和深结构的破裂不能正确地在2D-CT上被评估。3D-CT能清楚地表明Le堡垒类型破裂的整个形状并且识别Le堡垒破裂的分类。结论:3D-CT是为Le堡垒类型破裂的诊断的最好的成像方法并且能提供空间关系的珍贵信息,特别为在操作前的处理计划的设计。
简介:Inthispaperweproposeasufficientconditionforminimalroutingin3-dimensional(3-D)mesheswithfaultynodes.Itisbasedonanearlyworkoftheauthoronminimalroutingin2-dimensional(2-D)meshes.Unlikemanytraditionalmodelsthatassumeallthenodesknowglobalfaultdistributionorjustadjacentfaultinformation,ourapproachisbasedontheconceptoflimitedglobalfaultinformation.First,weproposeafaultmodelcalledfaultycubeinwhichallfaultynodesinthesystemarecontainedinasetoffaultycubes.Faultinformationisthendistributedtolimitednumberofnodeswhileitisstillsufficienttosupportminimalrouting.Thelimitedfaultinformationcollectedateachnodeisrepresentedbyavectorcalledextendedsafetylevel.Theextendedsafetylevelassociatedwithanodecanbeusedtodeterminetheexistenceofaminimalpathfromthisnodetoagivendestination.Specifically,westudytheexistenceofminimalpathsatagivensourcenode,limiteddistributionoffaultinformation,minimalrouting,anddeadlock-freeandlivelock-freerouting.Ourresultsshowthatanyminimalroutingthatispartiallyadaptivecanbeappliedinourmodelaslongasthedestinationnodemeetsacertaincondition.Wealsoproposeadynamicplanar-adaptiveroutingschemethatoffersbetterfaulttoleranceandadaptivitythantheplanar-adaptiveroutingschemein3-Dmeshes.Ourapproachisthefirstattempttoaddressadaptiveandminimalroutingin3-Dmesheswithfaultynodesusinglimitedfaultinformation.
简介:TheIsodynetechniquebasedonthescatteredlightscanningfromathinlaserbeamcanbeusedtoobtaintheinformationinsidetheloadedobjectintheroomtemperaturenondestructively,soitisaverypowerfultechniquein3Dstressanalysis.Theproblemsarehowtointerprettheinformationandhowtogetsufficientinformationfromthefewinterferencefringe.Birefringencephaseshifttechniquecandistinguishthefringeordersautomaticallyandenrichtheinformationin256graylevelsbetweenmaximandminimlightintensity.InthepapertheIsodynebirefringencephaseshiftmethodwithanobliqueincidenceandequilibriumequationispresented,bywhichthe3DstressesinthemiddleplaneofaplatewithUshapenotchareseparatedsuccessfully.
简介:SegmentationandedgeregulationarestudieddeeplytoextractbuildingsfromDSMdataproducedinthispaper.Buildingsegmentationisthefirststeptoextractbuildings,andanewsegmentationmethod-adaptiveiterativesegmentationconsideringratiomeansquare-isproposedtoextractthecontourofbuildingseffectively.Asub-image(suchas50×50pixels)oftheimageisprocessedinsequence,theaveragegraylevelanditsratiomeansquarearecalculatedfirst,thenthresholdofthesub-imageisselectedbyusingiterativethresholdsegmentation.Thecurrentpixelissegmentedaccordingtothethreshold,theaver-agegraylevelandtheratiomeansquareofthesub-image.Theedgepointsofthebuildingaregroupedaccordingtotheazimuthofneighborpoints,andthentheoptimalazimuthofthepointsthatbelongtothesamegroupcanbecalculatedbyusinglineinterpolation.
简介:Awhole-field3Dsurfacemeasurementsystemforsemiconductorwaferinspectionisdescribed.Thesystemconsistsofanopticalfiberplate,whichcansplitthelightbeamintoN2subbeamstorealizethewhole-fieldinspection.Aspecialprismisusedtoseparatetheilluminationlightandsignallight.Thissetupischaracterizedbyhighprecision,highspeedandsimplestructure.