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简介：Totesttheaccuracyofanewfingerprintscanner,researcherstypicallyrunmillionsofknownfingerprintimagesthroughthesystem'smatchingsoftware.Butthistestingprocedurecan'tquitemimicrealoperatingconditions,asa2-Dimagefedintoaprogramisfundamentallydifferentthana3-Dfingerpressedtoasensor.

简介：Theboundaryelementmethodforthemodalanalysisoffreevibrationfor3-Danisotropicstructuresusingparticularsolutionshasbeendeveloped.Thecompletepolynomialsofordertwoareusedtoconstructtheparticularsolutionsforgeneralanisotropicmaterials.Thenumericalresultsfor3-Dfreevibra-tionanalysisofanisotropiecantileverbeambythemethodpresentedisingoodagreementwiththeresultsus-ingtheRitztechnique.Foranisotropicmaterials,thenumericalresultscalculatedfromtheproposedmethodareingoodagreementwiththeresultsfromMSC.NASTRAN.

简介：Inthispaper,perturbationmethodandFourier-cosine-expansionmethodareusedtosolvea3-DnonlinearproblemofasupercavitatingflowinaninclinedfieldofgravityatlargeFroudenumbers.Byexpandingthevelocitypotentialintoapowerseriesofasmallparameter,theoriginal3-Dnonlinearproblemisreducedtoanumberof2-Dones.Thesolutionsofthefirstthreeordersarederivedindetailandexpressedintermsofthecompleteellipticintegralsofthefirstandsecondkinds.Thentheboundaryintegralequationmethodisappliedtogetthenumericalsolutionsforeachorder.Computationalresultsareprovidedforsupercavitatingflowspastconesundervariousflowconditions.

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简介：近日，英国牛津大学化学系HaganBayley教授及其团队在《科学》杂志上发表报告，

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简介：对许多人来说,3-D电影也许并不是一个新奇的概念,就是那种需要戴着特制的眼镜观看的立体电影。它是一种利用人类视觉的"偏光原理"在银幕上营造出三维立体的视觉效果的电影形式,在上世纪50年代被发明出来之后昙花一现,并没有广泛地流行和推广。然而今天,这种尘封已久的技术正被好莱坞的电影巨头视为拯救电影产业的致命法宝而加以开发。从加大3-D电影的制作力度,到加快影院放映的数字改造,好莱坞电影产业正跑步进入一个3-D电影的时代。

简介：基于自然边界减小检验一个nonoverlapping领域分解方法。D-N的开发轮流出现的算法；为外面的球形的领域学习D-N方法的集中；D-N的分离形式的讨论轮流出现的算法。

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简介：由露头，日志和核心数据识别古老的河的词法类型是容易的。然而，隧道的水平分发和几何学能被依靠3-D仅仅鉴别并且预言地震数据。特别，地震地平线切的3-D能在蜿蜒地流的河，支流隧道和低蜿蜒的隧道的沙岩预言起一个重要作用。每个微外形单位包括主要隧道，例如蜿蜒或分叉的隧道，早朝，裂缝隧道，叶舌裂缝展开，泛滥平原等等能被识别。编织隧道沙岩是平面平坦侧面连接沙身体和厚主要隧道带的分发能仅仅从3-D被识别地震数据。因为编织沙岩是无所不在的，他们的出现和分发不需要被预言。通常，煤速度是那么低的它能在煤阶层创造强壮的振幅思考。它因而隐藏振幅作答到吻合能从3-D被识别的隧道沙岩地震倒置数据有时。充满泥的低蜿蜒的河的案例研究与3-D识别了地震数据显示如此的沙身体的规模和width-to-thickness比率是小的，旁边地不连接，并且通常在干燥气候条件下面发生在一把冲积扇子的远或进一步的部分上。有时，沿着地平线的每个思考事件的地震属性的抽取被期望最大化古老的隧道的空间进化的表示。

简介：Inthepresenceofbottomwater,adropinthereservoirpressureduetofluidproductioncausestheaquiferwatertoexpandandtoflowintothereservoir.Therefore,hydrocarbonproductionfromawellislimitedbythecriticalflowrate.Themainpurposeofthisstudyistoinvestigatethebreakthroughtimeandthecriticalratebyusinganovel3-Dhorizontalwellmodel.Basedonthehypothesisthatthehorizontalwellislocatedinanypositionofacircularreservoirwithno-flowboundaryonthetopofthereservoirandconstantpressureboundaryatthebottom,thehorizontalwellhasbeenregardedasaninfiniteconductivitylinesinkandthena3-Dsteady-stateflowmodelofthehorizontalwellissetup.ApointsinkpressuresolutioncanbeobtainedwiththeFouriertransform.Theresultofthepressuredistributionoftheuniformfluxhorizontalwellcanbepresentedbymeansoftheprincipleofsuperposition.Accordingtothestablewatercrestingtheory,thisstudyconfirmsthestableheightofwatercrestingandthecriticalrate.Meanwhile,itcanre-confirmthebreakthroughtimeataspecificrate.Theoutputofacomparisonbetweenthis3-Dmodelandthereservoirnumericalsimulator(Eclipse)showsthemethodpresentedherecanbeappliedtoinvestigatethebehaviorofawatercrestingandtopredictthebreakthroughtimeatthebottomwaterdriverreservoir.

简介：A3-DnonlinearproblemofsupercavitatingflowpastanaxisymmetricbodyatasmallangleofattackisinvestigatedbymeansoftheperturbationmethodandFourier-cosine-expansionmethod.Thefirstthreeorderperturbationequationsarederivedindetailandsolvednumericallyusingtheboundaryintegralequationmethodanditerativetechniques.Computationalresultsofthehydrodynamiccharacteristicsandcavityshapesofeachorderarepresentedfornonaxisymmetricsupercavitatingflowpastconeswithvariousapex-anglesatdiffer-entcavitationnumbers.Thenumericalresultsarefoundingoodagreementwithexperimentaldata.

简介：Byusingthecenterprojectionimagesequencetoestimate3-Dmotionparameters,oneneedstoknowthecorrespondingrelationshipbetweenthefeatureofmotionobjectinspaceandtheprojectioncoordinateonimageplane.Inordertoavoidusingtherelationshipoffeaturecorrespondence,thetensoranalysismethodintheaffinetransformationsystemispresented,andthesimulationdataofexperimentalresultsaregiven.

简介：Inthisarticle,theanaglyphvideomakerisemployedforgeneratingrealistic3-DflowsandthesoftwareFlowAnimatorisdevelopedusingthattechnology.BasedonMicrosoftWindowsPresentationFoundation(WPF),thereal3-Dsceneissetupandmarkerparticlesaredistributedinitrandomlyinordertocreateamorenaturalflowscenario.ThetrajectoryoftheparticlemotioniscalculatedwithLagrangiandescriptionin3-Dspace.Duringthesimulation,theviewportcanbechangedinordertofocusondifferentpartsofthemodelbypanning,zooming,rotatingandinclinationvariationetc.Markerparticlesmayappearindifferentshapes:spheres,tracking-balls,cylindersandribbonsinordertofitdifferentflows.Itisthefirsttimethatthevideoanaglyphtechnologyisemployedinthe3-Dhydrodynamicsimulation,whichremovestheobstaclesfor3-Dscenestoberenderedonaflat-paneldisplay.

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：A3-D数字核心描述岩石的毛孔空间微观结构。X光检查微CT扫描是最精确、直接却昂贵的方法获得3-D数字核心。在这研究，我们建议联合沉积模拟的一个混合方法并且退火模仿(SA)产生3-D的方法数字核心基于岩石的2-D图象。有沉积模拟的方法开始造3-D数字核心，它是为SA方法的起始的配置。我们用SA方法更新起始的数字核心匹配2-D岩石图象的自相关功能并且最后造最后的3-D数字核心。与典型SA方法相比，混合方法显著地减少了计算时间。本地孔理论被用于份量上比较重建的3-D有X光检查微CT3-D图象的数字核心。结果显示3-D数字核心由混合方法重建了有同质和X光检查微CT图象的类似于那些的几何连接。形成因素和重建的3-D的渗透数字核心用有限元素方法被估计(女性)并且格子Boltzmann方法(LBM)分别地。模仿的结果在对试验性的大小的好同意。模拟结果的比较建议数字核心由更多仔细独自比典型SA方法反映真运输性质的混合方法重建了。

简介：摘要: 本文根据四轴联动、加热和冷却的需要，对3-D打印设备控制硬件进行了开发设计，确定了控制系统的组成，并设计了基于Tmega2560-16AU单片机的3—打印系统硬件连线图。

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