简介：Theaimofthispaperistopresentananalyticalexpressionforthestreamwisevelocitydistributioninanon-uniformflowinthepresenceofwaves;thecorrelationbetweenthehorizontalandverticalvelocitycomponentshasbeencomprehensivelyexamined.Differentfrompreviousresearcheswhichattributedthedeviationofvelocityfromtheclassicallog-lawtothewaveReynoldsstress,i.e.-ρ(uv)only,thisstudydemonstratesthatthemomentumfluxcausedbymeanvelocities,i.e.,(u)and(v),isalsoresponsibleforthevelocitydeviation,anditisfoundthatthestreamwisevelocityforaflowinthepresenceofnon-zerowall-normalvelocitydoesnotfollowtheclassicallog-law,butthemodifiedlog-lawproposedinthisstudybasedonsimplifiedmixing-lengththeorem.Thevalidityofthemodifiedlog-lawhasbeenverifiedbyuseofavailableexperimentaldatafrompublishedsourcesforcombinedwave-currentflows,andgoodagreementbetweenthepredictedandobservedvelocityprofileshasbeenachieved.

简介：Groundmotionsaresignificantlyinfluencedbydynamiccharacteristicsofoverburdensoillayersneargroundsurface,asthickandsoftsoillayerswouldobviouslyamplifythegroundmotionstrength.Theconventionalresearchmethodonsoilnonlineardynamiccharacteristicsunderstrongmotionsisbasedonexperimentsinlaboratoriesforthedeficiencyofobservationdata,butitisdifficulttoreliablysimulatethecomplexfactorsofsoilsinactualearthquakedurations,includingloadingpaths,boundaryconditions,anddrainageconditions.Theincrementaldataoftheverticaldownholeobservationarray,whichiscomprisedofatleastoneobservationpointongroundsurfaceandoneobservationpointinadownholerockbase,makesitpossibletostudysoilnonlineardynamicsaccordingtoinsituobservationdata,andprovidesnewbasicdataanddevelopmentopportunitiestosoilnonlineardynamicsstudies.

简介：Videoobjectextractionisakeytechnologyincontent-basedvideocoding.AnovelvideoobjectextractingalgorithmbytwoDimensional(2-D)mesh-basedmotionanalysisisproposedinthispaper.Firstly,a2-Dmeshfittingtheoriginalframeimageisobtainedviafeaturedetectionalgorithm.Then,higherorderstatisticsmotionanalysisisappliedonthe2-Dmeshrepresentationtogetaninitialmotiondetectionmask.Afterpost-processing,thefinalsegmentingmaskisquicklyobtained.Andhencethevideoobjectiseffectivelyextracted.Experimentalresultsshowthattheproposedalgorithmcombinesthemeritsofmesh-basedsegmentingalgorithmsandpixel-basedsegmentingalgorithms,andherebyachievessatisfactorysubjectiveandobjectiveperformancewhiledramaticallyincreasingthesegmentingspeed.

简介：Toresearchtheeffectoftheselectionmethodofmulti-objectsgeneticalgorithmproblemonoptimizingresult,thismethodisanalyzedtheoreticallyanddiscussedbyusinganautonomousunderwatervehicle(AUV)asanobject.Achangingweightvtluemethodisputforwardandaselectionformulaismodified.SomeexperimentswereimplementedonanAUV.TwinBurger.Theresultsshowsthatthismethodiseffectiveandfeasible.

简介：Q：老师您好：我是贵刊的一位新读者，最近正好有问题想问一下：请问奥迪IT四驱版本使用的四驱技术是奥迪的quattro还是大众的MOTION？

简介：Oneofmanyinterestingresearchactivitiesinbiofluidmechanicsisdedicatedtoinvestigationsoflocomotioninwater.Someofpropulsionmechanismsobservedintheunderwaterworldareusedinthedevelopmentprocessofunderwaterauto-nomicvehicles(AUV).Inordertocharacteriseseveralsolutionsaccordingtotheirmanoeuvrability,influenceonthesur-roundingfluidandenergeticefficiency,adetailedanalysisoffin-likemovementisindispensable.Inthecurrentpaperananalysisofundulatory,oscillatoryandcombinedfin-likemovementsbymeansofnumericalsimulationiscarriedout.TheconservationequationofmassandtheconservationequationofmomentumaresolvedwiththeFiniteVolumeMethod(FVM)byuseofthesoftwareCFX-10.0.Theundulatoryandoscillatoryfinmovementsaremodelledwithanequationthatisimplementedwithinanadditionalsubroutineandjoinedwiththemainsolver.Numericalsimulationsarecarriedoutinthecomputationaldomain,inwhichonefinisfixedinaflow-throughwaterduct.SimulationsarecarriedoutintherangeoftheRenumberupto105.Theresultsshowsignificantinfluenceofappliedfinmotiononthevelocitydistributioninthesurroundingfluid.

简介：客观：调查运动人工制品的影响在上三维(3D)重建体积和保角的放射疗法计划。方法：能沿着头部尾的方向模仿肺肿瘤的片断运动的一个幽灵被步进马达构造，聚乙烯和土豆的小球。十个不同扫描协议被设置，幽灵的CT数据被使用一台商业GELightSpeed16CT扫描仪获得。CT数据的3D重建被采用GEAdvantageSim6.0系统的显示卷的技术实现。在不同扫描协议的每个目标的重建的体积通过测量工具的3D被测量。因此，在动人的目标和静态的之间的重建体积的相对偏差是坚定的。三维的保角的放射治疗(3DCRT)计划和保角的地与计划系统(TPS)的WiMRT处理为一个静态/动人的目标被创造并且比较。结果:为一个静态的目标，当CT数据与不同程度和片被获得时，在3D重建卷之中没有明显的差别。3D重建体积和3D的外观一个动人的目标的保角的地与静态的的相当不同。最大的相对偏差为与不同扫描协议扫描的一个动人的目标是将近90%。相对偏差在不同目标之中是可变的，关于从-39.8%到89.5%为一个更小的目标并且从-18.4%到20.5%为更大的one.Conclusion:运动人工制品在3D-CRT计划和重建体积上有大效果，它将极大地为一个动人的目标导致弄歪的保角的放射域和假DVH。

简介：就静态的稳定性和排水量体积的变化而言，包括非线性的术语和即时波浪出现的更高的顺序的影响，非线性的联合举沥青运动在随机的波浪被建立。联合的举沥青的回答打手势因为Truss海岸警卫队女子后备队队员站台被调查。当一个随机的波浪的典型频率接近自然的举频率时，大振幅沥青运动在参量力量的刺激下面被导致，这被发现，它被称为Mathieu不稳定性。举运动振幅什么时候超过某个程度，被观察举模式精力被转移搭模式。另外，当典型波浪频率离开自然的举频率时，内部反响的举沥青运动的概率极大地被减少。

简介：Byutilizingthebarotropicvorticityequationincludingeffectsoforographyandhorizontaldiffusion,thelinearizedequationsdescribingsymmetricandantisymmetricmotionsandtheiranalyticsolutionsarepre-sented.Itcanbefoundfromthesolutionsthatnomatterwhatkindofmotionmaybe,eachsolutionconsistsofthreewaves,namely,Rossbywaverelatedtoinitialvalues,marchingwavepropagatingatRossbywavevelocityandstationarywave.Thelattertwoarecloselyrelatedtoorographyandhorizontaldiffusion.However,ifthemotionissymmetricattheinitialinstant,thentheantisymmetriccomponentsoforographyandofhorizontaldiffusionarelikelytoleadtothegenerationofantisymmetricmotion.Inthesteadystate,thesymmetricflowisconnectedwithsymmetricorographyandhorizontaldiffusionandtheantisymmetricflowwithantisymmetricorographyandhorizontaldiffusion.Further,inordertoverifytheaboveanalysis,threenumericalexperimentshavebeenmade.Theresultsshowthatantisymmetricorographycanproduceantisymmetricmotion.Finally,theatmosphericinteractionsbetweenNorthernandSouthernHemispheresarediscussed.

简介：在在活动的沙沙丘上的狂暴的液体运动和沉积粒子运动之间的关系被在在USDA-ARS-National沉积实验室执行的实验室实验使用激光Doppler速度计和一个声学的反散射系统调查。当以活动沙丘bedforms的速度下游地翻译两台测量设备时，从粒子和at-a-point骚乱数据的声学的反散射的侧面被收集。产生数据集合被用来检验波动的反散射和液体速度信号基于标准差在超过了大小阀值的频率(复发频率)()本地速度和大小从推迟的粒子源于反散射的声学的信号。下游、垂直的速度复发频率的斜坡通常与增加举起显示了一逐渐地增加的复发时间。为声学的反散射数据的复发频率不与举起是强烈可变的。在在1大小阀值的沉积反散射和垂直速度的复发频率之间的最靠近的通讯被X/L在一个区域定义<0.4并且y<6厘米。下游的速度是最仔细与在在0.4点的一个小区域的反散射有关

简介：在Xinjiang的79个城市的地震风险分析结果被介绍，并且基岩山峰在三个地震层次和他们的比率下面扎根了加速被讨论。然后，在地震环境之间的关系和不同超过的可能性的地震风险分析结果被研究。次要、主要的地震运动参数从中等地震计算了的结果表演没在不同exceedance可能性下面有一致可能性和基岩山峰加速的比率密切与地震环境被相关。

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简介：AccordingtotheChineseGB50011-2001codeandtherecommendedprovisionsofFEMANEHRPandEUROCODE8,byusingshearwavevelocityandboreholedata,thesiteclassificationisevaluatedforatypicalsoftsoilsiteontheYantaiseacoast.Thesiteseismicgroundmotioneffectisanalyzedandtheinfluenceofthecoastalsoilondesigngroundmotionparametersisdiscussed.Theresultsshowthatthebriefsiteclassificationcannotrepresenttherealconditionsofasoftsoilsite;thesoftsoilonthecoasthasaremarkableimpactonthemagnitudeandspectrumofgroundmotionacceleration.Themagnificationonpeakaccelerationisbigger,however,duetothenonlineardeformationofthesoil.Themagnificationisreducednonlinearlywiththeincreaseofinputgroundmotion;thespectrumisbroadenedandthecharacteristicperiodelongatedonthesoftsoilsite.

简介：腱垂直地系在因此，物理腱压力的深理解要求的紧张腿平台(TLP)腱的全部的轴的变丑的决心，它是举，沥青，和澎湃的回答的联合。TLP的侧面的方面的垂直运动被结合巨浪并且组成沥青运动的部分。腱被连接到TLP的方面；因此，侧面的方面的全部的排水量与腱和全部的轴的压力的全部的变丑有关。因此，在TLP的方面调查全部的垂直反应是必要的。在自由的各种各样的度之间联合没在反应振幅操作员(RAO)被考虑。因此在频率领域分析，估计的垂直RAO是不完全的。在时间领域，另外，在TLP的中心的仅仅举运动典型地被学习；这个问题需要被处理。在这份报纸，我们在频率和时间领域在TLP的方面在垂直反应调查沥青运动的部分。数字结果在一些时期范围在TLP的边的垂直运动表明沥青运动的重要效果。

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简介：在这份报纸，扩大因素ks偷看有在在山东省上的班和地点上的不同exceedance概率的地面运动被分析从班地点的358地上凿穿和班的140地上凿穿收集的土壤层的地震反应数据估计地点。从结果，一个人能结束那1ks的scatter阴谋通常服从正常分布；有输入地面的力量的增加的2ks减少打手势，它比在班lI地点在班地点是更明显的；3随磨擦运动输入的基岩接口的深度的增加，为类地点，ks逐渐地增加直到到稳定的值深度什么时候到达直到约20米或更大。然而为班地点，ks对深度感觉迟钝；4为班地点的ks的一般水准是1.47，比在中国GB18306-2001的地震地面运动参数带状配列地图使用了那稍微大。另外，在在在山东省上的山峰地面加速的不同层次的班和地点上的kspreliminarily在纸被讨论。

简介：Weappliedthediscreteelementmethod(DEM)ofsimulationmodifiedbyanenlargedparticlemodeltosimulatebeadmotioninalargebeadmill.Thestainless-steelbeadmillhasinnerdiameterof102mmandmilllengthof198mm.Thebeaddiameterandfillingratiowerefixedrespectivelyat0.5mmand85%.Theagitatorrotationalspeedwaschangedfrom1863to3261rpm.Thebeadmotionwasmonitoredexperimentallyusingahigh-speedvideocamerathroughatransparentmillbody.Forthesimulation,enlargedparticlesizesweresetas3-6mmindiameter.WiththeDEMmodifiedbytheenlargedparticlemodel,themotionofenlargedparticlesinamillwassimulated.Thevelocitydataofthesimulatedenlargedparticleswerecomparedwiththoseobtainedintheexperiment.ThesimulatedvelocityoftheenlargedparticlesdependsonthevirtualfrictionalcoefficientintheDEMmodel.Theoptimizedvalueofthevirtualfrictionalcoefficientcanbedeterminedbyconsideringtheaccumulatedmeanvalue.Resultsshowthatthevelocityoftheenlargedparticlessimulatedincreaseswithanincreaseintheoptimumvirtualfrictionalcoefficient,butthesimulatedvelocityagreeswellwiththatdeterminedexperimentallybyoptimizingthevirtualfrictionalcoefficientinthesimulation.Thecomputingtimeinthesimulationdecreaseswithincreasedparticlesize.

简介：在这份报纸，我们首先学习部分Brownian运动与non-Lipschitz系数驾驶的随机的微分方程的答案的存在和唯一。然后，我们在部分Browmian运动与小散开多于一半关于林中小丘参数驾驶的随机的微分方程调查爆炸时间。

简介：Weproposedaschemeforthereconstructionofthequantumstatesforthecenter-of-massvibrationalmodeoftwotrappedions.Intheschemetheionsaremultichromaticallyexcitedbythreelasers.ThenmeasurementofthedifferencebetweenprobabilitiesoftheionsbeingbothinelectronicgroundandexcitedstatesdirectlyyieldstheWignercharacteristicfunctionforthecenter-of-massvibrationalstate.Theschemecanalsobeusedtoprepareentangledcoherentstatesforthecenter-of-massandrelativevibrationalmodes.