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71 个结果
  • 简介:人的姿势预言是为设计的一个关键因素;工作区的评估,在用虚拟人的虚拟环境。这个工作介绍一个新接口;为直接的人的虚拟环境优化了姿势预言(D-HOPP)在活动范围姿势必要的地方,来临到预言数字人的现实主义的活动范围姿势躯干的使用,手臂,;颈。在取决于什么类型任务正在被完成的地方,D-HOPP基于竞争,;人的姿势被不同人的性能测量管理。人的性能测量是一个基于物理的度量标准,例如精力或不快,;在优化明确的表达用作一个目标函数。这个问题作为单个目的的优化(SOO)被提出有单个性能测量的问题;作为multi-objective-optimization(哞)有多重联合性能测量的问题。我们使用联合排水量,在势能的变化,;肌与骨的不快是性能测量。D-HOPP与一个广泛的还直觉的用户接口被装备,;结果在交互虚拟环境被介绍。

  • 标签: 虚拟环境 人类模型 MOO 模拟技术 工作空间评价
  • 简介:在这篇论文,有变化时间的延期的神经网络的全球指数的柔韧的稳定性被调查。由使用非否定的矩阵理论和Halanay不平等,为全球指数的柔韧的稳定性的一个新足够的条件被介绍。获得的结果与不同或改进在文学报导的一些存在的,这被显示出。最后,一些数字例子和模拟被给显示出获得的结果的有效性。

  • 标签: 鲁棒稳定性 神经网络 指数 延迟 时变 非负矩阵理论
  • 简介:Inthispaper,anewmethod,namedasL-treematch,ispresentedforextractingdatafromcomplexdatasources.Firstly,basedondataextractionlogicpresentedinthiswork,anewdataextractionmodelisconstructedinwhichmodelcomponentsarestructurallycorrelatedviaageneralizedtemplate.Secondly,adatabase-populatingmechanismisbuilt,alongwithsomeobject-manipulatingoperationsneededforflexibledatabasedesign,tosupportdataextractionfromhugetextstream.Thirdly,top-downandbottom-upstrategiesarecombinedtodesignanewextractionalgorithmthatcanextractdatafromdatasourceswithoptional,unordered,nested,and/ornoisycomponents.Lastly,thismethodisappliedtoextractaccuratedatafrombiologicaldocumentsamountingto100GBforthefirstonlineintegratedbiologicaldatawarehouseofChina.

  • 标签: 树型匹配 数据分离模型 分离算法 逻辑性 数据库
  • 简介:金秋收获的季节对于德国法兰克福城郊的小镇克隆博格(Kronberg)来说更加意义非凡。除了飘香的瓜果,闻名遐迩的博朗国际工业设计大赛也最终汇聚到了众多出色的新式构想,一场专为活力四射的年轻人而喝彩设计盛宴在上演。经过历时一年的耕耘,来自全球的900多份作品把一幅幅生动的未来科技与生活图景展现在人们面前。随后经过百余名权威人士的甄选,最终4位年轻设计师的未来科技概念和20位同龄者的生活畅想脱颖而出。汇聚在克隆博格小镇的一切新奇想法正在蛊惑人们对未来无限的憧憬和期待。

  • 标签: 克隆 NEW 聚集 德国法兰克福 工业设计 年轻人
  • 简介:Anew3Dsurfacecontouringandrangingsystembasedondigitalfringeprojectionandphaseshiftingtechniqueispresented.Usingthephase-shifttechnique,pointscloudwithhighspatialresolutionandlimitedaccuracycanbegenerated.Stereo-pairimagesobtainedfromtwocamerascanbeusedtocompute3Dworldcoordinatesofapointusingtraditionalactivetriangulationapproach,yetthecameracalibrationiscrucial.Neuralnetworkisawell-knownapproachtoapproximateanonlinearsystemwithoutanexplicitphysicalmodel,inthisworkitisusedtotrainthestereovisionapplicationsystemtocalculating3Dworldcoordinatessuchthatthecameracalibrationcanbebypassed.Thetrainingsetforneuralnetworkconsistsofavarietyofstereo-pairimagesandthecorresponding3Dworldcoordinates.Thepictureelementscorrespondenceproblemissolvedbyusingprojectedcolor-codedfringeswithdifferentorientations.Colorimbalanceiscompletelyeliminatedbythenewcolor-codedmethod.Oncethehighaccuracycorrespondenceof2Dimageswith3Dpointsisacquired,highprecision3Dpointscloudcanberecognizedbythewelltrainednet.Theobviousadvantageofthisapproachisthathighspatialresolutioncanbeobtainedbythephase-shiftingtechniqueandhighaccuracy3Dobjectpointcoordinatesareachievedbythewelltrainednetwhichisindependentofthecameramodelworksforanytypeofcamera.Someexperimentsverifiedtheperformanceofthemethod.

  • 标签: 3D shape measurement color-coded FRINGE NEURAL
  • 简介:Inthispaper,ananalyticaltechniqueispresentedfortimedomainanalysis(transientandsteady-stateresponse)ofperturbedPWMpush-pullDC-DCconverterusinginterestingcorollaryonKharitonov'stheorem.ThemainadvantageoftheproposedanalysisisthateventhoughthetransferfunctionmodelofaPWMpush-pullDC-DCconverterisperturbed,thecompleteanalysishasbeendoneonalineartransferfunctionmodelofaPWMpush-pullDC-DCconverter.TheproposedanalysisisverifiedusingMATLABsimulation.Thisanalysiswillbeverymuchusefultopowerelectronicsengineers,sincethetechniqueisverysimpleandcomputationallyefficientandeasilyapplicableinpreciseapplicationssuchasaerospaceapplications.

  • 标签: DC-DC转换器 时域分析 PWM 推挽式 传递函数模型 MATLAB
  • 简介:Recently,switchedcontrolsystemshavebeenattractingmuchattentionmthecontrolcommunitybecausetheproblemsarenotonlyacademicallychallengingfortheinherentcomplexity,butalsoofpracticalimportanceduetoitswiderangesofapplicationsinnature,engineering,andsocialsciences.

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  • 简介:Wereviewtheliteratureonapproximatedynamicprogramming,withthegoalofbetterunderstandingthetheorybehindpracticalalgorithmsforsolvingdynamicprogramswithcontinuousandvector-valuedstatesandactionsandcomplexinformationprocesses.Webuildontheliteraturethathasaddressedthewell-knownproblemofmultidimensional(andpossiblycontinuous)states,andtheextensiveliteratureonmodel-freedynamicprogramming,whichalsoassumesthattheexpectationinBellman'sequationcannotbecom...

  • 标签: 近似动态编程 加强学习 最佳的控制 近似算法