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17 个结果
  • 简介:我们允许的现在的算法与水彩颜料画外观的3D景色的即时显示。我们的途径提供视觉复杂性的适当简化,模仿水彩颜料的典型自然效果,;提供二种必要的画技术:wet-on-wet;wet-on-dry画。我们基于图象空间处理而非在准确模拟上专注于有效算法。这允许3D景色的即时显示。在一张动画期间,高frame-to-frame连贯能由于一个稳定的分割计划被完成。最后,我们无缝地从3D景色用信息把光滑的照明集成到水彩颜料图象。

  • 标签: 计算机制图 实时绘制 水彩画 复杂性
  • 简介:Actionrefinementforreal-timeconcurrentprocesseswithurgentinteractionsisstudied,whereapartial-ordersetting,i.e.,timedbundleeventstructures,isusedasthesystemmodelandareal-timeLOTOS-likeprocessalgebraisusedasthespecificationlanguage.Itisshownthattheproposedrefinementapproacheshavethecommonlyexpectedproperties:(1)thebehaviouroftherefinedprocesscanbeinferredcompositionallyfromthebehaviouroftheoriginalprocessandfromthebehaviouroftheprocessessubstitutedforactions;(2)thetimedextensionsofpomset(partiallyorderedmultiset)traceequivalenceandhistorypreservingbisimulationequivalencearebothcongruencesundertherefinement;(3)thesyntacticandsemanticrefinementscoincideuptotheaforementionedequivalencerelationswithrespecttoacpo-baseddenotationalsemantics.

  • 标签: 程序设计语言 语义学 协同程序 计算机
  • 简介:这篇论文论述从样品产生一套质地瓦的一个新奇方法,它能无缝地在real-time被并列进任意的尺寸质地。把方法比作存在,我们的途径在消除可以在存在方法的每瓦存在的视觉缝接更简单、更有益,特别当样品有精致的特征或不同颜色时。我们的途径产生的质地瓦能在每直角的方向边阶上被认为是单人赛有颜色的瓦,它为并列和对句子并列合适的更多是更容易的。试验性的结果表明我们的途径的可行性和有效性。电子增补材料这篇文章(doi:10.1007/s11390-007-9072-0)的联机版本contatins增补材料,它对授权用户可得到。

  • 标签: 计算机图形学 实时纹理合成 句子 视觉
  • 简介:Animportantconceptproposedintheearlystageofrobotpathplanningfieldistheshrinkingofarobottoapointandmeanwhiletheexpandingofobstaclesintheworkspaceasasetofnewobstacles.TheresultinggrownobstaclesarecalledtheConfigurationSpace(Cspace)obstacles.Thefind-pathproblemisthentransformedintothatoffindingacollision-freepathforapointrobotamongtheCspaceobstacles.However,theresearchexperienceshaveshownthattheCspacetransformationisveryhardwhenthefollowingsituationsoccur:1)boththerobotandobstaclesarenotpolygons,and2)therobotisallowedtorotate.Thissituationgetsevenworsewhentherobotandobstaclesarethreedimensional(3D)objectswithvariousshapes.Forthisreason,directpathplanningapproacheswithouttheCspacetransformationisquiteusefulandexpected.Motivatedbythepracticalrequirementsofrobotpathplanning,ageneralizedconstrainedoptimizationproblem(GCOP)withnotonlylogicANDbutalsologicORrelationshipswasproposedandamathematicalsolutiondevelopedpreviously.Thispaperinheritsthefundamentalideasofinequalityandoptimizationtechniquesfromthepreviouswork,convertstheobstacleavoidanceproblemintoasemi-infiniteconstrainedoptimizationproblemwiththehelpofthemathematicaltransformation,andproposesadirectpathplanningapproachwithoutCspacecalculation,whichisquitedifferentfromtraditionalmethods.Toshowitsmerits,simulationresultsin3Dspacehavebeenpresented.

  • 标签: 机器人技术 路径规划 智能技术 避障功能 约束优化
  • 简介:Multipleperformancerequirementsneedtobeguaranteedinsomereal-timeapplicationssuchasmultimediadataprocessingandreal-timesignalprocessinginadditiontotimingconstraints.Unfortunately,mostconventionalschedulingalgorithmsonlytakeoneortwodimensionsofthemintoaccount.Motivatedbythisfact,thispaperinvestigatestheproblemofprovidingmultipleperformanceguaranteesincludingtimeliness,QoS,throughput,QoSfairnessandloadbalancingforasetofindependenttasksbydynamicscheduling.Webuildaschedulermodelthatcanbeusedformulti-dimensionalscheduling.Basedontheschedulermodel,weproposeaheuristicmulti-dimensionalschedulingstrategy,MDSS,consistingofthreesteps.Thefirststepcanbeofanyexistingreal-timeschedulingalgorithmthatdeterminestoacceptorrejectatask.Instep2,weputforwardanovelalgorithmMQFQtoenhancetheQoSlevelsofacceptedtasks,andtomakethesetaskshavefairQoSlevelsatthesametime.AnothernewalgorithmITLBisproposedandusedinstep3.TheITLBalgorithmiscapableofbalancingloadandimprovingthroughputofthesystem.ToevaluatetheperformanceofMDSS,weperformextensivesimulationexperimentstocompareMDSSstrategywithMDSRstrategy,DASAPandDALAPalgorithms.ExperimentalresultsshowthatMDSSsignificantlyoutperformsMDSR,DASAPandDALAP.

  • 标签: 实时调度算法 异构集群 实时任务 多媒体数据处理 多维 实时信号处理
  • 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:Weproposeahumanavatarrepresentationschemebasedonintrinsiccoordinates,whichareinvarianttoisometryandinsensitivetohumanposechanges,andanefficientposetransferalgorithmthatcanutilizethisrepresentationtoreconstructahumanbodygeometryfollowingagivenpose.Suchaposetransferalgorithmcanbeusedtocontrolthemovementofanavatarmodelinvirtualrealityenvironmentsfollowingauser'smotioninrealtime.Ourproposedalgorithmconsistsofthreemainsteps.First,werecognizetheuser'sposeandselectatemplatemodelfromthedatabasewhohasasimilarpose;then,theintrinsicLaplacianoffsetsencodedinlocalcoordinatesareusedtoreconstructthehumanbodygeometryfollowingthetemplatepose;finally,themorphingbetweenthetwoposesisgeneratedusingalinearinterpolation.Weperformexperimentstoevaluatetheaccuracyandefficiencyofouralgorithm.Webelieveourproposedsystemisapromisinghumanmodelingtoolthatcanbeusedingeneralvirtualrealityapplications.

  • 标签: human body POSE TRANSFER local intrinsic
  • 简介:Inthispaper,aqualitativemodelcheckingalgorithmforverificationofdistributedprobabilisticreal-timesystems(DPRS)ispresented.ThemodelofDPRS,calledreal-timeprobabilisticprocessmodel(RPPM),isovercontinuoustimedomain.ThepropertiesofDPRSaredescribedbyusingdeterministictimedautomata(DTA).Thekeypartinthealgorithmistomapcontinuoustimetofinitetimeintervalswithflagvariables.Comparedwiththeexistingalgorithms,thisalgorithmusesmoregeneraldelaytimeequivalenceclassesinsteadoftheunitdelaytimeequivalenceclassesrestrictedbyeventsequence,andavoidsgeneratingtheequivalenceclassesofstatesonlyduetothepassageoftime.Theresultshowsthatthisalgorithmischeaper.

  • 标签: 计算机网络 自动化检验 实时系统
  • 简介:Thegeneralconceptofdatacompressionconsistsinremovingtheredundancyexistingindatatofindamorecompactrepresentation.Thispaperisconcernedwithanewmethodofcompressionusingthesecondgenerationwaveletsbasedontheliftingscheme,whichisasimplebutpowerfulwaveletconstructionmethod.Ithasbeenprovedbyitssuccessfulapplicationtoareal-timemonitoringsystemoflargehydraulicmachinesthatitisapromisingcompressionmethod.

  • 标签: 数据处理 数据压缩 实时监测系统
  • 简介:歌美X-760作为X-750的升级版本,除了直接支持高码率RMVB文件播放外,更追加了FLV视频的支持和强大的游戏功能。而除了强劲的视频播放性能外,X-760也具备了目前MP4市场上的大部分卖点功能。

  • 标签: Real X-760 高码率 游戏功能 升级版本 无损压缩
  • 简介:Aconsistentcheckpointingalgorithmwithshortfreezingtime(SFT)ispresentedinthispaper.Itsupportsfault-toleranceindistributedsystems,Thealgorithmhasshorterfreezingtime,loweroverhead,andsimplicityofrecovery.Tomakecheckpointtimeshorter,aspecialcontrolmessage(Munblock)isusedtoensurethataprocesscanrespondthecheckpointeventquicklyatanygiventime.Moreover,mainmemoryalgorithmisusedtoimprovetheconcurrencyofcheckpointing.ByusingSFT,thefreezingtimeresultedbycheckpointingislessthan0.03s.Furthermore,thecontrolmessagenumberofSFTisonlyO(n).

  • 标签: 容错 分布计算机系统 PVM 检测点
  • 简介:数据存取延期成为了高端计算系统的突出的性能瓶颈。在系统设计减少数据存取延期的关键是减少数据货摊时间。存储器地区和并发是影响现代存储器系统的性能的二个必要因素。因为全面存储器系统性能上的存储器并发的影响很好没被理解,然而,存在在利用数据存取并发上在很少减少数据货摊时间学习焦点。在这研究,一双新奇数据货摊时间模型,为地区和并发的联合努力的L-C模型和为数据上的纯失误的效果的下午模型阻止时间,被介绍。模型提供数据存取延期的新理解并且为表演优化提供新方向。基于这些新模型,先进缓存优化的一张概括表格被介绍。当时,被数据并发贡献了,把38个条目仅仅,21个条目由数据地区作出贡献,它显示出数据并发的值。在这研究介绍的L-C和下午模型和他们的联系结果和机会为数据中央的建筑学和算法现代计算系统设计的未来重要、必要。

  • 标签: 数据访问 并发性 失速 时间 存储器系统 评估
  • 简介:Thispaperdescribesamaximumtimedifferencepipelinedarithmeticchip,the36-bitadderandsubtractorbasedon1.5μmCMOSgatearray.Thechipcanoperateat60MHz,andconsumeslessthan0.5Watt.Theresultsarealsostudied,andamoreprecisemodelofdelaytimedifferenceisproposed.

  • 标签: 加法器 CMOS 门阵列 最大时间差
  • 简介:Thewidespreadoflocation-basedsocialnetworksbringsaboutahugevolumeofusercheck-indata,whichfacilitatestherecommendationofpointsofinterest(POIs).Recentadvancesondistributedrepresentationshedlightonlearninglowdimensionaldensevectorstoalleviatethedatasparsityproblem.CurrentstudiesonrepresentationlearningforPOIrecommendationembedbothusersandPOIsinacommonlatentspace,andusers'preferenceisinferredbasedonthedistance/similaritybetweenauserandaPOI.SuchanapproachisnotinaccordancewiththesemanticsofusersandPOIsastheyareinherentlydifferentobjects.Inthispaper,wepresentanoveltranslation-based,timeandlocationaware(TransTL)representation,whichmodelsthespatialandtemporalinformationasarelationshipconnectingusersandPOIs.Ourmodelgeneralizestherecentadvancesinknowledgegraphembedding.Thebasicideaisthattheembeddingofa〈time,location〉paircorrespondstoatranslationfromembeddingsofuserstoPOIs.SincethePOIembeddingshouldbeclosetotheuserembeddingplustherelationshipvector,therecommendationcanbeperformedbyselectingthetop-kPOIssimilartothetranslatedPOI,whichareallofthesametypeofobjects.Weconductextensiveexperimentsontworeal-worlddata.sets.TheresultsdemonstratethatourTransTLmodelachievesthestate-of-the-artperformance.Itisalsomuchmorerobusttodatasparsitythanthebaselines.

  • 标签: point of INTEREST (POI) recommendation location-based
  • 简介:作为新一代All—in-one家用投影机.DV11秉承了DV10的飞碟式造型.整体仍然以黑白双色为主.左右两旁的凹陷部分皆为散热孔装置.旁边突起的部分则是两个功率为5W的扬声器。与DV10一样。DV11将DVD光驱集成在了机身顶部.不过与DV10采用的掀盖式DVD光驱不同.DV11改为了吸入式光驱.并且位置更为靠后。吸入式光驱的采用.不仅减小了体积.更增添了产品的一体性。在顶部靠后的地方是各种操作按钮.被分成了两个部分,左侧是投影机操作键,右侧是DVD操作键。

  • 标签: OPTOMA MOVIE 影音娱乐 DVD光驱 家用投影机 操作按钮
  • 简介:Generalpurposeprocesser(GPP)basedsoftware-definedradio(SDR)platformsprovidewirelesscommunicationsystemengineerswithmaximalarchitectureflexibilityandversatilitytoconstructawidebandwirelesscommunicationsystem.Nevertheless,thelackofhardwarereal-timetimingcontrolmakesitdifficulttoachievetimesynchronizationbetweenthebasestationandtheterminals.Inthispaper,asoftware-basedtimesynchronization(STS)methodisproposedtorealizethetimesynchronizationoftimedivisionmultipleaccess(TDMA)basedwirelesscommunicationsystems.Ahighprecisionsoftwareclocksourceisfirstlyconstructedtomeasuretheelapseofprocessingtime.TheRound-TripDelay(RTD)algorithmisthenpresentedtocalculatetimingadvancevaluesandachievetimesynchronization.AnexampleTDMAsystemisimplementedonMicrosoftSoraplatformstoevaluatetheperformance.ExperimentsshowthattheproposedmechanismiseffectivetoenabletimesynchronizationforwidebandwirelesscommunicationsystemsonGPP-basedSDRplatforms.

  • 标签: 宽带无线通信系统 软件无线电平台 时间同步 GPP 同步方法 Microsoft