简介：Thispaperthoroughlyinvestigatestheproblemofrobotself-locationbylinecorrespondences.Theoriginalcontributionsarethree-fold:(1)Obtainthenecessaryandsufficientconditiontodeterminelinearlytherobot'sposebytwolinecorrespondences.(2)Showthatifthespacelinesareverticalones,itisimpossibletodeterminelinearlytherobot'sposenomatterhowmanylinecorrespondenceswehave,andtheminimumnumberoflinecorrespondencesis3todetermineuniquely(butnon-linearly)therobot'spose.(3)Showthatifthespacelinesarehorizontalones,theminimumnumberoflinecorrespondencesis3forlineardeterminationand2fornon-lineardeterminationoftherobot'spose.

简介：未来的互联网真会演变成3D世界吗？倘若果真如此，SecondLife的客户端将作为未来3DWeb世界的浏览器占尽先机。

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简介：Currently,thereareawiderangeoflinetypesinthefieldofarchdamdesigningandconstruction,andeachofthemmayhavetheirownstrengthandweaknessdisparately.Atrade-offbetweenthesize,stress,aswellastheconstructioncostandcomplexityofthedamneedstobemadeinordertoarriveatanewsolutioncalledthecycloidarchdam.ThroughredevelopmentofVBAusingAutoCAD,thearchringandthecenterofthearchlinehavebeendesigned.Also,thestressanalysisonparabolaandcycloidhavebeendone,whichprovidesatheoreticalprinciplethatthecycloidcouldberegardedasanewlinetypeofthearchdam.

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简介：ＡＮＥＷＰＬＡＮＡＲＢＯＯＬＥＡＮＯＰＥＲＡＴＩＯＮＡＬＧＯＲＩＴＨＭＢＡＳＥＤＯＮＬＩＮＥＳＥＧＭＥＮＴＳＯＲＴＩＮＧＭａＬｉｎ；ＤｕＸｉｑｉｎｇ；ＧｕａｎＲｏｎｇｃｈａｎｇＳＭＯＯＴＨＳＵＲＦＡＣＥＩＮＴＥＲＰＯＬＡＴＩＯＮＯＶＥＲＡＲＢＩＴＲＡ...

简介：Thispaperconsiderseigenstructureassignmentinsecond-orderlinearsystemsviaproportionalplusderivativefeedback.Itisshownthattheproblemiscloselyrelatedtoatypeofso-calledsecond-orderSylvestermatrixequations.Throughestablishingtwogeneralparametricsolutionstothistypeofmatrixequations,twocompleteparametricmethodsfortheproposedeigenstructureassignmentproblemarepresented.Bothmethodsgivesimplecompleteparametricexpressionsforthefeedbackgainsandtheclosed-loopeigenvectormatrices.Thefirstonemainlydependsonaseriesofsingularvaluedecompositions,andisthusnurnericallysimpleandreliable;thesecondoneutilizestherightfactorizationofthesystem,andallowsthedosed-loopeigenvaluestobesetundeterminedandsoughtviacertainoptimizationprocedures.Anexampleshowstheeffectivenessoftheproposedapproaches.

简介：WeconsiderafamilyofoptimalcontrolproblemswherethecontrolvariableisgivenbyaboundaryconditionofNeumanntype.Thisfamilyisgovernedbyparabolicvariationalinequalitiesofthesecondkind.Weprovethestrongconvergenceoftheoptimalcontrolandstatesystemsassociatedtothisfamilytoasimilaroptimalcontrolproblem.ThisworksolvestheopenproblemleftbytheauthorsinIFIPTC7CSMO2011.

简介：AnewapproachisproposedforautomaticallycreatingB-repmodelsofathree-dimensionalplanarobjectfromalinedrawingdepictingtheobjectunderorthographicallyaxonometricprojection.Anewlineparameterizationthatsatisfiestheuniqueness,boundednessanduniformnessforrepresentinglinesin2Dand3Dspaceisgiven.Accordingtothelocationrelationbetweenlinesandplanesofobjectdepictedbythelinedrawing,someconstraintsaboutobject's3Dinformationareproducedandalinearsystembasedonthoseconstraintsisestablished.3Dinformationofaplanarbodycanbeobtainedbysolvingthelinearsystem.Itisprovedthat,duringtheprocessing,thereexistedatleastfourdegreesoffreedom.ItismoreconvenienttouseinformationaboutlinesandplanesinsteadofpointsandplanesforcomputervisionandintelligentCADsystemstointerpretlinedrawingsofplanarobjects.

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简介：这份报纸建议为非奉献的簇设计的一台预言引擎，它能为平行应用估计重组时间，甚至面对工作站主人的连续工作量。预言引擎能被设置用三个不同评价核工作：一个历史的核，一个模拟核基于分析模型和两个的集成，命名的混合的核。这些评价建议集成于一个安排系统，说出CISNE，它能在一个联机或离线的模式被执行。建议评价方法的精确性在与安排政策在的不同工作的关系被评估一真实并且模仿的簇环境。在两环境，因为和历史的方法的精确性捕获非奉献的环境的精力就资源的状态而言估计应用程序运行时刻联合一台模拟引擎的能力，我们观察到混合系统给最好的结果。

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简介：滑动模式控制(FTSMC)计划的一个新奇模糊终端为秒顺序的一个类追踪非线性的不明确的系统的位置被建议。在建议计划，我们集成输入产量linearization技术取消非线性。由使用扩充afunction的滑动亢奋的飞机，追踪错误的产量在能任意地被设置的有限时间收敛到零，这被保证。建议计划消除到达阶段问题，以便靠近环的系统总是显示出不变性性质到参数不确定性。模糊逻辑系统被用来接近未知系统功能和开关条款。Robustadaptive法律被建议减少在真非线性的函数和模糊系统之间的近似错误，因此啁啾的现象能被消除。建议控制计划的稳定性被证明，计划被用于一个转换摆钟系统。模拟研究被提供证实建议控制途径的性能和有效性。

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简介：Accordingtothetopographyofmountains,thediscretedatapointsfrommapofthewholeregionarefirstsubdividedintosubregionswiththepointstakenfromthefeaturelinesofridge,valleyandscarpbeinginsertedintothemappointset,andusingthefeaturelinesastheboundariesofsubregionstobuildconstrainedDelaunayTIN.Suchanapproachhastheadvantagesofensuringhighaccuracyandfastspeedoflinelayout.

简介：Itisaresearchsubjectincomputervisionto3Dreconstructionofanobjectrepresentedbyasingle2Dlinedrawing.Previousworkson3Dreconstructionfrom2Dlinedrawingsfocusonobjectswithlines,plane,view,andsoon.Thispapermainlystudiesthe3Dreconstructionfrom2Dlinedrawings.Besides,anewapproachisproposed:itisthatfortheresearchofthepointcoordinatesof2Dlinedrawings,soastoachievetheobjectreconstructionbythereconstructionofpointcoordinates.Thereconstructionprocessincludes:①thecollectionofpointcoordinates(X,Y)of2Dlinedrawings;②thederivationofmathematicalformulaaboutthereconstructionofthepointof2Dlinedrawings,andcalculatingthecorrespondingpointofthe3Dcoordinates;③theregenerationof3Dgraphicswith3Dpoints;④analyzeerrorbytheproportionalofparallelofaxonometricprojection,inordertoprovetheaccuracyofthemethod.

简介：在这篇论文，用有限时间的控制方法，我们与未知却围住的骚乱认为骚乱是一个秒顺序系统的分析。我们证明秒顺序系统的状态将被稳定到包含起源的一个区域。这个区域的半径被控制参数决定并且能象一样被使变为小需要。严密稳定性分析也被给。与常规PD控制法律相比，有限时间的控制法律产出更好的骚乱拒绝表演。数字模拟结果显示出方法的有效性。

简介：Thehumanvisionsystemcanreconstructa3Dobjecteasilyfromsingle2Dlinedrawingsevenifthehiddenlinesoftheobjectareinvisible.Now,therearemanymethodshaveemulatedthisability,butwhenthehiddenlinesoftheobjectareinvisible,thesemethodscannotreconstructacomplete3Dobject.Therefore,weputforwardanewalgorithmtosettlethishardproblem.Ourapproachconsistsoftwosteps:(1)infertheinvisibleverticesandedgestocompletethelinedrawing,(2)proposeavertex-basedoptimizationmethodtoreconstructa3Dobject.