简介：Theobjectiveofthispaperistodevelopaneuralnetwork-basedresidualgeneratortodetectthefaultintheactuatorsforaspecificcommunicationsatelliteinitsattitudecontrolsystem(ACS).First,adynamicmultilayerperceptronnetworkwithdynamicneuronsisused,theseneuronscorrespondtoasecondorderlinearInfiniteImpulseResponse(IIR)filterandanonlinearactivationfunctionwithadjustableparameters.Second,theparametersfromthenetworkareadjustedtominimizeaperformanceindexspecifiedbytheoutputestimatederror,withthegiveninput-outputdatacollectedfromthespecificACS.Then,theproposeddynamicneuralnetworkistrainedandappliedfordetectingthefaultsinjectedtothewheel,whichisthemainactuatorinthenormalmodeforthecommunicationsatellite.Thentheperformanceandcapabilitiesoftheproposednetworkweretestedandcomparedwithaconventionalmodel-basedobserverresidual,showingthedifferencesbetweenthesetwomethods,andindicatingthebenefitoftheproposedalgorithmtoknowtherealstatusofthemomentumwheel.Finally,theapplicationofthemethodsinasatellitegroundstationisdiscussed.

简介：Anewmethodforpoint-polygonclassificationispresentedinthepaper.Thebasicideaofthemethodisfirstadvancedandthentwopropertiesofpolygonareintroduced.Thecriterionsforpoint-polygonclassificationaregivenexplicitly.Theanalysisshowsthatthepossessesperfectfunction,extensivesuitabilityandhighefficiency.

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简介：顺序的点树提供最先进的技术因为使点模型变为，由重排层次根据为快显示在GPU上跑的几何错误顺序指。这篇论文论述一个看法依赖者方法由在层次点的顺序的表嵌入层次树结构扩充顺序的点树。由方法，二种索引被构造便于近从主要在一份订单显示到远方的点；从对粗糙好。作为结果，不可见的点能为硬件加速在高效率view-dependently被挑选，；同时，顺序的点树的优点能仍然充分被拿。因此，新方法能跑得比常规顺序的点树快得多，；当目标拥有复杂吸藏关系时，加速能高度特别地被支持；因为不可见的点将在在更好的层次的点的一个高百分比，仔细看了。

简介：Inthispaper,twoapproachesareusedtosolvethePerspectiveThree-PointProblem(P3P):thesymboliccomputationapproachandthegeometricapproach.Inthesymboliccomputationapproach,weuseWu-Ritt'szerodecompositionalgorithmtogiveacompletetriangulardecompositionfortheP3Pequationsystem.ThisdecompositionprovidesthefirstcompleteanalyticalsolutiontotheP3Pproblem.Inthegeometricapproach,wegivesomepuregeometriccriteriaforthenumberofrealphysicalsolutions.Thecompletesolutionclassificationfortwospecialcaseswiththreeandfourparametersisalsogiven.

简介：近日，CheckPoint公司一款为小型企业设计的Safe@Office(tm)安全专用设备最新上市!

简介：AnewmethodforrecognizingChinesecharactersisproposed.Itisbasedontheso-calledfeaturepointsofChinesecharacters.Thefeaturepointsweuseincludethoseonthestrokeofacharacter.i.e.,endpoints.turningpoints,forkpointsandcrosspoints.andthekeypointsonthebackgroundofcharacter.ThismethoddiffersfromthepreviousonesforitcombinesthefeaturepointsonstrokewiththoseonbackgroundanditusesfeaturepointstorecognizeChinesecharactersdirectly.AChinesecharacterrecognitionsystembasedtotop-downdynamicalmatchingoffeaturepointisdeveloped.Thesystemcanrecognizenotonly6763printedsampleSongfontChinesecharactersofsize5.6×5.6mm^2withhighrecognitionrate,butalsothegeneralprintedbooks,magazinesanddocumentswithasatisfactoryrecognitionrateandspeed.

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简介：6月7日，互联网安全解决方案供应商CheckPoint软件技术有限公司在美国宣布推出ConnectraNGX，这是其SSLVPN解决方案的增强版本。ConnectraNGX充分发挥了CheckPoint最近推出的NGX平台的全新连接功能，以及支持中央化安全监控及维护的SmartCenter。ConnectraNGX有下列特点：

简介：我们在场统一的一个多水平分区为能被设计或在一种含蓄的形式代表的表面重建的代数学的集合表面(MPU-APSS)。代数学的点集合表面(APSS)用本地移动从一套未组织起来的点定义光滑的表面最少平方(MLS)代数学的范围适合。由于本地性质，然而，APSS不为几何学编辑并且当模特儿工作很好。相反，我们的方法基于统一途径的分区为散布的点集合造一个含蓄的近似函数。由使用octree分策略，我们适应地首先为点集合构造本地代数学的范围，然后使用weighting功能一起混合这些本地形状功能。最后，我们从表面计算签署的距离功能的控制错误的近似。另外，我们在场为点使我们的表示合适的一个有效设计操作员设定过滤并且动态点采样。我们为表面重建并且几何学当模特儿例如表面结束表明我们的统一途径的有效性。

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简介：Inthispaper,ageometry-basedpointcloudreductionmethodisproposed,andareal-timemobileaugmentedrealitysystemisexploredforapplicationsinurbanenvironments.Weformulateanewobjectivefunctionwhichcombinesthepointreconstructionerrorsandconstraintsonspatialpointdistribution.Basedonthisformulation,amixedintegerprogrammingschemeisutilizedtosolvethepointsreductionproblem.Themobileaugmentedrealitysystemexploredinthispaperiscomposedoftheofttineandonlinestages.Attheofflinestage,webuildupthelocalizationdatabaseusingstructurefrommotionandcompressthepointcloudbytheproposedpointcloudreductionmethod.Whileattheonlinestage,wecomputethecameraposeinrealtimebycombininganimage-basedlocalizationalgorithmandacontinuousposetrackingalgorithm.Experimentalresultsonbenchmarkandrealdatashowthatcomparedwiththeexistingmethods,thisgeometry-basedpointcloudreductionmethodselectsapointcloudsubsetwhichhelpstheimage-basedlocalizationmethodtoachievehighersuccessrate.Also,theexperimentsconductedonamobileplatformshowthatthereducedpointcloudnotonlyreducesthetimeconsumingforinitializationandre-initialization,butalsomakesthememoryfootprintsmall,resultingascalableandreal-timemobileaugmentedrealitysystem.

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简介：<正>故事简要美国总统在西班牙首都马德里演讲时遭遇恐怖袭击,总统在混乱中受到枪击,接着现场发生爆炸,上百人伤亡。这名总统原来是一个假货,特工提前获晓现场不安全,紧急换了替身,

简介：这份报纸调查在观察与多重时间延期为线性分离时间的系统弄平问题的定点。考虑的线性分离时间的系统有l+1条产量隧道。一个人是即时观察，其他人被耽搁。包含递归的算法和非递归的算法的定点smoothers被没有依靠系统扩大途径，使用革新分析理论设计。另外，这进一步被显示出定点的设计更光滑与象原来的系统的一样的尺寸沿1个Riccati方程下来到解决l+。

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

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简介：PI控制策略为一个水力的起重机吊杆系统(HCBS)的活跃抑制控制基于模糊集合点weighting列在后面被建议。控制Twovalve的PI控制器，基于列在后面的fuzzyset点weighting和一个有限半综合者(大规模集成电路)包括一个比例的前馈控制控制器，分别地被设计。大规模集成电路习惯于限制输出信号并且在光谱的低频率结束阻止。由使用一个范围照相机和电子反馈控制，在HCBS上抑制的尖端能人工地被调整。HOPSAN和MATLAB/SIMULINK的一种合作控制模拟技术被用于控制器设计。模拟结果证明建议PI控制系统让更少象更快的反应一样射。在操作期间在HCBS上抑制的尖端被改进。

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简介：最近CheckPoint软件技术有限公司推出一个全新安全设备系列,它包括7款根据软件刀片架构而优化的产品,其性能约是前代产品的三倍。这些产品的型号由桌面2200至21400,提供了不同的价格和性能选择,例如防火墙吞吐量高达100Gbps,甚至2,900个SecurityPowerUnits得分（SPU）,SPU是CheckPoint最近发布的安全性能评定新标准。