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70 个结果
  • 简介:在这份报纸,我们探索在从一个微分几何观点学习moduli问题是很有用的虚拟技术。我们介绍新目标鈥渧irtualmanifolds/orbifolds鈥的一个班吗?在哪个上我们开发集成理论。特别地,虚拟本地化公式被获得。关键词虚拟manifolds-本地化-Fredholm系统-第一写作的moduli空格先生(2000)题目分类57R99被一个NSF关键工程和973工程2006CB805900支持

  • 标签: 虚拟技术 流形 本地化 amp 对象类 虚拟化
  • 简介:Inordertoimprovetheabilitytolocalizeasourceinanuncertainacousticenvironment,aBayesianapproach,referredtohereasBayesianlocalizationisusedbyincludingtheenvironmentintheparametersearchspace.Geneticalgorithmsareusedfortheparameteroptimization.Thismethodintegratestheaposteriorprobabilitydensity(PPD)overenvironmentalparameterstoobtainasequenceofmarginalprobabilitydistributionsoversourcerangeanddepth,fromwhichthemost-probablesourcelocationandlocalizationuncertaintiescanbeextracted.Consideringthattheseabeddensityandattenuationarelesssensitivetotheobjectivefunctionofmatchedfieldprocessing,weutilizetheempiricalrelationshiptoinvertthoseparametersindirectly.ThebroadbandsignalsrecordedbyaverticallinearrayinaYellowSeaexperimentin2000areprocessedandanalyzed.Itwasfoundthat,theBayesianlocalizationmethodthatincorporatestheenvironmentalvariabilityintotheprocessor,madeitrobusttotheuncertaintyintheoceanenvironment.Inaddition,usingtheempiricalrelationshipcouldenhancethelocalizationaccuracy.

  • 标签: 贝叶斯方法 定位方法 海洋环境 概率密度 不确定性 匹配场处理
  • 简介:THEDISTURBANCELOCALIZATIONPROBLEMFORSINGULARSYSTEMSTanLiansheng(WuhanInst.ofMath.Sci.,Chin.Acad.ofSci.,Wuhan430071,China.)Abs...

  • 标签: SINGULAR system DISTURBANCE localilation INVARIANT SUBSPACE
  • 简介:Withthefast-pacedchangesbroughtaboutbyglobalizationandtechnologicaldevelopment,Englishlanguageteachinghasexperiencedglobalizationandlocalization.Asaveryimportantphenomenon,ithasbeeninfluencingeveryaspectinChina,suchaseducation,culture,waysoflifeandsoon.ThispaperfocusesontherealizationoflocalizationofEnglishteachinginChinaandgivesfactsandreasonsthatinfluencetheprocessoflocalization.

  • 标签: 英语教育 中国 教学方法 教学理论
  • 简介:1997)andhasbecomeoneofthetwoflagshipsofjournalismprograms(TheotheristhejournalismprogramofthePeople’sUniversity)acrossChina.TheFudanJournalismCollegenotonlyhasitstraditionalsequenceinJournalism,thewriterhasconductedasurveyamongthejournalismstudentsaswellassomefacultymembersamongthefivejournalismprogramsinShanghaiinSeptember1999.,aconsistentprocessoflocalizationinitscurriculumandteachingmethodsaswellasitstargets.Thepaperwillfirstdiscusstheprocessoflocalizationinthe50yearsdevelopmentofjournalismeducationinChinaintermsofeducationalpurposesandchangesofcurriculum.BasedontheasurveyofthefivejournalismprogramsinShanghai

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  • 简介:本地化是在无线传感器网络的实质的问题之一。为活动烽火本地化的关键问题是怎么选择适当烽火轨道。然而,很少研究都没在它上被做。在这篇论文,第一,我们推出位置的数字让烽火根据ROI(兴趣的区域)的面积送一个包;下我们在场一个新奇方法基于虚拟力量到在任意的ROI安排位置;然后,我们使用TSP(旅行售货员问题)算法到位置顺序到获得最佳的旅游路径,即减少的烽火轨道。活动烽火什么时候沿着旅游路径移动,送RF,在每个位置发信号,在ROI的传感器能与trilateration得出他们的位置。试验性的结果证明本地化方法,基于烽火减少的路径,是有效的;有灵活精确性。

  • 标签: 计算机网络 传感器 移动灯塔 虚拟技术
  • 简介:Debuggingisatime-consumingtaskinsoftwaredevelopment.Althoughvariousautomatedapproacheshavebeenproposed,theyarenoteffectiveenough.Ontheotherhand,inmanualdebugging,developershavedifficultyinchoosingbreakpoints.Toaddresstheseproblemsandhelpdeveloperslocatefaultseffectively,weproposeaninteractivefault-localizationframework,combiningthebenefitsofautomatedapproachesandmanualdebugging.Beforethefaultisfound,thisframeworkcontinuouslyrecommendscheckingpointsbasedonstatements'suspicions,whicharecalculatedaccordingtotheexecutioninformationoftestcasesandthefeedbackinformationfromthedeveloperatearliercheckingpoints.Thenweproposeanaiveapproach,whichisaninitialimplementationofthisframework.However,withthisnaiveapproachormanualdebugging,developers'wrongestimationofwhetherthefaultystatementisexecutedbeforethecheckingpoint(breakpoint)maymakethedebuggingprocessfail.Soweproposeanotherrobustapproachbasedonthisframework,handlingcaseswheredevelopersmakemistakesduringthefault-localizationprocess.Weperformedtwoexperimentalstudiesandtheresultsshowthatthetwointeractiveapproachesarequiteeffectivecomparedwithexistingfault-localizationapproaches.Moreover,therobustapproachcanhelpdevelopersfindfaultswhentheymakewrongestimationatsomecheckingpoints.

  • 标签: 故障定位 反馈信息 测试用例 软件开发 框架基础 调试方法
  • 简介:Theaccuracyoffacealignmentaffectsgreatlytheperformanceofafacerecognitionsystem.Sincethefacealignmentisusuallyconductedusingeyepositions,thealgorithmforaccurateeyelo-calizationisessentialfortheaccuratefacerecognition.Inthispaper,analgorithmisproposedforeyelocalization.First,theproperAdaBoostdetectionisadaptivelytrainedtosegmenttheregionbasedonthespecialgraydistributionintheregion.Afterthat,afastradialsymmetryoperatorisusedtopre-ciselylocatethecenterofeyes.Experimentalresultsshowthatthemethodcanaccuratelylocatetheeyes,anditisrobusttothevariationsoffaceposes,illuminations,expressions,andaccessories.

  • 标签: 脸部识别技术 计算机技术 识别模式 信号
  • 简介:Geographiclocationofnodesisveryusefulinasensornetwork.Previouslocalizationalgorithmsassumethatthereexistsomeanchornodesinthiskindofnetwork,andthenothernodesareestimatedtocreatetheircoordinates.Oncetherearenotanchorstobedeployed,thoselocalizationalgorithmswillbeinvalidated.Manypapersinthisfieldfocusonanchor-basedsolutions.Theuseofanchorsintroducesmanylimitations,sinceanchorsrequireexternalequipmentssuchasglobalpositionsystem,causeadditionalpowerconsumption.Anovelpositioningalgorithmisproposedtouseavirtualcoordinatesystembasedonanewconcept-virtualanchor.Itisexecutedinadistributedfashionaccordingtotheconnectivityofanodeandthemeasureddistancestoitsneighbors.Boththeadjacentmemberinformationandtherangingdistanceresultarecombinedtogeneratetheestimatedpositionofanetwork,oneofwhichisindependentlyadoptedforlocalizationpreviously.Atthepositionrefinementstagetheintermediateestimationofanodebeginstobeevaluatedonitsreliabilityforpositionmutation;thusthepositioningoptimizationprocessofthewholenetworkisavoidedfallingintoalocaloptimalsolution.Simulationresultsprovethatthealgorithmcanresolvethedistributedlocalizationproblemforanchor-freesensornetworks,andissuperiortopreviousmethodsintermsofitspositioningcapabilityunderavarietyofcircumstances.

  • 标签: 分布式算法 定位评估 传感器网络 局部化
  • 简介:Thecapabilityandreliabilityarecrucialcharacteristicsofmobilerobotswhilenavigatingincomplexenvironments.Theserobotsareexpectedtoperformmanyusefultaskswhichcanimprovethequalityoflifegreatly.Robotlocalizationanddecisionmakingarethemostimportantcognitiveprocessesduringnavigation.However,mostofthesealgorithmsarenotefficientandarechallengingtaskswhilerobotsnavigatethroughcomplexenvironments.Inthispaper,weproposeabiologicallyinspiredmethodforrobotdecision-making,basedonrat’sbrainsignals.Rodentsaccuratelyandrapidlynavigateincomplexspacesbylocalizingthemselvesinreferencetothesurroundingenvironmentallandmarks.Firstly,weanalyzedtherats’strategieswhilenavigatinginthecomplexY-maze,recordedlocalfieldpotentials(LFPs),simultaneously.TherecordedLFPswereprocessedanddifferentfeatureswereextractedwhichwereusedastheinputintheartificialneuralnetwork(ANN)topredicttherat’sdecision-makingineachjunction.TheANNperformancewastestedinarealrobotandgoodperformanceisachieved.Theimplementationofourmethodonarealrobot,demonstratesitsabilitiestoimitatetherat’sdecision-makingandintegratetheinternalstateswithexternalsensors,inordertoperformreliablenavigationincomplexmaze.

  • 标签: Brain machine interface (BMI) DECISION-MAKING local
  • 简介:Functionalcharacterizationofeverysingleproteinisamajorchallengeofthepostgenomicera.Thelarge-scaleanalysisofacell'sproteins,proteomics,seekstoprovidetheseproteinswithreliableannotationsregardingtheirinteractionpartnersandfunctionsinthecellularmachinery.Animportantsteponthiswayistodeterminethesubcellularlocalizationofeachprotein.Eukaryoticcellsaredividedintosubcellularcompartments,ororganelles.Transportacrossthemembraneintotheorganellesisahighlyregulatedandcomplexcellularprocess.Predictingthesubcellularlocalizationbycomputationalmeanshasbeenanareaofvividactivityduringrecentyears.Thepubliclyavailablepredictionmethodsdiffermainlyinfouraspects:theunderlyingbiologicalmotivation,thecomputationalmethodused,localizationcoverage,andreliability,whichareofimportancetotheuser.Thisreviewprovidesashortdescriptionofthemaineventsintheproteinsortingprocessandanoverviewofthemostcommonlyusedmethodsinthisfield.

  • 标签: 蛋白质 细胞定位 预测方法 染色体组 蛋白质组
  • 简介:为识别的目的SWATH(小Waterplane区域双胞胎的赫尔)严厉有效地并且完善SWATH轮船鈥檚表演的察觉技术,这份报纸基于规模论述新奇双向图象登记策略和mosaicing技术不变的特征变换(筛)算法。建议方法能帮助我们观察与为分析SWATH的控制鳍的性能的一个大视觉角度严厉。筛是规模,旋转和照明的最有效的本地特征之一不变。然而,在这个算法有一些假火柴率。以在水下机器视觉,仅仅由获得一个精确火柴率罐头,我们发现一在水下机器人很快并且识别目标的地点。第一,因此,火柴比率原则的选择在这份报纸被提出;第二,双向登记算法的一些优点被分析单向性的匹配方法的特征结束。最后,一自动在水下图象拼接方法根据图象的固定尺寸,然后边被建议鈥檚重叠节被主要部件分析算法合并。试验性的结果完成更好的登记和光滑的mosaicing效果,证明建议方法是有效的。

  • 标签: 水下图像 SIFT 匹配率 本地化 SWATH船 小水线面双体船
  • 简介:AccordingtoareleaseconferenceondevelopmentofthermalpowerfluegasdesulphurizationequipmentheldbyChinaElectricityCouncil(CEC),theinstalledcapacityofthermalpowerunitswithdesulphurizationequipmentinoperationorunderconstructionreached53GWandover100GWrespectivelybytheendof2005.Atpresent,Chinahasgotacapabilityofcontracting(includingdesignandequipmentmanufacture)fluegasdesulphurizationprojectsforabout100-GWgeneratingunitsannually.

  • 标签: 脱硫装置 废气处理 脱硫率 热电设备
  • 简介:Wirelesssensornetworks(WSNs)consistofsensornodesthatbroadcastamessagewithinanetwork.Efficientbroadcastingisakeyrequirementinsensornetworksandhasbeenafocalpointofresearchoverthelastfewyears.Therearemanychallengingtasksinthenetwork,includingredundancycontrolandsensornodelocalizationthatmainlydependonbroadcasting.Inthispaper,weproposeabroadcastingalgorithmtocontrolredundancyandimprovelocalization(BACRIL)inWSNs.Theproposedalgorithmincorporatesthebenefitsofthegossipprotocolforoptimizingmessagebroadcastingwithinthenetwork.Simulationresultsshowacontrolledlevelofredundancy,whichisupto57.6%ifthenumberofsensornodesdeployedina500m500mareaareincreasedfrom50to500.

  • 标签: 无线传感器网络 广播算法 冗余控制 节点定位 受控 传感器节点