简介：Thepaperdescribesatexture-basedfasttextlocationschemewhichoperatesdirectlyintheDiscreteWaveletTransform(DWT)domain.Bythedistinguishingtexturecharacteristicsencodedinwavelettransformdomain,thetextisfastdetectedfromcomplexbackgroundimagesstoredinthecompressedformatsuchasJPEG2000withoutfulldecompress.Comparedwithsometraditionalcharacterlocationmethods,theproposedschemehastheadvantagesoflowcomputationalcost,robusttosizeandfontofcharactersandhighaccuracy.Preliminaryexperimentalresultsshowthattheproposedschemeisefficientandeffective.

简介：ForTimeDifferenceOfArrival(TDOA)locationbasedonmulti-groundstationsscene,twodirectsolutionmethodsareproposedtosolvethetargetpositioninTDOAlocation.Therein,thesolvingmethodsarerealizedintherectangularandpolarcoordinates.Ontheconditionofrectangularcoordinates,firstofall,itsolvestheradialrangebetweenthetargetandreferencestation,thencal-culatesthelocationofthetarget.Inthecaseofpolarcoordinates,theazimuthbetweenthetargetandreferencestationissolvedfirst,thentheradialrangebetweenthetargetandreferencestationisfiguredout,finallythelocationofthetargetisobtained.Simultaneously,thesimulationandcomparisonanalysisaregivenindetail,andshowthatthepolarsolvingmethodhasthebetterfuzzyperformancethanthatofrectangularcoordinate.

简介：Usingthematrixapproach,weanalyzedtherelationbetweenthelocationofthetransmissioninstopbandandthephaseshift,anddiscussedtheproblemofvaryingthebandwidthofthetransmissionwindow.Thesetheoreticaltesultsinthispaperhaveimportantsignificanceforactualapplicationofthephase-shiftedfibergrating.

简介：这篇文章在认知收音机基于收到的信号力量介绍经典定位方法并且提出认知收到收音机的信号力量(CR-RSS)解决找到主要用户的第二等的用户的问题并且成功估计主要用户的地点和传播力量的本地化算法。通过认知收音机网络的建立，在CR-RSS途径评估第二等的用户，采样和环境因素的数字到结果。后果证明这个途径罐头有效地找到主要用户，在认知无线电的本地化的技术能帮助网络优化。

简介：SupportVectorMachine(SVM)isapowerfulmethodologyforsolvingproblemsinnon-linearclassification,functionestimationanddensityestimation,whichhasalsoledtomanyotherrecentdevelopmentsinkernelbasedmethodsingeneral.Thispaperpresentsahighaccuracyandfault-tolerantSVMforthemobilegeo-locationproblem,whichisanimportantcomponentofpervasivecomputing.Simulationresultsshowitsbasiclocationperformance,andillustrateimpactsofthenumberoftrainingsamplesandtrainingareaontestlocationerror.

简介：Withtheemergenceoflocation-basedapplicationsinvariousfields,thehigheraccuracyofpositioningisdemanded.Byutilizingthetimedifferencesofarrival(TDOAs)andgainratiosofarrival(GROAs),anefficientalgorithmforestimatingthepositionisproposed,whichexploitstheBroyden-Fletcher-Goldfarb-Shanno(BFGS)quasi-Newtonmethodtosolvenonlinearequationsatthesourcelocationundertheadditivemeasurementerror.Althoughtheaccuracyoftwo-stepweighted-least-square(WLS)methodbasedonTDOAsandGROAsisveryhigh,thismethodhasahighcomputationalcomplexity.Whiletheproposedapproachcanachievethesameaccuracyandbiaswiththelowercomputationalcomplexitywhenthesignal-to-noiseratio(SNR)ishigh,especiallyitcanachievebetteraccuracyandsmallerbiasatalowerSNR.Theproposedalgorithmcanbeappliedtotheactualenvironmentduetoitsreal-timepropertyandgoodrobustperformance.Simulationresultsshowthatwithagoodinitialguesstobeginwith,theproposedestimatorconvergestothetruesolutionandachievestheCramer-Raolowerbound(CRLB)accuracyforbothnear-fieldandfar-fieldsources.

简介：这份报纸基于距离几何学(DG)建议了一个新奇无线地点算法在信号的到达(TOA)的时间过滤的限制(也就是作为DG-TOA)。观察数据过滤并且处理并且基于DG-TOA算法导致数学公式被用于地点，也玩关键规则。模拟结果证明建议DG-TOA算法能提供更多的有效观察数据并且比的更精确最不方形的估计(LSE)算法在稠密，多线路，有变化评价错误的室内的情形。

简介：CausedbyNon-Line-Of-Sight(NLOS)propagationeffect,thenon-symmetriccontaminationofmeasuredTimeOfArrival(TOA)dataleadstohighinaccuraciesoftheconventionalTOAbasedmobilelocationtechniques.RobustpositionestimationmethodbasedonbootstrappingM-estimationandHuberestimatorareproposedtomitigatetheeffectsofNLOSpropagationonthelocationerror.SimulationresultsshowtheimprovementovertraditionalLeast-Square(LS)algorithmonlocationaccuracyunderdifferentchannelenvironments.

简介：Theclosephotogrammetric3-Dcoordinatemeasurementisanewmeasuringtechnologyinthefieldsofthecoordinatemeasurementmachine(CMM)inrecentyears.Inthismethod,weusuallyplacesometargetsonthemeasuredobjectandtakeimageoftargetstodeterminetheobjectcoordinate.Thesubpixellocationoftargetimageplaysanimportantroleinhighaccuracy3-Dcoordinatemeasuringprocedure.Inthispaper,somesubpixellocationmethodsarereviewedandsomefactorswhichaffectlocationprecisionareanalyzed.Thenweproposebilinearinterpolationcentroidalgorithm.Theexperimentshaveshownthisalgorithmcanimproveaccuracyoftargetcentroidbyincreasingavailablepixels.

简介：Duringthelastdecade,spatio-temporaldatabaseshavebecomeincreasinglyimportantinmanyapplicationssuchasgeographicinformationsystems(GIS)andengineeringinformationsystems.Thispaperdiscussesthedesignandimplementationofageocomputingplatformforthedevelopmentoflocation-basedservices(LBS)focusingonmobilemapping.Duringtheanalysis,design,andimplementationofthegeocomputingplatform,aneffectivemethodisproposedforthereal-timeprocessingofgeographicinformationacquiredbyacameraattachedtoapersonaldigitalassistant(PDA).Thismethodcombineslocationinformationgivenbytheglobalpositionsystem(GPS)withman’sabilitytorecognizethelocationofobjectsandtheirgeographicalrelationshiptoimproveobjectmapping.

简介：Timeefficiencyofkeyestablishmentandupdateisoneofthemajorproblemscontributorykeymanagementsstrivetoaddress.Toachievebettertimeefficiencyinkeyestablishment,weproposeaLocation-basedHuffman(L-Huffman)scheme.First,usersareseparatedintoseveralsmallgroupstominimizecommunicationcostwhentheyaredistributedoverlargenetworks.Second,bothuser'scomputationdifferenceandmessagetransmissiondelayaretakenintoconsiderationwhenHuffmancodingisemployedtoformingtheoptimalkeytree.Third,thecombinedweightsinHuffmantreearelocatedinahigherplaceofthekeytreetoreducethevarianceoftheaveragekeygenerationtimeandminimizethelongestkeygenerationtime.SimulationsdemonstratethatL-HuffmanhasmuchbetterperformanceinwideareanetworksandisalittlebetterinlocalareanetworkthanHuffmanscheme.

简介：Quality-of-Service(QoS)描述万维网服务的非功能的特征。因此，QoS是在服务选择，作文和容错的一个批评参数，并且必须被QoS预言方法的某类型精确地决定。随万维网服务的数字的戏剧的增加，然而，数据稀疏引起的预言失败成为了批评挑战。新‘hybriduser-location-aware预言基于加权的Adamic-Adar(WAA)’(HUWAA)被建议。含蓄的邻居搜索被合并地点因素优化。同时，改进算法的能力在公共真实世界数据集的实验被验证解决数据稀少问题。新算法超过基于条款的pearson关联系数(IPCC)存在，基于用户的pearson关联系数(UPCC)和万维网服务recommender系统(WSRec)算法。

简介：超声(美国)挥动察觉和声学的排出物(AE)线性地点系统被建议，它作为美国波浪传感器采用纤维布拉格栅栏(FBG)。在理论分析，对纵的美国波浪的FBG传感器反应被调查。当栅栏长度比美国波长短得多时，结果显示FBG波长能作为静态的大小写被调制。标准正弦曲线和锭子波浪测试的试验性的结果与产生信号同意很好。为认识到线性地点也被完成用二FBG推进研究。最大的线性地点错误作为不到5公里被获得。基于FBG的美国波浪传感器和AE线性地点为特定的要求提供有用工具。

简介：Thispaperproposesaneffectivemethodoffaultlocationbasedonabinarytreeforopticalburstswitching(OBS)network.Tominimizethemonitoringcost,wedividethenetworkintoseveralmonitordomainsbyintroducingmonitoring-cyclealgorithms.Inordertogenerateanexclusivecode,wemodifythemonitoringcyclealgorithmwhentwonodeshavethesamecode.Throughthebinarytreealgorithm,apre-computationoffaultsintheOBSnetworkcanbeachieved.Whenafaulthappens,wecanlocateitimmediatelyandaccurately.Exampleshaveprovedthatthealgorithmhasgeneralapplicability.

简介：按需的路由协议广泛地在活动特定的网络(MANET)被使用。泛滥是在按需的路由协议发现的路由的一个重要传播计划。然而，在高密度的MANET冗余性，泛滥的包导致电话广播了暴风雨问题(BSP)的表演的戏剧的恶化。为在MANET的路由的一个帮助地点的概率的广播(LAPB)算法被建议减少大量涌入这份报纸生产的路由包的数字。以便减少冗余性包，仅仅在一个特定的区域的节点有概率，由地点信息和邻居知识计算了，宣传路由包。模拟结果证明LAPB算法能在路由发现阶段减少包和发现延期(DD)。

简介：Theoptimalestimationperformanceoftargetparametersisstudied.First,thegeneralformofCramer-Raobound(CRB)forjointestimationoftargetlocationandvelocityisderivedforcoherentmultipleinputmultipleoutput(MIMO)radars.TogainsomeinsightintothebehavioroftheCRB,theCRBwithasetofgivenorthogonalwaveformsisstudiedasaspecificcase.Second,amaximumlikelihood(ML)estimationalgorithmisproposed.Themeansquareerror(MSE)oftheMLestimationoftargetlocationandvelocityisobtainedbyMonteCarlosimulationanditapproachesCRBinthehighsignal-to-noiseratio(SNR)region.

简介：Low-duty-cyclemechanismscanreducetheenergyconsumptionsignificantlyinwirelesssensornetworks(WSNs).Sensorsstaydormantmostofthetimetosavetheirenergyandwakeupbasedontheirneeds.However,suchatechnique,whileprolongingthenetworklifetime,setsexcessivechallengesforreducingtheend-to-end(E2E)delaywithinthenetwork.Inthispaper,thecentralizedcluster-basedlocationfinding(CCLF)algorithmisproposedtoreducethehighlatencyinlow-duty-cycleWSNsbyfindingasuitablepositionforthesink.Thealgorithmismainlycomposedofthreesteps:a)theclusterconstruction,b)thefastlook-uptable(FLU-table)construction,andc)thesinklocationdecision.ThesimulationresultsshowthattheperformanceoftheCCLFalgorithmissignificantlysimilartothatoftheoptimalalgorithm.Moreover,theCCLFalgorithmrequireslessoperationtimecomparedwiththeoptimalalgorithm.