学科分类
/ 1
8 个结果
  • 简介:Visualfiredetectiontechnologiescandetectfireandalarmwarningsearlierthanconventionalfiredetectors.Thisstudyproposesaneffectivevisualfiredetectionmethodthatcombinesthestatisticalfirecolormodelandsequentialpatternminingtechnologytodetectfireinanimage.Furthermore,theproposedmethodalsosupportsreal-timefiredetectionbyintegratingadaptivebackgroundsubtractiontechnologies.Experimentalresultsshowthattheproposedmethodcaneffectivelydetectfireintestimagesandvideos.ThedetectionaccuracyoftheproposedhybridmethodisbetterthanthatofCelik’smethod.

  • 标签: 火灾探测技术 序列模式 视觉 检测图像 火灾探测器 探测方法
  • 简介:为综合的一个可行方法毫米波浪圆锥形的数组并且优化低跨极化是从远地的重叠原则的proposed.Starting,包括相互的联合和装的站台完成的元素的一条有效途径被用来计算远地的patterns.A坐标变换被使用创造极化数量,并且为元素的一个一般过程极化了模式转变是数字例子被给的performed.Corresponding和需要的sidelo

  • 标签: 优化模式 极化合成 锥形 交叉极化 远场模式 数值结果
  • 简介:Torealizetheon-linemeasurementandmakeanalysisonthedensityofalgaeandtheirclusterdistribution,thefluorescentdetectionandfuzzypatternrecognitiontechniquesareused.Theprincipleoffluorescentfiber-opticdetectionisgivenaswellasthemethodoffuzzyfeatureextractionusingaclassofneuralnetwork.

  • 标签: 海藻 赤潮 海洋污染 发光光纤检波 模糊模式识别
  • 简介:Fieldcomputation,anemergingcomputationtechnique,hasinspiredpassionofintelligencescienceresearch.Anovelfieldcomputationmodelbasedonthemagneticfieldtheoryisconstructed.Theproposedmagneticfieldcomputation(MFC)modelconsistsofafieldsimulator,anon-derivativeoptimizationalgorithmandanauxiliarydataprocessingunit.ThemathematicalmodelisdeducedandprovedthattheMFCmodelisequivalenttoaquadraticdiscriminantfunction.Furthermore,thefiniteelementprototypeisderived,andthesimulatorisdeveloped,combiningwithparticleswarmoptimizerforthefieldconfiguration.Twobenchmarkclassificationexperimentsarestudiedinthenumericalexperiment,andonenotableadvantageisdemonstratedthatlesstrainingsamplesarerequiredandabettergeneralizationcanbeachieved.

  • 标签: 计算模型 磁场理论 模式分类 数据处理单元 二次判别函数 粒子群优化
  • 简介:Inordertorealizethemodulardesignofthemicrogrid,thispaperproposedanewmodulartopologyfortheAC-DCmixedmicrogrid.Inthattopology,theACmicrogridunitandtheDCmicrogridunitwerepackagedtogetherbytheback-to-backconverter.Thebattery-supercapacitorhybridenergystoragesystemwasconnectedtotheDCbusofback-to-backconverter.Bythereasonabledesignonthebattery-supercapacitorhybridsystem,theenergystoragesystemcouldsupplytherapidpowerandenergysupportforthemicrogridspontaneously.Themathematicalmodelandthecontrolalgorithmofthatmicrogridtopologywerestudied.Bythesimulationanalysis,itcanbeconcludedthatAC-DCmixedmodularmicrogridtopologycouldoperatesteadilyonboththegrid-connectedmodeandtheisolatedmode.Furthermore,wecanconcludebythesimulationthatthedesignedmodularmicrogridcouldoperateuninterruptedwhenthemicrogridtopologyswitchedfromthegrid-connectedmodetotheisolatedmode.Theseamlessswitchingbecamethenaturalpropertyforthemodularmicrogrid.Asaresult,themodularmicrogridtopologycanbeconsideredasausualpower/loadmoduletorealizethefriendlypowerinteractionwiththepowergrid.

  • 标签: MICROGRID TOPOLOGY energy storage mode switching operation mode
  • 简介:OptimizationofantennaarraypatternusedinaspaceborneSyntheticApertureRadar(SAR)systemisconsideredinthisstudy.Arobustevolutionaryalgorithm,Non-dominatedSortingGeneticAlgorithms(theimprovedNSGA-Ⅱ),isappliedonaspaceborneSARantennapatterndesign.Thesystemconsistsoftwoobjectivefunctionswithtwoconstraints.Paretofrontsaregeneratedasaresultofmulti-objectiveoptimization.AfterbeingvalidatedbyatestproblemZDT4,thealgorithmsareusedtosynthesizespaceborneSARantennaradiationpattern.ThegoodresultswithlowAmbi-guity-to-SignalRatio(ASR)andhighdirectivityareobtainedinthepaper.

  • 标签: 非支配排序遗传算法 星载SAR 天线方向图 优化使用 星载合成孔径雷达 系统模式
  • 简介:Thebacktrackingsearchoptimizationalgorithm(BSA)isoneofthemostrecentlyproposedpopulation-basedevolutionaryalgorithmsforglobaloptimization.Duetoitsmemoryabilityandsimplestructure,BSAhaspowerfulcapabilitytofindglobaloptimalsolutions.However,thealgorithmisstillinsufficientinbalancingtheexplorationandtheexploitation.Therefore,animprovedadaptivebacktrackingsearchoptimizationalgorithmcombinedwithmodifiedHooke-Jeevespatternsearchisproposedfornumericalglobaloptimization.Ithastwomainparts:theBSAisusedfortheexplorationphaseandthemodifiedpatternsearchmethodcompletestheexploitationphase.Inparticular,asimplebuteffectivestrategyofadaptingoneofBSA’simportantcontrolparametersisintroduced.TheproposedalgorithmiscomparedwithstandardBSA,threestate-of-the-artevolutionaryalgorithmsandthreesuperioralgorithmsinIEEECongressonEvolutionaryComputation2014(IEEECEC2014)oversixwidely-usedbenchmarksand22real-parametersingleobjectivenumericaloptimizationbenchmarksinIEEECEC2014.Theresultsofexperimentandstatisticalanalysisdemonstratetheeffectivenessandefficiencyoftheproposedalgorithm.

  • 标签: 优化算法 回溯搜索 自适应 模式搜索法 IEEE 全局优化
  • 简介:Ahybridmethodforsynthesizingantenna’sthreedimensional(3D)patternisproposedtoobtainthelowsidelobefeatureoftruncatedconeconformalphasedarrays.Inthismethod,theelementsoftruncatedconeconformalphasedarraysareprojectedtothetangentplaneinonegeneratrixofthetruncatedcone.Thentwodimensional(2D)Chebyshevamplitudedistributionoptimizationisrespectivelyusedintwomutualverticaldirectionsofthetangentplane.Accordingtothelocationoftheelements,theexcitationcurrentamplitudedistributionofeachelementontheconformalstructureisderivedreversely,thentheexcitationcurrentamplitudeisfurtheroptimizedbyusingthegeneticalgorithm(GA).Atruncatedconeproblemwith8×8elementsonit,anda3Dpatterndesiredsidelobelevel(SLL)upto35dB,isstudied.Byusingthehybridmethod,theoptimalgoalisaccomplishedwithacceptableCPUtime,whichindicatesthatthishybridmethodforthelowsidelobesynthesisisfeasible.

  • 标签: 相控阵列 遗传算法 投影法 低旁瓣 方向图综合 共形