学科分类
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15 个结果
  • 简介:Spatialcoherenceresonanceinatwo-dimensionalneuronalnetworkinducedbyadditiveGaussiancolourednoiseandparameterdiversityisstudied.WefocusontheabilityofadditiveGaussiancolourednoiseandparameterdiversitytoextractaparticularspatialfrequency(wavenumber)ofexcitatorywavesintheexcitablemediumofthisnetwork.Weshowthatthereexistsanintermediatenoiselevelofthecolourednoiseandaparticularvalueofdiversity,whereacharacteristicspatialfrequencyofthesystemcomesforth.Hereby,itisverifiedthatspatialcoherenceresonanceoccursinthestudiedmodel.Furthermore,weshowthattheoptimalnoiseintensityforspatialcoherenceresonancedecaysexponentiallywithrespecttothenoisecorrelationtime.Someexplanationsoftheobservednonlinearphenomenaarealsopresented.

  • 标签: 高斯有色噪声 相干共振 网络空间 神经网络 多样性 空间频率
  • 简介:为多看法录像编码的一个新奇颜色赔偿方法(MVC)被建议,它高效地与照相机的差异引起的颜色失配的存在利用在看法之间的会见相关性。一个颜色赔偿模型在红绿蓝隧道被开发然后为实际使用延长了到YCbCr隧道。一幅修改会见参考图画基于颜色赔偿模型被构造,它比原来的会见参考图画更类似于编码图画。而且,颜色赔偿因素能在编码器和解码器被导出,因此,没有另外的数据需要被传给解码器。试验性的结果证明建议方法改进MVC的编码效率并且维持好主观质量。

  • 标签: 多视频编码 色彩补偿 照相机 多样性
  • 简介:Inviewofthepoorwatersupplysystem'snetworkproperties,thesystem'scomplicatednetworkhydraulicequationswerereplacedbymacroscopicnodalpressuremodelandthemodelofrelationshipbetweensupplyflowandwatersourcehead.Byusingpump-stationpressureheadandinitialtankwaterlevelsasdecisionvariables,themodelofoptimalallocationofwatersupplybetweenpump-sourceswasdeveloped.Geneticalgorithmwasintroducedtodealwiththemodelofoptimalallocationofwatersupply.Methodsforhandlingeachconstraintconditionwereputforward,andovercometheshortcomingsuchasprematureconvergenceofgeneticalgorithm;asolvingmethodwasbroughtforwardinwhichgeneticalgorithmwascombinedwithsimulatedannealingtechnologyandself-adaptivecrossoverandmutationprobabilitieswereadopted.Anapplicationexampleshowedthefeasibilityofthisalgorithm.

  • 标签: 水供给系统 优化设计 遗传算法 网络控制 蓄水池
  • 简介:在这篇论文,由前面、向后的模型组成的一个数学模型在一个传播动力系统为差错诊断在平行基因算法(针网阵列)上被造。减少差错节的规模的一个新方法在前面的模型被开发,传递接口(MPI)途径的消息被全球单个人口的主人奴隶方法(GPGA)选基因算法到平行。建议途径被用于由28节,84个保护的继电器和40个电路断路器组成的一个样品系统。模拟结果证明新模型能在大规模动力系统的联机应用程序基于GPGA完成很快的计算。

  • 标签: 前后模式 故障诊断 GPGAs 并联接法
  • 简介:Inthispaper,anewzigzagmethodforplatestructuresandageneticalgorithm(GA)ofdynamicsourceseedspacesaredevelopedandacombinationofthemisusedtodealwithlargescalebuilt-upstructuraloptimization.ThenewGAcombinedwiththezigzagmethodcanworkefficientlywhencopingwithlargescalestructuraloptimizationincludeddisplacementandstressconstraints.ExamplesshowthatthisGAisrobustandcanbeusedformanycomplexstructuraloptimizationproblems.

  • 标签: OPTIMIZATION ZIGZAG method GAS
  • 简介:Tubinecascadeoptimumdesign,thetypicalnon-convexoptimalproblem,haslongbeenadesignchallengeintheengineeringfields.ThenewtypehybridGeneticAlgorithms-wholeannealingGeneticAlgorithmshavebeendevelopedinthispaper,Simulatedannealingselectionandnon-uniformmutationareadoptedinthewholeannealingGeneticAlgorithms.WholeannealingGeneticAlgorithmsoptimalperformancehavebeentestedthroughmathematicaltestfunctions.Onthisbasis,turbinecascadeinversedesignusingwholeannealingGeneticAlgorithmshaebeenpresented.TheB-Splinefunctionisappliedtorepresentthecascadeshape,C-typegridandGodunovschemeareadoptedtoanalysisthecascadeaerodynamicperformance.Theoptimalproblemaimstoobtainancascadeshapefromdifferentinitialcascadethroughthegiventargetpressuredistribution.Theoptimumcascadeshapeisinwellagreementwiththetargetcascadeshape.ThenumericalresultsshowthatthewholeannealingGeneticAlgorithmsarethepowerfuloptimumtoolsforturbineoptimumdesignorothercomplexengineeringdesignproblems.

  • 标签: 涡轮机 设计 遗传算法
  • 简介:怪物状态在1D数组被学习了,并且许多不同怪物状态用不同模型被发现了。研究最近被扩大了到2D数组,但是仅仅到他们的阶段模型。这里,我们把它递非局部的联合的影响上的神经原和焦点的2D数组的一个nonphase模型。用广泛的数字模拟,令人惊讶地,我们发现这个系统能显示出以前观察的怪物状态的大多数类型,与以前的模型相对照,在怪物状态的仅仅或一些类型能在每个模型被观察的地方。我们也发现这个模型能显示出象gridding那样的一些特殊像怪物的模式和multicolumn模式,它以前仅仅在阶段模型被观察。进一步,我们在场一条有效途径,即,移开联合的一些连接,产生异构的联合,它导致多样的像怪物的模式并且甚至从一个像怪物的模式导致转变到另外一个。

  • 标签: 神经元模型 局部耦合 二维阵列 嵌合体 体模 多样性
  • 简介:Anapproachforgeneratinginteractive3Dgraphicalvisualizationofthegeneticarchitecturesofcomplextraitsinmultipleenvironmentsisdescribed.3Dgraphicalvisualizationisutilizedformakingimprovementsontraditionalplotsinquan-titativetraitlocus(QTL)mappinganalysis.Interactive3DgraphicalvisualizationforabstractexpressionofQTL,epistasisandtheirenvironmentalinteractionsforexperimentalpopulationswasdevelopedinframeworkofuser-friendlysoftwareQTLNetwork(http://ibi.zju.edu.cn/software/qtlnetwork).Noveldefinitionofgraphicalmetasystemandcomputationofvirtualcoordinatesareusedtoachieveexplicitbutmeaningfulvisualization.Interactive3DgraphicalvisualizationforQTLanalysisprovidesgeneticistsandbreedersapowerfulandeasy-to-usetooltoanalyzeandpublishtheirresearchresults.

  • 标签: 遗传结构 数量性状基因座 三维图形可视化 复杂性状
  • 简介:Thealternatecombinationalapproachofgeneticalgorithmandneuralnetwork(AGANN)hasbeenpresentedtocorrectthesystematicerrorofthedensityfunctionaltheory(DFT)calculation.IttreatstheDFTasablackboxandmodelstheerrorthroughexternalstatisticalinformation.Asademonstration,theAGANNmethodhasbeenappliedinthecorrectionofthelatticeenergiesfromtheDFTcalculationfor72metalhalidesandhydrides.ThroughtheAGANNcorrection,themeanabsolutevalueoftherelativeerrorsofthecalculatedlatticeenergiestotheexperimentalvaluesdecreasesfrom4.93%to1.20%inthetestingset.Forcomparison,theneuralnetworkapproachreducesthemeanvalueto2.56%.Andforthecommoncombinationalapproachofgeneticalgorithmandneuralnetwork,thevaluedropsto2.15%.Themultiplelinearregressionmethodalmosthasnocorrectioneffecthere.

  • 标签: 神经网络方法 DFT计算 误差绝对值 遗传算法 密度函数理论 系统
  • 简介:Thebandgap,animportantcharacteristicoftheperiodicstructure,isdispersionrelated,whichcanbedesignedbytailoringthelayoutofmaterialswithintheperiodicmicrostructures.Atypicalexampleofaperiodicstructureisphononiccrystals(PnCs),whicharetraditionallyfabricatedfromtwo-phasematerials.Herein,weinvestigatethetopologiesofperiodicthree-phasePnCs.Themicrostructuresofthethree-phasePnCsareoptimizedusingatwo-stagegeneticalgorithm,andthreecasestudiesareproposedtoobtainthefollowing:(1)themaximumrelativebandgapwidth,(2)themaximumabsolutebandgapwidth,and(3)themax-imumbandgapataspecifiedfrequency.Moreimportantly,thethree-phasematerialprovidessignificantadvantagescomparedtothetypicaltwo-phasematerials,suchasalow-frequencybandgap.Thisresearchisexpectedtocontributehighlytovibrationandnoiseisolation,elasticwavefilters,andacousticdevices.

  • 标签: Phononic bandgap MATERIALS MULTIPHASE MICROSTRUCTURES TOPOLOGY
  • 简介:这篇论文由电压来源在高力量的感应电动机美联储为全部的泛音电流失真(THCD)的最小化论述基因算法(GA)的强大的应用转换ers,基于一个近似泛音模型。也就是说定义一个需要的基础输出电压,当最小化THCD时,最佳的脉搏模式(切换的角度)决心生产基本产量电压。在脉搏宽度调整(PWM)的开始的1/4个时期的三和五切换的片刻的二个盒子的完全的结果波形被介绍。在定子刺激的泛音的存在导致一个阿富汗辅币转矩部件。就如果阿富汗辅币转矩在低频率,他们能在反馈控制系统引起麻烦速度变化,柄疲劳,和不能令人满意的性能的事实而言,第5,第7,第11,并且第13当前的泛音(在五个切换的角度的情况中)在一些预先指定的价值被抑制,减轻低频率的泛音的有害效果。同时,当要求的基本产量电压被维持时,THCD被优化。

  • 标签: 感应发动机 遗传算法 优化 脉冲宽度调制