简介:Inviewofthepoorwatersupplysystem'snetworkproperties,thesystem'scomplicatednetworkhydraulicequationswerereplacedbymacroscopicnodalpressuremodelandthemodelofrelationshipbetweensupplyflowandwatersourcehead.Byusingpump-stationpressureheadandinitialtankwaterlevelsasdecisionvariables,themodelofoptimalallocationofwatersupplybetweenpump-sourceswasdeveloped.Geneticalgorithmwasintroducedtodealwiththemodelofoptimalallocationofwatersupply.Methodsforhandlingeachconstraintconditionwereputforward,andovercometheshortcomingsuchasprematureconvergenceofgeneticalgorithm;asolvingmethodwasbroughtforwardinwhichgeneticalgorithmwascombinedwithsimulatedannealingtechnologyandself-adaptivecrossoverandmutationprobabilitieswereadopted.Anapplicationexampleshowedthefeasibilityofthisalgorithm.
简介:Tubinecascadeoptimumdesign,thetypicalnon-convexoptimalproblem,haslongbeenadesignchallengeintheengineeringfields.ThenewtypehybridGeneticAlgorithms-wholeannealingGeneticAlgorithmshavebeendevelopedinthispaper,Simulatedannealingselectionandnon-uniformmutationareadoptedinthewholeannealingGeneticAlgorithms.WholeannealingGeneticAlgorithmsoptimalperformancehavebeentestedthroughmathematicaltestfunctions.Onthisbasis,turbinecascadeinversedesignusingwholeannealingGeneticAlgorithmshaebeenpresented.TheB-Splinefunctionisappliedtorepresentthecascadeshape,C-typegridandGodunovschemeareadoptedtoanalysisthecascadeaerodynamicperformance.Theoptimalproblemaimstoobtainancascadeshapefromdifferentinitialcascadethroughthegiventargetpressuredistribution.Theoptimumcascadeshapeisinwellagreementwiththetargetcascadeshape.ThenumericalresultsshowthatthewholeannealingGeneticAlgorithmsarethepowerfuloptimumtoolsforturbineoptimumdesignorothercomplexengineeringdesignproblems.
简介:Anapproachforgeneratinginteractive3Dgraphicalvisualizationofthegeneticarchitecturesofcomplextraitsinmultipleenvironmentsisdescribed.3Dgraphicalvisualizationisutilizedformakingimprovementsontraditionalplotsinquan-titativetraitlocus(QTL)mappinganalysis.Interactive3DgraphicalvisualizationforabstractexpressionofQTL,epistasisandtheirenvironmentalinteractionsforexperimentalpopulationswasdevelopedinframeworkofuser-friendlysoftwareQTLNetwork(http://ibi.zju.edu.cn/software/qtlnetwork).Noveldefinitionofgraphicalmetasystemandcomputationofvirtualcoordinatesareusedtoachieveexplicitbutmeaningfulvisualization.Interactive3DgraphicalvisualizationforQTLanalysisprovidesgeneticistsandbreedersapowerfulandeasy-to-usetooltoanalyzeandpublishtheirresearchresults.
简介:Thealternatecombinationalapproachofgeneticalgorithmandneuralnetwork(AGANN)hasbeenpresentedtocorrectthesystematicerrorofthedensityfunctionaltheory(DFT)calculation.IttreatstheDFTasablackboxandmodelstheerrorthroughexternalstatisticalinformation.Asademonstration,theAGANNmethodhasbeenappliedinthecorrectionofthelatticeenergiesfromtheDFTcalculationfor72metalhalidesandhydrides.ThroughtheAGANNcorrection,themeanabsolutevalueoftherelativeerrorsofthecalculatedlatticeenergiestotheexperimentalvaluesdecreasesfrom4.93%to1.20%inthetestingset.Forcomparison,theneuralnetworkapproachreducesthemeanvalueto2.56%.Andforthecommoncombinationalapproachofgeneticalgorithmandneuralnetwork,thevaluedropsto2.15%.Themultiplelinearregressionmethodalmosthasnocorrectioneffecthere.
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。