学科分类
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23 个结果
  • 简介:Anaudiorecoveringmethodofspread-spectrumhiddeninformationisproposedbasedongeneticalgorithm.Inthismethodtheembeddedsequencelengthisconfirmedfirstly,thenthebestestimatedsequencewiththeconfirmedlengthisgotbygeneticalgorithm,finallytheconfidentialmessagehiddeninstego-audiocanberecovered.Usingthisapproach,thehiddeninformationcanberecoveredwithoutanyinformationfromthetransmitter.ThepresentedmethodhasbeenimplementedonPC,andtheexperimentalresultsshowthattheaveragerecoveringcorrectrateishigherthan90%.

  • 标签: 隐藏信息 遗传算法 音频 恢复方法 MED 嵌入式
  • 简介:InCDMAmobilecommunicationsystems,multipleaccessinterferencecanbecanceledbymultiuserdetectiontechnique.TheDegradationbychannelfadingcanbereducedbydiversityreception.Thispaperinvestigatesafamilyofmultiuserreceiversthatcombineddecor-relatingdetection,antennadiversityandRAKEmultipathdiversity.Theperformanceofthemultiuserreceiversisanalyzed.Theresultsdemonstrateasignificantincreaseintheperformanceofthereceiversbyusingmultiuserdetectionanddiversityreception.

  • 标签: MULTIUSER detection DIVERSITY RECEPTION ASYNCHRONOUS CDMA
  • 简介:Thispaperpresentsanewhybridgeneticalgorithmforthevertexcoverproblemsinwhichscan-repairandlocalimprovementtechniquesareusedforlocaloptimization.Withthehybridapproach,geneticalgorithmsareusedtoperformglobalexplorationinapopulation,whileneighborhoodsearchmethodsareusedtoperformlocalexploitationaroundthechromosomes.Theexperimentalresultsindicatethathybridgeneticalgorithmscanobtainsolutionsofexcellentqualitytotheprobleminstanceswithdifferentsizes.Thepuregeneticalgorithmsareoutperformedbytheneighborhoodsearchheuristicsprocedurescombinedwithgeneticalgorithms.

  • 标签: 混合遗传算法 局部改善 NP完全问题 图论 顶点覆盖问题
  • 简介:WhiletheNetworkCodingcooperativerelaying(NC-relaying)hasthemeritofhighspectralefficiency,SuperpositionCodingrelaying(SC-relaying)hasthemeritofhighthroughput.Inthispaper,anovelconcept,codedcooperativerelaying,ispresented,whichisaunifiedschemeoftheNC-relayingandSC-relaying.FortheSC-relayingstrategywhichcanbeconsideredone-waycodedrelayingschemewithmulti-accesschannel,theclose-formsolutionoftheoutageprobabilitiesofthebasicsignalandadditionalsignalareobtainedfirstly.Secondly,theDiversity-and-MultiplexingTradeoff(DMT)characteristicsofbasicsignalandadditionalsignalareinvestigatedentirelyaswellastheoptimalclose-formsolutions.Thecomparednumericalanalysisshowstheevaluationerrorofthroughputbasedontheclose-formsolutionisabout0.15nats,whichiswithintheacceptableerrorrange.Duetothemutualeffectbetweenthebothsourcesignals,theavailablemaximalvaluesofthetwomultiplexinggainsarelessthan1.

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  • 简介:Wehaveanalyzedtheorder-disorderingvarianceduetoresonanceeffectandthenonlinearbehavioroffarinfraredraylaser(FIRL)-biologicalsysteminteraction.TheanalyticresultsshowthattheinteractionbetweenthelivingbiologicalsystemandFIRLcanproduceresonanceexcitationeffect,andsotheoriginalhighorderedstateofthesystemcanbedestroyedandthustheconformationvariationinthesystemcanbeproducedunderfurtheractionofthelaser.Inaddition,wehaveanalyzedthenonlinearpropertiesoftheFIRLbio-moleculeinteractionandexplainedthemutagenesiseffectsofFIRL.ThetheoreticanalysisisconsistentwiththeresultsofFIRLmutagenesisbreedingtest.

  • 标签: 遗传变异 红外射线 激光技术 生物系统 激励效果
  • 简介:Anovelalgorithm,theImmuneQuantum-inspiredGeneticAlgorithm(IQGA),isproposedbyintroducingimmuneconceptsandmethodsintoQuantum-inspiredGeneticAlgorithm(QGA).WiththeconditionofpreservingQGA'sadvantages,IQGAutilizesthecharacteristicsandknowledgeinthependingproblemsforrestrainingtherepeatedandineffectiveoperationsduringevolution,soastoimprovethealgorithmefficiency.TheexperimentalresultsoftheknapsackproblemshowthattheperformanceofIQGAissuperiortotheConventionalGeneticAlgorithm(CGA),theImmuneGeneticAlgorithm(IGA)andQGA.

  • 标签: 遗传算法 QGA 免疫算子 渐缩问题
  • 简介:Satelliteconstellationdesignforspaceopticalsystemsisessentiallyamultiple-objectiveoptimizationproblem.Inthiswork,totacklethischallenge,wefirstcategorizetheperformancemetricsofthespaceopticalsystembytakingintoaccountthesystemtasks(i.e.,targetdetectionandtracking).Wethenproposeanewnon-dominatedsortinggeneticalgorithm(NSGA)tomaximizethesystemsurveillanceperformance.Paretooptimalsetsareemployedtodealwiththeconflictsduetothepresenceofmultiplecostfunctions.Simulationresultsverifythevalidityandtheimprovedperformanceoftheproposedtechniqueoverbenchmarkmethods.

  • 标签: 空间光学系统 性能指标 星座设计 卫星 非支配排序遗传算法 多目标优化问题
  • 简介:Genomeassemblyisaprerequisitestepforanalyzingnextgenerationsequencingdataandalsofarfrombeingsolved.Manyassemblytoolshavebeenproposedandusedextensively.Majorityofthemaimtoassemblesequencingreadsintocontigs;however,wefocusontheassemblyofcontigsintoscaffoldsinthispaper.Thisiscalledscaffolding,whichestimatestherelativeorderofthecontigsaswellasthesizeofthegapsbetweenthesecontigs.Pheromonetrail-basedgeneticalgorithm(PGA)waspreviouslyproposedandhaddecentperformanceaccordingtotheirpaper.Fromourpreviousstudy,wefoundthatfamilycompetitionmechanismingeneticalgorithmisabletofurtherimprovetheresults.Therefore,weproposefamilycompetitionpheromonegeneticalgorithm(FCPGA)anddemonstratetheimprovementoverPGA.

  • 标签: 比较基因组 遗传算法 信息素 家庭 装配工具 竞争机制
  • 简介:特征选择是在文章分类的重要话题之一。然而,大多数存在特征选择方法连续、低效被用于巨大的文本数据集合。在这容易,一个特征选择方法基于平行合作进化基因算法被介绍。介绍方法使用基因算法选择特征子集并且利用平行合作进化提高时间效率,因此它能快速获得更代表性的特征子集。试验性的结果证明为精确性比率和召回比率,介绍方法比信息获得,x2统计,和相互的信息方法好;有仅仅一个中央处理器的介绍方法的消费时间低于这三个方法的,但是介绍方法在使用平行策略以后是优异的。

  • 标签: 协同进化遗传算法 并行策略 功能应用 特征选择 文本分类 时间效率
  • 简介:Thispaperaddressestheproblemofselectingarouteforeverypairofcommunicatingnodesinavirtualcircuitdatanetworkinordertominimizetheaveragedelayencounteredbymessages.TheproblemwaspreviouslymodeledasanetworkofM/M/1queues.Ageneticalgorithmtosolvethisproblemispresented.Extensivecomputationalresultsacrossavarietyofnetworksarereported.Theseresultsindicatethatthepresentedsolutionprocedureoutperformstheothermethodsintheliteratureandiseffectiveforawiderangeoftrafficloads.

  • 标签: ROUTE SELECTION VIRTUAL CIRCUIT data networks
  • 简介:Thisletterproposestwoalgorithms:anovelQuantumGeneticAlgorithm(QGA)basedontheimprovementofHan'sGeneticQuantumAlgorithm(GQA)andanewBlindSourceSeparation(BSS)methodbasedonQGAandIndependentComponentAnalysis(ICA).ThesimulationresultshowsthattheefficiencyofthenewBSSmethodisobviouslyhigherthanthatoftheConventionalGeneticAlgorithm(CGA).

  • 标签: 量子计算 遗传算法 量子遗传算法 独立组分 盲过程分离
  • 简介:这份报纸为3D模型的易碎的watermarking描述一个新奇算法。易碎的水--标记与变化的地点一起要求3D模型的甚至极小的故意的变化的察觉。自从在模型的所有顶点插入水位标的随机的数量将通常介绍可察觉的失真,这提出挑战。建议算法由使用基因算法在模型修改每个顶点地点以便没有可察觉的失真克服这挑战。各种各样的试验性的结果被用来认为基因算法设计参数的选择正当。试验性的结果也显示建议算法罐头精确地检测任何网孔修正的地点。

  • 标签: 遗传算法 三维模型 脆弱水印 位置变化 设计参数 检测网
  • 简介:Animprovedgeneticalgorithmforsearchingoptimalparametersinn-dimensionalspaceispresented,whichencodesmovementdirectionanddistanceandsearchesfromcoarsetoprecise.Thealgorithmcanrealizeglobaloptimizationandimprovethesearchefficiency,andcanbeappliedeffectivelyinindustrialoptimization,dataminingandpatternrecognition.

  • 标签: 遗传算法 数据收集 计算机集成制造系统
  • 简介:Agenetic-optimizationframeworkbasedonthepartialcooperationcommunicationprotocolisproposedforscalablevideocoding(SVC)streamtransmissionundermulti-relayamplifyandforwardcooperativenetworks.Unliketraditionalcooperativetransmissionschemes,thetransmissionmodeforeachcodedunitinthisnewprotocolcanbeswitchedflexiblybetweendirecttransmissionandcooperativetransmission.Obviously,underthisprotocol,thebandwidthefficiencyandtransmissionrobustnesscanbebalancedadaptivelyaccordingtotheprioritylevelofcodedunitsandwirelesschannelfadingcharacteristics.Basedonthis,awell-knowngeneticoptimizationalgorithm-differentialevolutionisexploitedheretofindthejointlyoptimaltransmissionmodes,powerallocationandunequalerrorprotection(UEP)channelcodingstrategiestominimizetheendtoendreconstructedvideodistortion.Extensivesimulationresultsshowthat,comparedwithclassicaloptimalcooperativeUEPtransmissionschemes,theproposedoptimizedtransmissionframeworkbasedonthepartialcooperativeprotocolcanbringsignificantpeak-signal-to-noise-ratio(PSNR)gainsforthereconstructedvideoinavarietyofchannelbandwidth,powerbudgetandtestsequences.

  • 标签: SCALABLE video coding PARTIAL COOPERATIVE communication
  • 简介:Code-DivisionMultiple-Access(CDMA)systemsareinterferencelimited,andthereforeefficientinterferencemanagementisnecessarytoenhancetheperformanceofaCDMAsystem.Inthispaper,asuccessivebeamforming(spatialfiltering),lineardecorrelatingMultiUserDetection(MUD,temporalfiltering)anddiversityreceptionstructureforuplinkmulticarrierDirectSequenceCDMA(DS-CDMA)systemwithantennaarrayareproposed.Bybeamforming,theantennaarraysuppressesinterferenceaccordingtothedistinctarraysignature.Subsequently,lineardecorrelatingMUDisap-pliedtoseparatethesignalsofdifferentusersandeliminateMultipleAccessInterference(MAI).Finally,thedecorrelatedsignalsatdifferentsubcarriersthatbelongtothesameuserarecombinedtoachievefrequencydiversity.SimulationresultsshowthattheproposedstructureofferssignificantBitErrorRate(BER)performanceimprovementbysuccessivelyexploitingthespace-time-frequencyprocessing.

  • 标签: 连续波形 多用户检测 天线 排列顺序
  • 简介:Theperformanceofdeeplearning(DL)networkshasbeenincreasedbyelaboratingthenetworkstructures.However,theDLnetowrkshavemanyparameters,whichhavealotofinfluenceontheperformanceofthenetwork.Weproposeageneticalgorithm(GA)baseddeepbeliefneuralnetwork(DBNN)methodforrobotobjectrecognitionandgraspingpurpose.ThismethodoptimizestheparametersoftheDBNNmethod,suchasthenumberofhiddenunits,thenumberofepochs,andthelearningrates,whichwouldreducetheerrorrateandthenetworktrainingtimeofobjectrecognition.Afterrecognizingobjects,therobotperformsthepick-andplaceoperations.Webuildadatabaseofsixobjectsforexperimentalpurpose.Experimentalresultsdemonstratethatourmethodoutperformsontheoptimizedrobotobjectrecognitionandgraspingtasks.

  • 标签: DEEP learning (DL) DEEP BELIEF NEURAL
  • 简介:Itissignificanttocombinemultipletasksintoanoptimalworkpackageindecision-makingofaircraftmaintenancetoreducecost,soacostratemodelofcombinatorialmaintenanceisanurgentneed.However,theoptimalcombinationundervariousconstraintsnotonlyinvolvesnumericalcalculationsbutalsoisanNP-hardcombinatorialproblem.Tosolvetheproblem,anadaptivegeneticalgorithmbasedonclustersearch,whichisdividedintotwophases,isputforward.Inthefirstphase,accordingtothedensity,allindividualscanbehomogeneouslyscatteredoverthewholesolutionspacethroughcrossoverandmutationandbetterindividualsarecollectedascandidateclustercentres.Inthesecondphase,thesearchisconfinedtotheneighbourhoodofsomeselectedpossiblesolutionstoaccuratelysolvewithclusterradiusdecreasingslowly,meanwhileallclusterscontinuouslymovetobetterregionsuntilallthepeaksinthequestionspaceissearched.Thisalgorithmcanefficientlysolvethecombinationproblem.Takingtheoptimizationondecision-makingofaircraftmaintenancebythealgorithmforanexample,maintenancewhichcombinesmultiplepartsortaskscansignificantlyenhanceeconomicbenefitwhenthehaltcostisratherhigh.

  • 标签: 自适应遗传算法 聚类搜索 优化决策 飞机维修 组合问题 维修成本
  • 简介:UnderstandingtheNatureofPredatoryPriciginLarge-ScaleMarketEconomywithGeneticAlgorithmsTXUnderstandingtheNatureofPredatoryPrici...

  • 标签: :Chainstore GAME PREDATORY PRICING EVOLUTIONARY GAME
  • 简介:一个修改基因算法(GA)被建议了,它在察觉到系统的伪静电干扰纤维栅栏习惯于波长解调。GA的修正方法被介绍了,相关数学模型被建立了。客观功能和与GA互连的单个健康评估策略也被建立。GA上的人口尺寸,染色体尺寸,代,转线路概率和变化概率的影响被分析了,并且修改GA的最佳的参数被获得了。模拟和实验,修改GA能被用于察觉到系统的伪静电干扰纤维栅栏的表演,和精确是的波长解调平等者到或不到3下午。CLC数字TN253

  • 标签: 准静态光纤 波长 遗传算法 调制技术
  • 简介:Aimingtoreducethecomputationalcostsandconvergetoglobaloptimum,anovelmethodisproposedtosolvetheoptimizationofacostfunctionintheestimationofdirectionofarrival(DOA).Inthismethod,ageneticalgorithm(GA)andfuzzydiscreteparticleswarmoptimization(FDPSO)areappliedtooptimizethedirectionofarrivalandpowerparametersofthemodesimultaneously.Firstly,theGAalgorithmisappliedtomakethesolutionfallintotheglobalsearching.Secondly,theFDPSOmethodisutilizedtonarrowdownthesearchfield.InFDPSO,achaoticfactorandacrossovermethodareaddedtospeeduptheconvergence.Thisapproachhasbeendemonstratedthroughsomecomputationalsimulations.ItisshownthattheproposedalgorithmcanestimateboththeDOAandthepowersaccurately.Itismoreefficientthansomepresentmethods,suchastheNewton-likealgorithm,Akaikeinformationcritical(AIC),particleswarmoptimization(PSO),andgeneticalgorithmwithparticleswarmoptimization(GA-PSO).

  • 标签: 离散粒子群优化 遗传算法 DOA 模糊 粒子群优化算法 估算