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粒子群优化算法的边界变异策略比较研究 摘要 粒子群优化算法是一种常用的全局优化算法。在算法中,边界变异策略可以有效地解决优化问题中变量值越过边界的问题。本文通过比较不同的边界变异策略的性能,揭示每种策略的优缺点。通过实验验证,边界收缩和边界翻转是两种较为有效的变异策略。 关键词:粒子群优化算法,边界变异策略,边界收缩,边界翻转 Abstract Particleswarmoptimizationalgorithmisacommonlyusedglobaloptimizationalgorithm.Inthealgorithm,theboundarymutationstrategycaneffectivelysolvetheproblemofvariablevaluescrossingtheboundaryintheoptimizationproblem.Thisarticlecomparestheperformanceofdifferentboundarymutationstrategiesandrevealstheadvantagesanddisadvantagesofeachstrategy.Throughexperiments,boundaryshrinkageandboundaryflippingareshowntobetwoeffectivemutationstrategies. Keywords:ParticleSwarmOptimizationAlgorithm,BoundaryMutationStrategy,BoundaryShrinkage,BoundaryFlipping Introduction Particleswarmoptimizationalgorithm(PSO)isapopularswarmintelligencealgorithmusedforglobaloptimizationproblems(EberhartandKennedy,1995).Thealgorithmisinspiredbythebehaviorofbirdsflockingorfishschooling,whereindividualsinagroupfolloweachothertomovetowardsacommongoal.Similarly,inPSO,aswarmofparticlesmovestowardsaglobaloptimumbyfollowingthepositionofthebestparticleintheswarm. PSOhasbeenwidelyusedinvariousfields,includingengineering,finance,andimageprocessing,duetoitssimplicityandefficiency.However,thealgorithmhassomelimitations,suchasprematureconvergenceandtheproblemofvariablevaluescrossingtheboundary.Prematureconvergenceoccurswhentheswarmconvergestoalocaloptimuminsteadoftheglobaloptimum.Theproblemofvariablevaluescrossingtheboundaryoccurswhenaparticlereachestheboundaryofthesearchspace,anditspositionbecomesoutofbounds. Tosolvetheproblemofvariablevaluescrossingtheboundary,variousboundarymutationstrategieshavebeenproposed.Thesestrategiesmodifythepositionofaparticlewhenitreachestheboundarytoensurethattheparticleremainswithinthesearchspace.Inthispaper,wecomparedifferentboundarymutationstrategiesandanalyzetheirperformance. BoundaryMutationStrategies Boundarymutationstrategiesmodifythepositionofaparticlewhenitreachesoneoftheboundariesofthesearchspace.Differentstrategies