基于知识的约束圆和矩形正交packing问题的智能搜索算法分析

基于知识的约束圆和矩形正交packing问题的智能搜索算法分析

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时间:2019-03-02

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1、AbstractPackingproblems(layoutdesignproblem)derivefrommanyengineeringdesignareas,suchas:printedcircuitboard(PCB)design,thesatellitemodulelayoutdesign,slabdesignandmatchingsurplusslabforironandsteelcompanies,platecuttinginprocessingindustry,andsoon.Fortheproblemsinthispaper,itisrequi

2、redtouseassmallspaceaspossibletopackallobjects,ortopackasmoreobjectsaspossibleinthecontainerwhilesatisfyinggivenperformanceconstraints.BecauseoftheNPhardnature,theyhavebeenwidelyresearchedbyscholars.Theexistingalgorithmstosolvetheaboveproblemsmainlyincludethefollowingthreetypes:heur

3、isticalgorithms,evolutionaryalgorithmsandhybridalgorithms.Theheuristicalgorithmshavehighercomputationaleffciency,buttheyarewithoutglobalsearchablity.Forevolutionaryalgorithms,theirsituationisjustthereverse.So,scholarshavebeenstudyingthehybridalgorithmwhichconsistsoftheheuristicalgor

4、ithmwiththeevolutionaryalgorithmforalongtime.Butcruuently,itisalackofpowersolutionapproachesfortheproblemsinthispaper.Therefore,withthesupportoftheNationalScienceandTechnologySupportProject(No.2012-BAF10B04),andtheNationalNaturalScienceFoundationofChina(No.61272294),oursubjectgroups

5、tudiesonthelayoutdesignproblemofthesatellitemodule,twoproblemsoftheslabdesignandsurplusslab-matchingforironandsteelcompanies.Transformingthemintorectanglepackingproblem,circleandrectanglepackingproblemwithconstraintsforsolving,weobtainmanyachievements,whosecomputationalefficiency,so

6、lutionprecisionandstabilityarehigherthanthoseofexistingalgorithms.Themainworksofthispaperincludethreeaspects:(1)Fororthogonalrectanglepackingproblemwithconstraints,afastheuristicantcolonyalgorithmisproposed.Itsheuristicconstructionofthefeasiblesolutionisthattheroulettewheelselection

7、isusedinordering,andtheoverlap-allowedfieldsgeneratedbygivenrulesareusedinquicklypositioningretangles.Thenumericalexperimentalresultsshowthattheperformanceoftheproposedalgorithmissuperiortothoseofexistingalgorithms.(2)Forthecircleandorthogonalrectanglepackingproblemwithconstraints,t

8、hispaperputsforward

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