共查询到10条相似文献,搜索用时 46 毫秒
1.
利用Rabinowitz鞍点定理及Ambrosetti-Rabinowitz山路经理以及它们相应的临界点的Morse指标估计证明了二类非自治Hamilton系统给定极小周期的次调和解的存在性。 相似文献
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0 INTRODUCTIONTextresults[1] haveshownthatusingthehydraulicdampersystemtocontroltheseismicresponsesofthestructurewithspaciousfirststoryisveryeffective .Inthispaper ,ananalysismodelofStructure HDSisestablished .Itsettlesafoundationformoreresearchesofthisstr… 相似文献
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Cyclopropylamineisanimportantintermediateforsynthesisofantibioticmedicinessuchasciprofloxacin,profloxacin,sparfloxacin,etc.,andisusedtopreparefinechemicals.Thoughsomeresearchersstudiedthesynthesisofcyclopropylamine,thismethodisnotsuitableforlargescalepr… 相似文献
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Leadfluoridecrystalexistsintwoforms:cubicphase(βPbF2)andorthorhombicphase(αPbF2).Usually,asgrownPbF2samplespossesscubicsymmetry.SinceDallyandHofstadterdiscoveredthatPbF2crystalcouldbeusedasCherenkovradiatorin1968[1],moreandmoreresearchershavepaidattentiontothe… 相似文献
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Using genetic algorithm to learn neural network identifier for modeling gyro startup drift rate 总被引:1,自引:0,他引:1
0 INTRODUCTIONGyroisthekeypartofaninertialnavigationsystem .Tosomegyros ,theirthermalbalanceprocesscoststoomuchtimetomeettheneedofinstantstartup .Soestab lishingstartuptemperaturemodels ,withwhichcompensatetemperaturedriftrateisaneffectivewaytoimplementin… 相似文献
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雷家珩 《武汉理工大学学报(材料科学英文版)》2002,17(3)
1 IntroductionNormalspinelLiMn2 O4 possessesspecificmemoryeffectforlithiumion .Manganeseisrichinnaturalre sourcesandhasnopollutiontotheenvironment .Extrac tionofmicro lithiumfromseawaterandsalt lakebrinebylithiummanganeseoxideisregardedasthemostprospec tive… 相似文献
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H∞controltheoryhasmadesignificantadvancementforbothlinearandnonlinearsystems.ThesolvabilityconditionsfornonlinearsystemswerepresentedintermsofHamiltonJaccobiequations(HJE)orinequalities(HJI)[1,2].However,theseHJEsorHJIsaredifficulttosolvegenerally.Thus,agre… 相似文献
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戴红莲 《武汉理工大学学报(材料科学英文版)》2002,17(3)
1 IntroductionCalciumphosphatematerialsaresimilarincomposi tionsandstructuretobonemineralsandhavegoodbio compatibilityandosteoconducitivityasbonereplacementandaugmentations[1] .Atpresent,calciumphosphatearti ficialbonematerialsaremainlyceramicsandglasses ,… 相似文献
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TheFIMmicrographsofbinaryorderedintermetalliccompoundsarecomparablewiththoseofpuremetals,whichhaveperfectringstructure.Andinterestingenough,generallyonlyoneatomspeciescontributestotheimages[1,2].However,itisnotclearwhichatomspeciesimagesinmostsystems,andd… 相似文献
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0 INTRODUCTIONDetectingobstaclesfromamobilerobotisoneofthekeyissuestothesuccessfulapplicationofthemobilero bot .Thisproblemhasattractedalotofresearchersovertheyears .Theyhaveproposedawidevarietyofapproach esandalgorithms .Butdetectingmovingobstaclesfroma… 相似文献