共查询到10条相似文献,搜索用时 15 毫秒
1.
《石油化工高等学校学报》2002,(4)
No .1(SumNo .5 1)EffectMechanismofNucleophilesonIBCarbocationicPolymerizationLIShu -xin ,GUOWen -li,ZHANGZhi-hong (1)………………………………………………………………………………………………EffectofN -ContainingNucleophilesonIBCarbocationicPolymerization(III) ———EffectofHexpyridineand theMechanismo… 相似文献
2.
《中南工业大学学报(英文版)》2001,(4)
MATERIALSSCIENCEANDENGINEERINGBiocompatibilityevaluationinvitro .Part 1:MorphologyexpressionandproliferationofhumanandratosteoblastsonthebiomaterialsRUANJian ming ,GRANTM .Helen(2 0 0 1,1,1)………………………………………………………MicrostructuralevolutionofTiAlbasealloyduringthree … 相似文献
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0 INTRODUCTIONItisfairlyeasytoachieveenrichnourishmentinareaswherewaterrunsveryslowly,suchaslake,reservoirs,apollutionformorecompositecontainingphosphorandnitrogen.FreshwaterinlakesandreservoirsinChinacomestoatotal6.261×1011m3,andaccountsfor23.2%ofthetotalamou… 相似文献
4.
InvestigationoftheDynamicCharacteristicsofaRotorBearingAssembly¥(刘庆明)(庞志成)LIUQingmingPANGZhicheng(Dept.ofMethanicalEngineerin... 相似文献
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0 INTRODUCTIONTheconstructionofundergroundnatural gasstorageisoneofthemostreasonableandeffectivewaysforbasicallysurmountingcityseasonalpeakshavingandstabilizingpeakwaving .Thenaturalgasissimplyinjectedintoundergroundstoragereservoirswhenmarketdemandfal… 相似文献
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0 INTRODUCTIONInthispaper ,westudytheellipticequations-diva(x ,un,Dun) =fn +gn.inD′(Ω)( 1)whereΩisaboundedopensubsetofRn.Therearealotofpapersontheconvergenceofsolutionsto ( 1) .BoccardoandMurat[1] studiedtheconvergenceofthegradientsofsolutionsto ( 1)understructurecond… 相似文献
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0 INTRODUCTIONTheproblemwasproposedin 2 0 0 0MathematicalContestinModeling (MCM )problemB .Basedonthestudyof 4colorproblem ,differentmodelsweredesigned .1 THEASSIGNMENTMODELEverytransmitter ,locatedatthecenterofeachhexagonwhoselengthissoveralargeplanar ,isassigne… 相似文献
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0 INTRODUCTIONConsiderthelineardelaydifferentialequation(DDE)oftheform :y′(t) =ay(t) +by(t- 1) ,t>0 ,y(t) =g(t) , - 1≤t≤ 0 ,a ,b∈R .(1)UsingLaplacetransformation ,weareledtothequasi polynomialcharacteristicequationassociatedwith (1)as ,λ=a+bexp(-λ) . (2 )Stabilitycriteriaforsystemsw… 相似文献
9.
《西华大学学报(自然科学版)》2001,(4)
SubiectsAuthor No .PagesOptimumDesignofaThree -PhaseFrequencyChangerWangJunLiYuanhui 1(3)………………………………DesignofaDualModemandItsDSPRealizationZhuLidongLiXiaofengWuShiqi 1(7)…………………………Studyon 8FSKDemodulationforALTModemZhangQuLiXiaofeng 1(13)…………………………………………ANew… 相似文献
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0 INTRODUCTIONTheintegratedCAD/CAPP/CAMsystemhasbeenwidelyusedinpracticewithsignificanteconomicgainsinconventionalmanufacturingfield.AlthoughafairlyhighlevelofautomationhasbeenachievedinElectricalDischargeMachining(EDM)equipment,thedesignofEDMproduction… 相似文献