共查询到20条相似文献,搜索用时 15 毫秒
1.
方漪 《中国科学E辑(英文版)》1998,41(6):661-665
Inplastictheory,manystrictandperfectresultsontheresearchofthesliplinetheoryofplanestrainareobtained.However,thesliplineconceptsandresultsintheplanestrainproblemarenotdirectlyappliedtotheplanestressproblemorothers.Intheplanestrainproblem,theslipline,defi… 相似文献
2.
Lai Xuzhi Cai Zixing 《中南工业大学学报(英文版)》1999,6(2):134-137
Theacrobotisagoodexampleofunderactuatedmechanicalsystem,whichpossessesfeweractuatorsthandegreesoffreedom[1].Becauseofthecomplexityoftheirnonlineardynamicsandtheirnonholonomicbehavior,controlofthissystemisverydifficult[2,3].Theacrobotconsideredinthi… 相似文献
3.
GerardinandMichelobservedtheionnitridedlayerofpureironwithTEM[1].Theresultsshowedthatthereareonlytwins,sowhethertherearedislocationsandwhatistheirconfigurationarenotquiteclear.Theauthorshavefoundthattherearevacanciesinionnitridedlayers[2],buttheproofofato… 相似文献
4.
Simulation of water quantity exchange between groundwater and the Platte River water, central Nebraska 总被引:1,自引:0,他引:1
束龙仓 《中南工业大学学报(英文版)》2002,9(3):212-215
1 INTRODUCTIONCompetitionforwaterresourcesinriverval leysintheHighPlainsstatesoftenresultsincon flictsbetweenstatesandamongdiffer 相似文献
5.
Inthequalitativetheoryofrealplanardifferentialautonomoussystems,examplesandreseachresultsaboutlimitcyclesurroundingacomplexcriticalpointareseldomfound[1,2].Usingtheintersectionnumberofalgebraiccurve,Liu[3]denotesthemultiplicityofcomplexcriticalpointandpro… 相似文献
6.
0 INTRODUCTIONArcweldingprocessplayanimportantroleinthemoderntechnologytojointhemetalplates .Itisimportanttorealizeintelligentweldingrobotsoastoobtainagoodqualityofweldingresults .Theseam trackingsystemisanimportantpartoftheweldingrobot .Manyseam trackin… 相似文献
7.
巫辉 《武汉理工大学学报(材料科学英文版)》2002,(4)
1 IntroductionThetraditionalsol gelmethodandco precipitationprocess,whichareeasytocauseexcsolutionandsegrega tionwhenheating ,arenotalwayseffectiveonmaintainingahomogenousdistributionofprecursor .Asaresult,unde sirablephasesformduringtheprocessofcalcinati… 相似文献
8.
0 INTRODUCTIONInhydrauliccontrolsystem ,inordertoimprovethecontrolperformance ,controlmethodofthebestoptimiza tion ,theintelligentPIDregulator,thestatenegativefeed backcontrolmethodandsoonaregenerallyused .Thesecontrolmethodscangiveresultsatisfactorilytoce… 相似文献
9.
Irina U.Kulinich 《哈尔滨工业大学学报(英文版)》2000,(Z1)
0 INTRODUCTIONThemainqualityofspatialenvironmentofcitiesin cludingandnatural ,andantropogeneouselements ,areitchanging ,theabilitytoaccumulatebothpositivepoten tial ,andnegativeconsequencesofhumanactivity .Thisconsequencesinvariableresultsinqualitativetran… 相似文献
10.
Coaldustwettingbehaviorandotherpropertiesinnonionicsurfactantsolutionhavebeeninvestigatedbymanyresearchers[1~ 4 ] .However,theseresearchresultsarenotfullysuitablefordescribingthecharacteristicsinthespraysystemofdustabatementbyusingwettingagentliquid ,beca… 相似文献
11.
Diamondsynthesisisanallotropictransfor mationprocess,wheregraphiteistransformedintodiamondathightemperatureandpressurebycatalysisandthelastoutputofdiamondsinglecrystals,particlesizeandstrength (allnamedsynthesizingresult)arecontrollednotonlybythecha rac… 相似文献
12.
0 INTRODUCTIONThemoderntheoryofageomagneticfieldassumes ,thatinaliquidcoreoftheEarththereisacontinuousmovingofsubstance[1] .Nowdoesnotcausedoubts ,thatthermalconvectioninaterrestrialcoreisjustthatreason ,whichresultsincreationofageomagneticfield[2 ] .Thetheor… 相似文献
13.
1 INTRODUCTIONThechiralnatureoflivingsystemshasev identimplicationsonbiologicallyactivecom poundsinteractingwiththem .Onamolecularlevel,chiralityrepresentsanintrinsicpropertyofbuildingsubstancesoflife ,suchasaminoacidsandsugaretc.Asaresult,thedifferentena… 相似文献
14.
1 INTRODUCTIONTheestimationofconvergencevelocityand parameterizationof geneticalgorithms(GA)aretwoimportanttheoreticproblems,buttherearefewstricttheoreticresults[1] .T .B ck[2 ,3] obtainedtheestimationofconver gencevelocityofsimplifiedGAbyapplyingor derstatisti… 相似文献
15.
0 INTRODUCTIONAnalysisandoptimizationofstructuresusedforCADofstructuresareadvancedmethodsforstructuralengineer ingdesign .Structuraloptimizationisusuallybasedonstructuralanalysis ,therefore ,exactanalyticalresultshavegreatsignificancetooptimizationofstru… 相似文献
16.
敬承斌 《武汉理工大学学报(材料科学英文版)》2002,17(4)
1 IntroductionThetheoryofhollowwaveguidefortransmittingCO2laserisbasedontheanomalousdispersioncausedbyreso nanceabsorptionatthewavenumberof 94 0cm- 1[1- 3 ] .However ,theIRabsorptionofthesilicaglassmainlytakesplaceatwavelengthsbetween 7.6 9and 9.6 2 μm ,asaresult,almos… 相似文献
17.
0 INTRODUCTIONTextresults[1] haveshownthatusingthehydraulicdampersystemtocontroltheseismicresponsesofthestructurewithspaciousfirststoryisveryeffective .Inthispaper ,ananalysismodelofStructure HDSisestablished .Itsettlesafoundationformoreresearchesofthisstr… 相似文献
18.
Finelinnaeite ,usuallywithCocontentfrom0 .2 %to 0 .3 % ,isoneoftheimportantmaterialsusedtoupgradeCoores .Duetolow gradeCoanditsintergrowingwithseveralmaterialssuchasFe ,CuandNietc .,itsupgradeandseparationaredifficult[1] .ThemethodmainlyusedinChinaandabroadistoroas… 相似文献
19.
Thelifecycleoftheproductsisbecomingshorterandshorterwiththeforthcomingoftheeraofknowledgebasedeconomy,theformingofworldmarketandthemanifoldneedsofcustomers.Time,quality,cost,servicehavebecomeeffectivemeansofcompetitionamongenterprise.Enterprisesshoul… 相似文献
20.
基于生态学种群Logistic共生演化的改进模型,从产业共生视角,运用长江经济带9省2市2005—2015年的基础数据,对先进制造业与生产性服务业之间的共生演化状态进行了实证分析。结果表明,在描述长江经济带先进制造业与生产性服务业的共生演化过程中,运用经过更符合实际的改进Logis- tic共生演化模型能够很好地展现其演化过程,同时发现两者之间属于非对称性互惠共生行为模式,后者对前者的共生促进作用大于前者对后者的共生拉动作用。由于对称性互惠共生行为模式最稳定、最有效率,并且具有最大的共生能量,提出了长江经济带先进制造业与生产性服务业实现对称性互惠共生演化的若干建议。 相似文献