共查询到20条相似文献,搜索用时 31 毫秒
1.
Itknownthatsmallamountsoffluxonthesurfaceofstainlesssteelcanincreasethedepthofweldpene trationinTIGweldingbyafactorofthree[1] .Thisprocessisreferredtoas”ATIG”orTIGweldingacti vatedbyflux .Therehavebeenthreepublishedphys icalmechanismsthatarepossiblecontri… 相似文献
2.
Afurtherdiscussiononapplicationofladderopera-torinquantummechanicsZhengRenrong;ZhuShunquan;LinXinwei(DepartmentofPhysics,Sout... 相似文献
3.
StructuresofTurbulentFlowsinNear┐walRegionZhangZhaoshun(张兆顺),XuChunxiao(许春晓)DepartmentofEngineeringMechanics,TsinghuaUniversi... 相似文献
4.
Onepossiblemechanismforsignatureinversionofodd-oddnuclei¥ZhuShunquan;ZhengRenrong(DepartemntofPhysics,SouthwestChinaNormalUni... 相似文献
5.
6.
AlignmentMechanismofLiquidCrystalMoleculesontheFluoratedPolyimideSurface*XuShouyi(徐寿颐),LiZhijun(李志军)DepartmentofChemistry,Tsi... 相似文献
7.
宋发富 《曲靖师范学院学报》2001,20(4):85-91
I.IntroductionThepurposeoftheessay ,accordingtothewriter,is“todemonstratethatlogic,farfrombeingadry ,pedanticsubject,isaliving ,breathingthing,fullofbeauty,passion ,andtrauma .”ThestoryissetinalawschoolattheuniversityofMinnesota,U .S .A .Theprotagonist,aself -con… 相似文献
8.
A UNIFIED MODEL FOR SOLAR FLARES 总被引:1,自引:1,他引:0
Chen Pengfei Fang Cheng Ding Mingde Tang Yuhua 《南京大学学报(自然科学版)》1999,(4):496-499
Solarflaresareusuallyclassifiedintotwotypes,i.e.,compactandtwo-ribbonflares,whichwerethoughttorequirequitedifferentphysicalmechanisms[1].Duringtheeruptionoftwo-ribbonflares,denseplasmaloopsriseinthecoronaforover10hours,withtheirfoot-pointsseparating.… 相似文献
9.
StabilityofNonlinearVibrationsofaDeployingFlexibleBeam*LiJunfeng(李俊峰),WangZhaolin(王照林)DepartmentofEngineeringMechanics,Tsingh... 相似文献
10.
IntroductionSeveralmodelshavebeendevelopedtoestimatetheeffectiveelasticpropertiesofmaterialswithinclusions,e.g.,holesandmicrocracks.Thefamousmicromechanicalmodelsincludethecompositecylindermodel(CCM)byHashin[1],theselfconsistentmethodproposedindependently… 相似文献
11.
IntroductionPhasetransitionaccompaniessignificantchangeinmechanicalpropertiesofpolymer.Alargedropofmodulusandenhancedmi cro Brownianmotiononheatingthroughglasstransitionormeltingtemperaturecanbeusedinthemoleculardesignofshapememorypolyurethane (SMPU ) .A… 相似文献
12.
IntroductionMechanicalalloying(MA)ofelementalpowdermixtureandmechanicalmilling (MM )ofinter metallicpowderhavebeensuccessfullyemployedinrecentyearsasamethodforsynthesizingamor phousandnano crystallinealloys[1~ 3 ] .XAFSmethodwassuccessfullyusedforunderstandi… 相似文献
13.
赵兰香 《科技导报(北京)》1995,(4):44-46
产学研合作的机制分析AnalysisonMechanismofCooperationamongEnterprises,InstitutionsofHigherLearningandScientificResearchInstitutions¥//赵兰... 相似文献
14.
IntroductionThesixspherical prismatic spherical(6SPS)parallelmech anismisgenerallyemployedina 6DOFsimulator (Fig .1) ,whichisthewell knownStewartplatform[1] .Itconsistsofamo bileplatform ,afixedbaseandsixextensiblerods.Sphericaljointsareusedtojointhesixrodswithth… 相似文献
15.
ExperimentalInvestigationofTurbulentShearFlowbyPIV*XuHongqing(许宏庆),WuJia(吴嘉)DepartmentofEngineeringMechanics,TsinghuaUniversi... 相似文献
16.
17.
IntroductionThemostcommonmethodofyarnproductionistheinsertionofcontinuous ,unidirectionaltwistintoaparallelarrayoffibersorfilaments.Thehightorsionalstressesgeneratedinsuchaprocesshaveaconsiderableeffectonthestabilityandmechanicalcharac teristicsoftheya… 相似文献
18.
Introduction Since 196 0 s ,withthedetailedstudyoftransformationalgen erativegrammar,Englishteachinghasgraduallyabandonedthemechanicpatterndrillsusedinaural oralmethodin 195 0 s,andfocusedondevelopingstudents communicativecompetence .MoreandmoreEnglishteacher… 相似文献
19.
Qu Yan |hui Non |linear Scientific Center Wuhan University Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(1):5-8
Forstudyingthedimensiontheoryofdynamicalsystem ,PesinintroducedCarath啨odorystructure(C structure)whichleadstothegeneralizationsofbothclassicaldimensionsandtopologicalpressures;HeconsideredtwotypicalC structureswhichconnectsrespectivelytheopencoveringand… 相似文献
20.
IntroductionSincethe1940s,manyresearchershavestudiedtheblastingfractureofmetalcylindricalshellssubjecttotransientloadsinawiderangeofengineeringapplications.Theoreticalandexperimentalmodelshavebeendevelopedtodescribethefracturemechanismandruptureconditio… 相似文献