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1.
1 Introduction Elasticmetalplastic (EMP) journalbearingisakindoforiginalbearing .Thebushiscomposedofthree layermaterials :purepolymerlayer ,polymere lasticlayerandsteelbase .Thefirsttwosuperstra tumsarecalledcompositelayer.Therigidityofcom positelayerisone te…  相似文献   

2.
INTRODUCTIONCommunicativecompetence ,anotionprop osedbyHymes(1 972 )andothersasachallengetoChomsky s (1 965)conceptoflinguisticcom petence,hasnowbecomeaprimarytheoreticalconstructinsociolinguisticsandanumberofre lateddisciplines,especiallyforresearchingintothere…  相似文献   

3.
现在 ,澳大利亚大约有 130 0个苗族人 ,(statis ticsinthisentryareestimatesmadebytheHmongcommu nity .The 1991censusconductedbytheAustralianBureauofStatisticsdidnotincludeanancestryquestion ,norwasHmongcodedasalanguage .ThustheAustralianHumongareconcealedamongstthestatisticsfor)是…  相似文献   

4.
INTRODUCTIONInexcavation ,normalanalysisisnotgoodenoughtomeetengineeringneedsduetotheun certaintyofforcesappliedonbracestructures,soilcharacteristics,andsoilmodelused .Toguaranteethattheconstructionprocesscanbesmoothlyperformed ,measurementsinsituareusua…  相似文献   

5.
INTRODUCTIONMotioncaptureplaysanimportantroleinthecreationofspecialeffectsinmanyfields.Asidefromuseinfilmsandanimations,motioncapturehascomprehensiveapplicationsintheanalysisofathleteperformance ,medicaldiagnostics,surveillance ,videoretrieval,etc.Conven…  相似文献   

6.
INTRODUCTIONThegenerationofwasteswillbeincreasedwiththerapiddevelopmentoftechnologiesandindustrialpractices.Alargeamountofhazardousortoxicwastesisgeneratedintheprocessingin dustry(Nathanson ,1 986) .Althoughconvention alend of pipewastetreatmenthasprovedtobe…  相似文献   

7.
INTRODUCTIONIncoldregions,soilexpansionresultedfromasoilfreezingprocessoftendeformsanddamagessomeconstructionfoundations.Onewaytostabilizethefoundationisuseoftwophaseclosedthermosyphoninthecoldregions.Duetoitsexcellentheattransfercharacteristics,thetwo…  相似文献   

8.
1 Introduction ThespatialGreen’sfunctionsofmulti layeredmediaareusefulinanalysisofantennaandintegratedcircuitstructures.Theyareconstructedintwosteps.ThefirstistoderivethespectralGreen’sfunction .ThesecondistomakeinverseFouriertransformoftheGreen’sfunc t…  相似文献   

9.
INTRODUCTIONHeterodinuclearcomplexesareofgreatinter estforthestudyofsynergisticeffectsfoundinbimetalliccatalysis(Dombek ,1 985;JnLingetal.,1 993 ;Mccollumetal.,1 996) .Moreandmoresyntheticrouteshavebeenreportedinthelastdecade(Harteretal.,1 989;Scottetal.,1 993 ;Diamondetal.…  相似文献   

10.
NTRODUCTIONDiscardednon degradableplasticfilmswide lyusedinfoodpackagingcause“whitepollu tion”totheenvironment.Inrecentyears,theus  相似文献   

11.
1  Introduction Thetraditionalmethodtostudytheperformancesofinductionmotorsisbasedontheconceptofequivalentcircuit.Theparametersintheequivalentcircuitareusuallyobtainedbymagneticcircuitcomputation .Inre centyearsithasbecomepracticaltousefiniteelementmeth…  相似文献   

12.
1 Introduction Monocrotophosandparathion methyl,whichbelongtoorganophosphorouspesticideswithstrongandex tensivepoison ,wereappliedwidelyforthepreventionandcontrolofplantdiseasesandeliminationofpests .Itistakenmoreattentiontostudythepotentialharmtopeoples…  相似文献   

13.
Educationalgroupisateaching&learninginstitute ,whichisbroughtforthbythemarketoperationinforeigneducation .Itconveyspositivemeaningintermsofculturaltransportationandaccumulation .Thisarticlefocusesontheorigin ,nature ,characteristics,andinfluenceofforeigne…  相似文献   

14.
1  Introduction Withthedevelopmentofthefrequencyconversiontechnology ,thefrequencyconvertersareextensivelyemployedinVVVFdrivesystems.Theyareusedtorealizesoftstartingoftheinductionmotor ,whichisoneoftheiradvantages.Nevertheless,inpractice ,thein verter moto…  相似文献   

15.
INTRODUCTIONItiswellknownthatstresssingularitymayariseattheinterfaceedgeofbondeddissimilarmaterials.Duetotheintrinsicelectroelasticcou plingbehavior,thestresssingularitywillleadtothesingularbehavioroftheelectricdisplace ment.Dingetal.( 1 996)deducedthegener…  相似文献   

16.
ShapeOptimalDesignofHydrodynamicBearingBasedonDynamicCharacteristicsChenYunfei(陈云飞)QianRuiming(钱瑞明)(DepartmentofMechanicalEng...  相似文献   

17.
Amongthefourbasicskills ,writingistheweakpointofcollegestudentsinChina .Althoughinrecentyearsmuchmoreemphasisisputonthestudents’productiveskills ,duetothelimitedtime ,theyarenottakenveryseriouslyinpractice .IncurrentcollegeEng lishteachinginChina ,usuallyt…  相似文献   

18.
1IntroductionAstandardMarkovchainisastochasticproceswithaconstanttransitionprobabilitymatrixP,wherePisaonesteptransitionprob...  相似文献   

19.
校澹睿洌酰欤酰恚骉X1IntroductionDesigningareliableandpracticablecontrolerforanonlinearsystemisnotsuficientlyaddressedbycon-ventionalco?..  相似文献   

20.
INTRODUCTIONTheactiveingredientintheformulatedprod uctSumithion ,fenitrothion [0 ,0 dimethyl0 (3 methyl-4 nitrophenol)phos phorothioate] ,isanorganophosphate (OP)insecticideusedinag ricultureforcropprotectionandcontrolofvectorborndiseasesofpublichealthandveteri…  相似文献   

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