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1.
POLYMERIZATION OF METHYL METHACRYLATE WITH IRON-YTTERBIUM DINUCLEAR METALLOCENE CATALYST 总被引:1,自引:0,他引:1
INTRODUCTIONHeterodinuclearcomplexesareofgreatinter estforthestudyofsynergisticeffectsfoundinbimetalliccatalysis(Dombek ,1 985;JnLingetal.,1 993 ;Mccollumetal.,1 996) .Moreandmoresyntheticrouteshavebeenreportedinthelastdecade(Harteretal.,1 989;Scottetal.,1 993 ;Diamondetal.… 相似文献
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AThisseemstobeasurprisetodaythatacomputer 1 .canmakethebestdecisionaboutmatchtheright2 .manwiththerightwoman .Mr.WalkerMissDunfieldaresuch 3.acouple(夫妇 ) .Whentheyfirstmetwith ,theydidn’thavemuch 4.totalkofsinceeverythingwerewrittenontheircards . 5 .Theyaresoperfe… 相似文献
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ItwasMonday .MrsSmith’sdogwashungry ,buttherewas 1 meatinthehouse .MrsSmithtookapieceofpaperand 2 ,“Givemydoghalfapoundofmeat.”Thenshegavethepieceofpapertoherdogandsaid ,“ 3 thistothebutcher (卖肉人 ) ,hewillgiveyour 4 today .”Thedogtookthepieceofpaperand 5 tot… 相似文献
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SomeonestoppedMrHuntwhilehewaswalkinginthestreet.HefounditwasMrBrown ,oneofhisoldf 1 .Theywerebothhappybe causetheydidn ts 2 eachotherforyears .MrHuntaskedMrBrowntodinnerandhea 3 .MrHunt swifebroughtsomem 4 andvegeta blesintheshop .Theyweretalkinginthesit… 相似文献
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CHARACTERISTICS AND EVOLUTION OF MESOZOIC FORELAND FOLD AND THRUST BELT IN WESTERN KUNLUN SHAN,CHINA
INTRODUCTIONKunlunShanlocatedatthejunctureofEur asiaandGondwanaisaveryimportantsubjectingeologicalresearch (Fig. 1 ) .ManygeologistsconductedresearchesinWesternKunlunShan(Panetal.,1 990 ,1 992 ,1 995,1 996;YaoandHsu ,1 994 ;Lietal.,1 996;Dingetal.,1 996;Matteetal.,1 996) .Triassicstrata… 相似文献
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1 Introduction IntheimplementationofCIMSinenterprises,thedevelopmentoftheCAD/CAMtechnologyandtheap pearanceofmatureCAD/CAMsoftwareprovidereliableandefficientdesigntoolsfortheexploitationanddevel opmentofproducts.UGII (aCAD/CAMsoftwareofEDScorporation)hasb… 相似文献
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吴·白音那 《内蒙古师范大学学报(哲学社会科学版)》2001,(Z1)
1 .IntroductionInInnerMongoliaAutonomousRegion ,moreandmoreMongolianstudentsbegintolearnEn glishintherecentyearsasaforeignlanguage (orasathirdlanguage)atcollegesanduniversities.Beforetheygotocollege,mostofthemhaven’tlearnedEnglishbyrestrictionsofvariousco… 相似文献
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EXACT SOLUTION OF AN EXTERNAL CIRCULAR CRACK IN A PIEZOELECTRIC SOLID SUBJECTED TO SHEAR LOADING 总被引:4,自引:0,他引:4
INTRODUCTIONDuetotheinherentweaknessorbrittlenessofpiezoelectricceramics,thefractureofpiezo electricmaterialshasgainedconsiderableinter est.Mostpublishedworksdealtwithtwo dimen sionalstudyofcracksinpiezoelectricmaterials(Pak ,1 990 ;Suoetal.,1 992 ;ZhongandMegui… 相似文献
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ZHENG Yong ai YU Feng LIU Yu rong . Department of Mathematics College of Science Shanghai University Shanghai China . Department of Mathematics Yangzhou University Yangzhou China 《上海大学学报(英文版)》2001,(1)
1 Introduction Let (M ,g)beacompactorientedandconnectedRiemanianmanifoldofclassC∞ withoutboundary ;ΔbetheLaplacianactingon p formsforp =0 ,1,… ,n .Weknowthattheeigenvaluesformanon decreasingsequencedenotedbyspecp(M ) ={ 0≤λ0 ,p≤λ1,p≤… }whereeacheigenvalueisrepeatedmany… 相似文献
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1 Introduction Uptonow ,themathematicalmodelsthatdescribetheparticlebehavioratsolidifyinginterfaceappearedalot[1~ 1 1 ],butnoneofthemissuitedfortheparticlebe havioratinterfacewiththeapplicationofexternalforcefield(e.g .EMFF) .Andwiththedevelopingofelec tromagn… 相似文献
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INTRODUCTIONIntheManifestooftheCommunistParty,MarxandEnglesdeclared :“Inplaceoftheoldbourgeoissociety ,withitsclassesandclassan tagonisms,weshallhaveanassociation ,inwhichthefreedevelopmentofeachisthecondi tionforthefreedevelopmentofall”(Marx&En gels ,1 984 ) .… 相似文献
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SHENG Ping xing Department of Mathematics College of Sciences Shanghai University Shanghai China 《上海大学学报(英文版)》2001,(2)
1 Introduction DavidHilbertposedtwentythreeproblemsinhisspeechattheInternationalCongressofMathemati ciansinParisin 190 0 .AtranslationofthetextofHilbertproblemsaspublishedintheBulletinoftheAmericanMathematicalSocietyof 190 3wasrestatedinProceedingoftheSympos… 相似文献
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INTRODUCTIONMoleculardynamics (MD)simulationwasfoundtobeanimportantmethodologyforstudyofcondensedmatter (Tsuzukietal.,1 996) .Kiselevan 相似文献
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INTRODUCTIONSemisyntheticanaloguesofthenaturallyoc curringpodophyllotoxin (1 )havedrawnmuchrenewedinterestinrecentyearsasaresultofthedevelopmentofetoposide(VP 1 6,2 )andtenipo side (VM 2 6,3 )asanticancerdrugs(Estapeetal.,1 982 ) .Mostofthestudiesonpodophyllo toxinsfo… 相似文献
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Abstract : IncinerationasamethodofreducingMunicipalSolidWaste (MSW)volumeandrecoveryofener gyhasbeendevelopedgraduallyinChina .Moreattentionispaidonpolychlorinateddibenzo p dioxinsandpolychlorinateddibenzofurans (PCDD Fs)formedinMSWincinerationprocess .Thisp… 相似文献
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MIRROR EXTENDING AND CIRCULAR SPLINE FUNCTION FOR EMPIRICAL MODE DECOMPOSITION METHOD 总被引:43,自引:0,他引:43
INTRODUCTIONTheEmpiricalModeDecomposition (EMD)methodanditsHilbertSpectrumtechniqueisanewlydevelopedmethodfortimeseriesanalysis(Huangetal.,1 998) .Thismethodissuitableforanalyzingnonlinearandnon stationarypro cessbasedonanempiricalapproachandpro videsaprecis… 相似文献
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1 Introduction A .M .W .Glasshasshownthefreel groupFη ofmostinfiniterankηtobeisomorphictoadoublytransi tivel subgroupofthel permutationgroupA(Q) [1,2 ] .S .H .McClearyhasprovedthatthefreel groupFηoffiniterankηhavepossessedafaithfully 2 transitiverep resentationonth… 相似文献
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Mikeworkedinanofficeinasmalltown .Onedayhisboss (老板 )saidtohim ,“Mike ,IwantyougotoRichmond,toanofficethere ,toseeMrShute .Here’stheaddress.”MikewenttoRichmond .Whenhewalkedoutofthestation ,hethought,“Theofficeisn’tfarfromthestation .I’llfinditeasily .”Butaftera… 相似文献
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Ⅰ .Blankfilling(汉语、英语答题均可 ) :( 10 % )1.AftertheMay 4thMovement, proposedfaithfulnessandsmoothnessasthecriteriaoftransla tion .2 .LuXunand introducedthroughtransla tionvolumesofOrientalandOccidentalworksofpro gressiveliterature.3 .By wemeanrepeatingtheimportant… 相似文献