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1.
DirectElectronTransferReactionsofGlucoseOxidaseandD┐AminoAcidOxidaseataGlasyCarbonElectrodeinOrganicMediaWeiJianjunQinYiqinLi...  相似文献   

2.
INTRODUCTIONSemisyntheticanaloguesofthenaturallyoc curringpodophyllotoxin (1 )havedrawnmuchrenewedinterestinrecentyearsasaresultofthedevelopmentofetoposide(VP 1 6,2 )andtenipo side (VM 2 6,3 )asanticancerdrugs(Estapeetal.,1 982 ) .Mostofthestudiesonpodophyllo toxinsfo…  相似文献   

3.
BAYESIANMETHODOFMACROECONOMICALDECISIONChenPing(陈平)(DepartmentofMathematicsandMechanics)BAYESIANMETHODOFMACROECONOMICALDECISI...  相似文献   

4.
构造如图所示的几何图形,设⊙O为单位圆,直角△ABC的边AC、BC切⊙O于M、N,PE⊥OM,∠AOM=∠α,易知sinα=PE,cosα=OE,tgα=AM,ctgα=BN,secα=OA,cscα=OB.1 证明同角三角函数的基本关系式平方关系 在Rt△OEP、Rt△OMA、Rt△BNO中,应用勾股定理可得sin2α+cos2α=1,1+tg2α=sec2α,1+ctg2α=csc2α.例数关系 利用Rt△OEP∽Rt△OMA,Rt△OEP∽Rt△BNO,Rt△OMA∽Rt△BNO,分别得1…  相似文献   

5.
INTRODUCTIONTomeettherequirementsofEMIstandard ,switchingmodeconvertersshouldlimititsswitchingrippleofinputcurrenttoalowlevel.OneofthetypicaltraditionalmethodsistoplaceacostlyandbulkyEMIfilterattheinputcircuitoftheconverter.ForAC DCconverterstheinputfi…  相似文献   

6.
THETAYLOREXPANSIONOFAFUNCTIONOFFUNCTIONSSongBaisheng(宋柏生)(DepartmentofMatheniaticsandMechanics)THETAYLOREXPANSIONOFAFUNCTIONO...  相似文献   

7.
ISTHENOVELDEAD ?Therehasbeennolackofpropheciesofthedeathofthenovelsincethebeginningofthe2 0thcentury .Manyprestigiouscritics,suchasT .S .Eliot,OrtegaY .Gasset,AlbertoMoraviaandCyrilConnolly ,haverelentlesslypronounceddeathsentenceonthenovel.Althoughthousandso…  相似文献   

8.
INFLUENCEMEASUREOFPERTURBATIONANDVARIABLESINREGRESSIONMODELSHuYueqirig(胡跃清)(DepartmentofMathematicsandMechanics)INFLUENCEMEAS...  相似文献   

9.
INTRODUCTIONMucunnewasthefirsttouseERCP (Endo scopicRetrogradeCholangiopancreatography)inthediagnosisofdiseasesofbileductsandpan creasin 1 968.Withimprovementofendoscopicequipment,thetechniquewasdevelopedrapid ly.TherearefewreportsintheworldontheuseofERCPfo…  相似文献   

10.
·Reviews·OntheInteractionsofMicrowavewithLightwave XUDe ming ZHOUShi ping  ( 1 )………………………………·Letters·ANewElasticityandFiniteElementFormulationforDifferentYoung’sModuluswhenTensionandCompressionLoadings YEZhi ming YUHuan ran YAOWen juan  (89)……………………………BriefIn…  相似文献   

11.
IMPLEMENTATIONOFDISCONTINUOUSCOEFFICIENTINVERSIONFORACLASSOFHYPERBOLICEQUATIONLiuJijun(刘继军)(DepartmentofMathematicsandMechani...  相似文献   

12.
INTRODUCTIONAsswitchingmodepowersupply (SMPS)hasbecomeincreasinglysophisticated ,commonmodesuppressiontechniquesinvolvinglowcostandcompactpackagingarecalledupontoper formamoreimportantroleincomplyingwithregulatorylimits.Inatypicalboostconverter,commonmod…  相似文献   

13.
TimeandEnergyOperatorsinQuantumMechanicsLiChunfangWangQi(ColegeofSciences)AbstractStartingfromatimeoperator,theformoftheso-ca...  相似文献   

14.
INTRODUCTIONMetallocenesincombinationwithmethylalu moxaneorperfluorinatedboratesascocatalystformextremelyactivecatalystsforthepolymer izationofolefins ,cycloolefins,styrene ,andbutadienearenowusedinindustrialprocesses(Scheirsetal.,2 0 0 0 ;Kaminskyetal.,1 997b ;Bo…  相似文献   

15.
INFLUENCEOFUNBALANCEONLOW-FREQUENCYVIBRATIONOFROTOR-BEARINGSYSTEMYansJiansang(杨建刚);DaiDecheng(戴德成);GaoWei(高伟)(ResearchInstitu...  相似文献   

16.
DOSTOIEVSKYETMALRAUXXuFengDostoivsky,grandecrivainrussedudix-neuviemesiecleestsansduuteundesnomsetrangersqu'onciteleplussouve...  相似文献   

17.
PROPERTIESOFSOLUTIONSOFNEUTRALDIFFERENTIALEQUATIONSWITHFORCEDTERMSJiGuojun(计国君)WangZhengxian(王政贤)(DepartmentofMathematicsandM...  相似文献   

18.
晋东南师范专科学校位于长治市城区境内 ,占地面积92 2 0 0m2 。校园环境优美 ,绿树成荫 ,植物种类繁多。经过初步调查 ,校园内现有植物 65科 ,13 0属 ,166种。现按《克郎奎斯特分类系统》概述如下 :Phylum 裸子植物门 GYMNOSPERMClassis 铁树纲 CYCADOPSIDAFamilia 1 苏铁科 Cycadaceae铁树 CycasrevolutaThunb .Classis 银杏纲 GINKGOPSIDAFamilia 2 银杏科 Ginkgoaceae银杏 GinkgobilobaL .Cla…  相似文献   

19.
IMPROVEDMODELOFMULTIPATHTRAFFICASSIGNENTANDNODEASSIGNENTALGORITHMWangWei(王炜)(ResearchListituteofTransportation)IMPROVEDMODELO...  相似文献   

20.
PARAMETERIDENTIFICATIONOFLINEARSYSTEMSVIAGENERALHYBRIDORTHOGONALFUNCTIONSYinJiahong(尹家洪)(DepartnientofMatheniaticsandMechanic...  相似文献   

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