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1.
itisdifficulttoteachcompositionskillsfortheteachersofEnglish.Teachershavebeenexploringbetterwaystoteachformanyyears.Thispaperdealswithawayofteachingcompositionskillsanddesignedaguidedcompositioncourse,whichhelpsthestudentsobtainthewritingskill  相似文献   

2.
Oneofthesignificantproblemsarisingfromthemanagementandoperationofmutualfundishowtopre serveappropriatecash position ,whichconsistsofthecashpositionheldbymutualfundandthecashinflowre sultingfrominvestors′purchasingmutualfundshares ,tomeetinvestors′redemp…  相似文献   

3.
1 Introduction Inordertodetecttoxicgasleakageandtopreventspontaneouscombustionandexplosionofcombustiblegasesandorganicreagent,varioussortsofgassensorshavebeendeveloped,thedevicesthatwerespeciallyusedtodetecttraceoftoxicgasalsohavebeenresearched.Theb…  相似文献   

4.
1 Introduction Itisaneasytaskforexperiencedcytopathologiststoidentifycellsunderopticalmicroscopes,butitisverycomplicatedforcomputertocarryonthesamemissionautomatically.Oneofthemajorreasonsisthevariousparametersandfeaturesofcellsthatoftenoverlapwithe…  相似文献   

5.
INTRODUCTIONDoxorubicin(DOX)isakindofanthracy clinesantibioticswhoseantineoplasticspectrumisbroadandeffectisstrong.Ithasgainedwide spreaduseinthetreatmentofchildhoodleuke miaandsolidtumors.However,itsclinicaluseislimitedbyitscardiotoxicity .Thecalciumover…  相似文献   

6.
Thefirstreportedmeasurementofself generatedmagneticfieldsinlaser productedplasmaswasthatofKorobkinandSerov[1] .Theyusedasmallinductioncoiltomeasurethepresenceofamagneticmomentofalaser producedsparkinair.Later,manyotherexperiments[2 ,3 ,4 ] alsore vealthatkiloga…  相似文献   

7.
1 Introduction ThenecessityforgeneralizingthescalarPadeapproximantstothem×nmatrixPadeapproximantswasdiscussedinthesettingoftheminimalpartialrealizationproblem[1].ThefeasibilityforrecursivecomputationofthematrixPadeapproximantsinthecontextofminimalp…  相似文献   

8.
一、IntroductionLanguagetestingisrelatedtothelanguage ,languagelearningandlanguageteaching .Wardhaughhasrightlyobservedthatlanguageteachinginvolvesatleastthreedis ciplines:linguistics ,psychology ,andpedagogy .Linguis ticsprovidesinformationaboutlanguageinge…  相似文献   

9.
1 Introduction Superconductingweaklinksareveryintriguing ,duetothefactthattheserelativesimplestructuresshowJosephsoneffect[1] .Intheory ,onlythestructuresthathavedimensionscomparablewiththecoherencelengthζareexpectedtoshowtrueJosephsonbehavior[2 ,3] .Inpracti…  相似文献   

10.
1 Introduction Thenotionofsymmetryofadynamicalsystemhasbeenasubjectoflongstandinginterestinphysicsandmathematics.Roughlyspeaking,adynamicalsystempossessingsymmetryifitsdynamicsareinvariantunderatransformationorafamilyoftransformations.Theexistenceo…  相似文献   

11.
1 Introduction Theimagelosslesscompressioncodingisanimportantpartofthedigitalimagecompressionresearch .Medicalimages,satelliteimagesandseismicdatademandloss lesscoding .Thebasicideaofcompressionistoexploitthecorrelationstructurepresentedinmostreallifeim …  相似文献   

12.
ThestudyofsolitarywaveshasbeenasubjecthighlypopularandfullofinterestsinecRussell[1]firstobservedthesolitarywavesinachannelandtheresearchontheinternalsolitarywavesinstratifiedfluidsisoneofthebranchesofthissubject.Thereareextensivelyinternalsolitarywav…  相似文献   

13.
INTRODUCTIONThepurposeofthisworkistoinvestigatethebackwellposednessofanonuniformbeamequationwithboundarycontrols.Itiswellknownthatifthecross sectiondimensionsofthebeamisnotnegligiblecomparedwithitslength ,thenitisnecessarytoconsidertheeffectoftherotato…  相似文献   

14.
1 Introduction Thesolutionsoftemperatureanddisplacementfieldsofdamsareofinteresttomanyresearchersinhydropowerindustryandothersforyears,becauseoftheirimportanceinthesafetyofdams.Generallyspeaking,numericalsolutionsweredevelopedtounderstandthedisplace…  相似文献   

15.
1 Introduction ThestudyofB啨ziersurfaces’convexityisusefulinCAGD (computeraidedgeometricdesign)andtherehavebeenmanydiscussionsandresultsforthecon vexityoftheB啨ziersurfaceoveratriangle[1~ 6] .ButfortheconvexityoftheB啨ziersurfaceoverarectan gle ,whatweknewisli…  相似文献   

16.
1 Introduction Thesputteringtechniquewellsuitsthegrowthofcompoundsandalloys ,whoseelementalconstituentshavesignificantlydifferentmelting pointsandvaporpressures.AconsiderableamountofworksaboutrfsputterdepositionofbinaryⅢ Ⅴcompoundfilmshasbeenpublished[1~…  相似文献   

17.
InhisPrinciplesofPragmaticsLeechusestwo questions :[1]Whatdoes“X”mean ?[2 ]Whatdidyoumeanby“X” ?tode scribethescopeoftwobranchesoflinguistics :semanticsandpragmatics .① Thisarticleinfactgrowsoutofthetwoquestionsandthepurposeofitistodiscovertherelationshipanddi…  相似文献   

18.
1 Introduction Anumberoffullwaveanalyseshavebeenproposedinthepasttwodecades[1~3].Theseallpredictthecharacteristicsofmicrostripantennasrigorouslyathigherfrequencies.Thespectraldomainmethodofmoments[3],usingsimplebasisfunctionsrequiresalargesizematrixsuchas(…  相似文献   

19.
1 Introduction ThemagneticmaterialsbeingusedinthetreatmentofdiseasesareoneofthosefastestgrowingmeasuresinmedicalscienceinChina.Thepursuingfortherapeuticalmechanismsofmagneticmaterialsisalsoanareaoftraditionalchinesemedicine.Itisnowconsideredtolessen…  相似文献   

20.
Zirconiumalloyspossessingverylowabsorptionforthermalneutrons,goodcorrosionresistanceinhightemperaturewater ,andreasonablemechanicalprop ertiesareimportantmaterialsfornuclearindustry ,andhavebeenemployedasnuclearfuelcladdingandasstructurematerialsinlight…  相似文献   

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