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1.
1 Introduction Itiswellknownthatthetorquedevelopedbyapermanentmagnetbrushlessdcmotorisproportionaltothemagnitudeofmotorphasecurrents.ThislinearrelationshipmakesitconvenienttocontrolBLDCMtorqueproductionbyregulatingthemotorphasecurrents[1].Inthispaper,th…  相似文献   

2.
1 Introduction Inthelasttwodecadeseverincreasinginterestofscientistsandengineershasbeenattractedtoinverseandoptimizationproblemsofaerodynamics,butuptonowintheliteratureallpapersoninverse/hybridproblemsarestillconfinedtosteadyflow[1-3]. InRef.[5],th…  相似文献   

3.
1 Introduction ThemagneticmaterialsbeingusedinthetreatmentofdiseasesareoneofthosefastestgrowingmeasuresinmedicalscienceinChina.Thepursuingfortherapeuticalmechanismsofmagneticmaterialsisalsoanareaoftraditionalchinesemedicine.Itisnowconsideredtolessen…  相似文献   

4.
1 Introduction Itisknownthattheprotectionefficiencyofzincispartiallyasaresultofformingaprotectivefilmonabasemetal,suchassteel.Althoughpurezinccoatingprovidessomedegreeofprotectionforthesubstrate ,zincisconsumedrapidlyinaseverecorrosionenvi ronment.Conse…  相似文献   

5.
INTRODUCTIONInsectpostembryonicdevelopmentconsistsofgrowthpunctuatedbyaseriesofmoltsfollowedbymetamorphosis.Thesemoltsandmetamor phosisareinitiatedandcoordinatedbyhormones(Riddiford ,1 994 ) .Itisgenerallyacceptedthattheinterplayofecdysteriods,agroupofstero…  相似文献   

6.
AdaptiveConsistentParameterEstimationforNon-GaussianMAProcessesUsing4thOrderCumulantWangXinwen(王新文)HeZhenya(何振亚)(Departmentof...  相似文献   

7.
1 Introduction Thefundamentalphysicalmetallurgyofthermomechanicalprocessing(TMP)hasbecomemuchbetterunderstoodoverthelasttwodecades[1~8].ItiswellcommonlyrecognizedthattheminuteadditionofstrongcarbonitrideornitrideformingelementssuchasNb,TiandVtakesveryimp…  相似文献   

8.
1 Introduction Breastcancerisoneofthemostmalignantdiseases,especiallyforwomen.Anearlydetectioncansavelives,achievedbyearlydetectionwithmammograms.Itisanintensivetaskfortheradiologistbecausemultiplereadingsofasinglemammogramarenecessaryinordertoincre…  相似文献   

9.
INTRODUCTIONThephysicsofavortexlattice (VL)intype IIsuperconductorshasbeenthefocusofinterestsincethebeginningofhigh Tc research .Itiswell knownthat,aftertheexternalmagneticfieldexceedsitscriticalvalueHc1 ,themagneticfieldcanpenetrateatype IIsuperconductorin…  相似文献   

10.
1 Introduction Inthispaper ,atime scaleandpitch scalemodifica tionalgorithm[2 ] basedonsinusoidalmodelisappliedin prosodicmodificationofChinesespeech .Itisapitch synchronousalgorithm .Eachframeofshort termspeechsignalisdecomposedintothesumofsi nusoidalwavesof…  相似文献   

11.
一九九四年下半年河北省高等教育自学考试阅读与写作试题Ⅰ.Findthebestchoice(15points)1.Iwanttohavetwo………………○A.scissorsB.setsofscissorsc.piecesofscissorsD.p...  相似文献   

12.
英语中有些动词 ,如remember、stop、forget等 ,其后既可以接动名词 ,也可以接动词不定式 ,但他们所表示的意思有明显的差异 ,同学们在学习中应特别注意。remembertodosth .记住要去做某事 (事情未做 )rememberdoingsth .记得曾做过某事 (事情已做 )例如 :Remembertobuymeseveralstampsnexttimewhenyoucome .记住下一次来时给我买几张邮票。Irememberhavingpaid/payinghimthemo ney .我记得把钱付给…  相似文献   

13.
PARTONEⅠ.用适当的语法形式或词汇填空。从[A][B][C][D]四个选项中选出一个正确答案。(本大题共30小题,每小题1分,共30分)1.ItissaidthatMr.Smithisandhard-workingman.[A]honestBthehonest[C]ahonestDanhonest2.Thereisice-creamleftinthefridgeisn'tthere﹖[A]onlyalittleBonlylittle[C]onlyafcwDonlyfew3…  相似文献   

14.
大足石刻分期述论宋朗秋ThePeriodizationoftheDazuGrottoCarvingsSongLangqiuTheartoftheDazustonecarvingsisprofoundlyreligious.Inthispaper,th...  相似文献   

15.
名人·名句     
Yesterdaywillnotbecalledagain .JohnSkelton(14 6 0~ 15 2 9)昨日不再来。●约翰·斯克尔顿Itisnotwisetobewiserthanisnecessary .PhilippeQuinault聪明反被聪明误。●菲利浦·奎纳特Betterawittyfoolthanafoolishwit.Shakespeare(15 6 4~ 16 16 )宁为聪明的愚夫 ,不做愚蠢的才子。●莎士比亚Imightsaythatsuccessiswonbythreethings :first,ef…  相似文献   

16.
NTRODUCTIONTemperaturefieldchangewillproducether malstressesinstructures.Itiswellknownthatdifferentmaterialsgeneratedifferentstressre sponses ,andthatinsomecases,thermalstress esarelargeenoughtocausestructurefailure .Soitismeaningfulandimportanttostudydy…  相似文献   

17.
·Reviews·PhysicalandMathematicalModelingoftheArgon OxygenDecarburizationRefiningProcessofStainlessSteelWEIJi He  (1 )………………………………………………………………………………………………………·Letters·SteganographicTechniqueCapableofWithstandingRQPAnalysisWANGShuo Zhong ZHANGXin Peng ZHANG…  相似文献   

18.
INTRODUCTIONNitricoxide (NO) ,ashorthalf liferadical,ishighlyreactive ,andisinvolvedinmanybio logicalprocesses,Itseemstoplayanimporta  相似文献   

19.
PartⅠWordsworth ,aRomanticisttheoreti cianandpractitionerWordsworthisafamousBritishRomanticpoetwhobelongstotheLakeSchooloftheRomanticists,andoneoftheforerunnersof 1 9th centuryEnglishRomanticism .Heisnotonlyoneofthegreatesttheoreticiansinpoetry ,butalsoagr…  相似文献   

20.
1 Introduction Itisaneasytaskforexperiencedcytopathologiststoidentifycellsunderopticalmicroscopes,butitisverycomplicatedforcomputertocarryonthesamemissionautomatically.Oneofthemajorreasonsisthevariousparametersandfeaturesofcellsthatoftenoverlapwithe…  相似文献   

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