共查询到20条相似文献,搜索用时 15 毫秒
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0 INTRODUCTIONFeaturerecognizingisplayinganincreasinglyim portantroleintheintegrationofCAD ,CAPPandCAM .IttakesinformationfromtherepresentationofapartandconvertsitintomachiningfeaturesthatareneededinCAPPandCAMsystemswhich generatethepart’smachining proce… 相似文献
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1 INTRODUCTIONOncommon midpoint (CMP)andcommon shotpoint (CSP)gathers,seismictime distancecurvein (x,t)domaincanbeapproximatedashyperbo 相似文献
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1 INTRODUCTIONThestandardchemicalmethodsforthedeter minationofsevenimpuritiesincobaltoxidein cludetwodifferentmethods (AASforCa ,AESforZn ,Ni,Fe ,Cu ,MnandPb) [1] .Onlyafewstudieshavebeenreportedforthedeterminationofimpuritiesinhigh puritycobaltoxide .Kujiraiand… 相似文献
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《哈尔滨工业大学学报(英文版)》2002,(4)
PapersNO .1HPSElectronicBallastBasedonCIC -CPPFCTechniqueWANGWei SUQin GAOGuoan 1RicemutationafterflowninspaceSUNYeqing WEILijun LIXiaoleetal 7MacroscopiccumulativefatiguedamageofmaterialundernonsymmetricalcycleGAIBingzheng 12Geologicalcharactersandpetr… 相似文献
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0 INTRODUCTIONForthe pastthirteenyears ,therehasbeenanimmenseinterestamongresearchersintheproblemsrelatedtomachinesimulationofhumanreading .Mostopticalcharacterrecognition (OCR)meth odsassumethatindividualcharacterscanbeisolated ,andsuchtechniques ,although… 相似文献
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杨应平 《武汉理工大学学报(材料科学英文版)》2002,17(4)
1 IntroductionManganeseperovskites ,suchasR1-yAyMnO3 (R =rare earthelement,A =divalentelement) ,areattractingconsiderabletheoreticandtechnologicalinterestsbyvirtueofthediscoveryofthecolossalmagnetoresistance(CMR) [1,2 ] .CMRiscausedbythecomplexnatureofin terplayof… 相似文献
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Improvement of M-U-O and K-P-W proxy signature schemes 总被引:11,自引:0,他引:11
0 INTRODUCTIONIn 1996 ,Mambo ,Usuda,andOkamoto[1,2 ] pro posedanewcategoryofsignatureschemecalledaproxysignature .Theproxysignatureschemeallowsadesignatedperson ,calledaproxysigner,tosignonbehalfofanorig inalsigner .Mambo[1] etalshow proxysignatureshouldhaveproperti… 相似文献
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《哈尔滨工业大学学报(英文版)》2000,(Z1)
0 INTRODUCTIONInDescriptiveGeometry&MechanicalDrawing ,thechapterof″CombinationObject″isalwaysdifficultforbothteachersandstudents .Thekeyproblemisthatitishardtodevelopspaceimaginingabilitiesinthestudents′minds.Teachershavetoexplainthecontentswithmanyvis… 相似文献
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1 INTRODUCTIONThehigh energyparticlephysicsexperimentsneeddetectors ,whichcanbeusedinhighradiationenvironment.Thesedetectorsrequir 相似文献
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0 INTRODUCTIONAl Mnseriesalloysascommercialoneshavelonghis tory .Thefirstcommercial 3XXXalloywasdevelopedin190 6andthemainalloyingelementsofthisalloyare 1.2 5w (B) %Mnand 0 .13w (B) %Cu .In 192 9,30 0 4alloywith 1w (B) %Mgelementcameintoindustrialuse .Overpasttwenty years ,3XXXser… 相似文献
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盖秉政 《哈尔滨工业大学学报(英文版)》2002,9(1)
0 INTRODUCTIONItiswellknownthatthefatiguedamagephe nomenonisahighlynon linearprocess .Consequent ly ,thelineardamagerule (LDR) proposedbyPalm grenandMinercannotperfectlydescribeit[1,2 ] .Ithasthereforebecometheimportantsubjectformanyinvestigatorsimprovinguponi… 相似文献
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0 INTRODUCTIONColloidchemistryisthesubjectsclosetoengi neeringprojectsandeasytobeintersectedwithothersubjects .Modernindustryandagricultureprovidecol loidchemistrywithagoodfield (forexamplepetro chemicalindustry ,painting ,printinganddying ,mineralseparatin… 相似文献
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曹珍富 《哈尔滨工业大学学报(英文版)》2001,8(2)
INTRODUCTIONLetNbethesetofpositiveintegers ,andletA ,B∈Nwithgcd (A ,B) =1andBsquarefree .Thediophan tineequationA2 x4 -By2 - 1,x ,y∈N ( 1)isakindofbasicandimportantquarticDiophantineequa tions[1] .In 1997,Cohn[2 ] andSunandYuan[3] provedrespectivelythatifA =1thentheonlypossibl… 相似文献
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0 INTRODUCTIONTheproblemwasproposedin 2 0 0 0MathematicalContestinModeling (MCM )problemB .Basedonthestudyof 4colorproblem ,differentmodelsweredesigned .1 THEASSIGNMENTMODELEverytransmitter ,locatedatthecenterofeachhexagonwhoselengthissoveralargeplanar ,isassigne… 相似文献
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0 INTRODUCTIONThefiniteelementmethod (FEM)hasbeenwidelyrecognizedforitsgeneralapplicability .TheFEMhasbe comeanefficientmethodforstructureanalysisandisalsothoughttobeoneoffuturedevelopmenttrendsforrein forcedconcrete (RC)design[1,2 ] .AlthoughRCobviouslydoesn… 相似文献
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0 INTRODUCTIONTheintegratedCAD/CAPP/CAMsystemhasbeenwidelyusedinpracticewithsignificanteconomicgainsinconventionalmanufacturingfield.AlthoughafairlyhighlevelofautomationhasbeenachievedinElectricalDischargeMachining(EDM)equipment,thedesignofEDMproduction… 相似文献
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LISontg-lin 《中南工业大学学报(英文版)》2003,10(1):1-6
1 INTRODUCTIONPress/sinter (P/M )isacommonlyusedtechnologyforfabricationofpowdermetallurgy31 6Lstainlesssteel.Yet,theas sinteredden sityisabout 90 %oftheoreticaldensitywithlowmechanicalproperties.SomeresearchersstudiedaddingelementslikeB ,P ,Si,Cu ,Al,etc .toformlo… 相似文献
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《中南工业大学学报(英文版)》2003,(1)
CentralSouthUniversity (CSU)isoneofChina′skeyuniversities ,whichisaffiliatedwiththeMi nistryofEducation .“JournalofCentralSouthUniversityofTechnology (EnglishEdition)” (ISSN 10 0 5 9784 ,CODENJCSTFT ,Quarterly)issponsoredbyCSU .Prof.ChenGuoda ,AcademicianofChineseAca… 相似文献
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《中南工业大学学报(英文版)》2000,(1)
CentralSouthUniversityofTechnology (CSUT)isoneofChina′skeyuniversities,whichisaffiliat edwiththeMinistryofEducation .“JournalofCentralSouthUniversityofTechnology (EnglishEdi tion)” (ISSN 10 0 5 9784,CODENJCSTFT)supportedbyCSUT ,willbeQuarterlyfromtheyearof2 0 0 0 .Pro… 相似文献
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《中南工业大学学报(英文版)》2001,(3)
CentralSouthUniversity (CSU)isoneofChina′skeyuniversities ,whichisaffiliatedwiththeMin istryofEducation .“JournalofCentralSouthUniversityofTechnology (EnglishEdition)” (ISSN10 0 5 9784 ,CODENJCSTFT ,Quarterly)issupportedbyCSU .Prof.ChenGuoda ,AcademicianofChineseAca… 相似文献