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1.
在[1]的基础上研究了t个PBIB设计的Descartes积所构成的PBIB设计的矩阵与其因子设计的矩阵的关系.得出积设计的关联矩阵、结合矩阵、阵都是它的因子设计的相应矩阵的Kronecker积  相似文献   

2.
0 INTRODUCTIONBack propagationAlgorithm (BP)isaveryusefulalgorithminmanyaspects.Butithasthefollowingproblems:①Thelocalleastprobleminevitableduetoitsnon linearoptimizingcharacteristic②Theslowconvergentspeed③Lackofacademicguidanceforthehiddennodes’numberch…  相似文献   

3.
1 SYNOPSISTOSTATEMONITORINGANDFAULTDIAGNOSISDEVICEOFHOMO AXLECATALYSISCHIEFBLOWERGROUPThispaperfocusesonrecallingaccidentsystem .Be causeitisapartofthewholedevice ,wegiveabriefin troductiontothedevicefirst .ThesaiddeviceisshownasFig .1wherethethickframessh…  相似文献   

4.
1 INTRODUCTIONPress/sinter (P/M )isacommonlyusedtechnologyforfabricationofpowdermetallurgy31 6Lstainlesssteel.Yet,theas sinteredden sityisabout 90 %oftheoreticaldensitywithlowmechanicalproperties.SomeresearchersstudiedaddingelementslikeB ,P ,Si,Cu ,Al,etc .toformlo…  相似文献   

5.
ORGANIC-INORGANICBIO-COMPOSITEAsBONESUBSTITUTERuanJianmin(PowderMetalurgyResearchInstitute,CentralSouthUniversityofTechnolog...  相似文献   

6.
0 INTRODUCTIONPlasma basedionimplantation (PBII)ofnitrogenisreportedtobeaverycost effectivetechniqueforsurfacemodificationofTi 6Al 4Valloy[1~ 4 ] .Futureworkremainstoconcentrateondeterminingtheexactmechanismofthetechniquewhenappliedtothealloy[2 ] .Forconventiona…  相似文献   

7.
在常微分方程组及其稳定性理论、控制论、线性统计等领域中会涉及到下列类型的线性矩阵方程X-AXBT=C。当该矩阵方程满足相容性条件时,可利用矩阵的Kronecker积把它化为线性方程组(II-AB)X=C,再利用矩阵的Jordan分解式和分块矩阵的广义逆理论给出该矩阵方程的一般解。  相似文献   

8.
0 INTRODUCTIONBecauseoftheirownshortages ,thepresentsheetmetalformingprocesses ,suchasrubberorpolyurethaneforming ,hydroformingorsuperplasticforming ,havecertainservicerestrictions.Thechar acteristicsthatVPFdiffersfromtheabovementionedforming processesisin…  相似文献   

9.
ONTHECARBONIFEROUS-PERMIANBOUNDARYZhangZuqi(DepartmentofGeology,CentralSouthUniversityofTechnology,Changsha410083,China)Abstr...  相似文献   

10.
0 INTRODUCTIONThesimulationofhumaninthedistributedvirtualenvironmentisdifferentfromthesimulationofthevehi cle .Becausethemotionpartsofthevehiclearelimitedandarebigger,theyareeasilysuitedtotheterrain .Butthehumanissmallerandhasthecharacteristicofmanyjoin…  相似文献   

11.
本文介绍了利用VisualBasic开发Windows多媒体应用软件的两种基本方法。一是利用VB的MCI控制图对象或Windows的MCI指令;另一是利用VB提供的调用WindowsAPI函数的功能。文中介绍了这些方法的基本概念,设计过程和实例。通过使用这些设计手段,用户可以很方便地设计出控制各种多媒体设备的程序。  相似文献   

12.
本文介绍了利用Visual Basic开发Windows多媒体应用软件的两种基本方法。一是利用VB的MCI控制图对象或Windows的MCI指令;另一是利用VB提供的调用Windows API函数的功能。文中介绍了这些方法的基本概念,设计过程的实例。通过使用这些设计手段,用户可以很方便地设计出控制各种多媒体设备的程序。  相似文献   

13.
0 INTRODUCTIONTherule basedsystem(RBS)isanexpertsysteminwideuse ,anditcanrepresentthedomainknowledgecon venientlyandmodifytherulesintheknowledgebasefreely.However,difficultiesexperienceduringtheRBSdevelopment,particularlywhenacquiringknowledgefromhumanexp…  相似文献   

14.
0 INTRODUCTIONNowactivevibrationcontrolisanimportantbranchinthevibrationcontrolfield .Becauseofitsadvantage ,ac tivevibrationcontrolhasbeenpaidmoreandmoreimpor tanceinthefieldofdynamics ,engineeringandcontrol.Bufferinventedin 192 0sandcontrolledbyelectromagn…  相似文献   

15.
Ofthetraditionalprocessesofniobiumextraction ,thehydrofluoricaciddissolution solvent (MIBK ,TBPetc .)extractionprocessiswidelyutilized[1] .BecauseofspecialpropertiesofHF ,however ,thisprocessgivesrisetomanyseriousproblems ,forexample ,seriouscorrosionofproducti…  相似文献   

16.
0 INTRODUCTION  BasicpartofthenewcitieswascreatedinRus siainthemiddleoftheXIXcenturyintheFarEast .InthesecondhalfoftheXIXcenturythesystemsoftheset tlinganddefensivebelts ,roadswereformed ;manymili tarypostsandstanitsesturnintothecities ,theirmasterplanswer…  相似文献   

17.
0 INTRODUCTIONABC95arraycomputerisaparallelprocessingcomputercontaining16SIMDparallelprocessornodes.Ithasmanyadvancedfeatures,suchasRISCstructure,interlinkingtopologystructurewithstaticnetworkinterlinkingstructureanddynamicsharestorageinterlinkingstructu…  相似文献   

18.
0 INTRODUCTIONByvirtueoftheirlowdensity ,highstrength/weightratio ,highmodulusandhighcorrosionandfatigueresis tance ,Al Lialloyhasbeendevelopedasstructuremateri alforaircraftandspacecraft[1~ 3] .Butitisdifficultforconventionalheat treatmenttechnologytofurther…  相似文献   

19.
0 INTRODUCTIONTheproblemwasproposedin 2 0 0 0MathematicalContestinModeling (MCM )problemB .Basedonthestudyof 4colorproblem ,differentmodelsweredesigned .1 THEASSIGNMENTMODELEverytransmitter ,locatedatthecenterofeachhexagonwhoselengthissoveralargeplanar ,isassigne…  相似文献   

20.
1 INTRODUCTIONOncommon midpoint (CMP)andcommon shotpoint (CSP)gathers,seismictime distancecurvein (x,t)domaincanbeapproximatedashyperbo  相似文献   

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