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1.
IntroductdonInthefirstpart ,wehavediscussedtheopiticalaspectsaboutthequantumwellinfraredphotodetec tor .Herewecontinuediscussionsabouttheelectricalaspectesofthedevicemodelandsimulation .1 DarkCurrentandPhotocurrentDistributedeffectsofexternalbiasacrossth…  相似文献   

2.
IntroductionMostofmodernHg1-xCdxTeternarycompoundIRphotodetectorsaremanufacturedfromLPEfilmsgrownonCdTeandCdZnTesubstrates[1~ 4 ] .Compo sitionaldepthnonuniformityseemstobeaninherentfeatureofthesefilms[5,6 ] .Itcausesthevariationsofband gapwiththedepth ,thusaff…  相似文献   

3.
IntroductionInfrareddetectortechniquehasbeenakeyfactorinthedevelopmentoftheinfraredtechnologyformorethan 4 0 years .Since 1970 ,semiconductorslikeInSbandHgCdTehavebeentheprincipalmaterialsforvariousinfrareddetectorapplications .Theformatoftheinfrareddetectormotivatedbysmartthermalimagingsystemchangedfromsingleelementdevicetofocalplanarrays(FPAs)inthemiddleof 80’s [1].Today’stechnologyofinfrareddetectorconcentrateslargelyonfocalplanarrays ,expeciallyforsensitive ,homogeneousandlargeformatscaledevices .HgCdTe...  相似文献   

4.
1 IntroductionTheproblemofusinganantennaarraytoesti matethetimedelaysisimportantinthewirelesscommunicationsystem .Insuchasystem ,multipathtransmissionphenomenonexistsandcancauseseveresignalfading .Estimationofthemultipathdelays,aswellasthespatialsignatur…  相似文献   

5.
1 Introduction  Assetsservicesaretheservicesthathandlefund .Financialorganizationsrealizebusinessopera tionbyturningthefundsabsorbedintoeconomicre sultsthroughassetsservices.Becauseofitsnetworkandcredit,thesavingsdepositabsorbedby postmustbehandledeffect…  相似文献   

6.
1IntroductionIndesktopvideoconferencingsystems,therearetwokindsofdata:continuousmediastreamanduser′sdatathatneedtobetransmite...  相似文献   

7.
1 IntroductionThereiscurrentlyasignificantinterestinthedesignofhigh ratewirelessCodeDivisionMultipleAccess (CDMA)networks[1 ,9~1 0 ] .InthisCDMAsystem ,eachuserisassignedauniquesignaturewaveformthatisusedtomodulateitstransmittedsymbols.Itis,however,notpossiblet…  相似文献   

8.
1 IntroductionTheexplosivegrowthofInternettraffichasim posedtremendousstressontoday srouters,howtoimplementhighspeed ,scalableandlargeprocessingcapabilitywhileprovidinggoodserviceshasbecomethekeyissuetodesignmodernrouterfacilities.La bel switchingtechnol…  相似文献   

9.
An Analysis and Design of the Virtual Simulation Software Based on Pattern   总被引:1,自引:0,他引:1  
1 IntroductionVegasystem ,asarenderingdrivensoftwareplatform ,hasbeenwidelyusedinsystemsimulationandvirtualreality .ItismainlyusedintheUNIXplatform .BecauseoftheeasyuseandapplicationneedoftheWindowsNT ,thesystemofVegahasalsobeentransplantedtoWindowsNTfrom…  相似文献   

10.
1 IntroductionTSPisoneofthemostdifficultproblemsthatmanyscholarsallovertheworldhavebeenstudyinguptonow .ThebasicdescriptionofthisproblemwhichwasproposedbyK .Mengerfirstlyis:Atrav ellingsalesmanwishestovisitanumberoftowns,thetravellingdistancesbetweentown…  相似文献   

11.
Thesensingmodelofdetectingsystemisusuallycomplicate(sometimescannotex-pressedmathematically).Thismakesitverydiffculttoobtainquicksolutionandrealtimedetecting.Thepapertakestheposewarpopticfibersensorofrobotscrewflexibleassemblyasanexample,andintroduce…  相似文献   

12.
1 IntroductionDisparityestimation ,namely ,stereomatching ,isthekeytostereovisionandstereoimagecompres sion .Fortheproblemofscenereconstructionusingstereoimages,theprecisionofestimateddisparitydeterminesthedegreeoftruthfulnessofreconstruct edobjects.Moreov…  相似文献   

13.
Softwareradio ,togetherwithdigitalradioasitsbasis,hasbeenthetrendstodevelopmentinwirelesscommunications.Digitalradiofocusesonall digitalizationtechniquesandmodularizationmethodsincommunicationsystems,whilesoftwareradiopaysmoreattentiontoall digialtizedr…  相似文献   

14.
1 IntroductionMultipleaccessinginthecodedomainisachievedbyspreadingthespectrumofthetransmit tedsignalsusingpreassignedcodeinformation .Sinceitisnotpossibletodesignsignaturesequenceforanypairofusersthatareideallyorthogonal,theinter ferencefromtheotheruse…  相似文献   

15.
Wen  Ruimei 《半导体学报》1998,19(12):945-950
Itiswelknownthatreverseosmosis(RO)isapressure-drivenprocessofwaterflowingacrossasemipermeablemembranefromthesolu...  相似文献   

16.
1 IntroductionAsisknown ,therearevarioussystemsoffuzzylogic[1~2 ] .ThemostpopularoneisbasedonZadeh’sfuzzysetoperators.ThereafterwewilldenotethissystemasZadeh’sFuzzyLogic(ZFL) .Anewsys temwas proposed[3~ 5] whichiscalledMeasure BasedFuzzyLogic(MBFL) .Itisfoundedont…  相似文献   

17.
1 IntroductionMultiple AccessInterference (MAI)owingtomanysimultaneoususersconstitutesthemainlimita tionofDS CDMAsystems .MultiuserdetectiontechniquescanefficientlysuppressMAIandsub stantiallyincreasethecapacityofCDMAsystems.Variousmultiuserdetectionschem…  相似文献   

18.
1 IntroductionWhenarouterforwardsapacketinconvention alnetworks,itonlyusesfewsystemresources ,forexample,ituseslittlememoryresourcestotem porarilystorethispacketandfewCPUresourcestosearchforwardingrouteandprocessIPoptionpa rameters.Comparedtoconventional…  相似文献   

19.
1 IntroductionMultiresolutionsignalprocessingisbecomingmorepopularincommunicationandinformationpro cessingfieldsbecauseofitsfineproperty ,especiallyinimagecoding .Itsplitsasignalintoseveralsub bandsignalswithdifferentbandwidthstoutilizethecharacterdiffe…  相似文献   

20.
IntroductionElectronback scatteredpattern (EBSP)analysisinthescanningelectronmicroscopeasatoolforinvestigatingmicrostructurehasbeenwellestablished .Thistechniquehasmanyadvantagesovertransmissionelectronmicroscopy .Adrawbackofthistechniqueistheangularreso…  相似文献   

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