简介:Theneedforwide-bandclockanddatarecovery(CDR)circuitsisdiscussed.A2Gbpsto12Gbpscontinuous-rateCDRcircuitemployingamulti-modevoltage-controloscillator(VCO),afrequencydetector,andaphasedetector(FD&PD)isdescribed.Anewautomaticfrequencybandselection(FBS)withoutexternalreferenceclockisproposedtoselecttheappropriatemodeandalsosolvetheinstabilityproblemwhenthecircuitispoweringon.Themulti-modeVCOandFD/PDcircuitswhichcanoperateatfull-rateandhalf-ratemodesfacilitateCDRwithsixoperationmodes.TheproposedCDRstructurehasbeenmodeledwithMATLABandthesimulatedresultsvalidateitsfeasibility.
简介:Itisrevealedthatthedynamicstabilityof2-Drecursivecontinuous-discretesystemswithintervalparametersinvolvestheproblemofrobustHurwitz-Schurstabilityofbivariatepolynomialsfamily.ItisprovedthattheHurwitz-Schurstabilityofthedenominatorpolynomialsofthesystemsisnecessaryandsufficientfortheasymptoticstabilityofthe2-Dhybridsystems.The2-Dhybridtransformation,i.e.2-DLaplace-Ztransformation,hasbeenproposedtosolvethestabilityanalysisofthe2-Dcontinuous-discretesystems,togetthe2-Dhybridtransferfunctionsofthesystems.TheedgetestfortheHurwitz-Schurstabilityofintervalbivariatepolynomialsisintroduced.TheHurwitz-Schurstabilityoftheintervalfamilyof2-Dpolynomialscanbeguaranteedbythestabilityofitsfiniteedgepolynomialsofthefamily.Analgorithmaboutthestabilitytestofedgepolynomialsisgiven.
简介:Inthiswork,Bi2Te3films(250nm)arefabricatedonSiO2/Sisubstratesbyradiofrequency(RF)magnetronsputteringatroomtemperature,andthepreparedfilmsareannealedoverthetemperaturerangeof200°Cto400°C.Crystallinityandelectricalpropertiesofthefilmscanbetunedcorrespondingly.ThepowerfactorsofBi2Te3filmsof0.85μW/K2cmto11.43μW/K2cmwereachievedafterannealing.Theinfraredreflectancemeasurementsfrom2.5μmto5.0μmdemonstratethatthereisalsoaslightred-shiftoftheplasmaoscillationfrequencyintheBi2Te3films.Bymeansofplasmoniccalculations,weattributethered-shiftofabsorptionpeakstothereductionofcarrierconcentrationandthechangeofeffectivemassofBi2Te3filmswiththeincreasedannealingtemperature.
简介:ThephysicalandelectricalpropertiesofBF2+implantedpolysiliconfilmssubjectedtorapidthermalannealing(RTA)arepresented.ItisfoundthattheoutdiffusionofFanditssegregationatpolysilicon/siliconoxideinterfaceduringRTAarethemajorcausesofFanomalousmigration.FluorinebubbleswereobservedinBF2+implantedsamplesatdosesof1×1015and5×1015cm-2afterRTA.
简介:我们认识到NiCo2由激光照耀的O4nanomaterialsNiCo2有不同集中的O4暂停。结果表明同样准备的样品是有568nm和优异dispersity的最大的平均尺寸的需要的范围,它在0.30JDS的精力密度被获得)。Obwohl死ErkrankungenvieleGemeinsamkeitenaufweisen(Fiebersch浭湥慦獳湵?浉畭歮浯牰浯瑩楴牥湵?楢杲?浩敭?楥?牥???獥删獩歩????釧????????闧?郦????駥?釧?闦??駥?跧???闦?臧?臧????駥膹?郦?飧?蓦???釧?釧?蓦???跧?觧??跧?????觧?釧??闦??闦?觧?郧?闦???跧???釧????触?跧??趥觧?鷦??
简介:Monodispersed硅石有353nm的直径的微范围是在乙醇的装配intophotonic水晶在借助于可控制的垂直免职方法的不同温度和湿度的改变的硅石体积部分的胶体的暂停。表面形态学和光性质被SEM和UV-Vis-NIR学习。这被发现high-qualitysilica胶体的photonic晶体与在45℃和55℃之间的环境温度从乙醇答案被获得,在66%和76%之间的湿度,微范围的体积部分是between0.8%并且1.5%。可控制的垂直免职方法制作的订的拥挤不堪的photonic水晶在可见轻乐队和近红外线的乐队有二photonic乐队差距。
简介:AmeasurementsystemwiththeCCDmatrixandcomputersystemisdesignedtotestthe2Dsizeofanyshapeworkpiecesautomatically.Inaddition,thesystemadoptsthemethodoftherelativemeasurementwhichincreasestheprecisionandthevelocity.Moreimportantly,theprecisioncan'tbechangedwiththeconditionsofthetemperatureandairpressure.Theexperimentsshowthattherelativeprecisionof0.0029andtheabsoluteprecisionof2.97μmareobtained.Theinstrumentmaybeusedintheproductlineandmakethetestingonlinepossible.
简介:Apeer-to-peer(P2P)networkisadistributedapplicationarchitecturewhichprovidesmanyattractivefeatures,suchasavailability,self-organization,load-balancing,andanonymity.However,P2Pnetworkhascreatedsignificantproblemstonetworkoperatorsbygeneratinglargevolumesofinterautonomoussystem(inter-AS)traffic.FocusingontheBitTorrentswarmingprotocol,thispaperproposesanapproachwhichaimstoreduceP2Pgeneratedinter-AStraffic.Inparticular,theapproachcanreduceinter-AStrafficby50%to70%.Moreover,itcanimprovethedownloadingspeedby60%forthepopulartorrents.Theevaluationshowsthatcontrolledregional-basedcontentsreplicationcaneffectivelyachievethisgoal.Furthermore,theapproachisincrementallydeployable.NetworkregionsinwhichthesystemgetsdeployedcansolvetheirP2Pgeneratedinter-AStrafficproblemsautonomously,i.e.,withoutanyInternetserviceproviders-collaborationandanyrequirement,thesystemcanbedeployedintheentireInternet.
简介:Inexperimentalstudyofthetindioxidegassensor,insitusheetconductivitywasmeasuredwithultrahighvacuumfourpointresistivityprobe.Surfacecompositionandstoi-chiometryweredetectedusingXPS.FourseparatestructurephaseswereobtainedbyLEEDatdifferentannealingtemperature,andemissionwasobservedthroughoutthebandgapuptotheFermilevelwithUPS.Furthermore,effectsofannealingtemperatureanddosedoxygenpressureonthesurfacereconstruction,O/Snratio,sheetconductivity,variationoftheworkfunctionandbandbendinghavebeenalsoinvestigated.Theresultshelpustorevealtherelationshipsbetweentheelectronicandelectricalpropertiesofthematerialanditsnativedefectsstructure.Itises-peciallyusefultoprovideamorecompleteunderstandingofthebasicoperationmechanismsforsuchsensingmaterials.
简介:WereportthedepositionofNb2O5filmsonunheatedBK-7glasssubstratesusingremoteplasmasputteringsystem.Theremoteplasmageometryallowspseudoseparationofplasmaandtargetbiasparameters,whichofferscompletedepositionratecontrol.Usingappropriateoxygenflowrates,high-densityandlow-lossNb2O5filmsaredepositedwithratesupto0.49nm/s.Lowerdepositionrates(~0.026nm/s)canalsobeobtainedbyworkingatlowtargetcurrentandvoltageandatlowpressure.Nb2O5filmsdepositedatdifferentrateshavetherefractiveindexofabout2.3andtheextinctioncoefficientaslowas6.9×10-5.
简介:Thestructureoftheopticalwaveguideof2-bitelectroopticA/Dconverterwithproton-exchangemicroprismsisoptimizedbythefinite-differencebeampropagationmethod(FD-BPM).Theelectrodeparametersoftheconverterareoptimizedbyconformalmapping.Theoptimalparametersareahalf-wavevoltageofVπ=4.5VandabandwidthofΔf=1.4GHz.Anormalizedtransmittedpowerof69.75%isobtainedbyFD-BMPandtheoutputwaveguidegapis300μm.
简介:A2D-directionofarrivalestimation(DOAE)formultiinputandmulti-output(MIMO)radarusingimprovedmultipletemporal-spatialsubspacesinestimatingsignalparametersviarotationalinvariancetechniquesmethod(TS-ESPRIT)isintroduced.InordertorealizetheimprovedTS-ESPRIT,theproposedalgorithmdividestheplanararrayintomultipleuniformsub-planararrayswithcommonreferencepointtogetaunifiedphaseshiftsmeasurementpointforallsub-arrays.TheTS-ESPRITisappliedtoeachsub-arrayseparately,andinthesametimewiththeotherstorealizetheparallellytemporalandspatialprocessing,sothatitreducesthenon-linearityeffectofmodelanddecreasesthecomputationaltime.Then,thetimedifferenceofarrival(TDOA)techniqueisappliedtocombinethemultiplesub-arraysinordertoformtheimprovedTS-ESPRIT.Itisfoundthattheproposedmethodachieveshighaccuracyatalowsignaltonoiseratio(SNR)withlowcomputationalcomplexity,leadingtoenhancementoftheestimatorsperformance.