简介：InvehicleAd-hocnetwok(VANET),trafficloadisoftenunevenlydistributedamongaccesspoints(APs).Suchloadimbalancehampersthenetworkfromfullyutilizingthenetworkcapacity.Toalleviatesuchimbalance,thepaperintroducesanovelpricinggamemodel.Theresearchsceneisattheintersectionwhenthetrafficlightisgreen.Asvehiclesarehighlymobileandthenetworktypologychangesdynamically,thepaperdividesthegreenlighttimeintoequalslotsandcalculatesAPs'priceswiththepresentedpricinggameineachtimeslot.Thewholeprocessisarepeatedgamemodel.ThefinalequilibriumsolutionsetisAPs'pricingstrategy,andthepaperclaimthatthisequilibriumsolutionsetcanaffectvehicles'selectionandensureAPs'load-balancing.Simulationresultsbasedonarealisticvehiculartrafficmodeldemonstratetheeffectivenessofthegamemethod.

简介：Doubledataratesynchronousdynamicrandomaccessmemory(DDR3)hasbecomeoneofthemostmainstreamapplicationsincurrentserverandcomputersystems.Inordertoquicklysetupasystem-levelsignalintegrity(SI)simulationflowfortheDDR3interface,twosystem-levelSIsimulationmethodologies,whichareboard-levelS-parameterextractioninthefrequency-domainandsystem-levelsimulationassumptionsinthetimedomain,areintroducedinthispaper.BycomparingtheflowofSpeed2000andPowerSI/Hspice,PowerSIischosenfortheprintedcircuitboard(PCB)board-levelS-parameterextraction,whileTektronixoscilloscope(TDS7404)isusedfortheDDR3waveformmeasurement.Thelabmeasurementshowsgoodagreementbetweensimulationandmeasurement.ThestudyshowsthatthecombinationofPowerSIandHspiceisrecommendedforquicksystem-levelDDR3SIsimulation.

简介：Ahigh-precisionwavelengthcontrollerispresentedinthispaper.ItisnecessarytofindoutthedifferencebetweenthecentralwavelengthofatunablefiberFabry-Perot(FFP)filterandthatoftheinputlaser,whilethewavelengthcontrol-leroperatesatthestatesofwavelength-scanningandwavelength-lockingmodes.Firstly,adynamicsimulationmodeloftunableFFPfilterisestablished,andthedynamiccharacteristicoftunableFFPfiltermodulatedbyanalternatingcurrent(AC)signalissimulated.Thenthemeasuringtimeatwavelength-scanningmodecomparedwiththetheorytimeisdiscussed,andthistimedifferenceshowsthedifferencebetweenthecentralwavelengthofatunableFFPfilterandthatoftheinputlaser.Atlast,theeffectsonwavelength-lockingprecisionoftimedelays,includingthetimedelayofopened-loopcircuit,thetimeconstantoftheclosed-loopcircuitandtheintrinsichysteresisofpiezoelectric(PZT)element,areanalyzed.AwavelengthcontrolleroftunableFFPfilterisdesignedandprepared.Theexperimentalresultsatwavelength-lockingmodeshowthatahighlockingprecisionisobtained.