简介:Plasmonicwaveguides,asacompetitivecandidate,havebeenwidelystudiedinrapiddevelopingphotonicintegratedcircuits(PICs)andopticalinterconnectionfields.However,crosstalkbetweenplasmonicwaveguidesisacriticalissuethathastobeconsideredinpractice.Actually,crosstalkdominatestheultimateintegrationdensityoftheplanarphotoniccircuits.Thispaperreviewstherecentresearchworkonevaluationmethodsandcrosstalksuppressionapproachesofplasmonicwaveguides.Threecrosstalkevaluationmethodsbasedoncomparisonofspecificparametersofwaveguideshavebeensummarized.Furthermore,fourspecificapproachestoreducecrosstalkhavebeenillustratedastwocategoriesaccordingtotheirimpactsonwaveguideperformancesandthewholecircuit.Onemeansofcrosstalksuppressionischangingtheplacementofwaveguides,whichcouldmaintainthetransmissioncharacteristicsoftheoriginalwaveguide.Theothermeansisinsertingmedium,whichhastheadvantageofoccupyingsmallerspacecomparedtothefirstmethod.Consequently,tosuppresscrosstalkbetweenplasmonicwaveguides,oneshouldchoosesuitableapproach.
简介:ThearticlebrieflyintroducesthethreestagesthatChinaPostexperiencedandthecircumstancesofthefundamentalnetworkconstruction,focusingonintroducingthethreesortsofservicesbasedonpostalcomprehensivecomputernetwork'sapplicablesoftwaresystem:postalfinancialservice;traditionalserviceelectrified;electronicpostalservice.FinallythethinkingforfutureChinaPost'sinformationizingconstructingisputforward.
简介:Bybenefitingfromthedevelopmentofthesemiconductortechnology,many-coresystem-on-chips(SoCs)havebeenwidelyusedinelectronicdevices.Network-on-chips(NoCs)canaddressthemassivestressofon-chipcommunicationsduetotheadvantagesofhighbandwidth,lowlatency,andgoodflexibility.Sincedeepsub-micronera,thereliabilityhasbecomeacriticalconstraintforintegratedcircuits.Toprovidecorrectdatatransmission,faulttolerantNoCshavebeenresearchedwidelyinlastdecades,andmanyvaluabledesignshavebeenproposed.Thisworkintroducesandsummarizesthestate-of-the-arttechnologiesforfaultdiagnosisandfaultrecoveryinfaulttolerantNoCs.Moreover,thisworkmakesprospectsforthefuture'sresearch.
简介:Thequantumtheoryapplicationisahotresearchareainrecentyears,especiallythetheoryofquantummechanics.Inthispaper,wefocusontheresearchofimagesegmentationbasedonquantummechanics.Firstly,thetheoryofquantummechanicsisintroduced;afterwards,areviewofimagesegmentationmethodsbasedonquantummechanicsispresented;andfinally,thecharacteristicsaboutthequantummechanicsappliedtoimageprocessingareconcluded.Twomainresearchtopicsarediscussedinthispaper.Oneistoemphasizethatquantummechanicscanbeappliedindifferentresearchareas,suchasimagesegmentation,andthesecondistoconcludesomemethodsinimagesegmentationandgivesomesuggestionsforpossiblenovelmethodsbyapplyingquantummechanicstheory.Asasummary,thisisareviewpaperwhichpresentssomemethodsbasedonthefeasibletheoryinquantummechanicsaimingatachievingabetterperformanceinimagesegmentation.
简介:Areviewontheprogressofpowerful2μmsilicafibersourcesinpastdecadesispresented.Wereviewthestate-of-the-artrecordsandrepresentativeachievementsof2μmhigh-average-powercontinuouswave,pulsedfiberlasersandamplifiers,andpowerfulsuperfluorescentsources.Challengeswhichlimitthefurtherpowerscalingof2μmsilicafibersourcesarediscussed,includingpumpingbrightnesslimitation,thermalproblem,andnonlineareffects.Potentialandpromisingroadmapstogobeyondtheselimitations,liketandempumpingandbeamcombining,arediscussed.Prospectsofpowerful2μmsilicafibersourcesarealsopresentedintheendofpaper.
简介:Inthemodernanaloguedesign,TransistorLevelFaultSimulation(TLFS)playstheim-portantpartsinceeveryfaultinthewholecircuithastobesimulatedatthatlevel.Unfortunately,itisaveryCPUintensivetaskeventhoughitmaintainsthehighaccuracy.Therefore,HighLevelFaultModeling(HLFM)andHighLevelFaultSimulation(HLFS)arerequiredinordertoalleviatetheeffortsofsimulation.Inthispaper,differentHLFMapproachesarereviewedatthedevicelevelduringlasttwodecades.Weclarifytheirdomainsofapplicationandevaluatetheirstrengthsandcurrentlimitations.Wealsoanalyzecausesoffaultsandintroducevarioustestapproaches.
简介:AnewlygrownBaGa4Se7crystalhasbeensynthesizedviatheBridgman-Stockbargertechnique.Thisnewcrystalhasadvantagesofhighnonlinearoptics(NLO)coefficients,highlaserdamagethresholds,andwidetransparentregions.TheBaGa4Se7crystalhasbrightapplicationprospectsasanonlineargainmediuminmid-infraredandterahertzregions.Inthispaper,thecrystallinestructureandsyntheticmethodoftheBaGa4Se7crystalareintroduced.Therefractiveindicesandabsorptioncoefficientsalongthreedielectricaxesbetween0.1THzand1.0THzarealsoobtained.Theterahertzdifferencefrequencygeneration(THz-DFG)characteristicsbasedontheBaGa4Se7crystalinthefrequencyrangeof0.1THzto1.0THzareanalyzedtheoreticallyandthephase-matchingconditionsarecalculated.TheapplicationofBaGa4Se7crystalsinterahertzwavegenerationisalsodiscussed.