简介:Anin-depthexplorationhasbeenmadeoftelecommunicationtariffanditsdecisionsupportsystem.Itisthefirstattempttoconductsuchastudybytheintegrateduseofeconometrics,systememulationandsystemdynamics.Apractically-demandedcostmodelofthetelecommunicationtariffdecisionisproposed.Thesystemhasbeenverifiedwithrealdata.
简介:Thepricingoftelecommunicationservicesisquiteimportantaswellascomplicated.ThispaperstrengthenstheresearchoftheoriesandimplementationoftelecommunicationtariffinChina.Itishelpfulforthegovernmentauthoritiesandenterprisestounifyandstandardizetheregulatorymethods,toguidethedecidingofthestructureandleveloftelecommunicationtariffbyimplementingscientifictheories,tofurtherdevelopandoptimizethetariffsystem.Thispaperconductsasystematic,in-depthandcreativeresearchonsomeofthemostpopularandmostdifficultproblemsintheareaoftelecommunicationtariffresearch,suchastheregulationoftelecommunicationtariff,thetheoriesoftelecommunicationtariff,thesystematicpricingtheory,theinterconnectioncharge,themodelcostevaluationtheory,thelong-runincrementalcosttheory,andtheinternationaltelecommunicationtariff.Afterstudyingtheforeignmethodsontelecommunicationtariffregulation,basingonthecurrentsituationofChina'stariffregulation,thescopeandmethodsforChina'stelecommunicationtariffregulationaresuggested.Aimedattheweaknessofpricingtheoryforenterprisestosetuptelecommunicationtariffs,anoverallframeworkoftelecommunicationtarifftheoriesisproposed.Thesystematicpricingtheoryandmodelcostevaluationtheoryoftelecommunicationservicesareputforwardfromabrandnewperspective.Afronttopic,theLRICtheory,isprobed.Inaddition,thepricingpracticesofnetworkinterconnectionchargeandinternationaltelecommunicationtariff,whicharecurrentlyveryattractivetothetheorists,arediscussed.Basingonthesestudies,thispaperimprovesthestructureoftelecommunicationtarifftheory.ItprovidestheChinesegovernmentauthoritieswithpracticalmethodsandhelpfulsupportstoregulatethetelecommunicationtariffs;inthemeantime,italsoprovidestheenterpriseswithscientificpricingtheoriesandmethodstosetuptelecommunicationtariffs.Overall,thispaperhasnot
简介:Thequantumtheoryapplicationisahotresearchareainrecentyears,especiallythetheoryofquantummechanics.Inthispaper,wefocusontheresearchofimagesegmentationbasedonquantummechanics.Firstly,thetheoryofquantummechanicsisintroduced;afterwards,areviewofimagesegmentationmethodsbasedonquantummechanicsispresented;andfinally,thecharacteristicsaboutthequantummechanicsappliedtoimageprocessingareconcluded.Twomainresearchtopicsarediscussedinthispaper.Oneistoemphasizethatquantummechanicscanbeappliedindifferentresearchareas,suchasimagesegmentation,andthesecondistoconcludesomemethodsinimagesegmentationandgivesomesuggestionsforpossiblenovelmethodsbyapplyingquantummechanicstheory.Asasummary,thisisareviewpaperwhichpresentssomemethodsbasedonthefeasibletheoryinquantummechanicsaimingatachievingabetterperformanceinimagesegmentation.
简介:Indownlinkcoordinatedmulti-point(CoMP)system,fullcooperationisalwaysnotapplicableinrealworldbecauseofitshighrequestinthebackhaul.Todealwiththisproblem,clusteringdecisionismadetoprocesstransmission.Inthispaperclusteringmethodsbasedonthemetricsignal-to-leakage-plus-noise(SLNR)isproposed.Inaddition,userschedulingschemesbasedonSLNRisalsoputuptomaketheschedulingsetaslargeaspossible.Simulationresultsshowthattheproposedclusteringmethodsnotonlyreducethedatasharingamongthecooperatingbasestations(BSs),butalsoimprovethesystemthroughputcomparedwiththetraditionalclusteringmethodsbasedonchannelstrength.
简介:Theeffectofsystemmismatchesonanadaptivelinearconstrainedgeneralizedsidelobecanceller(LC-GSC)isdiscussedinthispaper.Basedonthearraygainindex,twoclassicsystemmismatches,thedirectionofarrival(DOA)mismatchandthemismatchesarisingfromarraydisturbance,arestudied,respectively.Toobtaintheeffectivemethodsforcompensatingforthesystemmismatches,weanalyzetheperformanceoftheimprovedLC-GSCwiththediagonalloadingandadditionalconstraints(suchasthedirectionalconstraintsandderivativeconstraints).Thecomputersimulationsshowthatthetechniquesofdiagonalloadingandadditionalconstraintscaneffectivelycompensateforthesystemmismatches.Thelossofarraygainscanbecontrolledwithin3dBinthepresenceof20%ofarraydisturbancesorDOAmismatchwhenthesignal-to-noiseratioislessthan10dB.Theanalysisillustratesthattheproposedcompensationmethodsarevalidandfeasible.
简介:Twomethodsforimprovingtheequidrivingpower-frequencycharacteristicsofbroad-bandhighpowerklystronsarepresented.Oneisthatacomb-linebandpassfilterwithsomeattenuationpropertiesisinsertedbetweentheTWTdriverandtheklystronforcompensatingthegain-frequencycharacteristicsoftheklystrontogettherequiredequidrivingpower-frequencycharacteristics.Theotheristhatareactiveelementisconnectedwiththeinputcavitytochangeitsresonancefrequenciesf0andQL,andthustoimprovethepower-frequencycharacteristicsoftheklystron.
简介:Aclassofmodifiedparallelcombinedmethodsofreal-timenumericalsimulationarepresentedforastiffdynamicsystem.Bycombiningtheparallelismacrossthesystemwiththeparallelismacrossthemethod,andrelaxingthedependenceofstagevaluecomputationonsamplingtimeofinputfunction,aclassofmodifiedreal-timeparallelcombinedmethodsareconstructed.StiffandnonstiffsubsystemsaresolvedinparallelonaparallelcomputerbyaparallelRosenbrockmethodandaparallelRKmethod,respectively.Theirorderconditionsandconvergencesarediscussed.Thenumericalsimulationexperimentsshowthatthisclassofmodifiedalgorithmscangethighspeedandefficiency.
简介:Themeanshifttrackerhasdifficultyintrackingfastmovingtargetsandsuffersfromtrackingerroraccumulationproblem.Toovercomethelimitationsofthemeanshiftmethod,anewapproachisproposedbyintegratingthemeanshiftalgorithmandframe-differencemethods.Theroughpositionofthemovingtargetisfirstlocatedbythedirectframe-differencealgorithmandthree-frame-differencealgorithmfortheimmobilecamerascenesandmobilecamerascenes,respectively.Then,themeanshiftalgorithmisusedtoachieveprecisetrackingofthetarget.Severaltrackingexperimentsshowthattheproposedmethodcaneffectivelytrackfirstmovingtargetsandovercomethetrackingerroraccumulationproblem.