简介:Duetolowparametersensitivityforbalancedrealizations,balancedstructurebecomesagoodcandidateforanstatespaceadaptiveinfiniteimpluseresponse(MR)filter.Here,usingcoefficientsofthetransferfunctionastheadaptivefilteringparameters,abalancedadaptiveIIRfilteringalgorithmisproposedforoutput-errorminimization.ThealgorithmintheinternallybalancedrealizationguaranteesthattheadaptiveIIRfilteralwaysminimizestheratioofmaximum-to-minimumeigenvalueoftheGrammianmatricesattheeachiteration.Simulationresultsareprovidedtocorroboratetheproposedalgorithm.
简介:Thispaperproposesahybriddecoupledpowerflowmethodforbalancedpowerdistributionsystemswithdistributedgenerationsources.Themethodformulatesthepowerflowequationsinactivepowerandreactivepowerdecoupledformwithpolarcoordinates.Second-ordertermsareincludedintheactivepowermismatchiteration,andconstantJacobianandHessianmatricesareused.Ahybriddirectandindirectsolutiontechniqueisusedtoachieveefficiencyandrobustnessofthealgorithm.Activepowercorrectionissolvedbymeansofasparselowertriangularanduppertriangular(LU)decompositionalgorithmwithpartialpivoting,andthereactivepowercorrectionissolvedbymeansofrestartedgeneralizedminimalresidualalgorithmwithanincompleteLUpre-conditioner.Typicaldistributiongenerationmodelsanddistributionloadmodelsareincluded.Theimpactofzero-impedancebranchesisexplicitlymodeledthroughreconfiguringoftheadjacentbrancheswithimpedances.Numericalexamplesonasampledistributionsystemwithwidespreadphotovoltaicinstallationsaregiventodemonstratetheeffectivenessoftheproposedmethod.
简介:Inthisletter,atheoreticalmodelofradiation-balanceddoublecladfiberlaserispresented.ThecharacteristicofthelaserwithYbdopeddoublecladfiberisanalyzednumerically.Itisconcludedthathighoutputlaserpowercanbeobtainedbyselectingoutputcouplingmirrorwithlowerreflectivity,improvingYbdopedconcentrationandchoosingfiberlength.Thisresultcanhelpustodesignradiationbalancedfiberlaser.
简介:Theanalyticalexpressionofbiterrorprobabilityinabalanceddifferentialphase-shiftkeying(DPSK)opticalreceiverconsideringnonlinearphasenoiseandEDFAASEnoiseisgiven,whichisveryusefultoestimatetheperformanceofDPSKbalancedandunbalancedreceiverinopticalcommunicationsystem.Throughanalysis,ifonlynonlinearphasenoiseisconsidered,boththebalanceandunbalancedreceivershavethesameperformances.ButifaddingtheASEnoiseofEDFA,thebalancedreceiverisbetter.