简介:ArtisticValue:YunZhongJunandDaSitilingwascreatedin1954.FuBaoshistartedpaintingfiguresafterhisrelocationtoSichuanProvinceinthe1930SlHewaslessprolificinthisgenrethaninlandscapes,butneverthelessdevelopedandretainedadistinctivestyle,ExtensivelyculturedinChinesehistoryanddassicaliterature,
简介:Thispaperaddressesamaster-slavesynchronizationstrategyforcomplexdynamicsystemsbasedonfeedbackcontrol.Thisstrategyisappliedto3-DOFplanarmanipulatorsinordertoobtainsynchronizationinsuchcomplicatedaschaoticmotionsofend-effectors.AchaoticcurveisselectedfromDuffingequationasthetrajectoryofmasterend-effectorandapiecewiseapproximationmethodisproposedtoaccuratelyrepresentthischaotictrajectoryofend-effectors.Thedynamicalequationsofmaster-slavemanipulatorswithsynchronizationcontrollerarederived,andtheLyapunovstabilitytheoryisusedtodeterminethestabilityofthiscontrolledsynchronizationsystem.Innumericalexperiments,thesynchronousmotionsofend-effectorsaswellasthreejointanglesandtorquesofmaster-slavemanipulatorsarestudiedunderthecontroloftheproposedsynchronizationstrategy.Itisfoundthatthepositivegainmatrixaffectstheimplementationofsynchronizationcontrolstrategy.Thissynchronizationcontrolstrategyprovesthesynchronization'sfeasibilityandcontrollabilityforcomplicatedmotionsgeneratedbymaster-slavemanipulators.
简介:Thispapersolvesthenewlyconstructednonlinearmasterequationdρ/dt=κ[2f(N)aρ(1/f(N-1))a+-a+aρ-ρa+a],wheref(N)isanoperator-valuedfunctionofN=a+a,fordescribingamplitudedampingchannel,andderivestheinfiniteoperatorsumrepresentationofquasi-Krausoperatorsforthedensityoperator.Italsoshowsthatinthisnonlinearprocesstheinitialpurenumberstatedensityoperatorwillevolveintothebinomialfield(amixedstate)whenf(N)=1/(N+1)~(1/2).
简介:ThroughacomparisonbetweentheexpressionsofmasterbalancelawsandtheconservationlawsderivedbyNoether'stheorem,aunifiedmasterbalancelawandsixphysicallypossiblebalanceequationsformicropolarcontinuummechanicsarenaturallydeduced.Amongthem,byextendingthewell-knownconventionalconceptofenergymomentumtensor,therathergeneralconservationlawsandbalanceequationsnamedafterenergy-momentum,energy-angularmomentumandenergy-energyareobtained.Itisclearthattheformsofthephysicalfieldquantitiesinthemasterbalancelawforthelastthreecasescouldnotbeassumeddirectlybyperceivingthroughtheintuition.Finally,someexistingresultsarereducedimmediatelyasspecialcases.