Search results for "Synchronization"

showing 10 items of 248 documents

The chaotic Dadras–Momeni system: control and hyperchaotification

2015

In this paper a novel three-dimensional autonomous chaotic system, the so called Dadras-Momeni system, is considered and two different control techniques are employed to realize chaos control and chaos synchronization. Firstly, the optimal control of the chaotic system is discussed and an open loop feedback controller is proposed to stabilize the system states to one of the system equilibria, minimizing the cost function by virtue of the Pontryagin’s minimum principle. Then, an adaptive control law and an update rule for uncertain parameters, based on Lyapunov stability theory, are designed both to drive the system trajectories to an equilibrium or to realize a complete synchronization of t…

Lyapunov stabilityControl and OptimizationAdaptive controlApplied MathematicsSynchronization of chaosChaoticOpen-loop controllerOptimal control01 natural sciences010305 fluids & plasmasNonlinear Sciences::Chaotic DynamicsControl and Systems EngineeringControl theoryoptimal control synchronization Lyaponuv function Pontryagin minimum principle multi-scroll chaotic attractor hyperchaotic system0103 physical sciencesAttractor010301 acousticsMathematicsIMA Journal of Mathematical Control and Information
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Chaos synchronization for a class of chaotic systems via H<inf>∞</inf> control technique

2013

In this paper, the robust synchronization control for a class of chaotic systems is studied. Based on linear matrix inequality techniques and Lyapunov stability theory, a novel H∝ robust synchronization controller is designed for the possible application in real engineering. Finally, some numerical simulations are included to demonstrate the effectiveness of the proposed techniques.

Lyapunov stabilityLyapunov functionsymbols.namesakeComputer simulationRobustness (computer science)Control theorySynchronization of chaosLinear matrix inequalitysymbolsRobust controlSynchronizationMathematics2013 9th Asian Control Conference (ASCC)
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Chaos Synchronization Based on Unknown Input Proportional Multiple-Integral Fuzzy Observer

2013

Published version of an article in the journal: Abstract and Applied Analysis. Also available from the publisher at: http://dx.doi.org/10.1155/2013/670878 Open Access This paper presents an unknown input Proportional Multiple-Integral Observer (PIO) for synchronization of chaotic systems based on Takagi-Sugeno (TS) fuzzy chaotic models subject to unmeasurable decision variables and unknown input. In a secure communication configuration, this unknown input is regarded as a message encoded in the chaotic system and recovered by the proposed PIO. Both states and outputs of the fuzzy chaotic models are subject to polynomial unknown input with kth derivative zero. Using Lyapunov stability theory…

Lyapunov stabilityPolynomialObserver (quantum physics)Article Subjectbusiness.industryApplied MathematicsMultiple integrallcsh:MathematicsChaoticlcsh:QA1-939Fuzzy logicVDP::Mathematics and natural science: 400::Mathematics: 410::Analysis: 411Nonlinear Sciences::Chaotic DynamicsSecure communicationControl theorySynchronization (computer science)businessAnalysisMathematicsAbstract and Applied Analysis
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Impulsive control on the synchronization for a class of chaotic Systems

2014

In this paper, the impulsive control problem on the synchronization for a class of chaotic systems is discussed. Based on Lyapunov stability theory, the new impulsive synchronization strategy is presented to realize the chaos synchronization and possesses the wider scope of application. Finally the numerical simulation examples are given to demonstrate the effectiveness of our theoretical results.

Lyapunov stabilitychaos systemClass (set theory)Computer simulationSynchronization of chaoschaos system; impulsive switching; Lyapunov stability; synchronization; Electrical and Electronic Engineering; Control and Systems EngineeringLyapunov exponentimpulsive switchingSynchronizationNonlinear Sciences::Chaotic DynamicsCHAOS (operating system)symbols.namesakeControl and Systems EngineeringControl theoryLyapunov stabilitysymbolsElectrical and Electronic EngineeringLyapunov redesignsynchronizationMathematics2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE)
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H<inf>∞</inf> controller design for the synchronization of a hyper-chaotic system

2013

In this paper, the robust control on the synchronization of a hyper-chaotic system is investigated. Based on Lyapunov stability theory and linear matrix inequality techniques, the multi-dimensional and the single-dimensional robust H∞ synchronization controllers are constructed for the possible application in practical engineering. Some numerical simulations are provided to demonstrate the effectiveness of the presented controllers.

Lyapunov stabilitysymbols.namesakeControl theoryChaoticsymbolsLinear matrix inequalityControl engineeringLyapunov equationLyapunov exponentRobust controlLyapunov redesignSynchronizationMathematics2013 9th Asian Control Conference (ASCC)
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HOW DO FISCAL CONSOLIDATION AND FISCAL STIMULI IMPACT ON THE SYNCHRONIZATION OF BUSINESS CYCLES?

2016

Using quarterly data for a panel of advanced economies, we show that synchronized fiscal consolidation (stimulus) programmes in different countries make their business cycles more closely linked. We also find: (i) some evidence of decoupling when an inflation targeting regime is unilaterally adopted; (ii) an increase in business cycle synchronization when countries fix their exchange rates and become members of a monetary union; (iii) a positive effect of bilateral trade on the synchronization of business cycles. Global factors, such as a rise in global risk aversion and uncertainty and a reversal of nonstandard expansionary monetary policy, can also reduce the degree of co-movement of busi…

MacroeconomicsEconomics and Econometrics050208 financeInflation targeting05 social sciencesMonetary policyBusiness cycle synchronizationFiscal policyBilateral tradeConsolidation (business)0502 economics and businessEconomicsBusiness cycle050207 economicsGlobal riskBulletin of Economic Research
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MACROECONOMIC SYNCHRONIZATION BETWEEN G3 COUNTRIES

2002

This paper studies the existence of a world business cycle by examining quarterly and annual comovements in production, prices, and interest rates in the three main world economies: Germany, Japan and the U.S. In accordance with earlier studies, contemporaneous relationships clearly dominate short-term dynamics. The evidence indicates that, in the last four decades, these comovements are clearly significant in all the variables, with the possible exception of short-term interest rates, and they are stronger for long-term interest rates; nevertheless, they are rather unstable over time. Este artículo estudia la existencia de un ciclo económico mundial mediante elexamen de movimientos comunes…

MacroeconomicsEconomics and Econometricsciclo económico mundial movimiento común sincronización. comovement; synchronization; world business cycle.media_common.quotation_subjectSynchronization (computer science)Business cycleEconomicsProduction (economics)jel:E32jel:F41Interest ratemedia_common
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The importance of being “responder” in cardiac resynchronization therapy

2016

MaleCardiac resynchronization therapy (CRT)medicine.medical_specialtyPrognosimedicine.medical_treatmentCardiac resynchronization therapyLong Term Adverse EffectsLong Term Adverse Effect030204 cardiovascular system & hematologySeverity of Illness IndexVentricular Function LeftCardiac Resynchronization Therapy03 medical and health sciences0302 clinical medicineRetrospective StudieInternal medicinemedicineHumans030212 general & internal medicineAgedMonitoring PhysiologicRetrospective StudiesHeart FailureVentricular Remodelingbusiness.industryResponderMiddle AgedSurvival AnalysisNon respondersHeart failure (HF)Treatment OutcomeNon-responderItalyCardiologyFemaleSurvival AnalysiCardiology and Cardiovascular MedicinebusinessHumanInternational Journal of Cardiology
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Naturalistic music and dance: Cortical phase synchrony in musicians and dancers

2018

Expertise in music has been investigated for decades and the results have been applied not only in composition, performance and music education, but also in understanding brain plasticity in a larger context. Several studies have revealed a strong connection between auditory and motor processes and listening to and performing music, and music imagination. Recently, as a logical next step in music and movement, the cognitive and affective neuro-sciences have been directed towards expertise in dance. To understand the versatile and overlapping processes during artistic stimuli, such as music and dance, it is necessary to study them with continuous naturalistic stimuli. Thus, we used long exce…

MaleCentral Nervous Systemkognitiomusic perceptionDancePhysiologytanssiEmotionsSocial Scienceslcsh:Medicinemusculoskeletal systemContemporary danceNervous Systemtuki- ja liikuntaelimetBAND0302 clinical medicinehavainnointiMedicine and Health SciencesPsychologymusic cognitionBRAINlcsh:SciencekiihtyvyysCerebral CortexClinical NeurophysiologyBrain MappingMultidisciplinaryMusic psychologyPhysics05 social sciencesClassical MechanicsSENSORIMOTOR SYNCHRONIZATIONMusic and movementFUNCTIONAL-ROLEElectrophysiologySilenceBioassays and Physiological AnalysisBrain ElectrophysiologyPhysical Sciencesta6131FemaleSensory PerceptionAnatomyPsychologyelectroencephalographyResearch ArticleCognitive psychologyAdult515 PsychologyImaging TechniqueskeskushermostomusiikkiNeurophysiologybioakustiikkaMIRROR-NEURON SYSTEMNeuroimagingContext (language use)Research and Analysis Methodsta3112050105 experimental psychologybioacousticsYoung Adult03 medical and health sciencesTHETA-SYNCHRONIZATIONtunteetOSCILLATIONSHumans0501 psychology and cognitive sciencesActive listeningDancingPERCEPTIONDESYNCHRONIZATIONElectrophysiological Techniqueslcsh:RCognitive PsychologyBiology and Life SciencesAcousticsaccelerationliikeMusic educationBrain WavesElectrophysiological PhenomenaALPHAaivokuoriAcoustic StimulationCognitive Science516 Educational scienceslcsh:QClinical MedicineMusic030217 neurology & neurosurgeryNeurosciencePLOS ONE
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Hippocampo-cerebellar theta band phase synchrony in rabbits.

2009

Hippocampal functioning, in the form of theta band oscillation, has been shown to modulate and predict cerebellar learning of which rabbit eyeblink conditioning is perhaps the most well-known example. The contribution of hippocampal neural activity to cerebellar learning is only possible if there is a functional connection between the two structures. Here, in the context of trace eyeblink conditioning, we show (1) that, in addition to the hippocampus, prominent theta oscillation also occurs in the cerebellum, and (2) that cerebellar theta oscillation is synchronized with that in the hippocampus. Further, the degree of phase synchrony (PS) increased both as a response to the conditioning sti…

MaleCerebellumPeriodicityHippocampusContext (language use)Hippocampal formationHippocampus03 medical and health sciencesRandom Allocation0302 clinical medicineNeural ensembleCerebellummedicineOscillation (cell signaling)AnimalsLearningCortical SynchronizationTheta Rhythm030304 developmental biology0303 health sciencesAnalysis of VarianceGeneral NeuroscienceConditioning EyelidElectrodes Implantedmedicine.anatomical_structurenervous systemEyeblink conditioningPractice PsychologicalRabbitsPsychologyNeuroscience030217 neurology & neurosurgeryCortical SynchronizationNeuroscience
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