Search results for "Synchro"

showing 10 items of 886 documents

XLCS: A New Bit-Parallel Longest Common Subsequence Algorithm on Xeon Phi Clusters

2019

Finding the longest common subsequence (LCS) of two strings is a classical problem in bioinformatics. A basic approach to solve this problem is based on dynamic programming. As the biological sequence databases are growing continuously, bit-parallel sequence comparison algorithms are becoming increasingly important. In this paper, we present XLCS, a new parallel implementation to accelerate the LCS algorithm on Xeon Phi clusters by performing bit-wise operations. We have designed an asynchronous IO framework to improve the data transfer efficiency. To make full use of the computing resources of Xeon Phi clusters, we use three levels of parallelism: node-level, thread-level and vector-level.…

Longest common subsequence problemDynamic programmingSpeedupComputer scienceComputer clusterAsynchronous I/OCacheSupercomputerAlgorithmXeon Phi2019 IEEE 21st International Conference on High Performance Computing and Communications; IEEE 17th International Conference on Smart City; IEEE 5th International Conference on Data Science and Systems (HPCC/SmartCity/DSS)
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Robust H∞ synchronization of a hyper-chaotic system with disturbance input

2013

Abstract This paper concerns the robust control problems on the synchronization of a hyper-chaotic system with disturbance input. Using an appropriate Lyapunov function, we design the multi-dimensional and the single-dimensional robust H ∞ synchronization controllers in terms of linear matrix inequalities for the application in practical engineering. Corresponding theoretical derivations are given subsequently. Finally, some numerical simulations are provided to demonstrate the effectiveness of the proposed techniques.

Lyapunov functionDisturbance (geology)Computer scienceApplied MathematicsGeneral EngineeringChaoticGeneral MedicineLinear matrixSynchronizationComputational Mathematicssymbols.namesakeH-infinity methods in control theoryControl theorysymbolsRobust controlGeneral Economics Econometrics and FinanceAnalysis
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-Infinity robust controller design for the synchronization of master-slave chaotic systems with disturbance input

2012

Published version of an article from the journal: Modeling, Identification and Control. Also available from the publisher: http://dx.doi.org/10.4173/mic.2012.1.3 This paper is concerned with the robust control problems for the synchronization of master-slave chaotic systems with disturbance input. By constructing a series of Lyapunov functions, novel H1 robust syn- chronization controllers are designed, whose control regulation possess the characteristic of simpleness and explicitness. Finally, numerical simulations are provided to demonstrate the e ectiveness of the proposed techniques.

Lyapunov functionDisturbance (geology)Series (mathematics)Computer scienceVDP::Technology: 500::Mechanical engineering: 570Robust controlMaster/slavelcsh:QA75.5-76.95Computer Science Applicationssymbols.namesakeH-infinity methods in control theoryControl and Systems EngineeringControl theoryChaotic systemsModeling and SimulationSynchronization (computer science)symbolsChaoslcsh:Electronic computers. Computer scienceRobust controlSoftwareModeling, Identification and Control: A Norwegian Research Bulletin
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Input-Output Feedback Linearization Control with On-Line Inductances Estimation of Synchronous Reluctance Motors

2021

This paper proposes an adaptive input-output Feedback Linearization (FL) techniques for Synchronous Reluctance Motor (SynRM) drives, taking into consideration the iron losses. As a main original content, this work proposes a control law based on a new dynamic model of the SynRM including iron losses as well as the on-line estimation of the static inductances. The on-line estimation of the SynRM static inductances permits to inherently take into consideration the magnetic saturation phenomena occuring on both axes. The estimation law is obtained thanks to a Lyapunov-based analysis and thus the stability of the entire control system, including the estimation algorithm, is intrinsically guaran…

Lyapunov functionfeedback linearizationSynchronous reluctance motorMagnetic reluctanceComputer scienceStability (learning theory)Nonlinear systemsymbols.namesakeinductances estimationSettore ING-INF/04 - AutomaticaControl theoryControl systemLine (geometry)symbolsA priori and a posterioriFeedback linearizationAdaptive system
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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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