Browsing by Subject "MATHEMATICS"
Now showing items 120 of 21

A Data Dropout Compensation Algorithm Based on the Iterative Learning Control Methodology for DiscreteTime Systems
(Hindawi Publishing Corporation, 2015)This paper deals with the convergence of a remote iterative learning control system subject to data dropouts. The system is composed by a set of discretetime multiple inputmultiple output linear models, each one with its ... 
Adaptive stabilization of continuoustime systems through a controllable modified estimation model
(Hindawi Publishing Corporation, 2004)This paper presents an indirect adaptive control scheme of continuoustime systems. The estimated plant model is controllable and then the adaptive scheme is free from singularities. Such singularities are avoided through ... 
Cohomologically Kähler manifolds with no Kähler metrics
(Hindawi Publishing Corporation, 2003)We show some examples of compact symplectic solvmanifolds, of dimension greater than four, which are cohomologically Kähler and do not admit Kähler metric since their fundamental groups cannot be the fundamental group ... 
Community structure in realworld networks from a nonparametrical synchronizationbased dynamical approach
(Elsevier, 20120720)[EN]This work analyzes the problem of community structure in realworld networks based on the synchronization of nonidentical coupled chaotic Rössler oscillators each one characterized by a defined natural frequency, and ... 
Constant mean curvature hypersurfaces with constant δinvariant
(Hindawi Publishing Corporation, 2003)We completely classify constant mean curvature hypersurfaces (CMC) with constant δinvariant in the unit 4sphere S4 and in the Euclidean 4space E4. 
Effective and Robust Generalized Predictive Speed Control of Induction Motor
(Hindawi Publishing Corporation, 20131016)This paper presents and validates a new proposal for effective speed vector control of induction motors based on linear Generalized Predictive Control (GPC) law. The presented GPCPI cascade configuration simplifies the ... 
Framework for the Shape Optimization of Aerodynamic Profiles Using Genetic Algorithms
(Hindawi Publishing Corporation, 2013)This study developed a framework for the shape optimization of aerodynamics profiles using computational fluid dynamics (CFD) and genetic algorithms. Agenetic algorithm code and a commercial CFD code were integrated to ... 
Global Stability of Polytopic Linear TimeVarying Dynamic Systems under TimeVarying Point Delays and Impulsive Controls
(Hindawi Publishing Corporation, 2010)This paper investigates the stability properties of a class of dynamic linear systems possessing several linear timeinvariant parameterizations (or configurations) which conform a linear timevarying polytopic dynamic ... 
Linear Chromatic Adaptation Transform Based on Delaunay Triangulation
(Hindawi Publishing, 2014)Computer vision algorithms that use color information require color constant images to operate correctly. Color constancy of the images is usually achieved in two steps: first the illuminant is detected and then image is ... 
Linear Chromatic Adaptation Transform Based on Delaunay Triangulation
(Hindawi, 201401)Computer vision algorithms that use color information require color constant images to operate correctly. Color constancy of the images is usually achieved in two steps: first the illuminant is detected and then image is ... 
Low Effort Li Nuclear Fusion Plasma Control Using Model Predictive Control Laws
(Hindawi Publishing, 2015)One of the main problems of fusion energy is to achieve longer pulse duration by avoiding the premature reaction decay due to plasma instabilities. The control of the plasma inductance arises as an essential tool for the ... 
On minimal realizations and minimal partial realizations of linear timeinvariant systems subject to point incommensurate delays
(Hindawi Publishing Corporation, 2008)This paper investigates key aspects of realization and partial realization theories for linear timeinvariant systems being subject to a set of incommensurate internal and external point delays. The results are obtained ... 
On poleplacement controllers for linear timedelay systems with commensurate point delays
(Hindawi Publishing Corporation, 2005)We investigate the exact and approximate spectrum assignment properties associated with realizable outputfeedback poleplacementtype controllers for singleinput singleoutput linear timeinvariant timedelay systems ... 
On the Necessary and Sufficient Condition for a Set of Matrices to Commute and Some Further Linked Results
(Hindawi Publishing Corporation, 2009)This paper investigates the necessary and sufficient condition for a set of (real or complex) matrices to commute. It is proved that the commutator [A,B]=0 for two matrices A and B if and only if a vector v(B) defined ... 
Oscillatory behavior in linear difference equations under unmodeled dynamics and parametrical errors
(Hindawi Publishing Corporation, 2007)This paper investigates the presence of oscillating solutions in timevarying difference equations even in the case when there exist parametrical errors (i.e., errors in the sequences defining their coefficients) and/or ... 
Performance of an Ocean Energy Conversion System with DFIG Sensorless Control
(Hindawi Publishing Corporation, 201305)The 2009/28/EC Directive requires Member States of the European Union to adopt a National Action Plan for Renewable Energy. In this context, the Basque Energy Board, EVE, is committed to research activities such as the ... 
Robust Sliding Control of SEIR Epidemic Models
(Hindawi Publishing, 2014)This paper is aimed at designing a robust vaccination strategy capable of eradicating an infectious disease from a population regardless of the potential uncertainty in the parameters defining the disease. For this purpose, ... 
Robust Sliding Mode Control for Tokamaks
(Hindawi Publishing Corporation, 2012)Nuclear fusion has arisen as an alternative energy to avoid carbon dioxide emissions, being the tokamak a promising nuclear fusion reactor that uses a magnetic field to confine plasma in the shape of a torus. However, ... 
Sliding mode control law for a variable speedwind turbine
(WSEAS, 2011)Modern wind turbines are designed in order to work in variable speed operations. To perform this task, wind turbines are provided with adjustable speed generators, like the double feed induction generator. One of the main ... 
Stability Results for Switched Linear Systems with Constant Discrete Delays
(Hindawi Publishing Corporation, 2008)This paper investigates the stability properties of switched systems possessing several parameterizations (or configurations) while being subject to internal constant point delays. Some of the stability results are formulated ...