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5 results on '"Mircea Ivan"'

2. Asymptotic Behaviour of the Iterates of Positive Linear Operators

Author

Ioan Gavrea and Mircea Ivan

Subjects
Mathematics, QA1-939
Abstract

We present a general result concerning the limit of the iterates of positive linear operators acting on continuous functions defined on a compact set. As applications, we deduce the asymptotic behaviour of the iterates of almost all classic and new positive linear operators.

Published
2011
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3. Asymptotic Behaviour of the Iterates of Positive Linear Operators

Author

Mircea Ivan and Ioan Gavrea

Subjects
Discrete mathematics, Pure mathematics, Compact space, Article Subject, Iterated function, lcsh:Mathematics, Applied Mathematics, Linear operators, Limit (mathematics), Operator theory, lcsh:QA1-939, Analysis, Mathematics
Abstract

We present a general result concerning the limit of the iterates of positive linear operators acting on continuous functions defined on a compact set. As applications, we deduce the asymptotic behaviour of the iterates of almost all classic and new positive linear operators.

Published
2011
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4. Iterative Methods for Obtaining Energy-Minimizing Parametric Snakes with Applications to Medical Imaging

Author

Radu Badea, Delia Mitrea, Dumitru Mircea Ivan, Alexandru I. Mitrea, Paulina Mitrea, Sergiu Nedevschi, and Octavian Mircia Gurzau

Subjects
Diagnostic Imaging, Mathematical optimization, Article Subject, Computer science, Iterative method, Finite Element Analysis, lcsh:Computer applications to medicine. Medical informatics, General Biochemistry, Genetics and Molecular Biology, Software, Approximation error, Medical imaging, Parametric statistics, General Immunology and Microbiology, business.industry, Applied Mathematics, Numerical analysis, Finite difference, General Medicine, Prostheses and Implants, Models, Theoretical, Finite element method, Modeling and Simulation, lcsh:R858-859.7, business, Research Article
Abstract

After a brief survey on the parametric deformable models, we develop an iterative method based on the finite difference schemes in order to obtain energy-minimizing snakes. We estimate the approximation error, the residue, and the truncature error related to the corresponding algorithm, then we discuss its convergence, consistency, and stability. Some aspects regarding the prosthetic sugical methods that implement the above numerical methods are also pointed out.

Published
2012

5. Hierarchical Sliding Mode Algorithm for Athlete Robot Walking

Author

Van Dong Hai Nguyen, Xuan-Dung Huynh, Minh-Tam Nguyen, Ionel Cristian Vladu, and Mircea Ivanescu

Subjects
Mechanical engineering and machinery, TJ1-1570
Abstract

Dynamic equations and the control law for a class of robots with elastic underactuated MIMO system of legs, athlete Robot, are discussed in this paper. The dynamic equations are determined by Euler-Lagrange method. A new method based on hierarchical sliding mode for controlling postures is also introduced. Genetic algorithm is applied to design the oscillator for robot motion. Then, a hierarchical sliding mode controller is implemented to control basic posture of athlete robot stepping. Successful simulation results show the motion of athlete robot.

Published
2017
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