Results 11 to 20 of about 359 (49)

Periodic behaviors [PDF]

open access: yes, 2010
This paper studies behaviors that are defined on a torus, or equivalently, behaviors defined in spaces of periodic functions, and establishes their basic properties analogous to classical results of Malgrange, Palamodov, Oberst et al.
Napp, Diego   +2 more
core   +14 more sources

Rank deficiency of Kalman error covariance matrices in linear time-varying system with deterministic evolution [PDF]

open access: yes, 2016
We prove that for-linear, discrete, time-varying, deterministic system (perfect-model) with noisy outputs, the Riccati transformation in the Kalman filter asymptotically bounds the rank of the forecast and the analysis error covariance matrices to be ...
Alberto Carrassi   +11 more
core   +2 more sources

Mathematical Identification of a Neuronal Network Consisting of GABA and DA in Striatal Slices of the Rat Brain

open access: yesComputational and Mathematical Methods in Medicine, Volume 10, Issue 4, Page 273-285, 2009., 2009
High frequency stimulation (HFS) has been used to treat various neurological and psychiatric diseases. Although further disorders are under investigation to extend the clinical application of HFS, the complex effect of HFS within a neuronal network is still unknown.
L. Ramrath   +5 more
wiley   +1 more source

On the uniform exponential stability of linear time‐delay systems

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2004, Issue 64, Page 3445-3467, 2004., 2004
This paper deals with the global uniform exponential stability independent of delay of time‐delay linear and time‐invariant systems subject to point and distributed delays for the initial conditions being continuous real functions except possibly on a set of zero measure of bounded discontinuities. It is assumed that the delay‐free system as well as an
M. de la Sen, Ningsu Luo
wiley   +1 more source

Stability analysis of periodically switched linear systems using Floquet theory

open access: yesMathematical Problems in Engineering, Volume 2004, Issue 1, Page 1-10, 2004., 2004
Stability of a switched system that consists of a set of linear time invariant subsystems and a periodic switching rule is investigated. Based on the Floquet theory, necessary and sufficient conditions are given for exponential stability. It is shown that there exists a slow switching rule that achieves exponential stability if at least one of these ...
Cevat Gökçek
wiley   +1 more source

Structured backward errors for eigenvalues of linear port-Hamiltonian descriptor systems

open access: yes, 2020
When computing the eigenstructure of matrix pencils associated with the passivity analysis of perturbed port-Hamiltonian descriptor system using a structured generalized eigenvalue method, one should make sure that the computed spectrum satisfies the ...
Mehrmann, Volker, Van Dooren, Paul
core   +1 more source

Robust control of discrete‐time hybrid systems with uncertain modal dynamics

open access: yesMathematical Problems in Engineering, Volume 2004, Issue 3, Page 197-208, 2004., 2004
We study systems that are subject to sudden structural changes due to either changes in the operational mode of the system or failure. We consider linear dynamicalsystems that depend on a modal variable which is either modeled as a finite‐state Markov chain or generated by an automaton that is subject to an external disturbance.
Thordur Runolfsson
wiley   +1 more source

Conditions for convergence of the fundamental matrix of linear time‐invariant time‐delayed singular systems

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 31, Issue 8, Page 463-475, 2002., 2002
In the introductory part of this paper the so‐called general Bromwich-Wagner′s theorem has been generalized. Throughout the main part of the paper, an attempt has been made to derive conditions for convergence of the fundamental matrix of linear time‐invariant time‐delayed singular systems.
Branko Saric
wiley   +1 more source

On the finite Fourier transforms of functions with infinite discontinuities

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 30, Issue 5, Page 301-317, 2002., 2002
The introductory part of the paper is provided to give a brief review of the stability theory of a matrix pencil for discrete linear time‐invariant singular control systems, based on the causal relationship between Jordan′s theorem from the theory of Fourier series and Laurent′s theorem from the calculus of residues. The main part is concerned with the
Branko Saric
wiley   +1 more source

A semigroup characterization of well-posed linear control systems [PDF]

open access: yes, 2013
We study the well-posedness of a linear control system $\Sigma(A,B,C,D)$ with unbounded control and observation operators. To this end we associate to our system an operator matrix $\mathcal{A}$ on a product space $\mathcal{X}^p$ and call it $p$-well ...
Bombieri, Miriam, Engel, Klaus-Jochen
core   +1 more source

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