Results 21 to 30 of about 7,009,663 (303)

Computation of transfer function matrices of periodic systems [PDF]

open access: yes, 2002
We present a numerical approach to evaluate the transfer function matrices of a periodic system corresponding to lifted state-space representations as constant systems.
A. Varga, Varga, Andras
core   +1 more source

Convolutions in (µ, ν)-pseudo-almost periodic and (µ, ν)-pseudo-almost automorphic function spaces and applications to solve integral equations

open access: yesCubo, 2021
In this paper we give sufficient conditions on $k\in L^1(\mathbb{R})$ and the positive measures $\mu$, $\nu$ such that the doubly-measure pseudo-almost periodic (respectively, doubly-measure pseudo-almost automorphic) function spaces are invariant by the
David Békollè   +4 more
doaj   +1 more source

Besicovitch Almost Periodic Solutions of Abstract Semi-Linear Differential Equations with Delay

open access: yesMathematics, 2022
In this paper, first, we give a definition of Besicovitch almost periodic functions by using the Bohr property and the Bochner property, respectively; study some basic properties of Besicovitch almost periodic functions, including composition theorem ...
Yongkun Li, Mei Huang, Bing Li
doaj   +1 more source

Almost periodic sequences and functions with given values [PDF]

open access: yes, 2011
summary:We present a method for constructing almost periodic sequences and functions with values in a metric space. Applying this method, we find almost periodic sequences and functions with prescribed values.
Veselý, Michal
core   +1 more source

Almost Periodic Solutions for Some Convolution Equations

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2013
We use the theory of Fourier series for almost periodic functions to looking for complex-valued functions f which are almost periodic on R and satisfy the following ...
Corduneanu Silvia-Otilia
doaj   +1 more source

ON THE ALMOST PERIODIC AT INFINITY FUNCTIONS FROM HOMOGENEOUS SPACES

open access: yesПроблемы анализа, 2018
We consider homogeneous spaces of functions defined on the real axis (or semi-axis) with values in a complex Banach space. We study the new class of almost periodic at infinity functions from homogeneous spaces.
Baskakov A. G.   +2 more
doaj   +1 more source

Optimal periodic output feedback control: a continuous-time approach [PDF]

open access: yes, 2007
: This paper addresses the problem of optimal static output feedback control of linear periodic systems. The proposed approach, which allows to deal with both stable and unstable open loop systems, relies on a continuous-time formulation of the control ...
VIGANO', LUCA   +8 more
core   +1 more source

Almost periodic solutions with a prescribed spectrum of linear and quasilinear differential equations with almost periodic coefficients and constant time lag (Neutral differential equations) [PDF]

open access: yes, 2012
summary:The paper is the extension of the author's previous papers and solves more complicated problems. Almost periodic solutions of a certain type of almost periodic linear or quasilinear systems of neutral differential equations are dealt ...
Fischer, Alexandr
core   +1 more source

On an nth-order infinitesimal generator and time-dependent operator differential equation with a strongly almost periodic solution

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
In a Banach space, if u is a Stepanov almost periodic solution of a certain nth-order infinitesimal generator and time-dependent operator differential equation with a Stepanov almost periodic forcing function, then u,u′,…,u (n−2) are all strongly almost ...
Aribindi Satyanarayan Rao
doaj   +1 more source

Subharmonic Almost Periodic Functions

open access: yes, 2007
We prove that almost periodicity in the sense of distributions coincides with almost periodicity with respect to Stepanov's metric for the class of subharmonic functions in a horizontal strip. We also prove that Fourier coefficients of these functions are continuous functions in Im z.
Rakhnin, A.V., Favorov, S.Yu.
openaire   +4 more sources

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