Results 11 to 20 of about 28,500 (245)

STABILITY ANALYSIS OF PERIODIC AND ALMOST-PERIODIC DISCRETE SWITCHED LINEAR SYSTEM [PDF]

open access: yesMatrix Science Mathematic, 2018
This article shows a connection between the boundedness and uniform exponential stability of linear discrete switched system in the space of periodic and almost-periodic sequences.
Akbar Zada, Sartaj Ali
doaj   +1 more source

Regenerative Shaper of Ultrashort Light Pulses

open access: yesPhotonics, 2023
In this article, we propose and demonstrate an ultrashort light pulse regenerative shaper based on a closed-loop double-stage Mamyshev regenerator with an electrically controllable acousto-optic switch.
Kęstutis Regelskis   +2 more
doaj   +1 more source

Fields of almost periodic sequences

open access: yesJournal of Combinatorial Theory, Series A, 1977
AbstractLet F((x)) be the field of formal power series over the field with two elements F. We classify all quadratic elements in F((x)) which are almost periodic, the Morse-Hedlund sequence being a special case. We also give some results for higher-degree almost periodic elements.
Leonard E. Baum   +3 more
openaire   +1 more source

Limit periodic linear difference systems with coefficient matrices from commutative groups

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2014
In this paper, limit periodic and almost periodic homogeneous linear difference systems are studied. The coefficient matrices of the considered systems belong to a given commutative group.
Petr Hasil, Michal Veselý
doaj   +1 more source

EEG microstate periodicity explained by rotating phase patterns of resting-state alpha oscillations

open access: yesNeuroImage, 2021
Spatio-temporal patterns in electroencephalography (EEG) can be described by microstate analysis, a discrete approximation of the continuous electric field patterns produced by the cerebral cortex.
F. von Wegner   +4 more
doaj   +1 more source

Almost periodic solutions of $N$-th order neutral differential difference equations with piecewise constant arguments

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2013
In this paper, we study the existence of almost periodic solutions of neutral differential difference equations with piecewise constant arguments via difference equation methods.
Rong-Kun Zhuang
doaj   +1 more source

Some Remarks on Almost Periodic Sequences and Languages

open access: yesCoRR, 2022
Reconstructed source file of a paper originally published in 1995 in a volume currently without an online version (and with limited availability). Uploaded in order to ensure the online availability (and preservation) of the paper. This version faithfully reproduces the original, except for the addition of a note about the solution of Open Problem 3 ...
openaire   +2 more sources

Forbidden Substrings, Kolmogorov Complexity and Almost Periodic Sequences [PDF]

open access: yes, 2006
Assume that for some $α<1$ and for all nutural $n$ a set $F_n$ of at most $2^{αn}$ "forbidden" binary strings of length $n$ is fixed. Then there exists an infinite binary sequence $ω$ that does not have (long) forbidden substrings. We prove this combinatorial statement by translating it into a statement about Kolmogorov complexity and compare this ...
Andrey Yu. Rumyantsev, M. A. Ushakov
openaire   +2 more sources

A Stochastic Model of Noises for Periodic Symbol Sequences

open access: yesСовременные информационные технологии и IT-образование, 2019
The construction of almost periodic sequences is needed for the analysis of the cycles’ detection methods, identification of symbolic sequences’ features and sensitivity analysis.
Galina N. Zhukova   +2 more
doaj   +1 more source

Feature-Extraction-Based Iterated Algorithms to Solve the Unrelated Parallel Machine Problem With Periodic Maintenance Activities

open access: yesIEEE Access, 2021
This paper considers an unrelated parallel machine problem with job release times and maintenance activities, in which machines have to periodically undergo maintenance since the status of the machines will be deteriorated by job-induced dirt.
Jihong Pang, Ya-Chih Tsai, Fuh-Der Chou
doaj   +1 more source

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