Results 11 to 20 of about 498,134 (298)

Almost periodic sequences

Theoretical Computer Science, 2003
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Muchnik, An., Semenov, A., Ushakov, M.
openaire   +4 more sources

On the existence and stability of a unique almost periodic sequence solution in discrete predator–prey models with time delays

Applied Mathematical Modelling, 2011
Yongkun Li, Tianwei Zhang, Y. Ye
semanticscholar   +3 more sources

Mean boundedness, global attractivity and almost periodic sequence of stochastic neural networks with discrete-time analogue

Filomat, 2021
A class of stochastic neural networks with discrete-time analogue is investigated in this paper. By employing contraction mapping principle and some stochastic analysis techniques, we establish some sufficient conditions for mean boundedness, global ...
Shumin Sun, Yanhong Li
semanticscholar   +1 more source

AN ANTENNA BASED ON A HYBRID METAL–DIELECTRIC STRUCTURE [PDF]

Radio Physics and Radio Astronomy, 2021
Purpose: Nowadays, in the millimeter frequency range, the dielectric waveguides of various modifications have certain advantages over the standard metal waveguides, primarily due to the possibility of creating functional units based on them.
D. V. Mayboroda, S. O. Pogarsky
doaj   +1 more source

The Method of Estimating the Period of a Symbolic Periodic Sequence with Noise, Based on the Sub-Words Positions in the Sequence

Современные информационные технологии и IT-образование, 2020
The method of estimating the period of an almost periodic sequence is proposed. The period of an almost periodic sequence is the length of the smallest periodic pattern that composes the corresponding completely periodic sequence by repetition.
Galina Zhukova, Alexey Zhukov, Yuri Smetanin, Mikhail Ulyanov   +3 more
doaj   +1 more source

On the Relation Between Fourier Frequency and Period for Discrete Signals, and Series of Discrete Periodic Complex Exponentials

IEEE Open Journal of Signal Processing, 2021
Discrete complex exponentials are almost periodic signals, not always periodic; when periodic, the frequency determines the period, but not viceversa, the period being a chaotic function of the frequency, expressible in terms of Thomae's function.
Alfredo Restrepo, Julian Quiroga, Jairo Hurtado   +2 more
doaj   +1 more source

Periodic stellar variability from almost a million NGTS light curves [PDF]

Monthly notices of the Royal Astronomical Society, 2022
We analyse 829,481 stars from the Next Generation Transit Survey (NGTS) to extract variability periods. We utilize a generalisation of the autocorrelation function (the G-ACF), which applies to irregularly sampled time series data.
J. Briegal, E. Gillen, D. Queloz, S. Hodgkin, J. Acton, D. Anderson, David J Armstrong, M. Battley, D. Bayliss, M. Burleigh, E. Bryant, S. Casewell, J. Costes, P. Eigmuller, S. Gill, M. Goad, M. Gunther, B. Henderson, J. Jackman, J. Jenkins, Lars T. Kreutzer, M. Moyano, M. Lendl, Gareth D. Smith, R. Tilbrook, C. Watson, Robert West, P. Wheatley   +27 more
semanticscholar   +1 more source

Rotation sets and almost periodic sequences [PDF]

Mathematische Zeitschrift, 2016
We study the rotational behaviour on minimal sets of torus homeomorphisms and show that the associated rotation sets can be any type of line segments as well as non-convex and even plane-separating continua. This shows that restrictions holding for rotation sets on the whole torus are not valid on minimal sets.
Jäger, T., Passeggi, A., Štimac, Sonja
openaire   +6 more sources

Topological chaos, braiding and bifurcation of almost-cyclic sets [PDF]

, 2012
In certain two-dimensional time-dependent flows, the braiding of periodic orbits provides a way to analyze chaos in the system through application of the Thurston-Nielsen classification theorem (TNCT).
Grover, Piyush, Kumar, Pankaj, Ross, Shane D., Stremler, Mark A.   +3 more
core   +1 more source

A Stochastic Model of Noises for Periodic Symbol Sequences

Современные 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, Yuri G. Smetanin, Mikhail V. Ulyanov   +2 more
doaj   +1 more source