Results 21 to 30 of about 185,882 (261)
Gap solitons in almost periodic one-dimensional structures [PDF]
, 2015 We consider almost periodic stationary nonlinear Schr\"odinger equations in dimension $1$. Under certain assumptions we prove the existence of nontrivial finite energy solutions in the strongly indefinite case.
Pankov, Alexander
core +1 more source
Electronic 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
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Doppler Spectrum Estimation by Ramanujan Fourier Transforms [PDF]
, 2009 The Doppler spectrum estimation of a weather radar signal in a classic way can be made by two methods, temporal one based in the autocorrelation of the successful signals, whereas the other one uses the estimation of the power spectral density PSD by ...
Bensebti, Messaoud, Lagha, Mohand
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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 +2 more
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IEEE 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
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Journal of Harbin University of Science and Technology, 2019 Almost periodic solutions of differential equations are more general than periodic solutions, so almost periodic solutions will be studied on a class secondorder differential equations with piecewise constant argument.
YAO Hui-li +2 more
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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 +3 more
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Forbidden Substrings, Kolmogorov Complexity and Almost Periodic Sequences [PDF]
, 2006 Assume that for some $ <1$ and for all nutural $n$ a set $F_n$ of at most $2^{ n}$ "forbidden" binary strings of length $n$ is fixed. Then there exists an infinite binary sequence $ $ that does not have (long) forbidden substrings. We prove this combinatorial statement by translating it into a statement about Kolmogorov complexity and compare ...
Rumyantsev, Andrey, Ushakov, Maxim
openaire +2 more sources
Exploring the Individual Pulse Behavior of Pulsar J1701−3726 with Parkes
The Astrophysical Journal, 2023 We have carried out a detailed study of polarimetric individual pulse emission from the pulsar J1701−3726 (B1658−37), observed at 1369 MHz using the Parkes 64 m radio telescope.
H. Wang +17 more
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Almost Periodic Solutions of Abstract Impulsive Volterra Integro-Differential Inclusions
Fractal and Fractional, 2023 In this paper, we introduce and systematically analyze the classes of (pre-)(B,ρ,(tk))-piecewise continuous almost periodic functions and (pre-)(B,ρ,(tk))-piecewise continuous uniformly recurrent functions with values in complex Banach spaces.
Wei-Shih Du +2 more
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