ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)


Прикладные задачи нелинейной теории колебаний и волн

Asymptotic research of local dynamics of the Cahn–Hilliard family equations

Topic. Dynamics of well-known Cahn–Hilliard nonlinear equation is researched. In a state of balance stability task, critical cases were highlighted and bifurcation phenomena were researched. Aim. To formulate finite-dimensional and special infinite-dimensional equations, which can be represented as normal forms. Method. You can use as standard local dynamics research methods, based on constructing of normal forms on central manifolds, and special infinite-dimensional normalization ones.

SIRS модель распространения инфекций с динамическим регулированием численности популяции: исследование методом вероятностных клеточных автоматов

Построена модифицированная SIRS модель распространения эпидемий в ви-
де решетки стохастических клеточных автоматов. В модели используется динамическое регулирование численности населения с ограничением максимального числа особей популяции и влиянием заболевания на процессы воспроизводства. Обнаружено, что

Multistability of periodic orbits in ensembles of maps with long-range couplings

 Aim. The aim of the investigation is to study the regularities of phase multistability in an ensemble of oscillatory systems with non-local couplings in dependance of strength and radius of the couplings, as well as to describe them from the point of view of the spatial spectrum.

MULTISTABILITY OF TRAVELING WAVES IN AN ENSEMBLE OF HARMONIC OSCILLATORS WITH LONG-RANGE COUPLINGS

The work is devoted to study of multistability of traveling waves in a ring of harmonic oscillators with a linear non-local couplings. It analyses the influence of the strength and radius of the couplings on stability of spatially periodic regimes with different values of their wavelengths. The system under study is an array of identical van der Pol generators in the approximation of quasi-harmonic oscillations.

COMPLEX DYNAMICS AND CHAOS IN ELECTRONIC SELF-OSCILLATOR WITH SATURATION MECHANISM PROVIDED BY PARAMETRIC DECAY

We consider an electronic oscillator based on two LC-circuits, one of which includes negative conductivity (the active LC-circuit), where complex dynamics and chaos occur corresponding to the model of wave turbulence of Vyshkind–Rabinovich. The saturation effect for the self-oscillations and their chaotisation take place due to parametric mechanisms due to the presence of a quadratic nonlinear reactive element based on an operational amplifier and an analog multiplier.

INFLUENCE OF INERTIAL PROPERTIES AND DELAY OF THE MEAN FIELD ON THE COLLECTIVE DYNAMICS OF GLOBALLY COUPLED BISTABLE DELAYED-FEEDBACK OSCILLATORS

The features of collective dynamics of oscillators are studied in an ensemble of identical bistable time-delay systems globally coupled via the mean field. The influence of inertial properties and delay of the mean field on the collective dynamics of oscillators is considered. It is shown that a variety of oscillation regimes in the ensemble is caused by the presence of bistable states with considerably different basic frequencies in coupled oscillators.

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