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


Frequency entrainment and anti-entrainment of coupled active rotators synchronized by common noise

Topic and Aim. We study the effect of common noise on the ensemble of coupled active rotators. Such a noise always has a synchronizing effect on the system, whereas the coupling may be attracting (synchronizing) or repulsing

Пороговая устойчивость энергосети с топологией хаб-кластера

Цели. Основной целью данной работы является исследование динамики модели энергосети с топологией хаб-кластера на основе уравнений Курамото с учетом инерции. Особая роль отводится изучению
устойчивости синхронного режима работы сети, а также поиску условий его глобальной устойчивости. Рассматривается вопрос об условиях реализации синхронного режима в случае сосуществования нескольких режимов работы сети.
Методы. В работе проводится численное моделирование различных режимов работы энергосети.


На примере двух компланарных металлических маятников, точки подвеса которых находятся на одном горизонтальном уровне при фиксированном расстоянии b друг от друга, показана принципиальная возможность их синхронизации благодаря учету двух факторов: 1. Эффекту электромагнитного взаимодействия между ними и 2. Учету ЭМ излучения, приводящего к нелинейному затуханию. Получена система нелинейных динамических уравнений движения, и дана численная оценка времени синхронизации.

Frequency repulsion in ensembles of general limit-cycle oscillators synchronized by common noise in the presence of global desynchronizing coupling

Topic. We study the interaction of two fundamentally different synchronization mechanisms: by means of coupling and by means of the driving by a random signal, which is identical for all oscillators – common noise. Special attention is focused on the effect of frequency divergence arising from the competition between these mechanisms. Aim. The aim of the paper is to construct a universal theory describing such an interaction for a general class of smooth limit-cycle oscillators with a global coupling.

Synchronization of reactively coupled phase oscillators driven by external force

Synchronization of two reactively coupled van der Pol oscillators with external force is investigated in this paper. We consider and compare quasi-periodic motion of oscillators with frequency-locked mode. The paper includes maps of Lyapunov’s exponents, two-parametric bifurcation diagrams and phase portraits. Possible types of motion in driven system are discussed.

Spectral components’ behavior in coupled pierce diodes near the phase synchronization boundary

In this article we study the dynamics of two unidirectionally coupled Pierce diodes near the phase synchronization boundary in terms of synchronization of spectral components. We show that systems under consideration demonstrate self-similar behavior with any value of coupling strength within the region of our study. The results correlate with the data of the similar research for R ?ossler systems and circle map.

Coherent resonance in klystron oscillators on self-excitation threshold

This work presents experimental results of synchronization of coherent resonance phenomena in cascade klystron oscillator with delayed feedback on self-excitation threshold. Degree of coherence, signal-to-noise ratio and synchronization wideband for single and cascade klystron oscillators were compared.

Calcium oscillations in astrocytes part 1 astrocyte as generator of calcium oscillations

Bifurcation mechanisms of oscillatory dynamics in a biophysical model of chemically excitable brain cells (astrocytes) were analyzed. In contrast to neuronal oscillators widely studied in nonlinear dynamics the astrocytes do not possess electrical excitability but capable to generate chemical oscillations which modulate neuronal signaling. Astrocyte dynamics is described by third-order system of ordinary di?erential equations derived from biophysical kinetics.

Calcium oscillations in astrocytes part 2 dynamics of interacting calcium oscillators

We investigated bifurcation mechanisms of oscillatory dynamics of interacting chemically excitable cells (astrocytes). In model of three interacting astrocytes we studied bifurcation transitions leading to generation of calcium oscillations induced by the intercellular di?usion. We analyzed basic mechanisms of limit cycle instabilities and destructions, typical transitions to chaotic oscillations and basic properties of intercellular synchronization.

Destruction of the coherent mode in system of two oscillators at the strong resonant mutual couplings

The hypothesis about destruction of a coherent mode in system of two mutual couplings microwave oscillators is examine, each of which in a stand­alone mode generates stable unifrequent oscillations. It is experimentally shown, that at strong resonant couplings synchronous oscillations are unstable, therefore the system go over in in a mode of dynamic chaos.