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نتیجه جستجو - Electromagnetic induction

تعداد مقالات یافته شده: 4
ردیف عنوان نوع
1 Effects of electromagnetic induction on vibrational resonance in single neurons and neuronal networks
اثرات القایی الکترومغناطیسی بر تشدید ارتعاش در سلولهای عصبی تنها و شبکه های عصبی-2020
In this paper, Vibrational Resonance (VR), in which the response of some dynamical systems to a weak, low frequency signal can be enhanced by the optimal amplitude of high frequency signal, is investigated under the effects of electromagnetic induction in both single neurons and small-world networks. We find that the occurrence of VR in single neurons requires less energy in the presence of electromagnetic induction, although the resonant peak of the response reduces. Besides, VR can be obtained in small-world networks both with and without electromagnetic induction. In small-world neuronal networks, the highest resonance peak of VR enhances with an increase in the probability of adding link in case of without electromagnetic induction. On the other hand, with the increasing of the probability of adding link, VR disappears in the presence of relatively strong electromagnetic induction, while it enhances in the presence of relatively weak electromagnetic induction
Keywords: Electromagnetic induction | Vibrational resonance | Hodgkin–Huxley neuron
مقاله انگلیسی
2 Vibrational mono-/bi-resonance and wave propagation in FitzHugh–Nagumo neural systems under electromagnetic induction
تک لرزش و تکثیر ارتعاش و انتشار موج در سیستم های عصبی FitzHugh–Nagumo تحت القای الکترومغناطیسی-2020
In this paper, an modified FitzHugh–Nagumo (FHN) neural model was employed to investigate the vibra- tional resonance (VR) phenomenon, the collective behaviors, and the transmission of weak low-frequency (LF) signal driven by high-frequency (HF) stimulus under the action of different electromagnetic induction in single FHN neuron and feed-forward feedback network (FFN) system, respectively. For the single FHN system, by increasing the amplitude of HF stimulus, the phenomena of vibrational mono-/bi-resonance are observed, and the input weak signal and output of system are synchronized, and the information of the weak LF signal is amplified. For the FFN system, the phenomena of vibrational mono-/bi-resonances are also occurred, both frequency and amplitude of the HF stimulus play an important role in the vibra- tional bi-resonances and transmission of weak LF signal in the FHN neural FFN.
Keywords: Vibrational resonance | FitzHugh–Nagumo model | Feed-forward feedback | neural network Electromagnetic induction | Chaos and bifurcation analysis
مقاله انگلیسی
3 Time delayed chemical synapses and synchronization in multilayer neuronal networks with ephaptic inter-layer coupling
تأخیر زمان در سیناپسهای شیمیایی و هماهنگ سازی در شبکه های عصبی چند لایه با اتصال بین لایه ای ephaptic -2020
In this paper, a three-layer neuronal network is studied to consider different com plex con- nections between the neurons. In the nervous system, the communication between the neurons is mostly based on the electrical and chemical synapses. However, extracellular electric fields can induce a magnetic flux which can lead to indirect neural communica- tions, by means of electromagnetic induction. This mode of coupling is called ephaptic coupling, which here is used between the layer. To describe the coupling within the lay- ers, the electrical and chemical synapses are defined. We also take into account the par- tial time delays, to reflect the required time for information transmission through chem- ical synapses. Particularly, we consider partial and full time delays, as well as strong and weak coupling strengths. It is shown that three layers typically have opposite synchroniza- tion properties in the strong and weak coupling regimes. Specifically, when the coupling is strong, the top and bottom layers are synchronous, while the middle layer is desyn- chronous. But when the coupling is weak, the middle layer is synchronous, while the top and bottom layers are desynchronous. In overall, the most synchrony is obtained when the weak coupling is accompanied with partial time delays in chemical communications. Our research sheds new light on the complex interplay between the time delay, the ephaptic coupling, and the synchronization in neuronal networks.
Keywords: Multilayer network | Ephaptic coupling | Time delay | Synchronization
مقاله انگلیسی
4 Long-range memory effects in a magnetized Hindmarsh-Rose neural network
اثرات حافظه با برد طولانی در یک شبکه عصبی مغناطیسی Hindmarsh-Rose-2020
We consider a model network of diffusively coupled Hindmarsh-Rose neurons to study both analytically and numerically, long-range memory effects on the modulational instabil- ity phenomenon, chaotic, synchronous and chimera states within the network. The multi- ple scale method is used to reduce the generic model into a discrete nonlinear Schrödinger equation. The latter is explored in the linear stability analysis and the instability criterion along with the critical amplitude are derived. The analytical results predict that strong lo- cal coupling, high electromagnetic induction and strong long-range interactions may sup- port the formation of highly localized excitations in neural networks. Through numeri- cal simulations, the largest Lyapunov exponents are computed for studying chaos, the synchronization factor and the strong of incoherence are recorded for studying, respec- tively synchronous and chimera states in the network. We find the appropriate domains of space parameters where these rich activities could be observed. As a result, quasi-periodic synchronous patterns, chaotic chimera and synchronous states, strange chaotic and non- chaotic attractors are found to be the main features of membrane potential coupled with memristive current during long-range memory activities of neural networks. Our results suggest that a combination of long-range activity and memory effects in neural networks may produces a rich variety of membrane potential patterns which are involved in infor- mation processing, odors recognition and discrimination and various diseases in the brain.
Keywords: Modulational instability | Chaos | Synchronization | Chimera states
مقاله انگلیسی
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بازدید امروز: 3808 :::::::: بازدید دیروز: 3097 :::::::: بازدید کل: 38075 :::::::: افراد آنلاین: 50