Results 31 to 40 of about 63,993 (274)

Understanding Epileptiform After-Discharges as Rhythmic Oscillatory Transients [PDF]

open access: yes, 2017
Electro-cortical activity in patients with epilepsy may show abnormal rhythmic transients in response to stimulation. Even when using the same stimulation parameters in the same patient, wide variability in the duration of transient response has been ...
Baier, Gerold   +2 more
core   +2 more sources

Analysis of Sub-Synchronous Band Oscillation in a DFIG System With Non-Smooth Bifurcation

open access: yesIEEE Access, 2019
With the interconnection of large-scale wind power, the sub-synchronous oscillation (SSO) which is mainly analyzed by the local small-signal method occurs in many power grids.
Ancheng Xue   +3 more
doaj   +1 more source

Stability analysis of a noise-induced Hopf bifurcation [PDF]

open access: yes, 2003
We study analytically and numerically the noise-induced transition between an absorbing and an oscillatory state in a Duffing oscillator subject to multiplicative, Gaussian white noise.
Mallick, Kirone, Marcq, Philippe
core   +4 more sources

Bifurcations in Boolean Networks [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2011
This paper characterizes the attractor structure of synchronous and asynchronous Boolean networks induced by bi-threshold functions. Bi-threshold functions are generalizations of standard threshold functions and have separate threshold values for the ...
Chris Kuhlman   +3 more
doaj   +1 more source

Global modes and nonlinear analysis of inverted-flag flapping [PDF]

open access: yes, 2017
An inverted flag has its trailing edge clamped and exhibits dynamics distinct from that of a conventional flag, whose leading edge is restrained. We perform nonlinear simulations and a global stability analysis of the inverted-flag system for a range of ...
Colonius, Tim   +2 more
core   +2 more sources

Nonlinear Torsional Vibration Analysis and Nonlinear Feedback Control of Complex Permanent Magnet Semidirect Drive Cutting System in Coal Cutters

open access: yesComplexity, 2019
The semidirect drive cutting transmission system of coal cutters is prone to unstable torsional vibration when the resistance values of its driving permanent magnet synchronous motor (PMSM) are affected by changes in temperatures and tough conditions ...
Lianchao Sheng   +5 more
doaj   +1 more source

Control of coherence resonance in semiconductor superlattices

open access: yes, 2008
We study the effect of time-delayed feedback control and Gaussian white noise on the spatio-temporal charge dynamics in a semiconductor superlattice. The system is prepared in a regime where the deterministic dynamics is close to a global bifurcation ...
E. Schöll   +6 more
core   +1 more source

Hopf Bifurcation Analysis of a New SEIRS Epidemic Model with Nonlinear Incidence Rate and Nonpermanent Immunity

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2018
A new SEIRS epidemic model with nonlinear incidence rate and nonpermanent immunity is presented in the present paper. The fact that the incidence rate per infective individual is given by a nonlinear function and product of rational powers of two state ...
M. P. Markakis, P. S. Douris
doaj   +1 more source

Multiple Dynamical Mechanisms of Phase-2 Early Afterdepolarizations in a Human Ventricular Myocyte Model: Involvement of Spontaneous SR Ca2+Release

open access: yesFrontiers in Physiology, 2020
Early afterdepolarization (EAD) is known to cause lethal ventricular arrhythmias in long QT syndrome (LQTS). In this study, dynamical mechanisms of EAD formation in human ventricular myocytes (HVMs) were investigated using the mathematical model ...
Yasutaka Kurata   +5 more
doaj   +1 more source

In vitro models of cancer‐associated fibroblast heterogeneity uncover subtype‐specific effects of CRISPR perturbations

open access: yesMolecular Oncology, EarlyView.
Development of therapies targeting cancer‐associated fibroblasts (CAFs) necessitates preclinical model systems that faithfully represent CAF–tumor biology. We established an in vitro coculture system of patient‐derived pancreatic CAFs and tumor cell lines and demonstrated its recapitulation of primary CAF–tumor biology with single‐cell transcriptomics ...
Elysia Saputra   +10 more
wiley   +1 more source

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