Results 251 to 260 of about 136,212 (303)
Some of the next articles are maybe not open access.
Quantum coupled oscillators versus forced oscillator
Journal of Optics B: Quantum and Semiclassical Optics, 2001We compare the time evolutions of two quantum systems: a quantum harmonic oscillator driven by a classical force and two coupled quantum harmonic oscillators. We find the conditions under which the first system can be considered as a `mean-field approximation' to the second one.
A S M de Castro, V V Dodonov
openaire +1 more source
2014
Forced oscillation technique (FOT) is a noninvasive approach for assessing the mechanical properties of the respiratory system. The technique is based on applying a low-amplitude pressure oscillation to the airway opening and computing respiratory impedance defined as the complex ratio of oscillatory pressure and flow. Impedance data are interpreted in
Daniel Navajas +2 more
openaire +1 more source
Forced oscillation technique (FOT) is a noninvasive approach for assessing the mechanical properties of the respiratory system. The technique is based on applying a low-amplitude pressure oscillation to the airway opening and computing respiratory impedance defined as the complex ratio of oscillatory pressure and flow. Impedance data are interpreted in
Daniel Navajas +2 more
openaire +1 more source
External noise synchronizes forced oscillators
Physical Review E, 2001Periodic pulsatile perturbation of nonlinear oscillators generates phase-locking, quasiperiodic, and chaotic responses. This work shows that the application of external noise to ensembles of such forced systems can synchronize oscillations, even in regimes where neither the noise nor the periodic forcing, when applied alone, would lead to such a ...
K, Pakdaman, D, Mestivier
openaire +2 more sources
Forced oscillations of DNA bases
Biophysics, 2016This paper presents the results of the studying of forced angular oscillations of the DNA bases with the help of the mathematical model consisting of two coupled nonlinear differential equations that take into account the effects of dissipation and the influence of an external periodic field. The calculation results are illustrated for sequence of gene
L V, Yakushevich, L A, Krasnobaeva
openaire +2 more sources
Forced oscillation experiments
Philosophical Transactions of the Royal Society of London. Series A: Physical and Engineering Sciences, 1991Forced oscillation experiments with scale models are carried out to determine hydrodynamic characteristics of ships, with respect to motions in waves or steering and manoeuvring qualities. Depending on the considered motion components, in a horizontal or vertical plane, various methods are used to induce forced oscillations which are discussed briefly.
openaire +1 more source
Forced oscillations of a self-oscillating surface reaction
Physical Review Letters, 1988Oxydation catalytique de CO sur une face (110) de Pt, sous des conditions permettant une cinetique oscillante stable autoentretenue.
, Eiswirth, , Ertl
openaire +2 more sources
BISTABILITY OF HARMONICALLY FORCED RELAXATION OSCILLATIONS
International Journal of Bifurcation and Chaos, 2002Relaxation oscillations appear in processes which involve transitions between two states characterized by fast and slow time scales. When a relaxation oscillator is coupled to an external periodic force its entrainment by the force results in a response which can include multiple periodicities and bistability.
Phillipson, Paul E., Schuster, Peter
openaire +2 more sources
Clinical Application of Forced Oscillation
Pulmonary Pharmacology & Therapeutics, 2001This review summarizes current clinical use of the forced oscillation technique (FOT) for analysis of lung function. It presents an intuitive approach to FOT pattern recognition for interpretation of results in human subjects, and the view that FOT is now well established and, clinically, eminently useful in patients with airflow obstruction. The focus
openaire +2 more sources
Forced Oscillations of Extensible Beams
SIAM Journal on Mathematical Analysis, 1985The oscillatory behaviour of solutions of the equation \[ \frac{\partial^ 2u}{\partial t^ 2}+\alpha \frac{\partial^ 4u}{\partial x^ 4}-(\beta -\gamma \int^{L}_{0}(\frac{\partial u(\xi,t)}{\partial \xi})^ 2 d\xi)\frac{\partial^ 2u}{\partial x^ 2}+c(x,t,u)=f(x,t) \] ((x,t)\(\in (0,L)\times (0,\infty))\) is studied.
openaire +1 more source
Second Order Nonlinear Forced Oscillations
SIAM Journal on Mathematical Analysis, 1988The author considers the following nonlinear differential equation (1) \(x''+a(t)f(x)=g(t),\) \(t\in [0,\infty)\), where a,g are real piecewise continuous functions on \([0,\infty)\); f is continuous and nondecreasing function in \((-\infty,\infty)\); \(xf(x)>0\) for \(x\neq 0\); \(h\in C^ 2[0,\infty)\), \(h''(t)=g(t)\) and that h(t) is oscillatory ...
openaire +2 more sources