Results 251 to 260 of about 439,956 (300)

A CONSTANT FREQUENCY OSCILLATOR

Review of Scientific Instruments, 1930
The frequency of a vacuum tube oscillator depends not only upon the constants of the oscillating circuit but also upon those of the tube itself. In a tuned plate circuit, operating with minimum coupling the influence of the tube on frequency depends only on its plate resistance, and decreases as the plate resistance is increased.
Carl W. Miller, Howard L. Andrews
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Nonlinear oscillations in a constant gravitational field

Physica Scripta, 2022
Abstract Exploring non-linear oscillations is a challenging task since the related differential equations cannot be directly solved in terms of elementary functions. Thus, complicated mathematical or numerical methods are usually employed to find accurate or approximate expressions that describe the behavior of ...
S V Kontomaris, A Malamou
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Constant modulus alloys for mechanical oscillators

Metallurgical Transactions A, 1979
A survey is given of the origins of constant modulus behavior in certain ferro- and antiferromagnetic alloys. All contributions to the modulus anomaly (ΔE) result from magnetic ordering. In the Fe-Ni system various influences are studied in detail; Ternary alloying elements, precipitation hardening process, cold reduction and final thermal treatment ...
Wolfgang Schneider, Hans Thomas
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Constant Frequency Oscillators*

Bell System Technical Journal, 1931
The manner in which the frequency of vacuum tube oscillators depends upon the operating voltages is discussed. The theory of the dependence is derived and is shown to indicate methods of causing the frequency to be independent of the operating voltages. These methods are applied in detail to the more commonly used oscillator circuits. Experimental data
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Characterization of Constant Flow-Driven Microfluidic Oscillator

Journal of Microelectromechanical Systems, 2020
Development of microfluidic circuits that are analogous to electronic circuits is useful because of their potential to drastically reduce dynamic off-chip controllers. In microfluidic circuits, a microfluidic oscillator that converts constant input to pulsatile output is the key component.
Zhenglin Li, Sung-Jin Kim
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Analysis and synthesis of piecewise-constant oscillators

The 2004 47th Midwest Symposium on Circuits and Systems, 2004. MWSCAS '04., 2004
In this paper, piecewise constant systems whose vector fields are piecewise constant, namely that the righthand side of the state equation is piecewise constant, are considered. Because of piecewise-constant characteristics, the states move proportionally to time except at the moment that vector fields switches, and the trajectories are piecewise ...
T. Tsubone, N. Kambayashi
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Piecewise-constant oscillators and their applications

2016
The analysis of nonlinear phenomena in continuous-time dynamics is one of important topics in the field of engineering, and it has attracted many researchers in recent years. The researchers have tried to solve this problem by simplifying the nonlinear dynamics.
Tadashi Tsubone, Keisuke Suzuki, Takahiro Aoki   +2 more
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Noncommuting contractions of oscillators with constant force

Journal of Physics A: Mathematical and General, 2006
We find two noncommuting contractions of the Lie algebras u(N) and gl(N, ), realized as the symmetry algebras of N-dimensional isotropic harmonic and repulsive oscillators of spring constant k ∈ , with a constant force of magnitude f . The contraction limit to the symmetry algebra of the Ndimensional free system is (k, f ) → (0, 0). We take two paths
Jamil Daboul, Kurt Bernardo Wolf
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Asymmetric linear oscillator and fine-structure constant

Physics Letters A, 1988
Abstract A detailed analysis of the quantum asymmetric harmonic oscillator leads us to argue a possible connection between the asymmetry of the system and electromagnetic interaction. This conjecture can be put in a quantitative form by deriving a numerical value remarkably close to that of the fine-structure constant.
Bruno Crosignani, Paolo Di Porto
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Coupling constant analyticity for the anharmonic oscillator

Annals of Physics, 1970
Abstract We study the analytic properties of the singular perturbation theory for p2 + x2 + βx4. We prove rigorously several of the properties of the energy levels, previously found by C. Bender and T. T. Wu using methods of unknown validity. In particular: (a) En(β) has a “global” third-order branch point at β = 0, i.e., any path of continuation ...
Barry Simon, A Dicke
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