Results 251 to 260 of about 302,487 (287)

Determination of the Dissipative Loss in Low-Loss Two-Ports

Conference on Precision Electromagnetic Measurements, 1988
The dissipative loss of a reciprocal two-port can be determined from its input reflection coefficients measured while terminating the output with load, short and open circuits, and sliding short. The paper presents a statistical approach applied to minimize random errors of the loss determination.
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Head loss coefficient of orifice plate energy dissipator

Journal of Hydraulic Research, 2010
Orifice plates as an effective energy dissipator have been used in hydropower projects. The head loss coefficient, relating directly to the energy dissipation ratio, is an important index of these elements. This coefficient and parameters such as the contraction ratio of the orifice plate diameter and the flood discharge tunnel diameter, the ratio of ...
Wu Jianhua, Ai Wanzheng, Zhou Qi
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Magnetic hysteresis and dissipative losses in superconducting films

Technical Physics Letters, 1997
An analysis is made of the response of thin-film superconductors to an oscillating magnetic field. The field strengths for defreezing and expulsion of the flux are determined. A hysteresis curve is plotted for the sample over the entire oscillation cycle of the magnetic field.
A. A. Elistratov, I. L. Maksimov
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Characterization of dissipative losses in microwave circuits

Microwave and Optical Technology Letters, 1994
AbstractThe analytical expression for the fractional power dissipated by a microwave circuit is derived in terms of the scattering parameters. Consideration is given to both complex and real port reference impedances. Theoretical values of fractional dissipated power, computed using a full‐wave analysis technique, are compared to experimentally ...
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Irreversibility curve and dissipative losses in YBaCO films

Low Temperature Physics, 1995
The susceptibility of polycrystalline and epitaxial YBCO films in weak exciting magnetic fields Hac = (0.1–1000) mOe is investigated by using the inductive technique. The behavior of their irreversibility curves (1-Tm/Tc) and the peak of dissipative losses is studied. Two characteristic fields H1* and H2* are observed for which the curves (1-Tm/Tc)(Hac)
V. A. Khokhlov, V. F. Drobot’ko
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DECAY PROPERTY OF REGULARITY-LOSS TYPE FOR DISSIPATIVE TIMOSHENKO SYSTEM

Mathematical Models and Methods in Applied Sciences, 2008
We study the decay property of the dissipative Timoshenko system in the one-dimensional whole space. We derive the L2 decay estimates of solutions in a general situation and observe that this decay structure is of the regularity-loss type. Also, we give a refinement of these decay estimates for some special initial data.
Ide, Kentaro, Haramoto, Kazuo, Kawashima, Shuichi   +2 more
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Dissipative loss in metamaterials and plasmonics

2012
We present a comparison of different conductors and their resulting dissipative loss when used in metamaterials and plasmonic systems. For resonant metamaterials, we derive a figure-of-merit for the performance of conducting materials, and we apply it to metals, conducting oxides, high-Tc superconductors and graphene.
Tassin, Philippe, Koschny, Thomas, Kafesaki, Maria, Soukoulis, Costas   +3 more
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Modeling Tire Energy Dissipation for Power Loss Calculations

SAE Technical Paper Series, 1981
<div class="htmlview paragraph">A mathematical formulation for calculating the energy dissipation in a steadily rolling tire is presented. The formulation uses a nonlinear constitutive equation for the viscoelastic stress response of the tire rubber.
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Energy dissipation and attenuation under high-loss conditions

British Journal of Applied Physics, 1966
The conventional relation Δ = π tan δ between free-vibration logarithmic decrement Δ and loss tangent or internal friction was shown by Parke to fail for high damping conditions. Here it is shown that the relation fails in the opposite direction to that found by Parke when Δ is a spatial decrement derived from attenuation of a plane wave travelling in ...
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Energy dissipation and attenuation under high-loss conditions

Journal of Physics D: Applied Physics, 1970
It was shown in 1966 by MacDonald that the conventional relation Λ=πtan δ between spatial logarithmic decrement and loss tangent fails for high damping conditions and that the exact relation reads Λ = 2πtan δ/2. This means that if one calculates tan δ from the spatial logarithmic decrement and then uses the conventional relation, a value is found for ...
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