Results 281 to 290 of about 1,482,446 (314)

Asymmetric Generation of Acoustic Vortex Using Dual-Layer Metasurfaces.

Physical Review Letters, 2022
In this Letter, we introduce a new paradigm for achieving robust asymmetric generation of acoustic vortex field through dual-layer metasurfaces by controlling their intrinsic topologic charges and the parity of geometry design.
Yangyang Fu, Yuan Tian, Xiao Li, Shili Yang, You-wen Liu, Yadong Xu, Minghui Lu   +6 more
semanticscholar   +1 more source

Asymmetric two-electron excitations in atomic strontium and barium

Physical Review A, 1994
We present a general nonperturbative calculation of the photoionization cross section for highly asymmetrical two-electron systems. The calculations were performed using the eigenchannel [ital R]-matrix procedure together with multichannel quantum-defect theory, including the effects of long-range multipole interactions. The isolated-core approximation
, Wood, , Greene
openaire   +2 more sources

Selective Excitation with Asymmetric Adiabatic Pulses for NMR Spectroscopy

ChemPhysChem, 2014
AbstractExisting selective pulses are mainly constructed in the forms of classically shaped pulses, such as the Gaussian pulses, or generated by using numerical optimization methods. However, all of these pulses are highly sensitive to radiofrequency (RF) intensity variation, which means their performance is highly dependent on the accuracy and ...
Huawei, Liu, Shanmin, Zhang
openaire   +2 more sources

Excitation of the Laser wakefield by asymmetric chirped laser pulse in under dense plasma

Journal of Optics, 2023
Vivekanand Sharma, Sandeep Kumar, N. Kant, V. Thakur   +3 more
semanticscholar   +1 more source

Excitation of Phonon-Polaritons with Asymmetric Transient Grating

Japanese Journal of Applied Physics, 1997
In this study, we investigate asymmetric grating as a scheme for mapping the amplitude profile of an optical pulse onto a terahertz phonon-polariton in electrooptic crystals. The grating configuration is theoretically evaluated paying particular attention to the effect of spectral narrowing due to the spatial periodicity of the ...
Hitoshi Kawashima, Fumio Sasaki, Shunsuke Kobayashi Shunsuke Kobayashi, Toshiro Tani Toshiro Tani   +3 more
openaire   +1 more source

1/f thermally excited noise in asymmetric oscillators

2018 IEEE International Magnetics Conference (INTERMAG), 2018
Many physical systems and devices operate in a (quasi)static regime in contact with a thermal bath, which leads to fluctuating oscillations around the energy minimum. For linear systems, the spectrum of these oscillations replicates the resonance curve of a damped oscillator [1].
T. Pipathanapoompron, A. Stankiewicz, A. Grier, K. Subramanian, A. Kaewrawang   +4 more
openaire   +1 more source

Vibration of Harmonically Excited Oscillators With Asymmetric Constraints

Journal of Applied Mechanics, 1992
investigation is carried out for a class of piecewise linear oscillators with asymmetric characteristics. The damping and restoring forces are general trilinear functions of the system velocity and displacement, respectively, while the excitation is harmonic in time. First, an analysis is presented which determines harmonic and subharmonic steady-state
S. Natsiavas, H. Gonzalez
openaire   +1 more source

Metastable nonlinear vibrations: Third chaos of bistable asymmetric composite laminated square shallow shell under foundation excitation

, 2021
Tao Liu, Wen Zhang, M. Q. Wu, Yan-luan Zheng, Y. Zhang   +4 more
semanticscholar   +1 more source

Quantitative Analysis of Asymmetric Flux Reversal Permanent Magnet Linear Machine for Long Excursion Application

IEEE transactions on industrial electronics (1982. Print)
This article proposes two kinds of asymmetric flux reversal permanent magnet linear machine (AFR-PMLM) for long excursion application. By utilizing asymmetric permanent magnet excitation, the AFR-PMLM can effectively generate and fully exploit the second-
Yiming Shen, Zhaokai Li, Z. Zeng, Qinfen Lu, Christopher H. T. Lee   +4 more
semanticscholar   +1 more source

Some effects of asymmetric excitations on dipole radiators

IEEE Transactions on Antennas and Propagation, 1971
The recent model due to Shen, Wu, and King for the current distribution along the asymmetrically-driven thin cylindrical antenna is used in the calculation of current and far-field values for several cases of interest. The graphs show how the current distribution approaches the limiting sinusoidal assumption as the generator location is moved toward a ...
openaire   +1 more source