Results 281 to 290 of about 1,492,115 (344)
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Mechanical systems and signal processing, 2020
To resolve the tough issue of ultra-low frequency vibration isolation during neonatal transport, a new incubator with quasi-zero-stiffness (QZS) isolators is proposed.
Qiang Wang +3 more
semanticscholar +1 more source
To resolve the tough issue of ultra-low frequency vibration isolation during neonatal transport, a new incubator with quasi-zero-stiffness (QZS) isolators is proposed.
Qiang Wang +3 more
semanticscholar +1 more source
Ultra-low-frequency atmospherics
IRE International Convention Record, 2005The earth and the ionosphere together form a spherical-type resonant cavity. The natural frequency of this resonator was calculated by Schumann to be approximately 10 cps. In order to test this result, it was decided to determine experimentally whether or not there might actually exist in the atmosphere signals which would lie within this frequency ...
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Ultra low frequency waves in the magnetosphere
Space Science Reviews, 1970The behaviour of continuous pulsations pc 2–5 observed on the ground has been known for some time. They seldom occur at night, their amplitudes generally increase towards the auroral zones and the sense of rotation of their polarisation often agrees with surface waves on the magnetopause.
J.W. Dungey, D.J. Southwood
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IEEE/ASME transactions on mechatronics
Considering the limited vibration isolation performance of bionic structures under complex excitation environments, this work innovatively presents a cockroach-inspired structure (CIS) coupled with electromagnetic shunt damping (EMSD) for ultra-low ...
Bo Yan +5 more
semanticscholar +1 more source
Considering the limited vibration isolation performance of bionic structures under complex excitation environments, this work innovatively presents a cockroach-inspired structure (CIS) coupled with electromagnetic shunt damping (EMSD) for ultra-low ...
Bo Yan +5 more
semanticscholar +1 more source
Journal of Vibration and Control
This paper investigated on the ultra-low frequency carbody swaying (ULFCS) of a high-speed railway vehicle through field tests and numerical simulations.
Jianfeng Sun +5 more
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This paper investigated on the ultra-low frequency carbody swaying (ULFCS) of a high-speed railway vehicle through field tests and numerical simulations.
Jianfeng Sun +5 more
semanticscholar +1 more source
Vehicle System Dynamics, 2021
More intensive vibration reduction measures are necessary given increasing demands for urban rail transit vibration control. While the floating slab track system remains the most effective vibration isolation measure, a large vibration reduction blind ...
Liuchong Wang +5 more
semanticscholar +1 more source
More intensive vibration reduction measures are necessary given increasing demands for urban rail transit vibration control. While the floating slab track system remains the most effective vibration isolation measure, a large vibration reduction blind ...
Liuchong Wang +5 more
semanticscholar +1 more source
Ultra low frequency precordial movements—kinetocardiograms∗
The American Journal of Cardiology, 1959K I~ETOC~RDIOGRAMS are the graphic representation of ultra low frequency displacement precordial vibrations. The frequent! components of these motions usually lie between 1 and IO cycles per second; however, Fourier analysis has revealed higher frequencies present but of less significance.
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Radial seismic metamaterials with ultra-low frequency broadband characteristics
Journal of Physics D: Applied Physics, 2021The metamaterials applications for protecting buildings by manipulating seismic waves, such as nuclear power plants and ancient buildings protection, have garnered considerable attention.
Lixia Li +4 more
semanticscholar +1 more source
Myoelectric reactions to ultra-low frequency and low-frequency whole body vibration
European Journal of Applied Physiology and Occupational Physiology, 19885 healthy males were exposed to vertical sinusoidal whole body vibration (WBV) at 5 frequencies (F1 = 0.315 Hz, F2 = 0.63 Hz, F3 = 1.25 Hz, F4 = 2.5 Hz, F5 = 5.0 Hz) and 2 intensities (I1 = 1.2 ms-2 rms, F1-F5; I2 = 2.0 ms-2 rms, F2-F5). Erector spinae EMGs were derived at the levels of the first thoracic (T1) and third lumbar (L3) spinous processes ...
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Progress on Very/Ultra Low Frequency Mechanical Antennas
ES Materials & Manufacturing, 2021Mechanical antennas have attracted wide attention due to their outstanding properties of ultra small size and low power in existing long wave communications. Here, a review of progress on mechanical antennas used in very low frequency (VLF: 3 30 kHz) and
Shaolong Yang +7 more
semanticscholar +1 more source