Results 11 to 20 of about 6,980,177 (302)
Micromachines, 2021 In this work, a mechanical model of a rope-driven piezoelectric vibration energy harvester (PVEH) for low-frequency and wideband energy harvesting was presented.
Jinhui Zhang +4 more
doaj +1 more source
Buildings, 2023 The sound insulation of the façade and its elements is a very important characteristic, as it largely determines the degree of sound protection of the building’s interior from external noise sources.
Daniel de la Prida +5 more
doaj +1 more source
The Journal of Engineering, 2019 Many applications of wireless power transmission (WPT) require high misalignment tolerance. However, the transmission power of WPT is highly susceptible to the misalignment.
Jinbo Zhao +11 more
doaj +1 more source
High-frequency Light Reflector via Low-frequency Light Control [PDF]
, 2015 We show that the momentum of light can be reversed via the atomic coherence created by another light with one or two orders of magnitude lower frequency.
Evers, Joerg +3 more
core +3 more sources
Low frequency interchanges [PDF]
Plasma Physics, 1970 A necessary stability criterion is derived for a class of selfconsistent low beta longtime guiding centre equilibria. This class is defined by some restrictions, viz. symmetry, zero electric field, small ratio of guiding centre drift velocities and diamagnetic velocities, and stability on the time scale of the longitudinal guiding centre motion.
openaire +6 more sources
Shanghai Jiaotong Daxue xuebao, 2021 In view of the low-frequency sound energy propagation in range-dependent waveguides in shallow water, in cylindrical coordinates, the sound energy flux is used as the study object based on the finite element method (FEM).
ZHU Hanhao, XIAO Rui, ZHU Jun, TANG Jun
doaj +1 more source
The Planck Low Frequency Instrument [PDF]
, 1999 The Low Frequency Instrument (LFI) of the "Planck Surveyor" ESA mission will perform high-resolution imaging of the Cosmic Microwave Background anisotropies at four frequencies in the 30-100 GHz range.
A. Mennella +8 more
core +2 more sources
Crystals, 2020 Localized resonance phononic crystals (LRPCs) are increasingly attracting scientists’ attention in the field of low-frequency noise reduction because of the excellent subwavelength band gap characteristics in the low-frequency band.
Chuanmin Chen +4 more
doaj +1 more source
International Journal of Preventive Medicine, 2022 Backround: Noise is one of the most important occupational and environmental health hazards. Exposure to loud noise can cause irrevocable hearing damage and loss of hearing.
Farhad Forouharmajd +4 more
doaj +1 more source
Journal of Research of the National Institute of Standards and Technology, 1993 A borehole tiltmeter with a sensitivity of a few nanoradians is described. It is composed of two orthogonal horizontal pendulums with free periods of 1 s. The pendulums are insensitive to barometric pressure fluctuations, and the measured temperature coefficient is less than 30 nrad/°C.
Kohl, M. L., Levine, J.
openaire +2 more sources