Results 1 to 10 of about 2,833,286 (119)

Parameter Optimization for the Induction Magnetometer of 10 kHz to 100 kHz

open access: yesIEEE Access, 2022
The induction magnetometers are widely applied for magnetotelluric detection due to the characteristics of wide frequency band, large detection depth range and small size.
Wenbin Li   +3 more
doaj   +1 more source

Design and Experiment of Magnetic Antenna Vibration and Noise Reduction System

open access: yesApplied Sciences, 2022
The magnetic antenna can receive extremely weak underwater magnetic signals, and induce the magnetic field intensity which can reach the femto-tesla (fT) level, making it widely used in underwater electromagnetic signal detection.
Sijie Jiang   +5 more
doaj   +1 more source

Global estimates of plasmaspheric losses during moderate disturbance intervals [PDF]

open access: yesAnnales Geophysicae, 2010
For a set of five moderate disturbance events, we calculate the total number of He+ ions removed the plasmasphere using calibrated global EUV images.
M. Spasojevic   +2 more
doaj   +1 more source

Research and Fabrication of Broadband Ring Flextensional Underwater Transducer

open access: yesSensors, 2021
At present, high-speed underwater acoustic communication requires underwater transducers with the characteristics of low frequency and broadband. The low-frequency transducers also are expected to be low-frequency directional for realization of point-to ...
Jiuling Hu   +5 more
doaj   +1 more source

Overcoming Periodic Stripe Noise in Infrared Linear Array Images: The Fourier-Assisted Correlative Denoising Method

open access: yesSensors, 2023
Infrared linear array detectors frequently experience vertical, low-frequency, and periodic stripe noise during imaging, stemming from electro-mechanical interference.
Weicong Chen, Bohan Li
doaj   +1 more source

Modeling of a Rope-Driven Piezoelectric Vibration Energy Harvester for Low-Frequency and Wideband Energy Harvesting

open access: yesMicromachines, 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

The Relevance of the Low-Frequency Sound Insulation of Window Elements of Façades on the Perception of Urban-Type Sounds

open access: yesBuildings, 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

Control method of magnetic resonant WPT maintaining stable transmission power with wide misalignment tolerance

open access: yesThe 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

Propagation Characteristics of Low Frequency Sound Energy in Range-Dependent Shallow Water Waveguides

open access: yesShanghai 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

Effect of Cavity Structure on Acoustic Characteristics of Phononic Crystals Based on Double-Layer Plates

open access: yesCrystals, 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

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