Results 21 to 30 of about 14,554,155 (235)
Remote Sensing, 2023 To calibrate airborne gravity gradiometers currently in development in China, it is urgent to build an airborne gravity gradiometer test site. The site’s selection depends on the preknowledge of high-resolution gravity and gradient structures.
Meng Yang +5 more
doaj +1 more source
Acoustic Source Characterization of Marine Propulsors
Journal of Marine Science and Engineering, 2022 Marine propulsors represent one of the most important contributors among anthropogenic sounds radiated into water. Blade based propulsors, e.g., propellers, generate tones at the blade passing frequency and its harmonics, especially in cavitating ...
Jukka Tanttari, Antti Hynninen
doaj +1 more source
Equivalent Permeability of Step-Lap Joints of Transformer Cores: Computational and Experimental Considerations [PDF]
, 2011 The paper develops an efficient computational method for establishing equivalent characteristics of magnetic joints of transformer cores, with special emphasis on step-lap design.
Napieralska-Juszczak, E. +14 more
core +2 more sources
A Fast Iterative Shrinkage/Thresholding Algorithm via Laplace Norm for Sound Source Identification
IEEE Access, 2020 As a powerful tool, near-field acoustical holography (NAH) recognizes the sound source effectively. The traditional equivalent source method (ESM) calculated by the Tikhonov regularization method could be available in the low-frequency band.
Linsen Huang +4 more
doaj +1 more source
Compatibility of high-altitude aeromagnetic and satellite-altitude magnetic anomalies over Canada [PDF]
, 2002 Results from equivalent-source distributions derived jointly from high-altitude (average 4 km) aeromagnetic and Magsat-derived (average 400 km) magnetic anomalies over Canada indicate that long-wavelength components (500–2500 km) in these fields are ...
Ravat, D. +4 more
core +1 more source
Accurate Extraction of Noise Source Impedance of an SMPS Under Operating Conditions [PDF]
, 2010 An accurate measurement method to extract the common mode (CM) and the differential mode (DM) noise source impedances of a switched mode power supply (SMPS) under its operating condition is developed and validated.
See, Kye Yak +9 more
core +1 more source
Measurement + Control, 2023 In order to solve the problems of spatial resolution limit and reduce the measurement cost, the compressive sensing theory and the sparse regularization are applied to the near-field acoustic holography (NAH) technology.
Wen-Qian Jing, Guang-Sheng Liu
doaj +1 more source
The equivalent fundamental-mode source [PDF]
, 1996 In 1960, Hansen analyzed the problem of assembling fissionable material in the presence of a weak neutron source. Using point kinetics, he defined the weak source condition and analyzed the consequences of delayed initiation during ramp reactivity ...
Busch, R. D. +3 more
core +1 more source
Sound field separation with cross measurement surfaces. [PDF]
PLoS ONE, 2018 With conventional near-field acoustical holography, it is impossible to identify sound pressure when the coherent sound sources are located on the same side of the array.
Jin Mao, Jinfu Du
doaj +1 more source
An equivalent source method for modelling the global lithospheric magnetic field [PDF]
Geophysical Journal International, 2015 We present a new technique for modelling the global lithospheric magnetic field at Earth’s surface based on the estimation of equivalent potential field sources. As a demonstration we show an application to magnetic field measurements made by the CHAMP satellite during the period 2009–2010 when it was at its lowest altitude and solar activity was quiet.
Kother, Livia Kathleen +3 more
openaire +3 more sources