Results 21 to 30 of about 1,129,305 (370)
Acousto-electrical speckle pattern in Lorentz force electrical impedance tomography [PDF]
, 2015 Ultrasound speckle is a granular texture pattern appearing in ultrasound imaging. It can be used to distinguish tissues and identify pathologies. Lorentz force electrical impedance tomography is an ultrasound-based medical imaging technique of the tissue
Catheline, Stefan +7 more
core +3 more sources
Estimation of acoustic impedance from seismic data using temporal convolutional network [PDF]
SEG technical program expanded abstracts, 2019 In exploration seismology, seismic inversion refers to the process of inferring physical properties of the subsurface from seismic data. Knowledge of physical properties can prove helpful in identifying key structures in the subsurface for hydrocarbon ...
Ahmad Mustafa +2 more
semanticscholar +1 more source
Acoustics, 2023 A comparison is considered of the experimentally obtained impedance of locally reacting acoustic liner samples with the impedance calculated using semi-empirical Goodrich, Sobolev and Eversman models. The semi-empirical impedance models are outlined.
Vadim Palchikovskiy +3 more
doaj +1 more source
, 2020 The precise characterization of reservoir parameters is vital for future development and prospect evaluation of oil and gas fields. C-sand and B-sand intervals of the Lower Goru Formation (LGF) within the Lower Indus Basin (LIB) are proven reservoirs ...
U. Ashraf +6 more
semanticscholar +1 more source
Evaluation of the acoustic impedance of a screen [PDF]
The Journal of the Australian Mathematical Society. Series B. Applied Mathematics, 1977 AbstractA direct numerical computation is provided for the impedance of a screen consisting of a regular array of slits in a plane wall. The problem is solved within the framework of oscillatory Stokes flow, and results presented as a function of porosity, frequency and viscosity.
C. Macaskill, E. O. Tuck
openaire +3 more sources
Impedance acoustic cloaking [PDF]
New Journal of Physics, 2010 The paper addresses a new approach to passive acoustic cloaking, which is an alternative to the well-known approach of transformation optics. It is shown first that the scattered acoustic field of a body is completely determined by special surface impedances defined at the body surface. The surface impedances of a non-scattering, i.e.
openaire +1 more source
Nihon Kikai Gakkai ronbunshu, 2019 A conventional method for acoustic impedance eduction in a flow duct is proposed. This method is based on the straight forward method. Assuming that a single mode propagates in the duct and the flow is uniform, propagation constants for both forward and ...
Tomonobu GOTO +7 more
doaj +1 more source
Brazilian Journal of Geology, 2020 The main reservoirs in the Linguado Field are grainstone and packstone carbonates composed of oolites, oncolites, pelloids, and rare bioclasts, of the Quissamã Formation (Albian-age) and coquinas of the Coqueiros Formation (Aptian-age).
Wagner Moreira Lupinacci +4 more
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JGE, 2020 Analysis of the physical properties of the sandstone reservoir in this study was carried out using the acoustic impedance inversion method and seismic multi-attribute which was carried out at the Bonaparte Basin "MNF" Field.
Muhammad Niko Febridon +2 more
doaj +1 more source
Prediction of the Absorption Characteristics of Non-Uniform Acoustic Absorbers with Grazing Flow
Applied Sciences, 2023 In this paper, planar and the cylindrical broadband non-uniform acoustic absorbers were constructed, both of which use broadband absorption units (BAUs) as their building blocks.
Yang Ou, Yonghui Zhao
doaj +1 more source