Results 21 to 30 of about 100,664 (303)
Helmholtz-Structured Two-Dimensional Super-Diffraction Meta-Lens
Frontiers in Physics, 2022 Focusing beyond the acoustic diffraction limit has always been expected, especially in acoustic imaging and ultrasonic therapy. Manipulating the acoustic waves beyond the diffraction limit offers an alternative application potential in high-resolution ...
He-He Li +8 more
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Resonant Airborne Acoustic Emission for Nondestructive Testing and Defect Imaging in Composites
Applied Sciences, 2021 A new version of an acoustic emission mode which is different from its traditional counterpart is discussed in view of applications for nondestructive testing.
Igor Solodov +2 more
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IEEE Access, 2023 High-frequency chest wall oscillation (HFCWO) therapy is one of the techniques to facilitate the draining of a patient’s lung secretion in pathological situations, and smart therapy with HFCWO devices equipped with multiple actuators can be ...
Chang Sheng Lee +4 more
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Influence of operational variables in a hydrodynamic bearing on the generation of acoustic emission [PDF]
, 2010 Detecting mechanical faults of rotating machines particularly in hydrodynamic bearings has been recognised as important for preventing sudden shut downs.
Mba, David +2 more
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SensorsMapping corrosion depths along pipeline sections using guided-wave-based tomographic methods is a challenging task. Accurate defect sizing depends heavily on the precision of the forward model in guided wave tomography.
Emiel Hassefras +2 more
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Low frequency acoustic source imaging method based on coprime position non-synchronous measurement
Tongxin xuebao, 2023 In order to solve the problem that the acoustic imaging resolution was low under the condition of low frequency and low SNR due to the limited microphone array aperture and element density, a high resolution imaging method of low frequency and low SNR ...
Juan WEI, Yutao HE, Fangli NING
doaj
Acoustic radiation force impulse imaging for differentiation of thyroid nodules
, 2012 Background: Acoustic Radiation Force Impulse (ARFI)-imaging is an ultrasound-based elastography method enabling quantitative measurement of tissue stiffness.
Stefan Zeuzem +29 more
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Addressing Non-Uniqueness in Guided Wave Tomography for Limited-View Corrosion Mapping
NDT - Journal of Non-Destructive TestingGuided wave tomography has proven to be an effective method for detecting pipeline corrosion, providing both location and quantitive estimates of wall thickness loss.
Emiel Hassefras +2 more
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Wavelet-Based Beamforming for High-Speed Rotating Acoustic Source
IEEE Access, 2018 In this paper, a novel wavelet-based beamforming approach is proposed for sensor arrays to produce acoustic images of high-speed rotating sources. First, the associated Green's function is developed based on the Morse wavelet which also accounts for the ...
Wangqiao Chen, Xun Huang
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Q-Compensated Gaussian Beam Migration under the Condition of Irregular Surface
Remote Sensing, 2023 The viscosity of actual underground media can cause amplitude attenuation and phase distortion of seismic waves. When seismic images are processed assuming elastic media, the imaging accuracy for the deep reflective layer is often reduced.
Jianguang Han +3 more
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