Results 21 to 30 of about 514,588 (251)
Visual geometry Group-UNet: Deep learning ultrasonic image reconstruction for curved parts.
Journal of the Acoustical Society of America, 2021 Detecting small defects in curved parts through classical monostatic pulse-echo ultrasonic imaging is known to be a challenge. Hence, a robot-assisted ultrasonic testing system with the track-scan imaging method is studied to improve the detecting ...
Yujian Mei +4 more
semanticscholar +1 more source
European review for medical and pharmacological sciences, 2023 The aim of this study is to assess the efficacy of hand and ultrasonic scaling and to evaluate the surface roughness on the root surface of periodontally involved teeth using a scanning electron microscope.A sample of 90 single-rooted teeth with a hopeless prognosis was selected for the study and divided into three separate groups.
Wasti, J. +11 more
openaire +2 more sources
Recent advances in the ultrasonic polar scan method for characterizing (degraded) fiber reinforced plastics [PDF]
, 2015 The ultrasonic polar scan (UPS) technique originated in the 1980's as a sophisticated method for inspecting composites. However, it is only in recent times that the true capabilities and strengths of the UPS methodology have been evidenced through ...
Degrieck, Joris +5 more
core +2 more sources
2D size, position and shape definition of defects by B-scan image analysis [PDF]
Fracture and Structural Integrity, 2015 The non-destructive evaluation of defects by automatic procedures is of great importance for structural components. Thanks to the developments of the non-contact ultrasonic techniques, the automation of the inspections is gaining a progressively ...
Michele Scafidi +2 more
doaj +2 more sources
Characterisation of contact pressure distribution in bolted joints [PDF]
, 2006 The quantification of contact area and pressure distribution in a bolted joint is essential information, as it determines the integrity of the coupling. Current bolted joint design standards are based on analytical solutions of the pressure distribution,
Arakawa +11 more
core +1 more source
A Sparse Reconstruction Algorithm for Ultrasonic Images in Nondestructive Testing
Sensors, 2015 Ultrasound imaging systems (UIS) are essential tools in nondestructive testing (NDT). In general, the quality of images depends on two factors: system hardware features and image reconstruction algorithms.
Giovanni Alfredo Guarneri +4 more
doaj +1 more source
Numerical simulations in support of the design of an ultrasonic device for sub-assembly identification [PDF]
EPJ Web of Conferences, 2021 In this paper, it is shown how numerical simulations can help designing an ultrasonic instrument operating in harsh conditions. To prevent fuel handling errors in sodium cooled fast reactors, the identification of fuel sub-assemblies using ultrasound is ...
Paumel Kevin +2 more
doaj +1 more source
Interaction of laser generated ultrasonic waves with wedge-shaped samples [PDF]
, 2012 Wedge-shaped samples can be used as a model of acoustic interactions with samples ranging from ocean wedges, to angled defects such as rolling contact fatigue, to thickness measurements of samples with non-parallel faces.
A. R. Clough +7 more
core +1 more source
Multiple wavemode scanning for near and far-side defect characterisation [PDF]
, 2020 The combination of ultrasonic inspections using different wavemodes can give more information than is available with single mode inspection. In this work, the response of shear and Rayleigh waves to surface-breaking defects propagating on the near-side ...
Edwards, R. S. (Rachel S.), Xiang, L.
core +1 more source
Non-linear enhancement of laser generated ultrasonic Rayleigh waves by cracks [PDF]
, 2008 Laser generated ultrasound has been widely used for detecting cracks, surface and sub-surface defects in many different materials. It provides a non-contact wideband excitation source which can be focused into different geometries.
Cann, B. +4 more
core +1 more source