Results 21 to 30 of about 22,588 (266)

STDC‐Flow: large displacement flow field estimation using similarity transformation‐based dense correspondence

IET Computer Vision, 2020
In order to improve the accuracy and robustness of optical flow computation under large displacements and motion occlusions, the authors present in this study a large displacement flow field estimation approach using similarity transformation‐based dense
Congxuan Zhang, Zhen Chen, Fan Xiong, Wen Liu, Ming Li, Liyue Ge   +5 more
doaj   +1 more source

Ultrasonic arrays for quantitative nondestructive testing an engineering approach

, 2022
S.145-158The Ultrasonic Pulse-Echo inspection method is extremely capable of detecting cracks that limit the structural integrity of loaded technical components and systems. However, the applied principles of ultrasonic material testing do not in general
Dyakina, M., Soldatov, Alexey I., Kröning, Michael, Zhantlessov, Yerbol, Reddy, Krishna Mohan, Bolotina, Irina, Mohr, Friedrich   +6 more
core   +1 more source

Imaging of vertical surface-breaking cracks in concrete members using ultrasonic shear wave tomography

Scientific Reports, 2023
Surface-breaking cracks in concrete pose a significant threat to the durability of built structures. They create pathways for an accelerated moisture intrusion, and the transport of environmental and chemical agents such as chloride ions, which in turn ...
Sai Teja Kuchipudi, Sergey Pudovikov, Herbert Wiggenhauser, Debdutta Ghosh, Ute Rabe   +4 more
doaj   +1 more source

X-FASNet: cross-scale feature-aware with self-attention network for cognitive decline assessment in Alzheimer's disease

Frontiers in Neurology
Early diagnosis of Alzheimer's disease is critical for effective therapeutic intervention. The progressive nature of cognitive decline requires precise computational methods to detect subtle neuroanatomical changes in prodromal stages.
Wenhui Chen, Shunwu Xu, Yiran Peng, Yiran Peng, Hong Zhang, Jian Zhang, Huaihao Zheng, Hao Yan, Zhaowen Chen, Zhaowen Chen   +9 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Nondestructive Testing of Ceramic Automotive Valves

, 2022
S.443-448Automotive valves made out of silicon nitride were investigated by various nondestructive testing techniques. Fluorescent dye penetrant testing was used to detect surface defects. High frequency ultrasound (80 MHz) was employed to test the valve
Shi, Y., Netzelmann, U., Maisl, M., Wang, J., Reiter, H.   +4 more
core  

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Nondestructive Testing with 3MA—An Overview of Principles and Applications

Applied Sciences, 2019
More than three decades ago, at Fraunhofer IZFP, research activities that were related to the application of micromagnetic methods for nondestructive testing (NDT) of the microstructure and the properties of ferrous materials commenced.
Bernd Wolter, Yasmine Gabi, Christian Conrad   +2 more
doaj   +1 more source

Optical Phenomena in Mesoscale Dielectric Particles

Photonics, 2021
During the last decade, new unusual physical phenomena have been discovered in studying the optics of dielectric mesoscale particles of an arbitrary three-dimensional shape with the Mie size parameter near 10 (q~10).
Oleg V. Minin, Igor V. Minin
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source