Results 21 to 30 of about 7,467,907 (193)

Signature analysis on wheel-rail interaction for rail defect detection [PDF]

, 2008
Fibre Bragg Grating (FBG) sensors have been installed along an existing line for the purposes of train detection and weight measurement. The results show fair accuracy and high resolution on the vertical force acted on track when the train wheels are ...
K.H. Ho, Ho, Y.T., H.Y. Tarn, Tam, H.Y., T.K. Ho, K.Y. Lee, Wong, KK, Wong, K.K., Lee, KY, Liu, SY, Ho, S.L., Ho, TK, S.Y. Liu, Ho, T.K., Lee, K.Y., S.L. Ho, Tam, HY, Y.T. Ho, Ho, Tin Kin, Ho, K.H., K.K. Wong, Wong, Kwok Kam, Ho, KH, Liu, S.Y., Ho, SL, Ho, YT   +25 more
core   +1 more source

Research on steel rail surface defects detection based on improved YOLOv4 network

Frontiers in Neurorobotics, 2023
IntroductionThe surface images of steel rails are extremely difficult to detect and recognize due to the presence of interference such as light changes and texture background clutter during the acquisition process.MethodsTo improve the accuracy of ...
Zengzhen Mi, Ren Chen, Shanshan Zhao
doaj   +1 more source

Data fusion for defect characterisation using a dual probe system [PDF]

, 2008
We present recent work on a dual probe system containing electromagnetic acoustic transducers (EMATs) generating and detecting surface ultrasonic waves, and a pulsed eddy current (PEC) probe.
Dixon, S., Edwards, R.S., Sophian, Ali, Tian, G.Y., Edwards, R. S. (Rachel S.), Sophian, A., Tian, G. Y.   +6 more
core   +1 more source

The Rail Surface Defects Recognition via Operating Service Rail Vehicle Vibrations

Machines, 2022
Rail surface defects will not only bring wheel rail noise during train operation, but also cause corresponding accidents. Most of the existing detection methods are manual detection, which is time-consuming, laborious, inefficient, and subjective.
Shubin Zheng, Qianwen Zhong, Xieqi Chen, Lele Peng, Guiyan Cui   +4 more
doaj   +1 more source

Rail Surface Defect Detection Based on Image Enhancement and Improved YOLOX

, 2023
During the long and high-intensity railway use, all kinds of defects emerge, which often produce light to moderate damage on the surface, which adversely affects the stable operation of trains and even endangers the safety of travel.
Lifang Zhang, Wu Deng, Donglin Xu, Chunguang Zhang   +3 more
core   +1 more source

A Method for Detecting Surface Defects in Railhead by Magnetic Flux Leakage

Applied Sciences, 2021
With the rapid development of the world’s railways, rail is vital to ensure the safety of rail transit. This article focuses on the magnetic flux leakage (MFL) non-destructive detection technology of the surface defects in railhead.
Yinliang Jia, Shicheng Zhang, Ping Wang, Kailun Ji   +3 more
doaj   +1 more source

An end-to-end approach to detect railway track defects based on supervised and self-supervised learning

Results in Engineering
Railway infrastructure is critical for the safe and efficient transportation of goods and people. However, defects in rail tracks can lead to severe accidents, resulting in significant human and financial losses. This study presents the development of an
Muhammad Haroon, Muhammad Jawad Khan, Hammad M Cheema, Muhammad Tauseef Nasir, Muhammad Safdar, Shahid Ikram Ullah Butt   +5 more
doaj   +1 more source

Ambient‐Stable Transparent P‐Type CuI Transistors Via Room‐Temperature Pulsed Laser Deposition

Advanced Functional Materials, EarlyView.
An in situ PLD fabricated AlOx${\rm AlO}_x$/CuI/AlOx${\rm AlO}_x$ sandwich structure enables stable CuI TFTs with a field‐effect mobility of 2.3 ±$\pm$ 0.7 cm2${\rm cm}^{2}$ V−1${\rm V}^{-1}$ s−1${\rm s}^{-1}$ and excellent ambient stability. Complementary inverters based on CuI:Rb and ZnO:Al exhibit rail‐to‐rail voltage transfer characteristics and an
Yang Chen, Susanne Selle, Michael S. Bar, Michael Lorenz, Holger von Wenckstern, Marius Grundmann   +5 more
wiley   +1 more source

Neuromorphic Electronics for Intelligence Everywhere: Emerging Devices, Flexible Platforms, and Scalable System Architectures

Advanced Materials, EarlyView.
The perspective presents an integrated view of neuromorphic technologies, from device physics to real‐time applicability, while highlighting the necessity of full‐stack co‐optimization. By outlining practical hardware‐level strategies to exploit device behavior and mitigate non‐idealities, it shows pathways for building efficient, scalable, and ...
Kapil Bhardwaj, Roshni Satheesh Babu, Yuxin Xia, Eva Bestelink, Radu Sporea, Nikos Hastas, Ioannis Zeimpekis, Dimitra G. Georgiadou, Sayani Majumdar   +8 more
wiley   +1 more source

A Universal van der Waals Tunneling Injector for Monolayer CMOS

Advanced Materials, EarlyView.
A universal van der Waals injector unlocks polarity‐flexible tunneling contacts for monolayer CMOS. SnSe2, an intrinsically degenerate 2D semiconductor, establishes polarity‐specific band alignments with both WSe2 and MoS2 channels, enabling steep switching, high on/off ratios, and a unified route to low‐power 2D logic.
Hanbin Cho, Jing Huang, Seonguk Yang, Subin Im, Sangwoo Park, Jeongin Yeo, Sungyeon Kim, Gilhwan Do, Wenxuan Zhu, Soobeom Shin, Jongwon Lee, Yongjoon Shin, Do‐Sun Lee, Hu Young Jeong, Tae‐Eon Park, Jun Kang, Kyungmin Ko, Joonki Suh   +17 more
wiley   +1 more source