Results 71 to 80 of about 4,852,085 (251)

A Deep Learning-Driven Framework for Real-Time Recognition and Quantification of Subway Tunnel Surface Defects Using High-Resolution Imaging

Urban Rail Transit
Subway tunnels, with their complex underground environment, frequently develop surface defects like cracks and water leakage over time. Traditional manual inspection methods are inadequate for current accuracy and efficiency needs.
Zunchao Ren, Yanyi Liu, Dukun Zhao, Yueji He, Junjie Zhang   +4 more
doaj   +1 more source

Dynamic Response of a Double-Beam System Subjected to a Harmonic Moving Load

Applied Sciences
The dynamic behavior of a double-beam configuration subjected to a harmonic moving load was studied in this paper. The model was built to represent the wheel–track system that was composed of two infinite Timoshenko beams joined by uniformly spaced ...
Mingfei Lu, Xuenan Wang, Hui Li
doaj   +1 more source

Appropriate Ventilation System for Control of Methane in Tunnels during Construction (A Case Study: Alborz Tunnel [PDF]

Background & Objectives: Different methods can be used for ventilation of tunnel during construction. Each method has advantages, limitations, and disadvantages that should be considered in selection of methods.
مختاری, سیداحمد, حضرتی, صادق, روحي راد, زهرا, جعفری, محمدجواد, عالیقدری, مرتضی, قراری, نورالدین   +5 more
core  

Full‐Field Damage Monitoring in Architected Lattices Using In situ Electrical Impedance Tomography

Advanced Functional Materials, EarlyView.
In situ electrical impedance tomography (EIT) turns 3D‐printed, CNT‐infused architected lattices into full‐field damage‐imaging systems. Tunable Voronoi‐based geometries act as active sensing architectures, enabling conductivity maps to detect early‐stage damage and localise sequential ligament fracture before catastrophic failure.
Akash Deep, Andrea Samore, Alistair McEwan, Andrew McBride, Shanmugam Kumar   +4 more
wiley   +1 more source

Study on the impact of vehicle-induced vibration on the flexural behavior of UHPC joints in widened bridges

Urban Lifeline
Bridge widening involves phased construction of adjacent structures to maintain uninterrupted traffic flow. This process exposes freshly placed longitudinal joints between staged deck constructions to vehicle-induced vibrations, potentially compromising ...
Jun Yang, Jingchen Leng, Jianting Zhou, Rui Chen, Kun Yu, Zhimei Jiang, Yang Zou, Zhongya Zhang, Jiang Du   +8 more
doaj   +1 more source

The Reliability of a Tunnel Boring Machine [PDF]

Greater levels of complexity in tunnelling with Tunnel Boring Machine (TBM) allow higher chances of fail-ures that may increase the potential hazardous risks. This paper presents the results of a study on TBM reliability using risk analysis.
جعفری, محمدجواد, قراری, نورالدین   +1 more
core  

Stabilization of Strongly Reduced Fe(I) Single Atom Species Coordinated in a 2D Self‐Assembled Metal–Organic Network

Advanced Functional Materials, EarlyView.
A graphene‐supported 2D metal–organic network stabilizes highly reactive Fe(I)‐N4 single sites through Co‐induced charge redistribution. Combined experiments and theory reveal Fe(I) formation, oxygen‐driven oxidation, and O2 activation mechanisms, offering a strategy to access low‐valent iron centers relevant to catalytic and biological processes ...
Alessandro Namar, Basant Roondhe, Michela De Col, Stefania Baronio, Matteo Jugovac, Mattia Scardamaglia, Eleanor Frampton, Nikolay Vinogradov, Paolo Giannozzi, Erik Vesselli   +9 more
wiley   +1 more source

Research status and new design concept of compressed air energy storage technology in abandoned mine

Meitan kexue jishu
Compressed air energy storage(CAES) can be widely used in power grid peak load shifting and large-scale new energy consumption. It has the advantages of large installed capacity, long service life, and clean environmental protection, and is regarded as ...
Hanpeng WANG, Yunhao WU, Bing ZHANG, Jianguo FAN, Mengtian LI, Jiancai SUI, Wei WANG, Dekang SUN   +7 more
doaj   +1 more source

NeuroVisio SyncPatch: A Skin‐Conformal Multimodal EMG–Motion Sensing Platform for Quantitative Neuromuscular Rehabilitation and Performance Monitoring

Advanced Healthcare Materials, EarlyView.
NeuroVisio SyncPatch integrates skin‐conformal electromyography (EMG) electrodes with camera‐tracked markers to jointly assess muscle activity and three‐dimensional knee kinematics during rehabilitation. Parallel feedback pathways provide real‐time kinematic guidance during movement and post‐trial neuromuscular feedback.
Bohyung Choi, Yoo‐Jin Jun, Heewon Choee, Kun‐Do Lee, Heesoo Kim, Yu Seok Hwang, Choong Yeon Kim, Seongok Chae, Juhyun Lee, Minkyu Je, Jae‐Woong Jeong, Hyung‐Soon Park   +11 more
wiley   +1 more source

A state-of-the-art review on loess tunnels

Journal of Traffic and Transportation Engineering (English ed. Online)
China's loess distribution area covers 640,000 km2, accounting for about 6.6% of its land area and about 4.9% of the world's total loess distribution area.
Jianxun Chen, Yanbin Luo, Yao Li, Shuai Yuan, Jiawei Xu, Jiading Wang, Shengjun Shao, Yasheng Luo, Ling Xu, Xuansheng Cheng, Xiong Qiao, Wenge Qiu, Mingnian Wang, Li Yu, Zhongsheng Tan, Zhanping Song, Qingguo Liang   +16 more
doaj   +1 more source