Results 31 to 40 of about 17,152,857 (276)

A Highly Integrated BOTDA/XFG Sensor on a Single Fiber for Simultaneous Multi-Parameter Monitoring of Slopes

Sensors, 2019
A highly integrated sensing technology, combining a stimulated Brillouin scattering-based distributed sensor with XFG (fiber Bragg grating (FBG) and long-period fiber grating (LPFG)) sensors on a single fiber, is proposed for the simultaneous measurement
Feng Li, Weigang Zhao, Hongbin Xu, Shupeng Wang, Yanliang Du   +4 more
doaj   +1 more source

Design of a Distributedly Active Morphing Wing Based on Digital Metamaterials

Aerospace, 2022
Morphing wings are a typical application of shape-adaptive structures in aviation, which play an important role in improving the comprehensive performance of an aircraft.
Zhigang Wang, Qi Wu, Yifei Lu, Panpan Bao, Yu Yang, Daochun Li, Xiasheng Sun, Jinwu Xiang   +7 more
doaj   +1 more source

Influence of Compaction Level on the Water-Heat-Vapor Characteristics of Unsaturated Coarse-Grained Fillings Exposed to Freezing and Thawing

Advances in Civil Engineering, 2020
Compaction level is an important control index to guarantee subgrade stability. Under freezing-thawing cycles, water-heat-vapor characteristics due to different compaction levels of unsaturated coarse-grained fillings of high-speed railway (HSR) subgrade
Yuzhi Zhang, An Wen, Weigang Zhao, Xiaojie Liang, Pei Li   +4 more
doaj   +1 more source

Acoustic Emission Monitoring of Fatigue Crack Growth in Mooring Chains

Applied Sciences, 2019
Offshore installations are subject to perpetual fatigue loading and are usually very hard to inspect. Close visual inspection from the turret is usually too hazardous for divers and is not possible with remotely operated vehicles (ROVs) because of the ...
Ángela Angulo, Jialin Tang, Ali Khadimallah, Slim Soua, Cristinel Mares, Tat-Hean Gan   +5 more
doaj   +1 more source

Experimental Study of Damage Development in Salt Rock under Uniaxial Stress Using Ultrasonic Velocity and Acoustic Emissions

Applied Sciences, 2018
Ultrasonic waves and acoustic emissions (AE) are important technologies to reveal rock damage. However, few studies have simultaneously monitored both types of data in the same experiment because of limitations on the experimental apparatus.
Haoran Li, Zhikai Dong, Yun Yang, Bo Liu, Mingyi Chen, Wenjun Jing   +5 more
doaj   +1 more source

Sensors for Structural Health Monitoring of Agricultural Structures [PDF]

Sensors, 2021
The health diagnosis of agricultural structures is critical to detecting damages such as cracks in concrete, corrosion, spalling, and delamination. Agricultural structures are susceptible to environmental degradation due to frequent exposure to water, organic effluent, farm chemicals, structural loading, and unloading.
Chrysanthos Maraveas, Thomas Bartzanas
openaire   +4 more sources

High Precision, Small Size and Flexible FBG Strain Sensor for Slope Model Monitoring

Sensors, 2019
In this paper, a soft fiber Bragg grating (FBG) strain sensor was constructed of a rubber strip, FBGs and steel plates, which exhibits the advantages of high precision and a small size.
Hongbin Xu, Xinyu Zheng, Weigang Zhao, Xu Sun, Feng Li, Yanliang Du, Bo Liu, Yang Gao   +7 more
doaj   +1 more source

Multi-Dimensional Uniform Initialization Gaussian Mixture Model for Spar Crack Quantification under Uncertainty

Sensors, 2021
Guided Wave (GW)-based crack monitoring method as a promising method has been widely studied, as this method is sensitive to small cracks and can cover a wide monitoring range.
Qiuhui Xu, Shenfang Yuan, Tianxiang Huang   +2 more
doaj   +1 more source

Fourier Series Approach for the Vibration of Euler–Bernoulli Beam under Moving Distributed Force: Application to Train Gust

Shock and Vibration, 2019
The dynamic response of an Euler–Bernoulli beam under moving distributed force is studied. By decomposing the distributed force into Fourier series and extending them to semi-infinite sine waves, the complex procedure for solving this problem is ...
Shupeng Wang, Weigang Zhao, Guangyuan Zhang, Feng Li, Yanliang Du   +4 more
doaj   +1 more source

MobileNetV3 for Pipeline Welding Defect Detection: A Computer Vision Approach on Noisy RGB Images [PDF]

E3S Web of Conferences
Weld defect detection plays a central role in pipeline inspection because it directly influences structural reliability and operational safety.Conventional manual inspection methods suffer from several limitations, including high labor demands ...
Moshayedi Ata Jahangir, Khan Amir Sohail, Zhang Ming Jun, Yang Shuxin, Bassir David   +4 more
doaj   +1 more source