Results 21 to 30 of about 408,211 (219)

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

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

Fatigue Crack Evaluation with the Guided Wave–Convolutional Neural Network Ensemble and Differential Wavelet Spectrogram

Sensors, 2021
On-line fatigue crack evaluation is crucial for ensuring the structural safety and reducing the maintenance costs of safety-critical systems. Among structural health monitoring (SHM), guided wave (GW)-based SHM has been deemed as one of the most ...
Jian Chen, Wenyang Wu, Yuanqiang Ren, Shenfang Yuan   +3 more
doaj   +1 more source

Vibration Response Evaluation under Shock-Type Loading with Emphasis on Finite Element Model Updating

Shock and Vibration, 2020
In some cases, impulse- or shock-type excitations as the dynamic loading are inevitable, and obtaining proper response with the well-known numerical methods is not easy. This paper focuses on dynamic response estimation against short-time loading with an
Jalal Akbari, Leila Nazari, Samaneh Mirzaei   +2 more
doaj   +1 more source

Acoustic emission activity and damage evolution characteristics of marble under triaxial stress at high temperatures

Rock and Soil Mechanics, 2021
In order to reveal the fracture development and damage evolution law of marble under the influence of temperature, the deformation and failure characteristics and acoustic emission activity of marble under the conditions of 30, 60, 90, 120 ℃ and 150 ...
LI Hao-ran, WANG Zi-heng, MENG Shi-rong, ZHAO Wei-gang, CHEN Feng   +4 more
doaj   +1 more source

The Impact of the COVID‐19 Pandemic on Childhood Cancer Survival: A Population‐Based Assessment of Survival Patterns Between 2015 and 2023 in Germany

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Numerous international studies have reported declines in new cancer diagnoses, delayed diagnoses and disruptions in cancer treatment following the implementation of COVID‐19 pandemic public health measures, raising concerns that these effects may ultimately contribute to increased cancer mortality.
Friederike Erdmann, Maike Wellbrock, Javier Louro, Arndt Borkhardt, Martin Schrappe, Claudia Trübenbach, Desiree Grabow, Cécile M. Ronckers, Joachim Schüz   +8 more
wiley   +1 more source

Guided Wave Characteristic Research and Probabilistic Crack Evaluation in Complex Multi-Layer Stringer Splice Joint Structure

Sensors, 2023
Multi-layer and multi-rivet connection structures are critical components in the structural integrity of a commercial aircraft, in which elements like skin, splice plate, strengthen patch, and stringer are fastened together layer by layer with multiple ...
Jian Chen, Yusen Xu, Shenfang Yuan, Zhen Qin   +3 more
doaj   +1 more source

Chemotherapy for Spinal Cord Intramedullary Pediatric Low‐Grade Glioma—A Systematic Literature Review

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric intramedullary low‐grade gliomas (PIMLGGs) are rare neoplasms that present unique clinical and management challenges. Although surgery remains the primary tool for tissue diagnosis and decompression, complete gross‐total resection is frequently unfeasible due to the infiltrative nature of these lesions.
Olga M. Sergeenko, Segev Gabay, Jonathan Roth, Amit Ringel, Rina Dvir, Shlomi Constantini   +5 more
wiley   +1 more source

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

FEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto, Masatomo So, Ayako Furukawa, Kenji Sugase   +3 more
wiley   +1 more source