Results 31 to 40 of about 252 (152)

Defect recognition of circumferential welds of pipelines in TOFD images based on YOLOv5

Hanjie xuebao
In order to enhance defect recognition in time-of-flight diffraction (TOFD) scan images for circumferential welds of pipelines under conditions such as background signal interference and uneven sample distribution, an improved YOLOv5s network model was ...
Cheng XU, Shihao DONG, Zhengyu OU, Zandong HAN   +3 more
doaj   +1 more source

H2‐Driven Flavin Recycling Supports Biocatalytic Halogenation by Flavin‐Dependent Halogenase

ChemCatChem, Volume 18, Issue 2, 28 January 2026.
Use of a H2‐driven flavin recycling system based on the O2‐tolerant [NiFe] hydrogenase 1 from E. coli supports efficient halogenation catalyzed by the flavin‐dependent halogenase, PyrH. Operation under atmospheric H2 with controlled delivery of safe, low‐level O2 enables intensification of biocatalytic halogenation.
Jiayu Peng, Miguel A. Ramirez, Kylie A. Vincent   +2 more
wiley   +1 more source

Austenitic Biomaterial Cracks Evaluation by Advanced Nondestructive Techniques

Advances in Electrical and Electronic Engineering, 2017
The article deals with Non-Destructive Evaluation (NDE) of austenitic stainless steels. Eddy current, ultrasonic testing and non-contact magnetic field mapping methods are used for this purpose.
Milan Smetana, Vladimir Chudacik, Radoslav Konar, Milos Mician   +3 more
doaj   +1 more source

Sensitivity of near‐surface marine winds and wind stress in coastal Antarctica to regional atmospheric model configuration

Quarterly Journal of the Royal Meteorological Society, Volume 151, Issue 772, October 2025 Part A.
Marine winds near coastal Antarctica are important for sea‐ice variability and ocean circulation. We test the sensitivity of simulated winds to varying uncertain aspects of the atmospheric model configuration. Winds (each configuration a coloured solid line in the figure) are sensitive to model physics, and notably we find that wind stress over a ...
Thomas Caton Harrison, Adrian Lock, Thomas J. Bracegirdle, John C. King, Hua Lu, Alessandro Silvano   +5 more
wiley   +1 more source

Structural and Kinetics Studies of N^O‐, O^N^O‐, and N^N‐ Schiff Base Mn Complexes as Highly Active Catalysts in the Ring‐Opening Polymerization of rac‐Lactides

European Journal of Inorganic Chemistry, Volume 28, Issue 19, July 12, 2025.
Mononuclear and multinuclear manganese of (imino)phenol/pyridine proligands have been structurally characterized. The complexes form active catalysts in the ring‐opening polymerization of rac‐lactides to give predominantly atactic (poly)lactides with moderate molecular weights and good control of the polymer microstructure.
Mnqobi Zikode, Asanda Ngwenya, Tabea Becker, Sonja Herres‐Pawlis, Stephen. O. Ojwach   +4 more
wiley   +1 more source

Continuous ultrasonic thickness measurement technology

ITM Web of Conferences, 2017
The article describes the technologies and means of ultrasonic thickness measurement for pipeline base metal and welded joints using phased array antennas with linear scanning by TOFD and DAF methods.
Pronin Vitaliy, Shkatov Petr, Sandulyak Anna, Baskonus Haci Mehmet   +3 more
doaj   +1 more source

Analysis of the wind response to resolved versus parametrized turbulent orographic drag in high‐resolution simulations

Quarterly Journal of the Royal Meteorological Society, Volume 151, Issue 770, July 2025 Part A.
This study analyzes the impact of orographic drag on the lower atmosphere over moderately complex terrain using high‐resolution ICON simulations. Numerical simulations explore the effects of parametrizations over moderately complex terrain near the Perdigao experiment site and the Serra da Estrela mountain range by comparing km‐ and 100‐m‐scale ...
Julian Quimbayo‐Duarte, Juerg Schmidli, Martin Köhler, Linda Schlemmer   +3 more
wiley   +1 more source

Automated detection of weld defects in TOFD images for steel bridges using generative adversarial networks

Case Studies in Construction Materials
Time-of-flight diffraction (TOFD) has been widely adopted for weld defect detection in bridge steel quality assurance due to its harmlessness to the human body, real-time performance, and satisfactory detection accuracy.
Yanfeng Gong, Zihao Chen, Hong Zhang, Meng Xu, Wen Deng   +4 more
doaj   +1 more source

The Impact and Compression‐After‐Impact Behaviour of CFRP After Double Impacts in Different Locations

Strain, Volume 61, Issue 2, April 2025.
ABSTRACT The present paper investigates the low‐velocity impact behaviour and the compression‐after‐impact (CAI) behaviour of carbon‐fibre reinforced‐plastic (CFRP) composite panels after two impacts in different locations on a test coupon. The effect of changing the separation distance between the two impacts, as well as changing the impact energy, is
R. A. Brooks, J. Liu, A. M. Joesbury, L. T. Harper, H. Liu, B. R. K. Blackman, A. J. Kinloch, J. P. Dear   +7 more
wiley   +1 more source

Improving CO2 Fixation with Epoxides by Replacing Zirconium by Hafnium in UiO66 MOFs

ChemCatChem, Volume 17, Issue 5, March 6, 2025.
Substituting Zr⁴⁺ with Hf⁴⁺ in UiO66‐NH₂ functionalized with N,N'‐dicyclohexylcarbodiimide (DCC) and N,N'‐diisopropylcarbodiimide (DIC) significantly enhances CO₂ adsorption and catalytic activity. Hf‐based catalysts, UiO66(Hf)‐DCCBr and UiO66(Hf)‐DICBr, possess stronger Lewis acidity and oxophilicity leading to high TOFs and yields under 0.1 MPa CO₂ ...
Seyedeh Molood Masoom Nataj, Kaylee Ouellet, Serge Kaliaguine, Frédéric‐Georges Fontaine   +3 more
wiley   +1 more source