Results 101 to 110 of about 252 (152)

Efficient solvent-free amide synthesis via Ritter reaction catalyzed by a reusable Fe₃O₄/g-C₃N₄/ NTMPA nanocomposite. [PDF]

Sci Rep
Karimitabar H, Sardarian AR.
europepmc   +1 more source

Impact of Slowly Biodegradable COD and Loosely Bound Polymeric Substances Accumulation in High-Rate Activated Sludge: Implications for Bioflocculation and Organic Matter Harvesting. [PDF]

ACS ES T Eng
Fau Z, Azais A, Gillot S, Chazarenc F, Derlon N.   +4 more
europepmc   +1 more source

Tailored engineering of primary catalytic sites and secondary coordination spheres in metalloenzyme-mimetic MOF catalysts for boosting efficient CO₂ conversion. [PDF]

Chem Sci
Li J, Yang F, Yu B, Dai Z, Wei S, Wu Y, He L, Zhou F, Huang J, Liu YN.   +9 more
europepmc   +1 more source

Titanium metal-organic frameworks for photocatalytic CO₂ conversion through a cycloaddition reaction. [PDF]

Nanoscale Adv
Kegere J, Alneyadi SS, Paz AP, Siddig LA, Alblooshi A, Alnaqbi MA, Alzamly A, Greish YE.   +7 more
europepmc   +1 more source

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TOFD Echo Signal Processing to Achieve Superresolution

Russian Journal of Nondestructive Testing, 2021
It is proposed to use the method of maximum entropy (ME) and the method for constructing the AR model of the TOFD echo spectrum together with the method of splitting the spectrum to increase its resolution and, consequently, information content. The effectiveness of the approach proposed is demonstrated in model experiments. As a result, the resolution
E G Bazulin, Bazulin E G
exaly   +2 more sources

Applicability and applications of alternative TOFD techniques

Ultrasonics
Ultrasonic time-of-flight diffraction (TOFD) technique is applied to non-destructive testing in engineering, but the dead zone influences its applicable range. Alternative TOFD techniques adopt the indirect diffracted waves having long propagation times to decouple from the lateral wave and detect near-surface defects.
Shijie Jin, Zhongbing Luo
exaly   +3 more sources

An alternative Ultrasonic Time of Flight Diffraction (TOFD) method

NDT and E International, 2018
Abstract In this work an alternative TOFD method is presented, capable to detect and size defects in the inspected material with good precision. It was shown that the diffraction used in this technique is the most relevant signal among the longitudinal backwall and the shear backwall echoes, compared to other TOFD methods.
T Stepinski, T R Strohaecker
exaly   +2 more sources

FEM Analyses of the TOFD Technique in Unequal Thickness Component

Applied Mechanics and Materials, 2014
The time-of-flight diffraction (TOFD) technique is a new ultrasonic nondestructive testing method. It utilize the longitudinal diffraction signal that generated from the defects, we can confirm whether there is a discontinuity in butt weld by the analysis of diffracted waves.
Xiang Dai, Chao Lu, Ming Fang Zheng
exaly   +2 more sources

Ultrasonic TOFD Detection by Finite Element Simulation Method

Applied Mechanics and Materials, 2014
This paper investigated the ultrasonic mechanism of Time of Flight Diffraction (TOFD) by finite element analysis for the better applications of ultrasonic TOFD (Time of Flight Diffraction) detection technology. The welding steel plate with the artificial defects is used in the finite element analysis model.
Han Xin Chen, Shi Qi Yang
exaly   +2 more sources