Results 91 to 100 of about 643,568 (346)

直齿圆柱齿轮内部缺陷的超声自动检测

Jixie chuandong, 2013
The internal flaws in gearswhich occur during manufacturing and service have great effect on operation safety of equipments.A scheme of automatic ultrasonic testing based on the XYmotion platformis presented,and the corresponding automatic ultrasonic ...
吕铎, 杨岳, 李雄兵, 刘希玲
doaj  

In Situ Constructed Magnetic Core‐Shell Hydrogen‐Bonded Organic Framework‐on‐Metal–Organic Framework Structure: an Efficient Catalyst for Peroxymonosulfate Activation

Advanced Functional Materials, EarlyView.
In this work, a magnetic core‐shell catalyst (HOF‐on‐Fe3O4/ZIF‐67) is successfully synthesized, consisting of a metal–organic framework (ZIF‐67) with magnetic Fe3O4 as the core and a porous hydrogen‐bonded organic framework (HOF) as the shell. The catalyst efficiently activated peroxymonosulfate, resulting in rapid and effective removal of water ...
Yingying Du, Chenhui Ding, Chao Deng, Susanta Banerjee, Seema Agarwal   +4 more
wiley   +1 more source

Ultrasonic C-scan imaging of damage in the quefrency domain

, 2023
The ultrasonic pulse-echo method is well-known for the non-destructive inspection of materials. Setting a suitable time gate and searching for ultrasonic echoes, a C-scan image can be obtained in which defects are highlighted. However, such time domain analysis faces several challenges when inspecting multi-layer heterogeneous materials with complex ...
Yang, Xiaoyu, Kersemans, Mathias
openaire   +1 more source

Breast-Lesion Characterization using Textural Features of Quantitative Ultrasound Parametric Maps [PDF]

, 2017
© 2017 The Author(s). This study evaluated, for the first time, the efficacy of quantitative ultrasound (QUS) spectral parametric maps in conjunction with texture-analysis techniques to differentiate non-invasively benign versus malignant breast lesions.
A Ahmed, A Heindl, A König, A Sadeghi-Naini, A Sadeghi-Naini, A Sadeghi-Naini, A Sadeghi-Naini, A Sadeghi-Naini, A Sadeghi-Naini, AV Alvarenga, B Sigel, D Sengupta, E Feleppa, EJ Feleppa, EJ Feleppa, EJ Feleppa, EJ Feleppa, EJ Feleppa, F Davnall, FL Lizzi, FL Lizzi, FLL Lizzi, H Tadayyon, H Tadayyon, H Tadayyon, H Tadayyon, J Mamou, JPB O’Connor, K Polyak, KA Wear, KA Wear, KC Balaji, L Sannachi, LX Yao, M Vaidya, MJ Gerdes, ML Oelze, ML Oelze, ML Oelze, ML Oelze, ML Oelze, N Duric, N Sannomiya, R Natrajan, RJ Lavarello, RL Siegel, RM Haralick, S Chicklore, S Tan, T Cover, T Noritomi, TJ Larkin, V Goh, Y Labyed, Y Labyed, Y-Y Liao   +55 more
core   +2 more sources

Bias‐Free Highly Efficient and Stable Dye‐Sensitized Photoelectrochemical Cells via Cascade Charge Transfer

Advanced Functional Materials, EarlyView.
A buried‐junction DSPEC design is introduced that leverages cascade charge transfer to enhance efficiency, stability, and versatility. This approach facilitates effective charge transfer and minimizes recombination losses, leading to significant improvements.
Jun‐Hyeok Park, Kyounglim Kim, Jinyoung Lee, Sarang Kim, Gwangsu Yoon, So Yeon Yoon, Jeong Kyeong Lee, Ji‐Wook Jang, Tae‐Hyuk Kwon   +8 more
wiley   +1 more source

CODSTRAN: Composite durability structural analysis [PDF]

CODSTRAN (COmposite Durability STRuctural ANalysis) is an integrated computer program being developed for the prediction of defect growth and fracture of composite structures subjected to service loads and environments. CODSTRAN is briefly described with
Chamis, C. C., Smith, G. T.
core   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Nondestructive quantification of internal raster path for additively manufactured components via ultrasonic testing

Scientific Reports
This work investigates the viability of discerning the raster pattern of additively manufactured components using high frequency ultrasonic nondestructive testing. Test coupons were fabricated from poly cyclohexylenedimethylene terephthalate glycol using
Atik Amin, David A. Jack, Pruthul Kokkada Ravindranath, Trevor J. Fleck   +3 more
doaj   +1 more source

Inspection of composites using a computer-based real-time radiographic facility [PDF]

A radiographic inspection facility was developed at the NASA Lewis Research Center. The facility uses a digital computer to provide enhanced images in near real-time.
Roberts, E., Jr., Vary, A.
core   +1 more source

MnI‐Functionalized Covalent Organic Framework as Efficient Electrocatalyst for CO2 Reduction in a Catholyte‐Free Zero‐Gap Electrolyzer

Advanced Functional Materials, EarlyView.
This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies, Marcos Eduardo G. Carmo, Gonçalves J. Marrenjo, Stephan Reuther, Patrick Ganswindt, Antonio Otavio T. Patrocinio, Thomas Bein, Osmando F. Lopes, Jenny Schneider   +8 more
wiley   +1 more source