Results 71 to 80 of about 32,478 (295)
, 2011 Although vacuum arcs were first identified over 110 years ago, they are not yet well understood. We have since developed a model of breakdown and gradient limits that tries to explain, in a self-consistent way: arc triggering, plasma initiation, plasma evolution, surface damage and gra- dient limits.
arxiv +1 more source
Electrooxidation of Anhydrous Glycerol: Kinetics and Selectivity
ChemElectroChem, EarlyView.This work investigates glycerol electrooxidation in anhydrous conditions to narrow down the range of possible products. Preferential oxidation of glycerol to glyceraldehyde was achieved via homogeneous but not heterogeneous catalytic pathways. Further improvements in the redox mediator and catalyst design are needed to improve the performance.As a by ...
Laela Ezra +4 more
wiley +1 more source
Novel Microwave Plasma Source for Plasma Chemistry in Gases
Chemie Ingenieur Technik, EarlyView.A new microwave plasma source for plasma gas chemistry is introduced. Microwave energy is specifically coupled into defined gas volumes to activate chemically internal compounds such as N2, CO2 or H2O. The activation of N2 and the conversion of CO2 to CO are given as examples.
Andreas Schulz +6 more
wiley +1 more source
Arc Interference Behavior during Twin Wire Gas Metal Arc Welding Process
Advances in Materials Science and Engineering, 2013 In order to study arc interference behavior during twin wire gas metal arc welding process, the synchronous acquisition system has been established to acquire instantaneous information of arc profile including dynamic arc length variation as well as ...
Dingjian Ye, Xueming Hua, Yixiong Wu
doaj +1 more source
Investigating the ability of deep learning to predict Welding Depth and Pore Volume in Hairpin Welding [PDF]
arXiv, 2023 To advance quality assurance in the welding process, this study presents a deep learning DL model that enables the prediction of two critical welds' Key Performance Characteristics (KPCs): welding depth and average pore volume. In the proposed approach, a wide range of laser welding Key Input Characteristics (KICs) is utilized, including welding beam ...
arxiv
Deep Underground Science and Engineering, EarlyView.A 9‐year study on the deformation and stability problem of the large deep underground cavern in Baihetan power station was carried out. Abstract The big underground powerhouse cavern of the China Baihetan hydropower plant is 438 m long, 34 m wide, and 88.7 m high.
Lifang Zou +5 more
wiley +1 more source
Real time error detection in metal arc welding process using Artificial Neural Netwroks [PDF]
arXiv, 2016 Quality assurance in production line demands reliable weld joints. Human made errors is a major cause of faulty production. Promptly Identifying errors in the weld while welding is in progress will decrease the post inspection cost spent on the welding process.
arxiv
Deep Underground Science and Engineering, EarlyView.Different failure modes observed in Tishreen tunnel include Floor heave, wall spalling, crashing of slab, and lining convergence reaching the failure limit. Abstract Squeezing phenomena can lead to severe loads in deep tunnels, especially in the presence of a low ratio of surrounding rock strength to overburden pressure.
Mohannad Mhanna, Hussein Hadi Hussein
wiley +1 more source
Microstructural evolution of a low-alloy steel / nickel superalloy dissimilar metal weld during post-weld heat treatment [PDF]
arXiv, 2019 The microstructural evolution of a dissimilar metal weld (DMW) obtained by narrow-gap gas tungsten arc welding (NG-GTAW) was investigated after it was subjected to a post-weld heat treatment (PWHT). The case studied here is a joint between low-alloy steel pipes and a stainless steel steam generator using a nickel based alloy as filler material.
arxiv
Advancing aqueous zinc‐ion batteries with carbon dots: A comprehensive review
EcoEnergy, EarlyView.Carbon dots (CDs), with their distinctive structure and superior electrochemical properties, represent an innovative class of carbon‐based materials with broad potential applications for optimizing aqueous zinc‐ion batteries (AZIBs) performance. This comprehensive review highlights the potential application of CDs in AZIBs.
Mingying Chen +7 more
wiley +1 more source