Results 61 to 70 of about 1,363,017 (313)

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

On Short Circuit of Grid-Forming Converters Controllers: A glance of the Dynamic Behaviour [PDF]

, 2021
Power electronic converter (PEC) is an enabling technology for the energy transition, but the massive integration of PEC raises several issues. The use of Voltage source converters (VSCs) enabled with grid forming control offer a long-term solution of ...
Harold R. Chamorro, Acosta Montalvo, Martha N. (author), Mohammad Habibullah, Chamorro Vera, Harold Rene,, Francisco Gonzalez-Longatt, Chamorro, Harold R. (author), Habibullah, Mohammad, Jose Luis Rueda, Gonzalez-Longatt, Francisco (author), Habibullah, Mohammad (author), Palensky, P. (author), Peter Palensky, Acosta Montalvo, Martha N., Martha N. Acosta Montalvo, Gonzalez-Longatt, Francisco, Palensky, Peter, Rueda, José L. (author), Rueda, Jose Luis   +17 more
core   +1 more source

Comparison Study of the Wideband Oscillation Risk of MMC between Grid-Following and Grid-Forming Control

Energies
Currently, research on the small-signal stability of grid-forming converters under two control modes, grid-following and grid-forming, mainly focuses on low-level converters.
Yanjun Cheng, Jun Xie, Chuihui Zeng, Shiqi Yang, Haichang Sun, Liang Qin   +5 more
doaj   +1 more source

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

Advanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm, André B. Baldissera, Rainer Völkl, Uwe Glatzel   +3 more
wiley   +1 more source

Distributed ReStart: Nonconventional BlackStart Resources : RTDS Based Network Energization from Grid Forming Converters: Part 2 [PDF]

, 2022
This report summarizes the results achieved in investigating the use of grid-forming converters (GFC) control for black-start applications, as part of the Distributed ReStart project collaboration between SPEN and Iberdrola Innovation Middle East.
Burt, Graeme, Egea-Alvarez, Agusti, Ahmed, Khaled, Syed, Mazheruddin, Alassi, Abdulrahman, Feng, Zhiwang   +5 more
core  

AC-Side Impedance-Based Stability Assessment in Grid-Forming Modular Multilevel Converters

IEEE Access
Grid-forming converters can emulate the behavior of a synchronous generator through frequency droop control. The stability of grid-forming modular multilevel converters can be studied via the impedance-based stability criterion. This paper presents an ac-
Mehrdad Nahalparvari, Mohsen Asoodar, Staffan Norrga, Hans-Peter Nee   +3 more
doaj   +1 more source

Dual Grid-Forming Converter

IEEE Transactions on Power Systems
This letter proposes a dual model for grid-forming (GFM) controlled converters. The model is inspired from the observation that the structures of the active and reactive power equations of lossy synchronous machine models are almost symmetrical in terms of armature resistance and transient reactance. The proposed device is able to compensate grid power
openaire   +2 more sources

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

Agent-Based Virtual Organisations for the Grid [PDF]

, 2005
The ability to create reliable, scalable virtual organisations (VOs) on demand in a dynamic, open and competitive environment is one of the challenges that underlie Grid computing.
Michael Luck, Fiddian, N. J., Simon Thompson, Preece, Alun, Preece, A., W. T. Luke Teacy, Luck, Michael; id_orcid, Jigar Patel Luke, Nir Oren, Chalmers, S, Peter M. D. Gray, Patrick J. Stockreisser, Patel, Jigar, Jennings, NR, Gray, Peter M. D., Teacy, WTL, Preece, Alun David, Gray, PMD, Stockreisser, PJ, Gray, William Alexander, Nick J Fiddian, Gray, W. Alex, Chalmers, Stuart, W T Luke Teacy, Teacy, W. T. Luke, Stockreisser, Patrick J., Stockreisser, Patrick Jean, Shao, J, Gray, W. A., Nicholas R. Jennings, Jennings, Nicholas R., Chalmers, S., Oren, N, Thompson, Simon, Shao, J., Luck, M., Stockreisser, P. J., Shercliff, G., Stockreisser, P.J., Nick J. Fiddian, Gray, W.A., Fiddian, N.J., Fiddian, Nicholas John, Luck, M, Nicholas R Jennings, Preece, A, Luck, Michael, Jennings, N. R., Teacy, W.T.L., Shercliff, Gareth, Stuart Chalmers, W Alex Gray, Norman, Timothy, Jianhua Shao, Fiddian, Nick J., Patrick J Stockreisser, Patel, J, Shao, Jianhua, Norman, Timothy J., Patel, J., Thompson, S., Gareth Shercliff, Jigar Patel, Norman, TJ, Gray, P.M.D., Fiddian, NJ, Alun Preece, Shercliff, G, W. Alex Gray, Thompson, S, Timothy J. Norman, Gray, WA, Oren, Nir, Oren, N.   +73 more
core   +1 more source