Results 71 to 80 of about 674,158 (355)

Impact of Sub‐Grid Turbulent Orographic Form Drag on the Summer Monsoon Precipitation Simulation Over China [PDF]

, 2023
Chunlei Gu, Anning Huang, Xin Li, Ben Yang, Xu Zhou, Yang Wu   +5 more
openalex   +1 more source

Numerical explicit analysis of hole flanging by single-stage incremental forming [PDF]

, 2017
The use of Single-Point Incremental Forming (SPIF) technology in hole flanging operations using multi-stages strategies have been widely studied in the last few years. However, these strategies are very time-consuming, limiting its industrial application.
Borrego Puche, Marcos, Caballero, A., Centeno Báez, Gabriel, Martínez Donaire, Andrés Jesús, Morales-Palma, Domingo, Vallellano Martín, Carpóforo   +5 more
core   +1 more source

Design and Prototyping of Topology‐Optimized, Additively Manufactured Lightweight Components for Space Robotic Systems: A Case Study

Advanced Engineering Materials, EarlyView.
The results demonstrate a simulation‐driven workflow that applies LSB topology optimization with additive manufacturing constraints to mission‐specific load cases, integrating European Cooperation for Space Standardization compliant verification and manufacturability to develop structurally efficient rover suspension components.
Stelios K. Georgantzinos, Grigorios Kostopoulos, Eleni Papadopoulou, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria N. Gkara, Chara Ch. Mitropoulou, Georgios Kazakis, Alin Munteanu, Jeremi Gancet, Nikos D. Lagaros   +11 more
wiley   +1 more source

Immunity of Grid-Forming Control Without Energy Storage to Transient Changes of Grid Frequency and Phase

IEEE Open Journal of the Industrial Electronics Society
European grid operators in ENTSO-E and others with a significant amount of inverter-based generation are experiencing a reduction in system inertia and short-circuit power.
Norbert R. Klaes, Jens Fortmann
doaj   +1 more source

Controlled epitaxial graphene growth within amorphous carbon corrals [PDF]

, 2014
Structured growth of high quality graphene is necessary for technological development of carbon based electronics. Specifically, control of the bunching and placement of surface steps under epitaxial graphene on SiC is an important consideration for ...
Claire Berger, James Palmer, Jan Kunc, John Hankinson, Puybaret R., Tiberj A., Walt A. de Heer, Yang Y., Yike Hu, Zelei Guo   +9 more
core   +3 more sources

Nitride‐Reinforced Metal Matrix Nanocomposite Powders Production by Plasma‐Assisted Thermochemical Treatment of Intermetallic Powders

Advanced Engineering Materials, EarlyView.
This study proposes a new methodology for producing metal matrix nanocomposites in the solid state. The process involves the plasma‐assisted thermochemical treatment of metallic alloy powders. As a proof‐of‐concept, TiN nanoparticles are synthesized directly on the surface of FeTi intermetallic powder particles, enabling the development of the ...
Deivison Daros Paim, Antônio Rogério de Souza, Tatiana Bendo, Aloisio Nelmo Klein, Rodrigo Perito Cardoso   +4 more
wiley   +1 more source

Comparative Impedance Characteristic Analysis of Grid‐Following and Grid‐Forming Inverters

IET Renewable Power Generation
This paper comprehensively analyses the impedance characteristics of grid‐following (GFL) and grid‐forming (GFM) inverters at around synchronous frequency areas considering various operating and grid connection conditions and control settings.
Yonggang Zhang, Peter Unruh, Boris Fischer, Martin Braun   +3 more
doaj   +1 more source

Small-Signal Stability Analysis and Optimization of Grid-Forming Permanent-Magnet Synchronous-Generator Wind Turbines

Energies
Due to the ability to improve the low-inertia characteristics of power systems and offer reliable voltage and frequency support, grid-forming permanent-magnet synchronous-generator wind turbines (PMSG-WTs) based on virtual synchronous-generator (VSG ...
Guanghui Li, Runqi Han, Bin Liu, Zhen Li
doaj   +1 more source

Improved Dual Closed-Loop Control for Modular Multilevel Converters Based on Voltage Drop on Grid Impedance [PDF]

Dianli jianshe
[Objective] As renewable power bases gradually expand from load centers to remote areas such as deep offshore， deserts， and barren lands， using grid-forming voltage source converter-based high voltage direct current （VSC-HVDC） transmission technology is ...
LIU Shan, LIU Qi, ZHU Lin, YAN Jun, CHI Chengbin, SUN Zengjie
doaj   +1 more source

The generation of strong magnetic fields during the formation of the first stars

, 2010
Cosmological hydrodynamical simulations of primordial star formation suggest that the gas within the first star-forming halos is turbulent. This has strong implications on the subsequent evolution, in particular on the generation of magnetic fields ...
Balsara, Beck, Biermann, Bonnor, Bromm, Ebert, Fromang, Fryxell, Krumholz, Krumholz, Machida, Maki, Medvedev, Murphy, O'Shea, Omukai, Peters, Peters, Robishaw, Schekochihin, Schleicher, Schlickeiser, Tan, Waagan, Wise, Xu, Xu   +26 more
core   +1 more source