Results 81 to 90 of about 26,543 (264)

Optimization of the railway vehicle bogie in term of dynamics [PDF]

Applied and Computational Mechanics, 2009
The paper deals with parameter optimization method of a railway vehicle bogie. Wheelsets are subjected to stochastic excitation caused by irregularities of the track geometry and/or caused by deterministic excitation from polygonalized running surface of
Zeman V., Hlaváč Z.
doaj  

Geometry-Based Stochastic Modeling for MIMO Channel in High-Speed Mobile Scenario

International Journal of Antennas and Propagation, 2012
The geometry-based stochastic channel models are proposed in this paper for the terrain cutting, suburb, and urban scenarios in high-speed railway. First, the special scenarios in high-speed railway are described.
Binghao Chen, Zhangdui Zhong
doaj   +1 more source

Resonant Domain Wall Dynamics in a Three‐Dimensional Magnetic Nano Double Helix

Advanced Materials, EarlyView.
3D magnetic nanostructures promise exciting possibilities for magnetization dynamics. However, experimental realizations remain scarce. In nanoprinted cobalt double helices, time‐resolved X‐ray microscopy reveals harmonic domain wall dynamics. Simulations identify the mode and additional higher‐frequency resonances, revealing a rich dynamic landscape ...
Pamela Morales‐Fernández, Iason Konstantinos‐Douveas, Claas Abert, Elina Zhakina, Sandra Ruiz‐Gómez, Claudia Fernández‐González, Luke Alexander Turnbull, Sebastian Wintz, Markus König, Simone Finizio, Markus Weigand, Naëmi Leo, Dieter Suess, Aurelio Hierro‐Rodríguez, Amalio Fernández‐Pacheco, Claire Donnelly   +15 more
wiley   +1 more source

Electron‐Induced Molecular Programming Drives Interfacial Chemistry for Ah‐Level Zinc Batteries

Advanced Materials, EarlyView.
We establish an electron‐driven molecular programming strategy that converts spontaneous solid electrolyte interphase formation into a bonding‐defined interfacial architecture. Coordinative integration of p‐bromoaniline with ZnF2 forms a dipole‐regulated molecular lock that reconfigures interfacial electrostatics, suppresses parasitic water reactions ...
Feifei Wang, Yuhang Zhuang, Jiwei Shi, Haojie Zhang, Peng Zhang, Songshan Bi, Hyejung Yang, Wenqiang Yang, Stuart S. P. Parkin, Chunpeng Yang, Quan‐Hong Yang, Ali Shaygan Nia, Xinliang Feng   +12 more
wiley   +1 more source

Laser‐Synthesized Amorphous PdSe2‐x Nanoparticles: A Defect‐Rich Platform for High‐Efficiency SERS, Photocatalysis, and Photothermal Conversion

Advanced Materials Interfaces, EarlyView.
Using femtosecond ablation, we show that an ordered, stoichiometric crystalline PdSe2 target can be controllably converted into a stable, disordered, non‐stoichiometric, and highly functional amorphous nanomaterial, PdSe2−x${\rm PdSe}_{2-x}$. The obtained nanoparticles offer significant advantages over conventional planar plasmon‐free substrates due to
Andrei Ushkov, Nadezhda Belozerova, Dmitriy Dyubo, Ilya Martynov, Alexander Syuy, Daniil Tselikov, Georgy Ermolaev, Sergey V. Bazhenov, Roman I. Romanov, Ivan Kruglov, Anton A. Popov, Alexander Chernov, Alexey D. Bolshakov, Sergey Novikov, Andrey A. Vyshnevyy, Aleksey Arsenin, Andrei V. Kabashin, Gleb I. Tselikov, Valentyn Volkov   +18 more
wiley   +1 more source

Ultrafast Photocatalytic Wettability Switching in Substrate‐Interface Tailored Titanium Dioxide Thin Films

Advanced Materials Interfaces, EarlyView.
This study demonstrates ultrafast photocatalytic wettability switching in TiO2 thin films by tailoring substrate doping and interface oxides. Enhanced switching rates and hemiwicking effects are achieved through optimized material stacks and nanostructuring.
Rucha A. Deshpande, Jesper Navne, David C. B. Nielsen, Mathias Adelmark, Radu Malureanu, Ole Hansen, Rafael Taboryski   +6 more
wiley   +1 more source

Evaluation Methodology for 6G Sensing-Assisted Communication System Performance

IEEE Access
Nowadays, Integrated Sensing and Communication (ISAC) is receiving significant attention in the frame of the Sixth Generation (6G). To assess the performance of future candidate ISAC technologies and to be able to compare them with each other, the ...
Andrea Ramos, Arturo Mrozowski, Danaisy Prado-Alvarez, Jose F. Monserrat, Yunhao Zhang, Ziming Yu, Yan Chen   +6 more
doaj   +1 more source

Selected topics in stochastic geometry

, 2021
Die vorliegende Arbeit beschäftigt sich mit drei verschiedenen Modellen aus dem Gebiet der stochastischen Geometrie. Im ersten Teil der Arbeit wird der Punktprozess der Schnittpunkte eines Poissonschen Hyperebenenprozess betrachtet. Konvergenzraten dieses Prozess gegen einen Poisson Punktprozess, sowie die schwache Konvergenz der konvexen Hülle dieser ...
openaire   +2 more sources

From Copper Nanoparticles to Alumina Encapsulated Porous Layers With Enhanced Mechanical Stability

Advanced Materials Interfaces, EarlyView.
This study analyzes the synthesis‐structure relation of individual Cu nanoparticles and highly porous nanoparticle‐based Cu films using different sputtering‐based nanoparticle sources. The inherent mechanical instability of the films is tackled with Al2O3 encapsulation through atomic layer deposition, enabling 4‐fold increase in critical force in ...
Dominik Gutnik, Daniele Casari, Laszlo Pethö, Michael Burtscher, Anna M. Hofer‐Roblyek, Christian Mitterer, Barbara Putz   +6 more
wiley   +1 more source

Advanced Design for Weakly Coupled Resonators by Automatic Active Optimization

Advanced Materials Technologies, EarlyView.
An Automatic Active Optimization (AAO) strategy integrates machine learning predictors and genetic algorithms in a closed‐loop workflow. By iteratively expanding its dataset with new discoveries, AAO overcomes the limits of conventional methods. This approach finds superior microstructural designs beyond the initial sample space. We demonstrate this on
Wei Yue, Yuan Gao, Fanping Sui, Jason Wang, Megan Teng, Peggy Tsao, Huicong Deng, Yande Peng, Liwei Lin   +8 more
wiley   +1 more source