Results 111 to 120 of about 83,839 (349)

High frequency polarization switching of a thin ferroelectric film

, 2010
We consider both experimentally and analytically the transient oscillatory process that arises when a rapid change in voltage is applied to a $Ba_xSr_{1-x}TiO_3$ ferroelectric thin film deposited on an $Mg0$ substrate. High frequency ($\approx 10^{8} rad/
A. F. Devonshire, A. I. Maimistov, E. D. Mishina, E. V. Kazantseva, G. A. Smolensky, J.-G. Caputo, L. D. Landau, L. Landau, O. Vendik, V. L. Ginzburg, V. L. Ginzburg, V. M. Mukhortov, Yu. I. Balkarei   +12 more
core   +1 more source

Accelerating Luminescence in Nanostructures: Exploring the Physical Limits and Impact of Ultrafast Emission in Nanoscale Materials

Advanced Photonics Research, EarlyView.
This review highlights recent advances in accelerating luminescence in nanostructures through cooperative emission, resonator coupling, and nonlocal light–matter interactions. By unifying concepts such as excitonic superradiance, superfluorescence, and the plasmonic Purcell effect, it reveals physical limits of ultrafast emission and their potential ...
Masaaki Ashida, Koichi Okamoto, Takuya Matsuda, Hajime Ishihara   +3 more
wiley   +1 more source

A Novel Reinforcement Learning Algorithm-Based Control Strategy for Grid-Configured Inverters

Energies
To address the power oscillation problem due to the introduction of inertia and damping, this paper proposes a new deep reinforcement learning algorithm based on the SD3 (Softmax Deep Double Deterministic policy gradients) algorithm for grid ...
Xuhong Yang, Jingjian Wang
doaj   +1 more source

Reinforcement learning applied to power system oscillations damping [PDF]

Proceedings of the 40th IEEE Conference on Decision and Control (Cat. No.01CH37228), 2002
This paper investigates the use of reinforcement learning in electrical power system oscillations damping. The approach consists in using temporal-difference learning algorithms to control a FACTS (Flexible Alternative Current Transmission System) so as to damp power system oscillations.
openaire   +1 more source

Photonic Cavity Synchronization of Nanomechanical Oscillators

, 2013
Synchronization in oscillatory systems is a frequent natural phenomenon and is becoming an important concept in modern physics. Nanomechanical resonators are ideal systems for studying synchronization due to their controllable oscillation properties and ...
Bagheri, Mahmood, Fan, Linran, Marquardt, Florian, Poot, Menno, Tang, Hong X.   +4 more
core   +1 more source

Bound States in the Continuum in Metasurface Absorbers: A Comparison with Metasurfaces

Advanced Photonics Research, EarlyView.
Bound states in the continuum (BICs) offer a powerful mechanism for enhancing light–matter interactions. This work systematically investigates the radiation characteristics of BICs under both transmission and reflection configurations using multipolar analysis.
Guizhen Xu, Zhanqiang Xue, Jiang Du, Longqing Cong   +3 more
wiley   +1 more source

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

Dynamic interaction between synchronous machine and DC-power-modulated LCC in electromechanical timescale

The Journal of Engineering, 2018
Active power modulation of line-commutated converter (LCC)-based high-voltage direct current (HVDC) system is increasingly utilised, especially for the case of damping low-frequency oscillation associated with synchronous machine (SM) in ...
Jiazuo Hou, Shicong Ma, Xuan Gong, Jiabing Hu   +3 more
doaj   +1 more source

Nonlinear Control Design of Series FACTS Devices for Damping Power System Oscillation [PDF]

, 2011
Kumkratug
openalex   +1 more source

Power Oscillation Damping Controllers for Grid-Forming Power Converters in Modern Power Systems

IEEE Transactions on Power Systems
Inter-area oscillations have been extensively studied in conventional power systems dominated by synchronous machines, as well as methods to mitigate them. Several publications have addressed Power Oscillation Damping (POD) controllers in grid-following voltage source converters (GFOL).
Elia Mateu-Barriendos, Onur Alican, Javier Renedo, Carlos Collados-Rodriguez, Macarena Martin Almenta, Edgar Nuño Martinez, Oriol Gomis-Bellmunt, Eduardo Prieto-Araujo   +7 more
openaire   +3 more sources