Results 91 to 100 of about 843,694 (188)

PS-MADDPG-BGMPOA: Co-Channel Interference Avoidance for LEO Beam-Hopping Satellite Systems via Multi-Parameter Optimization of Beam Geometry

AI
In Low Earth Orbit Beam-Hopping Satellite Systems (L-BHSS), co-channel interference among beams severely degrades communication quality. To address the inter-beam co-channel interference avoidance problem, this paper proposes a Parameter-Sharing Multi ...
Yanjun Song, Jianan Hou, Lidong Zhu, Yi Zheng   +3 more
doaj   +1 more source

Joint beam hopping and coverage control optimization algorithm for multibeam satellite system

Tongxin xuebao, 2023
To improve the performance of multibeam satellite (MBS) systems, a deep reinforcement learning-based algorithm to jointly optimize the beam hopping and coverage control (BHCC) algorithm for MBS was proposed.Firstly, the resource allocation problem in MBS
Guoliang XU, Feng TAN, Yongyi RAN, Feng CHEN   +3 more
doaj  

High‐Pressure Modulation of Breathing Kagome Lattice: Cascade of Lifshitz Transitions and Evolution of the Electronic Structure

Advanced Science, EarlyView.
External pressure directly tunes the breathing distortion of the kagome lattice in Fe3Sn2, suppressing it near 15 GPa and reversing it at higher pressures. This structural modulation drives a cascade of Lifshitz transitions, reconstructs the Fermi surface, strengthens electronic correlations and carrier localization, and modifies ultrafast electron ...
Marcos Vinicius Gonçalves‐Faria, Maxim Wenzel, Yuk Tai Chan, Olga Iakutkina, Francesco Capitani, Davide Comboni, Michael Hanfland, Qi Wang, Hechang Lei, Martin Dressel, Alexander A. Tsirlin, Alexej Pashkin, Stephan Winnerl, Manfred Helm, Ece Uykur   +14 more
wiley   +1 more source

A dynamic beam switching metasurface based on angular mode-hopping effect

Frontiers in Physics
Fast and versatile beam forming and steering technologies are now crucial for various emerging applications, including wireless optical communications and optical switches.
Dongyu Hu, Shaowei He, Shibin Li, Weiming Zhu   +3 more
doaj   +1 more source

Low Temperature Electrical Resistivity Studies in Lead Thin Films [PDF]

Журнал нано- та електронної фізики, 2013
Thin lead films of thickness, 100 nm, 150 nm, 200 nm and 250 nm have been deposited using electron beam evaporation technique at room temperature onto glass substrates under high vacuum conditions.
A.W. Manjunath, T. Sankarappa, R. Ramanna, J.S. Ashwajeet, T. Sujatha, P. Sarvanan   +5 more
doaj  

Minimal Transport Units Govern Oxygen‐Defect Stabilization and Transport for Lightweight Solid Electrolytes

Advanced Science, EarlyView.
Lightweight borate chemistry combined with minimal transport units provides a new pathway for designing lightweight oxide‐ion solid electrolytes. ABSTRACT Solid electrolytes are central to electrochemical energy technologies, including fuel cells, sensors, catalysis, membrane separation, and electrolyser.
Xiaohui Li, Yongkang Zheng, Li Yang, Xiaoge Wang, Yuan Gou, Guanqun Cai, Jie Liu, Cheng Li, Kun Lin, Qiang Li, Mingxue Tang, Junliang Sun, Xianran Xing, Xiaojun Kuang   +13 more
wiley   +1 more source

Effectiveness of Reference Height Control system for Tripod Hopping Robot [PDF]

, 2011
In this paper, the generation of vertical jumping motion for tripod hopping robot through reference height control system method in order to converge the differences of reference height for each leg of tripod hopping robot is discussed.
Nurul Hafizah, Abd Rahim, Mohammad Fahmi , Miskon, Anuar , Mohamed Kassim, Takashi , Yasuno   +3 more
core   +1 more source

Beam-Hopping-Based Resource Allocation in Integrated Satellite-Terrestrial Networks

Sensors
The integrated satellite-terrestrial network (ISTN) provides a promising solution to achieve high-data-rate and ubiquitous connectivity in next-generation communication networks.
Mengying Zhang, Xiumei Yang, Zhiyong Bu
doaj   +1 more source

A Dispersant‐Driven Carbon‐Binder Domains Homogeneity in High‐Energy‐Density Electrodes for Lithium‐Ion Batteries

Advanced Science, EarlyView.
A polar dispersant, aromatic‐functionalized polyacrylate (AFPA), enables the formation of a uniform CBD network by enhancing miscibility with PVDF and suppressing phase separation. This leads to α‐phase crystallization of PVDF and aligned CNT networks within the CBD, resulting in well‐connected structures that improve cohesion, electron/ion transport ...
Da‐Sol Kwon, Min Young Seo, Jinho Ahn, Yea‐Ji Jeong, Woohyeon Shin, Wonseok Ko, Min Jeong Kim, Jiny Lee, Won‐Yong Jeon, Min‐Jae Choi, Kwang In Kim, Jin Ju Eom, Sang Yeop Oh, Honghee Lee, Joona Bang, Jongsoon Kim, YongJoo Kim, Jung‐Keun Yoo   +17 more
wiley   +1 more source

Structural Changes and Transport Properties of YBa2Cu3O7 Locally Modified by a He+ Focused Ion Beam

Advanced Science, EarlyView.
The structure and the electric transport properties of YBa2Cu3O7 modified with 30 keV He+${\rm He}^{+}$ ions depend on the irradiation dose and lateral size of the irradiated area, as shown by low‐temperature resistivity measurements, diffraction with a nanofocused X‐ray beam and atomic force microscopy.
Ross Carter, Robin Hutt, Paul Zimmermann, Ainur Abukaev, Jan Ullmann, Simon Koch, Christoph Schmid, Manfred Burghammer, Reinhold Kleiner, Dieter Koelle, Edward Goldobin, Ivan A. Zaluzhnyy   +11 more
wiley   +1 more source