Results 121 to 130 of about 9,663 (287)

Wideband RCS Reduction and Gain Enhancement for a Patch Antenna with Broadband AMC Structure [PDF]

Radioengineering, 2019
In this paper, a simultaneous improvement of radiating and scattering performance for a patch antenna is realized. For achieving the wideband low-scattering property, a broadband AMC structure with orthogonally slot-embedding is proposed and analyzed ...
Y. Ge, Y. J. Zhao, J. Q. Chen
doaj  

Ultra Wideband Low‐RCS Linear Polarised Array Based on Composite Metasurface

IET Microwaves, Antennas & Propagation
This paper proposed the design of an ultra‐wideband antenna array with low radar cross section (RCS) based on a composite metasurface. In the high‐frequency region, an ultra‐wideband polarisation conversion metasurface (PCM) unit is designed.
Yanni Wang, Chenjiang Guo, Xia Ma, Jun Ding, Xiaoyan Pang   +4 more
doaj   +1 more source

Radar Cross Section Reduction Techniques using Metamaterials

International Journal of Innovative Technology and Exploring Engineering, 2019
In this paper, we have discussed and summarized the techniques of radar cross section reduction (RCSR). RCSR has been prompted due to the evolution of military technology. The paper reviews the basic concepts and characteristics of metamaterials, as these are the most favorable development that impacts defense industry products and stealth technology ...
openaire   +1 more source

Engineered Exosomal miR‐146a‐5p Reprograms BMSC Fate and Restores Mitochondrial Homeostasis in Glucocorticoid‐Induced Osteonecrosis of Femoral Head

Advanced Science, EarlyView.
Exosomal miR‐146a‐5p is identified as a pivotal regulator in steroid‐induced osteonecrosis. Its reduction activates NF‐κB signaling, compromises mitophagy, and disrupts mitochondrial bioenergetics, resulting in autophagic disequilibrium. Engineered exosomes delivering miR‐146a‐5p reinstate mitochondrial function, augment oxidative phosphorylation and ...
Zehui Lv, Xuejie Cai, Yiming Xu, Xingdong Yang, Ruoying Wang, Han Wang, Yixin Bian, Jiawei Xu, Jiao Lu, Lulu Liu, Yingjie Wang, Jibin Song, Bin Feng, Xisheng Weng   +13 more
wiley   +1 more source

Jacobi-Davidson iteration based reduced order finite element models for radar cross-section

, 2013
Finite element modeling of large-scale scattering problems like radar cross-section (RCS) lead to large matrices. Model order reduction (MOR) using eigenspace projection of these models involving plane wave excitation requires solution of nonlinear ...
K.J. Vinoy, Neeraj, Kumar, Gopalakrishnan, S, Vinoy, KJ, Neeraj Kumar, S. Gopalakrishnan   +5 more
core   +1 more source

Ultra Wideband Radar Cross Section Reduction by using non-Resonant Unit Cells. [PDF]

Sci Rep, 2020
Nadi M, Sedighy SH, Khalaj-Amirhosseini M.   +2 more
europepmc   +1 more source

Closed‐Loop Radiative Cooling Mulch Upcycled From Agricultural Residues for Efficient Soil Heat–Water Stress Mitigation

Advanced Science, EarlyView.
Conventional passive radiative cooling films rely on costly feedstocks and energy‐intensive fabrication, with poor end‐of‐life compatibility in agriculture. To address this challenge, a sustainable radiative cooling mulch (SRCM) is developed from waste maize leaves via spontaneous hydrogen‐bond self‐assembly.
Hao Li, Dong Lv, Yang Fu, Cancheng Jiang, Wenqi Wang, Ze Li, Lin Liang, Jiayu Du, Jie Tan, Yihao Zhu, Wenjie Liu, Lamfeddal Kouisni, Kaixin Lin, Chi Yan Tso   +13 more
wiley   +1 more source

A HYBRID STRUCTURE OF FREQUENCY SELECTIVE SURFACE AND MAGNETIC ABSORBING SALISBURY SCREEN FOR WIDEBAND RADAR CROSS SECTION REDUCTION

, 2023
This article presents a novel hybrid physical mechanism that combines frequency selective surface (FSS) and Salisbury-type absorption to create a structure that can reduce the radar cross section (RCS) over a wide frequency range.
Doan, Tung Anh, Tran, Quang Dat, Nguyen, Tran Ha   +2 more
core  

Large Language Model‐Informed Dual‐Track AI Framework for the Synergistic Design of Crack‐Free and High‐Strength Superalloys

Advanced Science, EarlyView.
This paper illustrates a knowledge‐augmented dual‐track AI framework for advanced superalloy design. First, Large Language Models translate metallurgical heuristics into explicit rules to rapidly prune a vast compositional search space. Subsequently, LLM‐distilled priors safely guide a reinforcement learning agent during autonomous process optimization,
Jian Yao, Junkang Wu, Jie Su, Fuzhu Wang, Zi Wang, Li Wang, Liming Tan, Lan Huang, Feng Liu, Yong Liu   +9 more
wiley   +1 more source

Study of Frequency Selective Surfaces on Radar Cross Section Reduction

, 2009
With recent technology in radar cross section reduction (RCSR), a periodic array of frequency selective surfaces (FSSs) which exploits a non-metallic ground plane and slot embedded in the patch elements have been presented.
Ismail, M.Y., Shamsani, N. A. N. M.
core