Results 111 to 120 of about 332,498 (295)

Analysis of reconfigurable intelligent surface assisted networking

Dianxin kexue
Network assisted with reconfigurable intelligent surface is a kind of low-cost and low-power solution which can provide stable, continuous and ubiquitous connection to satisfy deep coverage requirements in 5G-Advanced (5G-A) and 6G era.
LIU Qiuyan, LI Bei, CAO Yanxia, YAO Saibin, JIANG Zhenwei, MO Xiaohao, WANG Yafeng   +6 more
doaj   +2 more sources

Performance analysis for reconfigurable intelligent surface assisted downlink NOMA networks

IET Communications, 2022
In this paper, a reconfigurable intelligent surface (RIS) assisted downlink non‐orthogonal multiple access (NOMA) network is considered, where a base station communicates with a pair of users with the assistance of a RIS.
Xianli Gong, Chongwen Huang, Xinwei Yue, Feng Liu, Zhaohui Yang   +4 more
doaj   +1 more source

Beyond 3D: Smart Material Systems for Microscale 4D Printing

Advanced Materials Technologies, EarlyView.
Smart materials exhibit shape changes in response to their environment, enabling scientists to go beyond 3D in the rapidly growing field of 4D printing. This review covers recent advances, current challenges, and emerging trends in 4D printing on the microscale.
Daniel Maher, Marcin Piekarczyk, Babak Rezaei, Ada‐Ioana Bunea   +3 more
wiley   +1 more source

Joint Beamforming and Phase Optimization in a Multi-user Communication System Composed of Dual Reconfigurable Intelligent Surfaces [PDF]

arXiv, 2021
Reconfigurable Intelligent Surface (RIS) has becoming a useful tool in future wireless communication systems for close-distance communication network. This paper we use Reconfigurable Intelligent Surface (RIS) for downlink multi-user communication designed to improve energy collection performance while satisfying wireless information and Power Transfer
arxiv  

Recent Developments in Process Digitalisation for Advanced Nanomaterial Syntheses

Chemistry–Methods, Volume 2, Issue 12, December 2022., 2022
The combination of flow, computer‐controlled equipment and inline analytics enables the digitalisation of chemical syntheses. This works highlights how these tools can be applied in the development of advanced materials. Abstract Digitalisation and industry 4.0 are set to profoundly change the way chemical and materials discovery and development work ...
Diego Iglesias, Dina Haddad, Victor Sans
wiley   +1 more source

Simultaneous Perfect Anomalous Reflection and Angle of Arrival Sensing in Reconfigurable Intelligent Surfaces

Advanced Optical Materials, EarlyView.
A reconfigurable intelligent surface is proposed that can simultaneously anomalously reflect the light and sense the angle of arrival. An in situ optimization of either the currents flowing on array elements or the far field in the receiver direction realizes anomalous reflection and suppresses parasitic scattering.
Mostafa Movahediqomi, Yongming Li, Grigorii Ptitcyn, Viktar Asadchy, Sergei Tretyakov   +4 more
wiley   +1 more source

Indoor Propagation Measurements with a Reconfigurable Intelligent Surface at 3.5 GHz [PDF]

This paper describes an investigation of the practical impact of a reconfigurable intelligent surface on indoor radio propagation. The evaluation is based on measurements of the instantaneous channel impulse response (CIR) between a static transmitter ...
Franek, Ondrej, Nielsen, Jesper Ødum, Ying, Zhinong   +2 more
core   +1 more source

Programmable Wide‐Spectrum Complex Microcavity Laser Controlled by Liquid Crystal Elastomer Braking Mechanism

Advanced Photonics Research, EarlyView.
A nematic liquid crystal elastomer (LCE) exhibiting dynamic laser oscillation behavior modulated by mechanical stretching and contraction is synthesized. This study investigates the influence of liquid crystal elastomer deformation characteristics on multidimensional complex microcavity laser systems.
Hongyang Zhu, Bingquan Zhao, Zhen He, Junxin Wei, Chensha Li   +4 more
wiley   +1 more source

Optical Wireless Communications with Metasurfaces: Current Status and Potential for Intelligent Communications

Advanced Photonics Research, EarlyView.
Optical wireless communications (OWCs) provide a promising alternative to spectrum‐congested microwave wireless communications. Recently, the use of metasurfaces with sub‐wavelength features for dynamic beam steering, beam manipulation, and spatial or optical‐angular‐momentum mode generation, conversion, and multiplexing in OWCs is proposed and ...
Ke Wang, Chengwei Fang, Md Osman Ali, Xiaojun Chen, Safa Alghadi, Shuo Li, Jiayuan He, Sithamparanathan Kandeepan   +7 more
wiley   +1 more source

Zero‐Power, Optical Toxic Gas and Vapor Sensors Utilizing Printed Nematic Liquid Crystal Patterns on Selectively Reactive Substrates

Advanced Sensor Research, EarlyView.
Fast response, zero‐power, text or image sensors utilizing light transmission or reflection, and no unfavorable color change judgments, are fabricated using printed nematic liquid crystals patterned on reactive alignment layers, permit ppt‐ to ppb‐level sensitivity, and were field‐tested with active firefighters.
Ryan A. Williams, Grace A. R. Rohaley, Ashwathanarayana Gowda, Gisele Pegorin, Andrea Oprandi, Denis Motovilov, Anthony Schneider, Elda Hegmann, Marianne E. Prévôt, Torsten Hegmann   +9 more
wiley   +1 more source