Results 31 to 40 of about 58,866 (304)
STAR-RIS-UAV-Aided Coordinated Multipoint Cellular System for Multi-User Networks
Drones, 2023 Different from conventional reconfigurable intelligent surfaces (RIS), simultaneous transmitting and reflecting RIS (STAR-RIS) can reflect and transmit signals to the receiver. In this paper, to serve more ground users and increase deployment flexibility,
Baihua Shi +8 more
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User Selection for Simple Passive Beamforming in Multi-RIS-Aided Multi-User Communications
, 2023 This paper focuses on multi-user downlink signal transmission in a wireless system aided by multiple reconfigurable intelligent surfaces (RISs). In such a multi-RIS, multi-user, multi-antenna scenario, determining a set of RIS phase shifts to maximize ...
Wei Jiang, Wei Jiang (8679951)
core +1 more source
Drones, 2023 Unmanned aerial vehicles (UAVs) and reconfigurable intelligent surfaces (RIS) are the promising emerging technologies proposed for the 6th-Generation (6G) network to improve the capacity, reliability, and coverage of wireless communications.
Chi Yen Goh +2 more
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Micromachines, 2023 Risedronate sodium (RIS) exhibits limited bioavailability and undesirable gastrointestinal effects when administered orally, necessitating the development of an alternative formulation. In this study, mPEG-coated nanoparticles loaded with RIS-HA-TCS were
Zoya Saifi +7 more
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Reconfigurable Intelligent Surfaces: possible applications and benefits [PDF]
, 2022 openNegli ultimi anni le Superfici Intelligenti e Riconfigurabili (RIS) sono stati al centro di molti studi per motivi legati al loro possibile utilizzo e i diversi benefici che questo comporta per le reti wireless. Questa tecnologia è considerata una
KOSIAKOV, ARINA
core
Enhancing Asia’s trade: price and non-price barriers revisited [PDF]
Journal of International Logistics and Trade, 2010 In a supply-constrained region like Asia, promoting exports has always been a challenge particularly at a time when Asia’s trade has been severely affected by lack of external demand.
Prabir De
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Energy Efficiency Fairness of Active Reconfigurable Intelligent Surfaces-Aided Cell-Free Network
IEEE Access, 2023 Reconfigurable intelligent surface (RIS) has been widely recognized as a promising technique for future wireless communications. Benefiting from its ability to improve channel capacity with low cost and power consumption, the concept of RIS-aided cell ...
Yuhong Wang, Jingyi Peng
doaj +1 more source
Passive RIS vs. Hybrid RIS: A Comparative Study on Channel Estimation [PDF]
, 2021 The reconfigurable intelligent surface (RIS) plays an important role in maintaining the connectivity in millimeter wave (mmWave) MIMO systems when the direct channel between the transceivers is blocked.
Jiguang He +5 more
core +1 more source
Beamforming Dual-loop Optimization Algorithm for RIS-assisted UAV Communication Systems [PDF]
Zhengzhou Daxue xuebao. Gongxue banIn order to enhance the spectrum efficiency of the RIS-UAV relay communication system formed by integrating UAV and RIS in complex urban environments, research was conducted to explore the optimization of maximizing system downlink sum rate of RIS-UAV ...
GUO Xinying, LIU Longfei, ZHU Chunhua
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A sleep-active neuron can promote survival while sleep behavior is disturbed.
PLoS Genetics, 2023 Sleep is controlled by neurons that induce behavioral quiescence and physiological restoration. It is not known, however, how sleep neurons link sleep behavior and survival.
Inka Busack, Henrik Bringmann
doaj +1 more source