Results 31 to 40 of about 2,725 (185)

Phase‐difference measurement‐based angle of arrival estimation using long‐baseline interferometer

IET Radar, Sonar & Navigation, 2023
This article presents a direction‐finding method based on phase difference measurement for wide‐ranging applications of electronic intelligence. By including three processing steps of rotating, re‐scaling, and rounding of phase plane, the proposed method
Van‐Sang Doan, Thien Huynh‐The, Van‐Phuc Hoang, Jiri Vesely   +3 more
doaj   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Genetic variability antioxidant activity of blood plasma in urban population (Seversk) of Tomsk region

Бюллетень сибирской медицины, 2002
Antioxidant activity (AOA) was measured in 185 inhabitants of the town of Seversk (members of 43 families and unrelated individuals). AOA was defined on the ability of a blood plasma to reduce an output of products, reacting with thiobarbituric acid in ...
A. V. Marusin, V. P. Puzyryov, V. B. Salyukov, E. Yu. Bragina   +3 more
doaj   +1 more source

Effects of Camber of S‐Series Airfoils on Aerodynamic Performance, Entropy Generation Rate, Irreversibility, and Second Law Efficiency of Horizontal Axis Wind Turbines

Energy Science &Engineering, EarlyView.
Due to the depletion of fossil fuels, enhancing wind turbine efficiency is crucial. Utilizing airfoils with high lift‐to‐drag ratios significantly improves power generation by optimizing aerodynamic parameters. Furthermore, entropy generation analysis serves as an effective method for design optimization by minimizing energy losses and exergy ...
Mitra Yadegari
wiley   +1 more source

Sinningia pampeana sp. nov. (Gesneriaceae) from the Pampa's rocky outcrops in southern Brazil and Uruguay

Nordic Journal of Botany, EarlyView.
Sinningia pampeana is a new rupicolous species from the rocky outcrops of the Pampa biome in southern Brazil and Uruguay. Morphological analyses based on herbarium material, field observations, and detailed illustrations support its recognition as a distinct species from Sinningia sellovii.
Gabriel Emiliano Ferreira, Daniel Alves Spiazzi, Pedro Henrique Sonsim Barbieri, Alain Chautems, Andréa Onofre Araújo   +4 more
wiley   +1 more source

APTNet: A Condition‐Sensitive Modulation Framework for Surface Pressure Prediction on Supersonic Aircraft

CAAI Transactions on Intelligence Technology, EarlyView.
ABSTRACT Accurate surface‐pressure prediction over broad operating envelopes is critical for supersonic aerodynamic analysis and design. To overcome the bottlenecks of traditional computational fluid dynamics (CFD) in real‐time performance and computational efficiency, data‐driven deep learning methods have emerged. However, existing data‐driven models
Hongbin Xu, Yin Long, Junlin Wu
wiley   +1 more source

Testing and Analysis of LoRa Signal Arrival Angle Based on One-Line Array

International Journal of Antennas and Propagation
In complex indoor environments, localization methods based on the angle of arrival (AoA) of wireless signals have better stability. Implementing LoRa signal AoA estimation mainly contains two challenges: firstly, in LoRa devices for teaching, the chip ...
Xun Yi, Zhili Zhao, Haixin Zou, Mingxiang Guan   +3 more
doaj   +1 more source

Controlling AoA Estimation Errors in Rician Fading via Measurement Quality Classification

IEEE Access
Angle of Arrival (AoA) estimation plays a crucial role in modern positioning systems but is often affected by errors in multipath channels. Existing methods typically lack a direct mechanism to assess the quality of the estimates, while full channel ...
Pedro Lemos, Glauber Brante, Ohara Kerusauskas Rayel, Richard Demo Souza   +3 more
doaj   +1 more source

Power Scalable Angle of Arrival Estimation Using Pilot Design With Orthogonal Subsequences

IEEE Open Journal of the Communications Society, 2021
Energy efficient array processing is critical to implement feasible solutions for directional communication in a mmWave channel. MmWave channels are highly susceptible to blockage and require frequent angle of arrival (AoA) estimation.
Mahbuba S. Ullah, Ahmed Tewfik, Robert W. Heath   +2 more
doaj   +1 more source

Holding a Mirror to Ourselves: Remediation Policy in Surgical Training in Australia and Aotearoa New Zealand

ANZ Journal of Surgery, EarlyView.
ABSTRACT Introduction Remediation is a critical component of surgical training, designed to support trainees who are not progressing as expected and to ensure they reach the standards required. Despite its importance, remediation practices remain poorly understood. A clearer understanding of current remediation practices is essential if training bodies
Kathryn McLeod, Robyn Woodward‐Kron, Prem Rashid, Debra Nestel   +3 more
wiley   +1 more source