Results 71 to 80 of about 62,896 (257)

Supporting UAV Cellular Communications through Massive MIMO

, 2018
In this article, we provide a much-needed study of UAV cellular communications, focusing on the rates achievable for the UAV downlink command and control (C&C) channel.
Björnson, Emil, Garcia-Rodriguez, Adrian, Geraci, Giovanni, Giordano, Lorenzo Galati, López-Pérez, David   +4 more
core   +1 more source

Adaptive mixing formation control of multiquadrotor unmanned aerial vehicle systems

Asian Journal of Control, EarlyView.
Abstract This paper presents a distributed adaptive mixing control (AMC) design for formation maintenance of systems of multiquadrotor UAVs (q‐UAVs) during commanded path‐tracking maneuvers. The proposed formation control scheme has a two‐level structure. The high level defines the desired trajectories for rigid and persistent formation acquisition and
Nasrettin Köksal, Barış Fidan, Ahmed Fahim Mostafa   +2 more
wiley   +1 more source

Technology of Pesticides and Fertilizers Application with Unmanned Aerial Vehicles in Digital Agriculture

Сельскохозяйственные машины и технологии, 2019
Digital agriculture predetermines the development of robotic agricultural technologies for the application of pesticides and fertilizers using unmanned aerial systems, which are based on unmanned aerial vehicles (UAVs) with a certain working load for ...
L. A. Marchenko, A. A. Artushin, I. S. Smirnov, T. V. Mochkova, A. Yu. Spiridonov, R. K. Kurbanov   +5 more
doaj   +1 more source

Deployment Strategies of Multiple Aerial BSs for User Coverage and Power Efficiency Maximization [PDF]

, 2018
Unmanned aerial vehicle (UAV) based aerial base stations (BSs) can provide rapid communication services to ground users and are thus promising for future communication systems. In this paper, we consider a scenario where no functional terrestrial BSs are
Masouros, Christos, Sun, Jingcong
core   +1 more source

Optimal Measurement Policy for Predicting UAV Network Topology

, 2017
In recent years, there has been a growing interest in using networks of Unmanned Aerial Vehicles (UAV) that collectively perform complex tasks for diverse applications.
Afghah, Fatemeh, Chakareski, Jacob, Razi, Abolfazl   +2 more
core   +1 more source

Interfacial Solvent Molecular Engineering via High‐Safety Dense Separators for High‐Rate Lithium‐Ion Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The dense PPS‐separator prevents thermal runaway by allowing electron transfer through the steel needle during penetration, while the residual electrolyte enables brief ion migration and Joule heating, causing rapid electrolyte vaporization, collapse of the ion transport network, and a sharp drop in ionic conductivity.
Haitao Zhou, Jie Gu, Haiyun Zhou, Yihong Deng, Yafei Shi, Yang Yang, Chen Wang, Hongquan Gao, Jianchun Wu, Libo Wang, Xiangdong Huo   +10 more
wiley   +1 more source

Collaborative Optimization of Electromagnetic Interference Shielding, Adaptive Multi‐Color, and Thermal Camouflage of Basalt Fibers by Temperature‐Induced Gradient Structure Control

Exploration, EarlyView.
Polychromatic BFs with exceptional EMI and thermal shielding were fabricated based on a “plasma activation‐ALD bridging‐chemical plating‐post annealing treatments” gradient functionalization strategy. As prepared, basalt fiber/fabric demonstrates outstanding EMI SE of 53.47 dB and thermal infrared camouflage effect.
Sijie Qiao, Zhicheng Shi, Annan He, Zhiyu Huang, Aixin Tong, Binhao Wang, Jun He, Jiaxin Wang, Wei Ke, Na Yao, Shichao Zhao, Yong Qin, Weilin Xu, Fengxiang Chen   +13 more
wiley   +1 more source

Special Issue on Intelligent Image Processing and Sensing for Drones

Drones
Recently, the use of drones or unmanned aerial vehicles (UAVs) for various purposes has been increasing [...]
Seokwon Yeom
doaj   +1 more source

Unmanned Aerial Vehicle (UAV) Cooperative Mission Planning [PDF]

American Journal of Engineering and Technology Management, 2017
Unmanned Aerial Vehicle (UAV) is a kind of new operational platform possessing ability to flight autonomously and perform independently a task,which can not only carry out non-attack tasks,such as military reconnaissance, surveillance and search, but also to carry out tasks to air-to-ground attacking, target bombing and so on.
openaire   +1 more source

Late summer plateau pika spatial habitat use revealed by high‐resolution wildlife tracking and unmanned aerial vehicle data on the Qinghai‐Tibet Plateau

Grassland Research, EarlyView.
Tiny “ecosystem engineers,” plateau pikas range across 1600 m², about two basketball courts, mixing soil and nutrients that sustain Tibet's fragile grasslands. Custom‐made trackers and drone imagery show dawn‐to‐dusk surface foraging and nested‐scale patch choices, offering fresh guidance for wildlife‐friendly grazing management.
Dan Li, Johannes M. H. Knops, Li Li
wiley   +1 more source