Results 41 to 50 of about 882 (196)

Channel Measurements and Characterizations for Long Range Air-to-Ground Communication Systems in the UHF Band

IEEE Access, 2022
In this paper, we consider long range air-to-ground (AG) communication systems which support aeronautical platforms including unmanned aerial vehicles (UAVs) in the ultra high frequency (UHF) band. For such a system, we present the measurement based path
Jaesin Kim, Inkyu Lee
doaj   +1 more source

Robust Reinforcement Learning Control Framework for a Quadrotor Unmanned Aerial Vehicle Using Critic Neural Network

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Quadrotor unmanned aerial vehicle control is critical to maintain flight safety and efficiency, especially when facing external disturbances and model uncertainties. This article presents a robust reinforcement learning control scheme to deal with these challenges.
Yu Cai, Yefeng Yang, Tao Huang, Boyang Li   +3 more
wiley   +1 more source

Design and Optimization of Aircraft Configuration for Minimum Drag

International Journal of Aviation, Aeronautics, and Aerospace, 2018
This paper presents a reliable and robust optimization for minimum drag of an aircraft at the conceptual design phase. Firstly, the conceptual design code was developed and existing Single Seat Aerobatic (SSA) aircraft was chosen to validate the ...
Zin Win Thu, Aung Myo Thu, Phyo Wai Thaw
doaj   +1 more source

Tracking Climate and Environmental Attention: A News‐Based Composite Index

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT This study introduces the Climate and Environmental Attention Index, a composite indicator that tracks media attention to climate and environmental issues. Based on the Semantic Brand Score, the proposed index extracts significant signals from unstructured text, going beyond traditional measures of word frequency and sentiment.
Gianna Figà‐Talamanca, Andrea Fronzetti Colladon, Barbara Guardabascio, Ludovica Segneri   +3 more
wiley   +1 more source

Performance Analysis of Multiple UAV-Based Hybrid Free-Space Optical/Radio Frequency Aeronautical Communication System in Mobile Scenarios

Drones
Free-space optical (FSO) communication with unmanned aerial vehicles (UAVs) as relays is a promising technology for future aeronautical communication systems.
Xiwen Zhang, Shanghong Zhao, Yuan Wang, Hang Hu, Guangmingzi Yang, Xinkang Song, Xin Li, Jianjia Li   +7 more
doaj   +1 more source

Bidirectional Wireless Power Transfer for Electric Vehicle Energy Systems Integrating Modelling, Intelligent Control, Communication and Cybersecurity: A Review

Energy Science &Engineering, EarlyView.
This graphical abstract illustrates the evolution of wireless electric vehicle charging from unidirectional wireless power transfer to bidirectional wireless power transfer (BWPT) and toward future intelligent, autonomous wireless energy systems.
P. V. Elumalai, Yuvaraja Shanmugam, A. Vivek Anand, Mesith Chaimanee, Choon Kit Chan, S. Prabhakar, R. Narayanamoorthi   +6 more
wiley   +1 more source

Interface Engineering of Boron Nitride–Polymer Composites for High Thermal Conductivity

Information &Functional Materials, EarlyView.
This review comprehensively discusses the impacts of interfacial design and fabrication strategies on boron nitride–polymer composites, and systematically classifies and summarizes recent advances in interfacial engineering based on the interaction modes between boron nitride fillers and polymer matrices.
Zhao Chen, Yuhang Meng, Chenyu Zhao, Xiangfen Jiang, Xuebin Wang   +4 more
wiley   +1 more source

Artificial intelligence–driven decoupling structure–activity relationship for lithium‐ion batteries

InfoScience, EarlyView.
Artificial intelligence can efferently accelerate the high‐throughput screening of battery materials, the analysis of multiphase mechanisms, and the precise prediction of capacity and cycle life. This review systematically summarizes the applications of machine learning (ML) in decoupling the complex structure‐activity relationships of lithium‐ion ...
Tao Wang, Yuhang Meng, Tianhao Chen, Xiangfen Jiang, Yoshio Bando, Jinjue Zeng, Xuebin Wang   +6 more
wiley   +1 more source

A thrust equation treats propellers and rotors as aerodynamic cycles and calculates their thrust without resorting to the blade element method

International Journal of Aviation, Aeronautics, and Aerospace, 2019
The lift generated by a translating wing of known translational speed, lift coefficient and area is calculated by a simple equation. A propeller or rotor generating thrust share the same aerodynamic principles but their different kinematics cause the ...
Phillip - Burgers
doaj   +1 more source

The Value of Identifying and Recovering Lost GN&C Lessons Learned: Aeronautical, Spacecraft, and Launch Vehicle Examples [PDF]

AIAA Guidance, Navigation, and Control Conference, 2010
Within the broad aerospace community the importance of identifying, documenting and widely sharing lessons learned during system development, flight test, operational or research programs/projects is broadly acknowledged. Documenting and sharing lessons learned helps managers and engineers to minimize project risk and improve performance of their ...
Cornelius Dennehy, Steve Labbe, Kenneth Lebsock   +2 more
openaire   +1 more source