Results 31 to 40 of about 1,488,241 (284)
Adaptive Active Illumination Via Translationally and Axially Tunable Cascaded Metasurfaces
Advanced Science, EarlyView.Active three‐dimensional sensing faces a fundamental trade‐off between seeing farther and covering more of the scene. Translationally and axially tunable cascaded metasurfaces overcome this limitation by continuously adapting beam direction and illumination coverage.
Chi Zhang +10 more
wiley +1 more source
Advanced Science, EarlyView.Aerodynamic shear induces spontaneous ice fracture and detachment on hydrophobic surfaces, governed by the interplay between initial ice‐crystal size, growth orientation, and interfacial adhesion. Unexpectedly, microstructural anchoring on superhydrophobic surfaces suppresses ice shedding.
Jiawei Jiang +8 more
wiley +1 more source
UAV collision avoidance: a specific acceleration matching approach [PDF]
, 2011 Includes abstract.Includes bibliographical references.An increased level of autonomy is required for future Unmanned Aerial Vehicle (UAV) missions. One of the technologies required for this to occur is an adequate sense and avoid system to enable the UAV
Patel, Amir
core +1 more source
UAV Path Planning in Threat Environment: A*-APF Algorithm for Spatio-Temporal Grid Optimization
DronesTo address low threat avoidance efficiency and poor global path adaptability in UAV path planning under threatening environments, this paper proposes a hybrid A*-Artificial Potential Field (APF) path planning method based on spatio-temporal grid ...
Longhao Liu +6 more
doaj +1 more source
Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective
Advanced Electronic Materials, EarlyView.Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe +4 more
wiley +1 more source
AerospaceThe precise selection of key flight parameters is fundamental to enhancing aircraft condition monitoring and risk warning capabilities. However, existing methods typically rely on a single source of information, i.e., either solely expert judgments or ...
Shengkai Yan +5 more
doaj +1 more source
Analysis on Flight Dynamics Characteristic for ELA-07 Autogyro
Hangkong gongcheng jinzhan, 2018 Compared with similar helicopters, the autogyro has its unique advantages and has been widely applied in the civilian field. In order to provide theoretical reference for unmanned flight control of autogyro, the features, advantages and exiting problems ...
Ma Cunwang +3 more
doaj +1 more source
Single Image Super-Resolution Method Based on an Improved Adversarial Generation Network
Applied Sciences, 2022 Super-Resolution (SR) techniques for image restoration have recently been gaining attention due to their excellent performance. For powerful learning abilities, Generative Adversarial Networks (GANs) have been proven to have achieved great success.
Qiang Wang +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 +9 more
wiley +1 more source