Results 61 to 70 of about 751,808 (290)

Spatiotemporal Computational Meta‐Imager for Broadband Dual‐Layer Optical Convolution

Advanced Science, EarlyView.
A single‐layer polarization‐multiplexed meta‐imager achieves factorized dual‐layer broadband convolution via spatiotemporal kernel decomposition. Fixed Bessel‐vortex bases and time‐sequential liquid‐crystal modulation deliver tunable signed weights and in‐situ fabrication‐error compensation. Experiments verify improved classification performance across
Mengguang Wang, Chenglong Zheng, Huaping Zang, Changwei Zhang, Huai Xia, Chang Wang, Zhenrong Zheng   +6 more
wiley   +1 more source

Guidance of Unmanned Surface Vehicles: Experiments in Vehicle Following [PDF]

IEEE Robotics & Automation Magazine, 2012
Virtual target-based path-following techniques are extended to execute the task of vehicle following in the case of unmanned surface vehicles (USVs). Indeed, vehicle following is reduced to the problem of tracking a virtual target moving at a desired range from a master vessel, while separating the spatial and temporal constraints, giving priority to ...
Marco Bibuli, Massimo Caccia, Lionel Lapierre, Gabriele Bruzzone   +3 more
openaire   +2 more sources

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, Jianing Yang, Lingyun Zhang, Jingyu Bao, Bingbai Li, Qingsong Feng, Rui You, Xiaoli Jing, Fei Xing, Xiaoguang Zhao, Zheng You   +10 more
wiley   +1 more source

Unmanned Marine Vehicles

Journal of Marine Science and Engineering, 2021
Water covers nearly 70% of the Earth’s surface, and throughout history, oceans, seas, lakes, rivers, etc [...]
Gabriele Bruzzone, Roberta Ferretti, Angelo Odetti   +2 more
doaj   +1 more source

Enhancing Surface Icephobic Performance via Spontaneous Fracture Characteristics of Ice Crystals Regulated by Structural Scale Under Shear Flow Conditions

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, Yizhou Shen, Yangjiangshan Xu, Junxian Xiang, Weilan Liu, Senyun Liu, Lingfeng Zhao, Jie Tao, Zhong Chen   +8 more
wiley   +1 more source

Accelerating High‐Fidelity Airfoil Design via Physics‐Informed Video Diffusion Model

Advanced Science, EarlyView.
Physics‐informed video diffusion enables rapid inverse aerodynamic design by mapping target lift‐to‐drag response to airfoil geometries and full‐field flow distributions. Trained on 53 400 DNS samples, the model achieves over 90% fidelity with ∼30 s inference, while experimentally realized propeller designs demonstrate a practical pathway from ...
Yifeng Ai, Yijia Guo, Hongfu Zhang, Lei Zhou, Tiejun Huang, Weiqiu Chen, Xuhui He, Peng Guo, C. W. Lim, Lei Ma   +9 more
wiley   +1 more source

Space and time joint optimization for vertical takeoff and landing aircraft in dense obstacles and interference environments

Systems Science & Control Engineering
The Vertical Takeoff and Landing Aircraft (VTOL) is capable of both low-speed hovering and high-speed flight. This paper proposes an autonomous motion planning and anti-wind disturbance control algorithm for the VTOL, implemented spatial and temporal ...
Liben Yang, Yu Li, Jianwen Tian, Dong Wang   +3 more
doaj   +1 more source

Cooperative conflict detection and resolution of civil unmanned aerial vehicles in metropolis

Advances in Mechanical Engineering, 2016
Unmanned air vehicles have recently attracted attention of many researchers because of their potential civil applications. A systematic integration of unmanned air vehicles in non-segregated airspace is required that allows safe operation of unmanned air
Jian Yang, Dong Yin, Yifeng Niu, Lei Zhu
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, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Indoor illumination estimation based on improved black winged kite optimized transformer

Discover Artificial Intelligence
In order to improve the accuracy and adaptability of indoor illuminance estimation in intelligent lighting systems, this paper proposes a CBKA-Transformer model based on an improved Black-Winged Kite Optimization Algorithm.
Lirong Cheng
doaj   +1 more source