Results 51 to 60 of about 49,392 (306)

A Study on the Vulnerability of Multilayer Subway Networks Based on the SPM and DQN

Applied Sciences
To address the escalating vulnerability of metro systems under multiple perturbations—including extreme rainfall, equipment failures, and passenger surges—this study tackles several limitations in existing research: the predominant focus on single-layer ...
Chen Yang, Lei Zhang, Liang You, Wenjie Tian, Chuhan Ma, Bowu Wei   +5 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, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Correction: Liu et al. UAV Path Planning in Threat Environment: A*-APF Algorithm for Spatio-Temporal Grid Optimization. Drones 2025, 9, 661

Drones
Error in Figure/Table [...]
Longhao Liu, Le Ru, Wenfei Wang, Hailong Xi, Rui Zhu, Shiliang Li, Zhenghao Zhang   +6 more
doaj   +1 more source

Low Reynolds Number Propeller Slipstream Interference with Wing Aerodynamic Characteristics

Hangkong gongcheng jinzhan, 2018
Detailed research for wing aerodynamic characteristics of propeller slipstream at low Reynolds number could contribute the mechanism study of low speed near space flow, and provide reliable aerodynamic results.
Sun Kaijun, Bao Xiaoxiang, Fu Yiwei
doaj   +1 more source

Companion Unmanned Aerial Vehicles: A Survey

CoRR, 2020
14 pages, 3 ...
Chun Fui Liew, Takehisa Yairi
openaire   +2 more sources

On Resource Overbooking in an Unmanned Aerial Vehicle [PDF]

2012 IEEE/ACM Third International Conference on Cyber-Physical Systems, 2012
Large variations in the execution times of algorithms characterize many cyber-physical systems (CPS). For example, variations arise in the case of visual object-tracking tasks, whose execution times depend on the contents of the current field of view of the camera.
Dionisio de Niz, Lutz Wrage, Nathaniel Storer, Anthony Rowe 0001, Ragunathan Rajkumar   +4 more
openaire   +1 more source

Real-time people and vehicle detection from UAV imagery [PDF]

, 2011
A generic and robust approach for the real-time detection of people and vehicles from an Unmanned Aerial Vehicle(UAV) is an important goal within the framework of fully autonomous UAV deployment for aerial reconnaissance andsurveillance.
Anna Gaszczak, Gaszczak, A., Breckon, Toby P., Han, Jiwan, Han, J., Breckon, T.P., Jiwan Han, Gaszczak, Anna, Toby P. Breckon   +8 more
core   +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

A Three-Branch Time-Frequency Feature Fusion Method Based on Terahertz Signals for Identifying Delamination Defects in Composite Materials

Sensors
Composite materials are critical components in advanced equipment such as aerospace, however, delamination defects that readily arise during manufacturing and in service present serious risks to equipment safety.
Shengkai Yan, Jianguo Gao, Qiang Wang, Qiuhan Liu, Jiayang Yu, Jiajin Li, Gaocheng Chen   +6 more
doaj   +1 more source

Evaluation Method of UAV Manufacturing Deviation on Its Aerodynamic Characteristics

Hangkong gongcheng jinzhan, 2018
Aerodynamic shape is very important to UAV. It is necessary to estimate UAV manufacturing deviation on its aerodynamic shape. The point cloud data of manufacturing shape of UAV can be measured by digital photogrammetric system. With the reference of nose,
Bao Xiaoxiang, Sun Kaijun, Fu Yiwei
doaj   +1 more source