Results 1 to 10 of about 2,660,702 (309)

Full Band Compact Power Arm Subsystem With High Directive Sample

IEEE Access, 2020
An output arm is the first subsystem in the microwave components chain connected immediately after the power amplifier. These arms are responsible for transferring the signal from the output port of the power amplifier to the standard line of the system.
Mahmoud Elsaadany, Shoukry I. Shams, Mohamed Mamdouh M. Ali, Abdel-Razik Sebak, Walaa Hamouda   +4 more
doaj   +1 more source

An EIRP Measurement Method of High-Power Microwave Systems Based on Near-Field Testing

International Journal of Antennas and Propagation
The equivalent isotropic radiated power (EIRP) of high-power microwave (HPM) systems is a core-evaluating indicator. In practical testing, locating a suitable test site for the far-field method becomes challenging due to the requisite antenna separation.
Xianggang Hu, Jiancang Su, Mingtao Zhang, Xi Li, Dingkun Ma, Jingang Gong, Kewei Cheng, Jia Liu, Jiande Zhang, Rui Li, Jie Cheng, Shaotong Wu   +11 more
doaj   +1 more source

An improved YOLOv9-based method for identifying insulator temperature anomalies

Journal of Engineering and Applied Science
Abnormal heating of transmission-line insulators is often an early indicator of impending faults. Timely and accurate identification of overheated regions in infrared imagery is therefore critical for the safe operation of power grids.
Cheng Chi, Xiaomeng Yang, Yang Yi, Lihui Liang, Min Yan, Pengfei Ji   +5 more
doaj   +1 more source

A Rapid Prediction Method of Three‐Dimensional Total Electric Field Under UHVDC Transmission Lines With Buildings Nearby

High Voltage
The proliferation of ultra‐high voltage direct current (UHVDC) transmission technology has heightened regulatory oversight of electromagnetic fields around buildings.
Tahan Wang, Li Xie, Kun He, Jiayu Lu
doaj   +1 more source

Enhanced Fault-Tolerant Robust Deadbeat Predictive Control for Nine-Level ANPC-Based Converter

IEEE Access, 2022
Deadbeat model predictive control (DB-MPC) is one of the advanced promising control methods for power converters thanks to its simplicity, high steady-state performance and fast dynamic response.
Ibrahim Harbi, Mostafa Ahmed, Marcelo Lobo Heldwein, Ralph Kennel, Mohamed Abdelrahem   +4 more
doaj   +1 more source

Depth hole filling and optimizing method based on binocular parallax image

IET Control Theory & Applications, 2023
Environment perception is one of the most vital function for autonomous robots while performing complex tasks in dynamic environment. In binocular stereo vision algorithm, the calculation of disparity image depends on matching algorithm, and the ...
Xiaoxiang Han, Qingmiao Chen, Qinyong Ma, Xiaoliang Yang, Hongyue Men, Yue Su, Xiaozhuang Tian   +6 more
doaj   +1 more source

High power lasers

Encyclopedia
High-power lasers play an important role in modern science, industry, and medicine. A signifi-cant milestone was reached on December 5, 2022, when Inertial Confinement Nuclear Fusion (ICF) achieved scientific breakeven, releasing more energy than the input laser energy. Additionally, Extreme Ultraviolet Lithography (EUVL) has enabled the development of
openaire   +2 more sources

Federated knowledge distillation for enhanced insulator defect detection in resource‐constrained environments

IET Computer Vision
Insulator defect detection is crucial for the stable operation of power systems. It has become a mainstream research direction to realise insulator defect detection based on the combination of line images captured by UAVs and deep learning techniques ...
Xiaohu Huang, Minghui Jia, Xianghua Tai, Wei Wang, Qi Hu, Dongping Liu, Peiheng Guo, Shengxiang Tian, Dequan Yan, Haishan Han   +9 more
doaj   +1 more source

A 3.2 kW Single Stage Narrow Linewidth Fiber Amplifier Emitting at 1050 nm

Micromachines
In this paper, we have demonstrated a narrow linewidth high power fiber laser emitting at a short wavelength of ~1050 nm. The fiber laser is based on a structure of master oscillator power amplification (MOPA) with an optimized fiber Bragg-grating-based ...
Xiaoxi Liu, Xin Tian, Binyu Rao, Baolai Yang, Xiaoming Xi, Zefeng Wang   +5 more
doaj   +1 more source

Epitaxy of III-Nitrides on β-Ga₂O₃ and Its Vertical Structure LEDs

Micromachines, 2019
β-Ga2O3, characterized with high n-type conductivity, little lattice mismatch with III-Nitrides, high transparency (>80%) in blue, and UVA (400–320 nm) as well as UVB (320–280 nm) regions, has great potential as the substrate for ...
Weijiang Li, Xiang Zhang, Ruilin Meng, Jianchang Yan, Junxi Wang, Jinmin Li, Tongbo Wei   +6 more
doaj   +1 more source