Results 21 to 30 of about 618,499 (259)

Ion-Doped Photonic Crystal Fiber Lasers

Frontiers in Chemistry, 2021
Compared with conventional solid-state lasers, fiber lasers have the advantages of small size, simple cooling system, and good output beam quality, enabling them an extended service lifetime in industrialized environments.
Ya-Chong Hou, Ya-Chong Hou, Yun-Fei Li, Yun-Fei Li, Xiao-Fan Xie, Xiao-Fan Xie, Zi-Long Kou, Zi-Long Kou, Yue Lu, Yue Lu, Si-Ying Chen, Si-Ying Chen, Yulei Wang, Yulei Wang, Zhiwei Lu, Zhiwei Lu   +15 more
doaj   +1 more source

Parameter Analysis and Optimization of Class-E Power Amplifier Used in Wireless Power Transfer System

Energies, 2019
In this paper, a steady-state matrix analysis method is introduced to analyze the output characteristics of the class-E power amplifier used in a wireless power transfer (WPT) system, which takes the inductance resistance, on-resistance and leakage ...
Feng Wen, Rui Li
doaj   +1 more source

An Experimental Investigation on Output Power Enhancement With Offline Reconfiguration for Non-Uniform Aging Photovoltaic Array to Maximise Economic Benefit

IEEE Access, 2021
There are several non-uniform effects on photovoltaic (PV) modules related to aging in a PV array. These subsequently bring about non-uniform operating parameters with individual PV modules, causing a variance in the PV array performance.
Mohammed Alkahtani, Jiafeng Zhou, Yihua Hu, Fahad Alkasmoul, Zeryab Hassan Kiani, Colin Sokol Kuka   +5 more
doaj   +1 more source

Analysis and Experiment of Laser Wireless Power Transmission Based on Photovoltaic Panel

Photonics, 2022
A photovoltaic panels is a device used for converting solar and other energy into electrical energy. In laser wireless power transmission, there is a problem that the conversion efficiency of the photovoltaic panel is not as high as that of a single ...
Tiefeng He, Guoliang Zheng, Xing Liu, Qingyang Wu, Meng Wang, Can Yang, Zhijian Lv   +6 more
doaj   +1 more source

Output characteristics of series-parallel triboelectric nanogenerators

Nanotechnology, 2023
Abstract To tackle the problem of the low output power of triboelectric nanogenerators (TENGs), the output characteristics of multiple TENGs in series and parallel were explored. An experimental device for multilayer TENGs was developed.
Xinsheng He, Huaiyi Zhang, Jiajie Jiang, Xin Liu   +3 more
openaire   +2 more sources

Cost Effective Offline Reconfiguration for Large-Scale Non-Uniformly Aging Photovoltaic Arrays Efficiency Enhancement

IEEE Access, 2020
In the past decades, a huge number of large-scale photovoltaic (PV) plants have been constructed all around the world. However, the capital and operational costs can be high, which limits their widespread applications.
Zuyu Wu, Chen Zhang, Mohammed Alkahtani, Yihua Hu, Jiangfeng Zhang   +4 more
doaj   +1 more source

Improving Characteristics of FSMs With Mixed Codes of Outputs

IEEE Access, 2022
Practically, any digital system includes sequential blocks. This paper considers a case when LUT-based sequential blocks are represented by Mealy finite state machines (FSMs). The LUT count is one of the most important characteristics of an FSM circuit. In this paper, a method is proposed which aims at decreasing the LUT counts of FPGA-based Mealy FSMs
Alexander Barkalov 0001, Larysa Titarenko, Slawomir Chmielewski, Kamil Mielcarek   +3 more
openaire   +2 more sources

Impedance stability analysis and impedance remodelling of matrix converter grid-connected system

The Journal of Engineering, 2020
Matrix converter has become one of the research hotspots of power electronic converter due to its excellent input and output characteristics and adjustable power factor.
Rutian Wang, Guoqing He, Bo Zhang
doaj   +1 more source

Optimal Photovoltaic Array Dynamic Reconfiguration Strategy Based on Direct Power Evaluation

IEEE Access, 2020
In actual operation, photovoltaic arrays inevitably encounter shadow problems, resulting in a power output decline and multiple peaks in the output characteristics.
Zhen Zhu, Meiyi Hou, Lei Ding, Guofang Zhu, Zhaoyang Jin   +4 more
doaj   +1 more source

Investigation of the impact of the GaN cap layer on DC and RF performance in N-polar AlGaN/GaN HEMTs

Frontiers in Physics
In this paper, we investigated the logic and RF performance of nanostructure N-polar AlGaN/GaN high-electron mobility transistors (HEMTs) with and without GaN cap layer.
Chumki Das, Kaushik Mazumdar
doaj   +1 more source