Results 41 to 50 of about 18,181 (263)

Study on the streamer inception characteristics under positive lightning impulse voltage

AIP Advances, 2017
The streamer is the main process in an air gap discharge, and the inception characteristics of streamers have been widely applied in engineering. Streamer inception characteristics under DC voltage have been studied by many researchers, but the inception
Zezhong Wang, Yinan Geng
doaj   +1 more source

Detection Technique of Partial Discharges at Impulse Voltage with Appropriate Filter Settings for Signal Separation

Energies, 2019
Due to the increased utilization of electric converters feeding rotating high voltage motors, their insulation is subject to transient impulse and high frequency oscillating voltages.
Karsten Backhaus, Lena Elspaß, Konstantin Pasche   +2 more
doaj   +1 more source

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

FEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil, Anna Corrà, Annalisa Scapolatiello, Chengxiang Qiu, Gianluca Amadei   +4 more
wiley   +1 more source

Cumulative degradation of electrical properties in polypropylene insulation for AC cables under repeated impulse voltage stress

High Voltage
In modern power transmission systems, AC cables are increasingly integrated with overhead lines, forming hybrid networks. These cables are frequently exposed to repeated impulse voltages from the overhead lines.
Yunpeng Zhan, Shuai Hou, Mingli Fu, Lingmeng Fan, Binjie Zhang, Kai Yu, Xiaolei Zhao, Yi Yin   +7 more
doaj   +1 more source

Tower Air-gaps discharge characteristics and insulation coordination for UHV AC double-circuit line

The Journal of Engineering, 2019
In order to give out inverse V-type insulator tower air-gaps configuration of double-circuit UHV AC power transmission line, different distance air-gaps from high-voltage electrode to tower frame discharge tests of inverse V-string are carried out ...
Huo Feng, Nan Jing, Ye Qiming, Ma Yeming
doaj   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

FEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa, Shinya Sugimoto, Toshiro Sato   +2 more
wiley   +1 more source

Equivalent circuit model of tower based on full-wave analysis

Energy Reports, 2022
The tower model is very important for the assessment of lightning protection for transmission line. The parameters of tower model mainly rely on the impulse experiments of tower.
Chun Li, Shengfu Wang, Wei Wang, Chenglei Zhang, Ling Jiang, Xishan Wen, Hailiang Lu   +6 more
doaj   +1 more source

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

FEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee, Junho Jeong, Chae Yeong Lee, Hyunjoon Cho, Man Hwan Oh, Je Chul Lee, Jee‐Young Lee, Yangmee Kim   +7 more
wiley   +1 more source

Effect of surface modification of electrodes on charge injection and dielectric characteristics of propylene carbonate

High Voltage, 2019
Space charge injected into a liquid dielectric by an electrode under an impulse voltage causes the electric field to be distorted, which affects the dielectric's insulation performance.
Shilin Wu, Qing Yang, Qing Yang, Tao Shao, Tao Shao, Zhaotian Zhang, Lingyu Huang   +6 more
doaj   +1 more source

Research on large-capacity impulse test technology for distribution transformer based on energy storage intelligent power

Energy Reports, 2022
Large-capacity impulse test of distribution transformer requires a large amount of instantaneous energy, while the impulse mode of conventional dedicated high-voltage line and generator requires synchronous switch, adjusted impedance, generator, etc ...
Bo Niu, Xutao Wu, Jiaying Yu, Hong Wu, Weifeng Liu   +4 more
doaj   +1 more source