Results 21 to 30 of about 1,030 (244)

Small Antenna Design of Triple Band for WIFI 6E and WLAN Applications in the Narrow Border Laptop Computer

International Journal of Antennas and Propagation, 2021
This paper presents the design of a small antenna for use in a wireless local area network (WLAN) and Wi-fi 6E on a narrow-border laptop. The dimensions of the antenna are 43 × 3 × 0.4 mm3, and it features a grounding system simulated by a 200 × 260 mm2 ...
Wei-Chiang Jhang, Jwo-Shiun Sun
doaj   +1 more source

Optical Feshbach resonances and ground-state-molecule production in the RbHg system [PDF]

Physical Review A, 2017
We present the prospects for photoassociation, optical control of interspecies scattering lengths and finally, the production of ultracold absolute ground state molecules in the Rb+Hg system. We use the "gold standard" ab initio methods for the calculations of ground (CCSD(T)) and excited state (EOM-CCSD) potential curves.
Borkowski, Mateusz, Rodriguez, Rodolfo Muñoz, Kosicki, Maciej B., Ciuryło, Roman, Żuchowski, Piotr S.   +4 more
openaire   +2 more sources

Research of characteristics of transient pulse in coal mine resonant grounding system

Gong-kuang zidonghua, 2014
By means of deduction of zero-sequence current expressions when single-phase grounding fault occurs in single substation mode and multi-substation mode of coal mine resonant grounding system, polarity relationship between transient pulse of fault line ...
WANG Jinhong
doaj   +1 more source

Faulty Feeder Detection Method Based on VMD–FFT and Pearson Correlation Coefficient of Non-Power Frequency Component in Resonant Grounded Systems

Energies, 2020
Through analyzing the transient components and transient characteristics in transient zero-sequence current (TZSC), a novel fault feeder detection method based on the transient correlation of non-power frequency components (NPFCs) for the resonant ...
Kewen Wei, Jing Zhang, Yu He, Gang Yao, Yikun Zhang   +4 more
doaj   +1 more source

Ferromagnetic resonance over-voltage identification method based on Gram angle field

Energy Reports, 2022
In neutral point non-grounding systems with 35 kV and below, ferromagnetic resonance over-voltage faults often occurs, which brings safety hazards to power systems.
Qiong Li, Yang Zou, Guo Hua Long, Wenbao Wu   +3 more
doaj   +1 more source

Faulty Feeder Identification and Fault Area Localization in Resonant Grounding System Based on Wavelet Packet and Bayesian Classifier

Journal of Modern Power Systems and Clean Energy, 2020
Accurate fault area localization is a challenging problem in resonant grounding systems (RGSs). Accordingly, this paper proposes a novel two-stage localization method for single-phase earth faults in RGSs.
Jingwen Chen, Enliang Chu, Yingchun Li, Baoji Yun, Hongshe Dang, Yali Yang   +5 more
doaj   +1 more source

Optimisation Method for Pre-set Arc Suppression Coil Damping Resistors Enhancing Ground Fault Detection [PDF]

Zhengzhou Daxue xuebao. Gongxue ban
As a key component of pre-set arc suppression coil, the damping resistor is currently configured primarily to suppress series resonance overvoltage and prevent protection maloperation during normal operation.
ZHANG Jianbin, WANG Juncheng, DONG Xuan, LI Jingli, ZHANG Huijie   +4 more
doaj   +1 more source

Fault Line Selection Method Based on Transfer Learning Depthwise Separable Convolutional Neural Network

Journal of Electrical and Computer Engineering, 2021
With the continuous development of artificial intelligence technology, the value of massive power data has been widely considered. Aiming at the problem of single-phase-to-ground fault line selection in resonant grounding system, a fault line selection ...
Haixia Zhang, Wenao Cheng
doaj   +1 more source

Fault line selection method for earth faults occurred in different phases of two feeders connected to the same bus based on the ratio of zero-sequence admittance amplitude

电力工程技术
When the earth faults occur in different phases of two feeders connected to the same bus in the resonant grounding system, the conventional fault line selection devices are inaccurate.
HAN Jie, LIU Zhiyong, ZHOU Qilin, TONG Rui, LING Yuchang, LIANG Guokai   +5 more
doaj   +1 more source

Microbiome‐blood–brain barrier interactions in aging — mechanisms and therapeutic potential

FEBS Letters, EarlyView.
Aging reshapes the gut microbiome (↓SCFA‐producing commensals; ↑pro‐inflammatory outputs), shifting circulating metabolites (↓SCFAs; ↑LPS, ↑TMAO, ↑PAA) that act at the BBB to increase nonspecific transcytosis, alter transport, and promote astrocyte reactivity, heightening brain vulnerability.
Daniel Cuervo‐Zanatta, Hari Baskar Balasubramanian, Amir Pasokh, Marietta Zille   +3 more
wiley   +1 more source