Results 31 to 40 of about 10,227 (159)
Dianci bileiqi, 2022 共享铁塔中移动基站的接地标准较为苛刻，需要对传统输电铁塔接地网进行改造以满足基站接地要求。笔者采用场路结合的方法，对接地导体进行分段处理，计算各分段导体的自电阻和互电阻，推导了共享铁塔接地网地电位的求解公式，进而判断接地网地电位的均匀程度。参照现有电力与通信的接地标准，提出了共享铁塔接地网的设计思路以及4种设计方案。计算结果表明，网状结构加垂直接地极的接地网设计方案可保证地电位分布最均匀，最大地电位梯度相比于简单扩大接地网面积的设计方案降了43.83%。
匡宇来 +4 more
doaj
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT The polyanionic compound Na3V2(PO4)3 (NVP) has emerged as a competitive cathode material for sodium‐ion batteries (SIBs), owing to its high‐voltage redox activity (3.4 V vs. the Na+/Na reference couple) and NASICON‐type framework that enables superior ionic conductivity.
Xiaolei Wu +5 more
wiley +1 more source
Dianci bileiqi, 2021 风电场的风机由于大多在海边,风机接地网存在腐蚀严重、接地参数不稳定、冲击电位分布不均等问题,且传统圆环接地装置在高土壤电阻率的条件下,降阻效果不佳、跨步电压较大。在此基础上,笔者提出了一种基于立体均压结构的风机雷电冲击优化方法,采用面积元法和截面积等效法,推导了立体均压结构的地电位及接地电阻公式,并通过CDEGS软件对两种接地装置进行了地电位和跨步电压的仿真对比分析。结果表明,立体均压结构在降低接地电阻和改善地电位分布方面要优于传统圆环接地装置,这为风电场的接地网设计提供了新的参考。
张明达 +5 more
doaj
The Study of EMC Overall Design for Flat-Panel TV [PDF]
, 2008 电磁兼容（EMC，ElectromagneticCompatibility）是当今电子科技领域非常重要的一项技术。电子产品必须符合所销地国家强制的EMC标准，平面电视的设计必须满足EMC标准的要求。 论文按照先理论后实践再理论总结的原则，讨论了平面电视EMC可能涉及的系列问题。首先简要回顾了EMC的起源及发展、相关的EMC的概念及标准,从宏观上针对平面电视的EMC整体方案设计可能碰到的问题进行系统分析及模块化讨论，并在细节上分四个章节讨论了实际设计中重点要处理的问题：包括PCB设计方案、接地处理技术 ...
武建埭
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Developing low‐energy‐input electrocatalytic systems for efficient hydrogen production is crucial for advancing sustainable energy technologies. The overall hydrazine splitting (OHzS) has emerged as a promising strategy to reduce the overall energy consumption by replacing the sluggish oxygen evolution reaction.
Haozhou Chen +13 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Fluxgate sensors with Co‐rich amorphous microwires, widely used for their low noise in magnetic field measurements, encounter significant challenges in high‐temperature environments such as well drilling and geological exploration. Prolonged thermal aging degrades the performance of Co‐rich amorphous microwires, resulting in increased noise ...
Lining Pan +10 more
wiley +1 more source
Dianci bileiqi, 2018 良好的风机接地系统对于风电机组的雷电防护至关重要,必须详细研究风机接地系统的雷击暂态特性。利用EMTP软件建立风机叶片、塔筒和接地系统模型,考虑雷电流冲击作用下接地体的散流特性和火花效应,分析地网暂态电位变化规律。讨论土壤电阻率、地网尺寸、地网形状对接地系统雷击暂态电位的影响,分析引外接地对于降低暂态电位的效果。分析结果表明:冲击电流引起的火花效应能够降低接地系统的冲击接地电阻;地网中心暂态电位随着土壤电阻率的增大而增加;地网尺寸越大、边数越多,接地系统雷击暂态电位越小,但是暂态电位下降幅度越来越缓 ...
万兴玉, 张忠会
doaj +2 more sources
Carbon‐Insertion‐Engineered WS2 Hierarchical Heterostructure Enabling Superior Sodium‐Ion Storage
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Tungsten disulfide (WS2) is considered a promising anode material for sodium‐ion batteries (SIBs). However, its practical application is hindered by poor electrical conductivity, large volume changes during cycling, and sluggish ion diffusion kinetics, which lead to unsatisfactory electrochemical performance.
Xiuli Hu +9 more
wiley +1 more source
2021年青海玛多MS7.4地震前大武台地电场优势方位角异常特征分析
Dizhen xuebao, 2023 为了深入了解2021年5月22日青海省玛多MS7.4地震前是否存在地震电信号，本文利用地电场优势方位角方法对大武地电场的原始资料进行了分析，获得了玛多地震前震中附近场地的岩体裂隙结构变化特征，并结合本次地震震中500 km范围内八个地电场台站的岩体裂隙结构变化和该台记录到的以往震例中大武台地电场优势方位角异常变化与中强地震之间的关系进行了综合分析。结果显示：大武台新旧两套地电场数据的地电场优势方位角在震前11个月出现了显著的同步偏转现象，其中大武旧台在震前两个月优势方位角再次出现大幅度上升 ...
Yuhong Zhao +5 more
doaj +1 more source
Conservation Biology, Volume 40, Issue 1, February 2026.The graphical abstract highlights the research collaboration with fishers through interviews to record fishers' knowledge and participatory monitoring, to provide data on small‐scale fisheries in three clear water rivers (Trombetas, Tapajos and Tocantins).
Renato A. M. Silvano +10 more
wiley +1 more source