Results 41 to 50 of about 357,245 (155)
Gaoya dianqi, 2013 提出一种交流电压下的电声脉冲法空间电荷测试新方法。采用电脉冲作为触发源,利用数字示波器的长存储功能同时获取空间电荷信号和高压交流电压信号,从而避免了传统交流空间电荷测试方法的硬件同步。通过调整脉冲发生器的频率可获取不同相位下的高压交流下的空间电荷响应,并通过平均若干个交流周期的空间电荷信号获得足够信噪比的相位相关的空间电荷信号。通过对低密度聚乙烯工频50 Hz下的空间电荷测量结果表明,在交流电场下,下电极附近区域会形成异号电荷;与传统的交流空间电荷测量系统相比 ...
唐超 +4 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Metal nanoclusters provide abundant catalytically active sites and unique electronic structures that are highly beneficial for enhancing photocatalytic performance; however, their practical application is often hindered by poor photostability.
Yiying Qin +6 more
wiley +1 more source
Dianci bileiqi, 1992 从大量的实验数据中得出了国产ZnO阀片的功率损耗及阻性电流随温度、荷电率变化的特性.从保证ZnO避雷器正常工作时的热稳定性来说,荷电率不宜大于0.85.
何金良, 吴维韩, 姚建国
doaj
Efficient Photocatalytic Removal of Toluene by Synergistic FeCe/TiO2: Performance and Mechanism
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Efficient removal of volatile organic compounds (VOCs) in confined spaces is crucial for environments such as spacecraft and deep‐sea submarines. Metal modification is an effective strategy to enhance the light absorption capacity of titanium dioxide (TiO2) and suppress the recombination of photogenerated charge carriers.
Ke Xu +10 more
wiley +1 more source
Gaoya dianqi, 2007 针对一种高功率重复频率脉冲驱动源的Trigatron开关典型工作条件（输出电流20kA,脉宽25ns,100万次脉冲,累积传输电荷500C）,研制了一种长寿命Trigatron开关,触发电极采用一种四周具有一定数量缺口的圆盘式结构。在峰值电流23 kA,单次电荷传输量0.1C条件下,对开关进行了500 C电荷传输实验。实验后开关触发特性没有劣化,表明开关在典型工作条件下,可以传输大于500C的电荷量。
陈维青 +4 more
doaj
Dianci bileiqi, 2020 IEC 60099-4:2014避雷器国际标准以重复电荷转移能力试验替代长持续时间电流冲击耐受试验,特对不同厂家、不同配方的电阻片进行测试。实验表明:RL配方的电阻片重复电荷转移前后工频电压变化超出标准规定5%的限值,通过8/20μs雷电正反各筛选一次,然后再进行重复电荷转移实验或重复电荷转移实验过程中正反向交叉测试 ...
田冰, 厍海波, 朱成洋, 郭向洋
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The commercialization of lithium–sulfur batteries (Li–S batteries) has been hindered by the shuttle effect of lithium polysulfides (LiPSs) and sluggish redox kinetics. In this study, we constructed a three‐dimensional hollow conductive network host material for sulfur with synergistic enhancement effects.
Jie Yang +6 more
wiley +1 more source
Shiyou jixie, 2015 数字化油田抽油机井示功仪用量多，采用传统方法在实验室内对示功仪载荷进行标定时，不仅工作量大，而且由于不能及时标定而导致载荷测试存在误差，影响功图计产与泵况分析的精度。鉴于此，以实测电动机功率曲线为基础，提出了示功仪载荷在线标定方法。该方法基于实测悬点示功图，考虑平衡装置参数、电动机瞬时效率、胶带减速器与换向机构效率，建立了电动机瞬时输入功率的仿真模型。将仿真电动机功率曲线与实测曲线进行对比，引入2种电动机瞬时输入功率平方和的均方根作为指标，诊断示功仪载荷是否存在漂移，并建立了示功仪载荷漂移量的计算模型 ...
黄伟 +5 more
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Rationally designing an electrocatalyst to achieve stable and efficient urea oxidation reaction (UOR) is crucial but still challenging, especially for ampere‐level application. Herein, Mn and Fe dual‐doped Ni0.85Se (Mn/Fe–Ni0.85Se) catalyst is synthesized via a facile and scalable electrodeposition and followed by selenization.
Guanglin Zhu +6 more
wiley +1 more source
, 1986 电压--频率变换器,它具有一个由差分放大器构成的积分器,一个电平可控脉冲发生器,一个开关控制器和一个精密电荷分配器.该精密电荷分配器是由三个开关,一个定电荷电容,一个参考稳压管,一个充电电阻及一个负电源组成的.该定电荷电容放完电后,通过上述充电电阻,在上述差分放大器的反相输入端和上述负电源之间积分充电到上述参考稳压管的击穿电平而完成定电荷的.较之已有的积分定电荷反馈复原型电压--频率变换器的定电荷方式优越,提高了变换器的精度,稳定性和高频性能 ...
唐军
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