Results 31 to 40 of about 1,027,656 (142)
, 2005 采用数值分析的方法,对含三维埋藏椭圆型裂纹的构件放电瞬间的耦合场进行分析。计算脉冲放电瞬间椭圆形裂纹尖端附近的温度场和等效应力场的分布状态;并通过改变模型尺寸的模拟分析影响放电参数的主要因素。计算结果表明,由于电流绕流产生的焦耳热源的作用,裂纹尖端处温度瞬时急剧升高,但沿椭圆形裂纹尖端的温度值并不相同,最大值发生在长轴附近,只要放电电流的强度足够大,可以使椭圆环形裂尖均熔化形成焊口,并围绕环形裂纹尖端附近产生很大的热压应力场,可有效地遏制裂纹的扩展;在相同放电电流强度下 ...
白象忠, 郑丽娟, 付宇明
core +2 more sources
Dianci bileiqi, 2023 复合绝缘子被广泛应用于输电线路中，在长期高温、盐雾、鸟啄等工况下，会产生护套破损及表面污秽等缺陷，威胁电力系统正常运行。本研究基于FXBW4-35/70棒形悬式复合绝缘子，仿真分析了不同破损位置、长度、宽度、深度及表面存在污秽情况下的电场分布特征，结果表明：低压侧护套破损时场强畸变严重，达到2.11 kV/cm;随着高压侧护套破损长度及宽度增加，破损处最大场强畸变率分别为27%及84%;破损处场强随破损深度增大而升高，最严重时场强畸变率可达70%;湿污会进一步提升电场强度，其影响程度随电导率的增加而增加，
王子豪 +5 more
doaj
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Composite materials hold significant potential for abrasive sealing, yet composite materials used for abrasive sealing fall short in service durability under extreme environments. Here, a controllable strategy for adjusting pore structure is proposed, aiming to design a YSZ(ESP)/BN@ZrO2‐polyester coating with hybrid micron/nanometer ...
Shuang Yu +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The rapid expansion of data‐intensive applications has highlighted the fundamental limitations of traditional CMOS‐based von Neumann architectures, particularly in terms of power efficiency, latency, and flexibility. Spin logic devices utilizing spin–orbit torque (SOT) present a promising pathway for nonvolatile, low‐power, and in‐memory ...
Ke‐Yi Wu +5 more
wiley +1 more source
基于有限元方法的35 kV干式空心并联电抗器匝间电场分布研究
Gaoya dianqi, 2018 深入开展35 k V干式空心电抗器匝间电场分布研究,对35 k V干式空心电抗器匝间放电故障分析和提高35 k V干式空心电抗器的可靠运行具有重要意义。为此,文中基于有限元仿真计算开展了35 k V干式空心电抗器匝间电场分布研究。研究结果表明:35 k V干式空心电抗器外层支路匝间电场强度大于内层支路的匝间电场强度,且由于35 k V干式空心电抗器电磁场分布的特殊性导致了每层支路中端部的匝间电场强度小于中间部分的匝间电场强度;10 k Hz下的匝间电压比与50 Hz下的匝间电压比近似相同。
彭庆军 +6 more
doaj
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The Janus structure of ZnIn2S4 (ZIS) endows it with an intrinsic built‐in electric field that effectively drives photogenerated charge separation. However, this very structure also renders the predominant (001) facet (In–S termination) catalytically inert due to its low electron density and high energy barrier for the hydrogen evolution ...
Qingao Zhou +8 more
wiley +1 more source
, 2014 本发明涉及质谱仪电离源，具体的说是一种射频电场增强的单光子-化学电离源，该电离源包括真空紫外光源，离子产生和传输区以及电离室真空腔体；在电离离子产生和传输区内平行、间隔设置有若干传输电极和真空差分孔电极；沿电极的轴线方向都开有通孔，真空紫外光源发射的紫外光沿此轴线方向入射到孔电极上；传输电极和孔电极上分别施加有直流电压，其中一个传输电极上叠加有射频电压。通过对射频电压开启和关闭的控制，可以实现两种不同电离方式的切换。本发明所涉及的电离源在包含单光子电离源的基础上 ...
侯可勇 +7 more
core
Cs2SnI6: A Perovskite‐Based Electromagnetic Wave Absorbing Material
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Lead halide perovskites and carbon‐based materials are interesting, high‐performing electromagnetic wave absorbing materials. However, only a few studies have been carried out to examine in detail the electromagnetic wave absorption properties of these materials.
Fei Han +11 more
wiley +1 more source
Gaoya dianqi, 2007 针对一种中压真空灭弧室模型,研究开距变化时触头有效面积对击穿电场强度的影响。通过电场仿真计算得到了开距对触头间隙内有效面积的影响;通过冲击耐压试验得到了开距与击穿电场强度之间的关系。在此基础上发现在不同的开距范围内,触头间隙内的有效面积对击穿电场强度的影响不同:在开距1～2 mm范围内击穿电场强度Ebd随着触头有效面积Se的增大而增加;在开距2～6 mm范围内击穿电场强度Ebd随着触头有效面积Se的增大而减小。
程少勇 +3 more
doaj
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The inherent trade‐off between high saturation induction (Bs) and low core loss in soft magnetic materials presents a challenge in the development of high‐frequency power electronics. Here, a processing approach that combines accelerated Cu ordering with dual magnetic anisotropy control in high‐Bs Fe‐based nanostructured cores is examined ...
Xiaoying Li +11 more
wiley +1 more source