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, 2022 雷神4:爱与雷霆(中字)线上观看-免费《雷神4:爱与雷霆》在线手机视频免费视频《雷神4:爱与雷霆》免费播放观看在线视频「Thor: Love and Thunder」电影2022年《雷神4:爱与雷霆》HD国语完整版免费播放观看雷神4:爱与雷霆(粤语版)中文版高清线上看-GIMY『HK電影』雷神索爾4線上看(玩字幕)_小鴨視頻高清[HD]雷神索爾4(2022)台灣版-完整版-雷神索爾4_ptt〖免費下載〗線上看小鴨(雷神4:爱与雷霆/Thor: Love and Thunder)配音马来西亚, 澳门 ...
雷神4:爱与雷霆(中字)线上观看-免费
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Dianci bileiqi, 2022 架空输电线路遭受雷击会出现很高的暂态过电压，国内外学者对输电线路的首次雷击暂态响应作了大量计算，但未见分析考虑后续雷击的影响。为了全面分析雷击对输电线路的影响，建立了考虑后续雷击输电线路模型，采用该模型对线路暂态电位进行了计算；对比分析了其遭受首次雷击和后续雷击两种情况的暂态电位波形。结果表明：绕击时后续雷击在输电线路上产生的雷电过电压比首次雷击高15.14%;过电压上升时间约等于首次雷击的一半，后续雷击输电线路的危害比首次雷击大；雷击杆塔塔顶时，首次雷击比后续雷击在输电线路中所产生的过电压高一倍左右 ...
罗楚楠, 张胜, 黄一威
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Journal of Healthcare Engineering, Volume 2018, Issue 1, 2018., 2018 A terminology (or coding system) is a formal set of controlled vocabulary in a specific domain. With a well‐defined terminology, each concept in the target domain is assigned with a unique code, which can be identified and processed across different medical systems in an unambiguous way.
Yinsheng Zhang +2 more
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, 2014 磁雷诺数和流体力学中的雷诺数一样, 是一个无量纲参数。它是用于判断磁通（参见注释1）在磁流体（参见注释2）中是处于冻结还是扩散的一个参数。利用磁通冻结的概念，可以较直观地理解用常规方法产生电磁脉冲的原理。在现代社会中，电磁脉冲有着相当广泛的应用，这里我们通过分析电磁脉冲武器的工作原理，来看看它和磁流体力学中一些相关知识的关系。 以往的经验表明，现代化战争大部分都以电子战的形式拉开序幕。而电磁脉冲武器无疑是电子战武器库中的一个重要成员。在1999年北约轰炸南联盟的战争中，美国第一次使用了电磁脉冲炸弹 ...
林烈
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Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT High‐entropy oxides (HEOs) are promising for microwave absorption but suffer from a trade‐off between impedance matching and attenuation, often requiring high filling ratios (> 50 wt%). Herein, we propose a “lattice‐spin” dual‐regulation strategy by introducing giant‐radius Bi into a single‐phase HEO solid solution.
Junwei Zhang +11 more
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Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The growing deployment of high‐frequency electronic systems has intensified the demand for high‐performance microwave absorption materials. In this work, we developed La‐V co‐substituted barium hexaferrites, Ba1‐xLaxFe11.9V0.1O19 (BLFVO), via a sol‐gel route.
Zhihui Yang +7 more
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Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT In recent years, materials capable of achieving efficient electromagnetic wave (EMW) absorption over a broad frequency range have attracted widespread attention. Such materials are not only significant in mitigating electromagnetic interference and pollution caused by the extensive use of electronic devices but also demonstrate outstanding ...
Maoxia Lu +7 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Developing Cu‐based composites that simultaneously achieve ultra‐high strength, ductility, and electrical conductivity remains critical for advanced electrical contact applications. In this work, multiphase AlCrCuFeNi2.5 high‐entropy alloy (HEA) reinforcements are incorporated into CuCrZr matrix via spark plasma sintering (SPS) and annealing ...
Tao Hong +8 more
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, 1982 一、引言由于操作过电压和雷击,时常造成电力系统短路现象,系统容量愈大,瞬态电弧电流幅值愈大(可达数万至数百万安,持续时间约几个毫秒),造成的损害和影响范围也愈大。因此,测量瞬态电弧电流对于采取预防措施 ...
胡昌信
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Dianci bileiqi, 2020 由雷击产生的雷电过电压通常会对风-光混合发电系统中的电气设备造成严重损害,为了减少雷电过电压对风-光混合发电系统造成的危害,文中对雷电过电压进行了深入研究。在分析雷击对风-光混合发电系统暂态影响的基础上,利用PSCAD/EMTDC软件搭建了风-光混合发电系统仿真模型,通过仿真模拟雷电流侵入风-光混合发电系统的光伏发电场直流侧与风力发电场侧,研究风-光混合发电系统不同位置雷电过电压的变化情况,得到首次负雷击和后续负雷击的雷电过电压及雷电流波形。
王婉婷
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