Results 11 to 20 of about 775 (127)
Kongjian kexue xuebao, 2023 利用有限元分析方法开展大型磁屏蔽室的仿真分析，完成了高精度矢量磁力仪地面定标用大型磁屏蔽室的建模和性能仿真计算，从屏蔽效能、开口影响及内部磁场均匀度等方面对磁屏蔽室仿真计算和实测结果进行对比。结果表明，磁屏蔽空间内部中心区域的剩磁实测数值与仿真结果一致性较好，剩磁分布趋势基本一致，证明有限元分析方法在磁屏蔽室屏蔽性能定量分析的可行性。通过有限元分析方法，能够实现磁屏蔽室开口剩磁影响的定量计算，为磁屏蔽室门及通风孔设计提供依据；同时可以对内部磁场均匀区大小、残余梯度进行验证 ...
李 志宏 +3 more
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Lughawiyah: Journal of Arabic Education and Linguistics, 2023 This article aims to analyze the beautiful verses of As─ülib Bal─üghiyyah┬á and its meaning in Surah Al-Fath, because Surah Al-Fath has Uslub which contains secrets and wisdom of the victory of Muslims, the forgiveness of Allah S.W.T, as well as the events of B─üiÔÇÖu Ridw─ün and Shulhu-l-Hudaibiyyah, by using very beautiful languages and has a high m ...
Fairuz Subakir Ahmad +3 more
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Policy &Internet, Volume 15, Issue 2, Page 223-242, June 2023., 2023 Abstract Drawing on an online survey of mayors from the German federal state of Baden‐Wuerttemberg this article analyses (1) to what extent social media is used abusively at the municipal level, (2) how mayors react to hate speech and (3) whether the experience of such insulting comments and threats is correlated with their perception of social media ...
Rafael Bauschke, Sebastian Jäckle
wiley +1 more source
Dianci bileiqi, 2021 基于多导线的Agrawal场-线耦合模型,采用"两步走"方法,从理论层面研究了屏蔽线和三相线路的空间结构变化对耦合电压峰值的影响。笔者从两个方面进行讨论:1)屏蔽线的高度对耦合电压的影响,其他条件不变,发现屏蔽线越高,相线受到的屏蔽效应呈现先增大后减小的趋势。线路结构两边的两根相线在屏蔽线高度为17.05 m时,屏蔽效应达到最大;但对中间的一根相线而言,屏蔽线高度为12.05 m时,屏蔽效应最大。2)保持屏蔽线和三相线的高度不变,通过改变三相线的水平距离(屏蔽线的水平间距也随之改变 ...
宁欣婷 +4 more
doaj
基于SVM-PSO混合算法的12kV开关柜触头盒双屏蔽结构三维电场优化研究
Gaoya dianqi, 2023 开关柜在长期运行过程中可能会因触头盒电场集中导致放电甚至击穿事故，采用双屏蔽结构是改善开关柜触头盒内电场分布的有效方法。为此，以KYN28A-12开关柜为研究对象，提出了一种基于SVM-PSO混合算法的开关柜触头盒双屏蔽结构三维电场优化方法。首先，在Comsol Multiphysics中建立了开关柜的三维仿真模型，分析了接地屏蔽长度、高压屏蔽半径和长度对触头盒、接地屏蔽和高压屏蔽表面场强的影响规律；然后，构建了含触头盒、接地屏蔽和高压屏蔽表面场强3个优化目标的评价函数 ...
舒胜文 +5 more
doaj
Dianci bileiqi, 2022 为了降低变电站巡检机器人磁耦合谐振式无线充电系统正常工作时对附近工作人员安全造成的危害，将高频辐射降低到国标标准限值内，笔者提出了一种复合结构式铝板屏蔽方案，采用有限元方法仿真计算巡检机器人无线充电系统电磁辐射，计算尺寸、层数对屏蔽板屏蔽效果的影响，并对比分析六种复合结构式屏蔽装置的屏蔽效果。结果表明：当增大屏蔽板尺寸和增加屏蔽板层数时，无线充电对外辐射磁场强度出现明显下降；采用复合结构式屏蔽板能够将无线充电系统的对外辐射磁场幅值基本降低到国标限值以内。
刘乐 +5 more
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Al‐based neutron shielding materials suffer from poor laser powder bed fusion (LPBF) processibility, hindering their simultaneous achievement of good printability and exceptional mechanical properties. In this work, the newly developed rare‐earth Al alloy (i.e., Al‐6Mg‐5Gd) was processed by LPBF technique to meet the printability, mechanical ...
Chen Yang +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT The rapid advancement of 5G communication technology has intensified electromagnetic pollution, creating an urgent demand for flexible multifunctional fabrics with efficient electromagnetic interference (EMI) shielding performance. This study proposes a novel material‐stacked construction strategy to fabricate multifunctional MXene/cellulose ...
Zong‐Kai Yan +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Lightweight and lead‐free radiation shielding materials remain urgently needed. This work designed a fluorite high‐entropy oxide (FHEO) system through a combined computational–experimental route. Density functional theory based on special quasi‐random structures was used to identify thermodynamically stable fluorites from a wide compositional ...
Xiangjie Duan +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT With the rapid growth demand for advanced integrated electronic systems, lightweight flexible electromagnetic interference (EMI) shielding films integrated with functional properties, such as excellent mechanical properties and self‐healing capability, are a research focus in high‐tech functional materials. Herein, a sandwich‐structured aramid
Dan Guo +9 more
wiley +1 more source