Results 31 to 40 of about 1,252,494 (153)
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, 2020 处于高土壤电阻率地区的变电站,其接地网的接地性能难以满足要求。以高土壤电阻率地区某220 kV变电站为例,对其接地方案进行优化设计研究。基于接地分析软件CDEGS,完成了接地网网格优化、二次电缆芯皮电位差的计算及接地深井等降阻措施研究;基于电磁暂态分析软件EMTP,计算了变电站低压避雷器耐受地电位升上限,结合变电站设备的运行参数及规范对接地参数的要求,得到了地电位升允许上限值。最后考虑网格优化、降阻措施和技术经济性,给出了高土壤电阻率地区某220 kV变电站接地网的设计方案。
邢琳 +4 more
doaj
Dianci bileiqi, 2023 由于雷电流冲击接地网时，造成地网将产生较高的地电位抬升，强大的过电压会将线路或装置的绝缘材料击穿损坏。基于人工引雷实验，观测两个相距10 m的雷击地网和邻近地网的地电位抬升电压特征，提出一种采用有限元法建立仿真模型，求解接地网三维瞬间变化，以此分析雷电流在接地网中的分布规律的研究方法。采用有限元仿真软件构建电磁暂态模型，将试验数据和仿真数据进行对比，得出结论，1)雷电流回击引起雷击地网和邻近地网电压瞬间都有明显的抬升，邻近地网GPR电压幅值上出现较大的衰减。2)雷电流是导致雷击地网GPR的主要因素 ...
冉冉 +5 more
doaj
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
, 2020 本实用新型涉及输电线路运行维护机器人，具体地说是一种带电更换悬垂绝缘子串等电位机器人。包括爬行机构及设置于爬行机构上的作业手臂Ⅰ、作业手臂Ⅱ及环形抱夹装置，其中环形抱夹装置位于作业手臂Ⅰ和作业手臂Ⅱ的上方，爬行机构可带动作业手臂Ⅰ、作业手臂Ⅱ及环形抱夹装置沿绝缘子串的高度方向运动；环形抱夹装置用于夹持绝缘子串进行定位；作业手臂I和作业手臂II配合完成输电线路绝缘子串的辅助更换作业任务。本实用新型代替等电位电工带电作业，保证了人员安全，同时装置本体在封闭的绝缘杆框架内工作，保证装置不会从高空脱落，安全性好，
王岩 +8 more
core
Dianci bileiqi, 2018 在对变电站接地网状态测试评估中,接地阻抗是一个重要参数。在实际测量中,很难断开架空地线与地网之间的联系。但若要准确计算得到变电站的接地阻抗值,则需要对接地网的分流系数进行测量。而对于大型变电站,分流系数的测量十分繁琐,且容易出现误差。根据国家相关标准可知,变电站的接地阻抗允许值是根据地电位升允许值、最大入地短路电流确定的。由此可以换种角度,通过测量计算变电站接地网的最大地电位升,与地电位升允许值比较来判断接地网的接地阻抗是否符合要求,即不需要准确测量得到变电站接地阻抗值 ...
田妍 +5 more
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Dianci bileiqi, 2020 利用人工触发闪电试验对外浮顶油罐模型雷电感应过电压波形特征进行分析。在外浮顶油罐模型接地的情况下,当回击电流峰值范围为-7. 07 k A～-20. 84 kA时,引起的地电位抬升电压峰值在-4 583. 3 V至-12 333. 0 V之间,相应的罐壁与浮盘间的电位差峰值范围为-916. 7 V～-3 250.
陈思学 +5 more
doaj
Dianci bileiqi, 2022 为深入研究不同形状接地体的冲击特性差异，指导输电线路杆塔的接地设计，笔者分别对圆环形接地体与人字形接地体进行研究。先利用CDEGS软件，对二者进行建模仿真，通过正反傅里叶变换，得到其各自的时频域冲击特性响应，再进行量化比较。结果表明：当土壤电阻率为200Ω·m时，圆环形接地体的冲击接地电阻、地电位升高、跨步电压均高于相同周长下人字形接地体；而当土壤电阻率为1 200Ω·m时，圆环形接地体的冲击接地电阻、地电位升高、跨步电压均低于相同周长下人字形接地体。当入地电流频率低于10 kHz时 ...
石发科 +5 more
doaj
Yttrium Addition Co‐Enhances the Plasticity and Corrosion Resistance of TiB2‐Refined Al‐Mg‐Zn Alloys
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT To address the degradation of corrosion resistance induced by Al‐5Ti‐B grain refiner during the strengthening of Al‐Mg‐Zn alloys, this study innovatively employed a rare earth element yttrium (Y) alloying strategy to achieve synergistic enhancement of mechanical strength and corrosion resistance.
Wen‐Tao Qin +9 more
wiley +1 more source
Gallium‐Doped α‐MnO2 Cathode for High‐Performance Aqueous Zinc‐Ion Batteries
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Rechargeable aqueous zinc‐ion batteries (ZIBs) have received significant attention because of their high safety and low cost. MnO2 as a cathode material hampers the application of ZIBs due to its structural instability and dissolution during the operation of the battery.
Wen‐yu Xu +13 more
wiley +1 more source