Results 31 to 40 of about 1,327,772 (130)
Gaoya dianqi, 2018 电力系统中大部分的雷害事故源于输电线路,为解决线路雷击闪络,造成雷击跳闸这一难题,提出了高速气流灭弧防雷方法。该方法将雷击电弧转移到放电间隙,通过雷电流信号触发气丸爆炸产生高速气流,快速地切断电弧,有效地阻止了雷击跳闸。文中建立高速气流的速度场模型和Mary电弧暂态模型,利用FLUENT有限元分析软件对气流和电弧的耦合作用进行了仿真分析,得出爆炸产生的高速气流使电弧在1.7 ms内熄灭。在高压实验室进行了灭弧试验,通过高速摄像机和示波器监测电弧熄灭过程,试验显示高速气流能在2 ms内熄灭电弧 ...
张华驿 +4 more
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Because of superior transportability and high energy capacity, methanol is regarded as a potential hydrogen carrier. Photocatalytic methanol dehydrogenation offers a sustainable and cost‐effective method for releasing hydrogen. Conventional photocatalysts face challenging obstacles, including the low catalytic efficiency and rapid ...
Rundong Chen +9 more
wiley +1 more source
Dianci bileiqi, 2012 根据气体动理论,气体放电理论和电弧等离子体理论,利用能量守恒定律,建立用于35 kV架空配电线路的高速气流灭弧防雷间隙闪络时工频电弧的建弧模型,用MATLAB软件进行计算仿真,分析高速气流的灭弧特性。仿真计算结果表明,高速气流能在0.016 5 s内吹灭工频电弧。
林盛强, 林宏, 王巨丰
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Light‐activated gas sensors hold significant potential in environmental monitoring and smart Internet of Things (IoT) owing to their advantage in room temperature operation. Nevertheless, due to a narrow light absorption range, high photocarrier recombination rate, and weak redox activity of the sensing material, the performance enhancement of
Jinyong Hu +5 more
wiley +1 more source
Gaoya dianqi, 2019 针对高压直流断路器用的气体绝缘高速机械开关行程短、分闸速度高和机械冲击大的问题,文中提出一种气体缓冲系统用于降低触头运动速度和提高开关机械、电气性能。气体缓冲的高速机械开关的运动涉及瞬态电磁场、气流场和机械场等多物理场问题,文中采用多物理场耦合方法,利用有限元软件建立气体缓冲的高速机械开关动态模型,仿真了气体缓冲的高速机械开关运动特性,并分析了气体缓冲系统参数对开关动态性能的影响。仿真结果表明,电磁斥力机构的金属盘高速运动导致内部气流场变化和产生的气体阻力能有效实现高速机械开关的缓冲 ...
方春恩, 常晓丹
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The urgent environmental crisis caused by polyethylene terephthalate (PET) waste necessitates efficient upcycling strategies. Herein, we establish a novel pathway to transform waste PET plastic into a high‐performance catalytic material for mediating the oxygen evolution reaction (OER). Through a one‐step hydrothermal process, waste PET serves
Xin Wang +5 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Skin wound injuries are often accompanied by bacterial infections and severe inflammation. Especially, M1‐type macrophages at the wound site can trigger a cascade of inflammatory responses, mediating a vicious cycle of inflammation. Meanwhile, hypoxia further exacerbates vascular damage and constriction in the wound microenvironment, thereby ...
Xianfeng Wang +6 more
wiley +1 more source
A Multifunctional Reducing Molecular Dopant for 16% Efficient Tin Perovskite Solar Cells
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Although lead‐based photovoltaics have seen remarkable progress, tin‐based perovskite solar cells (Sn‐PSCs) continue to face challenges due to their limited power conversion efficiency and insufficient operational stability. The primary cause of this performance gap is the susceptibility of Sn2+ to oxidation, which promotes rapid defect ...
Xianyong Zhou +12 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Developing low‐energy‐input electrocatalytic systems for efficient hydrogen production is crucial for advancing sustainable energy technologies. The overall hydrazine splitting (OHzS) has emerged as a promising strategy to reduce the overall energy consumption by replacing the sluggish oxygen evolution reaction.
Haozhou Chen +13 more
wiley +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Developing efficient catalytic thermal desorption systems is of great significance in the field of sustainable soil remediation. Herein, novel Mn–Ce solid solution modified Co3O4 nanocrystals were successfully prepared for the removal of perfluorooctanoic acid (PFOA) in soil.
Yu‐Hao Liu +8 more
wiley +1 more source