Results 31 to 40 of about 10,510 (166)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Expanding near‐infrared (NIR) spectral response and utilizing ultraviolet (UV) photons are effective strategies for enhancing the power conversion efficiency (PCE) of lead halide perovskite solar cells (PSCs). However, the range of NIR spectral response extension and the utilization of UV light for devices are not enough, and the loss of ...
Li He +9 more
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Gaoya dianqi, 2015 为了通过电机电流检测隔离开关的机械故障,对GW6H-252型隔离开关电机输出轴扭矩和电机相电流的关系进行研究。研制出一套电流监测系统,现场监测隔离开关动作过程中电机定子相电流和电机输出轴扭矩,采用希尔伯特变换提取电流包络,建立电机输出轴扭矩和电流包络的函数关系,并采用最小二乘法进行曲线拟合。研究结果表明,GW6H-252型隔离开关电机输出轴扭矩和电机相电流包络之间存在二次函数关系,函数相关度高达0.98,因此可以通过监测电机定子相电流对电机输出轴扭矩峰值进行预测,进而检测隔离开关机械故障。
黄聿琛 +5 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Biomass‐derived quinones are promising green and sustainable cathode materials for sodium‐ion batteries (SIBs), yet their practical application is hindered by poor cycling stability due to dissolution in conventional electrolytes. Herein, we demonstrate that sodiumation is an effective strategy to enhance both rate capability and cycling ...
Xinyue Zhu +4 more
wiley +1 more source
Gaoya dianqi, 2013 发电机断路器电源侧短路电流具有较大的非对称度,在特殊工况下,甚至会出现电流延迟过零的现象。笔者结合实际工程中的发电机参数,计算了考虑电弧前后发电机断路器电源侧短路电流的变化,阐述了电源侧短路电流出现延迟过零的原因,分析了电弧对电源侧预期短路电流的影响。对比发电机断路器电源侧预期短路电流计算结果和系统侧短路电流开断试验数据,分析了发电机断路器电源侧短路电流的开断能力,尤其是具有延迟电流零点短路电流的开断能力,其结果可作为确定发电机断路器电源侧短路电流开断能力的参考依据。
成勇 +5 more
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The Application of PLC in Control System for High Pressure Pulverizer [PDF]
, 2005 【中文文摘】 设计开发了一种基于PLC的高压磨微粉生产线的控制系统,阐述了其工艺流程、控制要求以及控制系统的硬件结构、程序设计。系统具有生产线自动延时顺序启动和停机,状态监测和故障报警,高压磨负荷控制,分级机转速控制等功能。 【英文文摘】Control system based on PLC for high pressure pulverizer product line was designed,its producing flow and control requirements were ...
杨炜, 洪永强, 蒋文芳
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Data-driven Based Fault Prediction of Main Feedwater Pump in Nuclear Power Plant [PDF]
At present, nuclear power plant equipment sensors generate a large amount of monitoring data every day, but the utilization of these data is relatively low.
ZHANG Guohui, LUO Zhiping
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of efficient and stable bifunctional electrocatalysts is a key challenge for the industrialization of hydrogen production by water electrolysis. In this work, Co‐doped NiS/Ni3S2 heterostructured nanowire arrays (Co–NiS/Ni3S2 NA) were successfully constructed by precisely modulating the phase‐selective behavior of nickel ...
Xing‐Hang Liu +2 more
wiley +1 more source
Gaoya dianqi, 2020 配网中大量使用负荷开关进行负载电流及故障电流的开断,由于负荷开关拒分拒合导致配网事故时有发生,文中研究了一种基于电机电流测量的负荷开关状态检测方法。在实验室采用现场常用的交流驱动电机负荷开关,通过对其传动齿轮箱添加沙粒及粘贴胶带等方式,构建了3种不同严重程度的负荷开关机械故障,对电机电流时域及频域信号进行了测量及分析。结果表明随着负荷开关机械故障严重程度增加,电机动作转矩增大,导致电机电流幅值增加、暂态持续时间增加、暂态过度时间减少及信号频域低频分量幅值增加 ...
赵晓晖 +6 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Chemically self‐charging aqueous zinc‐ion batteries (AZIBs) have emerged as promising candidates for energy storage technologies owing to their environmental autonomy and structural simplicity. Nonetheless, the self‐charging performance is significantly compromised by the limited potential difference between cathodes and oxygen, as well as the
Yan Wang +5 more
wiley +1 more source
Gaoya dianqi, 2009 研究了一种高压断路器直线电机操动机构,设计分析了永磁直线直流电机及其运动特性。基于40.5 kV真空断路器机械特性的要求,设计了一台配有制动保持装置的永磁直线直流电机操动机构,利用有限元方法建立了电机的仿真模型,对永磁直线直流电机的基本特性和起动过程进行了特性仿真,得到了电机运行时的电磁推力、电流、速度等曲线并进行了分析,得出了电机操动机构能够提供的机械特性,为真空断路器采用直线电机操动机构提供了依据。
林莘, 李永祥, 徐建源, 吴刚
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