Results 31 to 40 of about 508,014 (156)
Gaoya dianqi, 2014 直流输电工程与交流输变电工程不同,直流设备周围的电场为直流静电场和空间离子流场的综合场。但是,目前,国内直流输电工程的检修作业人员安全防护基本参照同等电压等级的交流输变电工程进行。当现场使用大型机具进行带电施工和检修时,由于机具的进入,作业现场的直流综合场和空间离子流分布会影响检修作业人员的安全防护效果。因此,笔者针对直流换流站的现场实际布置情况,对换流站典型施工区域有/无机具条件下的直流合成电场和离子流密度进行了测试。测试结果表明,有大型机具存在时,由于机具本体的屏蔽作用 ...
蔡焕青 +7 more
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT High‐yield photocatalytic H2O2 production in sacrificial agent‐free pure water constitutes a critical bottleneck requiring urgent advances in energy catalysis. Although ZnIn2S4 (ZIS) exhibits favourable visible light absorption, it is plagued by severe bulk charge carrier recombination and scarce accessible surface‐active sites.
Sheng Liu +7 more
wiley +1 more source
Gaoya dianqi, 2018 对直流输电的机电暂态仿真模型进行了深入研究。推导了适用于整流侧和逆变侧的换流器通用数学模型,分析了换相失败的判断方法,同时对逆变侧定关断角控制器的模拟方法进行了详细分析。在机电暂态仿真软件中搭建了含有直流输电详细模型的测试系统。为了深入分析直流输电机电暂态模型的精确度,以直流输电逆变侧不同程度的故障对比了机电暂态仿真结果与电磁暂态仿真结果。结果表明:机电暂态仿真计算是理想化的,它对换相失败临界点的判断与电磁暂态仿真存在偏差;在发生换相失败故障时,机电暂态模型响应曲线与电磁暂态模型基本一致 ...
李威 +8 more
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Electrochemical carbon dioxide reduction reaction (CO2RR) powered by renewable electricity offers a sustainable route for producing value‐added carbonaceous chemicals. Herein, a three‐membrane electrolyzer was employed to directly co‐generate carbon monoxide (CO), chlorine (Cl2), and potassium carbonate (K2CO3) from the electrolysis of CO2 and
Shuai Wu +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT NiCoCrAlYTa coatings are widely used as bond coats in thermal barrier coating (TBC) systems for gas turbines and aeroengines to provide oxidation resistance and support the formation of a protective thermally grown oxide (TGO). Herein, high‐current pulsed electron beam (HCPEB) modification was utilized to strengthen a NiCoCrAlYTa coating by ...
Xiangcheng Li +6 more
wiley +1 more source
, 2014 本实用新型提出一种三相永磁同步电机驱动电路，包括实现位置环和速度环的控制算法的数字电路和实现电流闭环及PWM信号产生的模拟电路；数字电路包括FPGA、DSP、DAC；模拟电路包括2/3变换电路、电流环调节电路、三角波发生器、比较器、电流检测电路以及三相桥驱动电路；所述FPGA、DSP、DAC依次连接；2/3变换电路与DAC连接，电流环调节电路与2/3变换电路连接，电流环调节电路分别连接比较器、电流检测电路；三相桥驱动电路设置在比较器和电流检测电路之间；三角波发生器与比较器连接 ...
王海涛, 郭云增, 郭敏, 刘锋
core
Metal‐Filamentary Memristor‐Based Artificial Neurons for Embodied Neuromorphic Intelligence
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Embodied neuromorphic intelligence represents a transformative paradigm for next‐generation intelligent systems, with broad implications for robotics, autonomous driving, intelligent manufacturing, and smart infrastructures. Neuromorphic chips enable bioinspired computing with sparse, heterogeneous representations and spatiotemporal dynamics ...
Tianci Huang, Zuqing Yuan, Qilin Hua
wiley +1 more source
, 2013 本发明提出一种三相永磁同步电机驱动电路，包括实现位置环和速度环的控制算法的数字电路和实现电流闭环及PWM信号产生的模拟电路；数字电路包括FPGA、DSP、DAC；模拟电路包括2/3变换电路、电流环调节电路、三角波发生器、比较器、电流检测电路以及三相桥驱动电路；所述FPGA、DSP、DAC依次连接；2/3变换电路与DAC连接，电流环调节电路与2/3变换电路连接，电流环调节电路分别连接比较器、电流检测电路；三相桥驱动电路设置在比较器和电流检测电路之间；三角波发生器与比较器连接 ...
王海涛, 郭云增, 郭敏, 刘锋
core
, 2020 U形无铁心结构的直线发电机具有惯性小、起动推力小等优点,应用于波浪能发电领域,可以在较小的波浪下起动发电。从发电机角度对该结构的电机磁场进行了建模分析,并建立解析模型和有限元模型。利用诺伊曼边界条件将该模型简化为最小周期,同时针对直线发电机往复运动的特殊模式,提出了一种时步求解过程中的坐标系映射变换方法,将一个恒速周期内的电压或电流波形变换为变速运行状态下的波形。通过对比该模型在解析、有限元方法和实验结果,得出该简化模型有效 ...
邱书恒 +4 more
core
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Tin‐based composite oxides typically undergo severe volume variations and exhibit poor intrinsic conductivities despite their high theoretical capacity as promising anode candidates for sodium‐ion batteries. This results in rapid structural degradation and capacity fading upon cycling.
Yongmei Sun +5 more
wiley +1 more source