Results 41 to 50 of about 1,039,976 (166)
Gaoya dianqi, 2018 快速接地开关作为高压开关电器设备的重要模块,通常采用弹簧操动机构作为其驱动装置,降低机构驱动弹簧操作功,能够有效地减小传动系统所受的冲击载荷,对提高快速接地开关稳定性和可靠性具有重要意义。笔者通过建立快速接地开关三维模型,开展动力学仿真计算,对仿真数据进行分析,发现了驱动弹簧关键参数与快速接地开关合闸速度之间的对应关系,提出了一种驱动弹簧的优化设计方法,并通过样机试验验证了该方法的可行性。试验结果表明,该方法设计的驱动弹簧,既能满足合闸速度要求,又可实现驱动弹簧操作功最小化。
郭良超, 杜迎乾, 雷琴, 宋超
doaj
Journal of Animal Ecology, Volume 95, Issue 7, Page 1178-1193, July 2026.This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
wiley +1 more source
A more‐than‐human political ecology of Indonesian songbird trade
Conservation Biology, Volume 40, Issue 3, June 2026.Abstract Since its inception, conservation science has considered wildlife trade a problem. In focusing on conservation outcomes, conservationists almost completely ignore the welfare of traded animals and plants and the harms they endure. We developed a political ecology approach that incorporates the interconnectedness of people with animals and ...
Sicily Fiennes +9 more
wiley +1 more source
500/220kV同塔四回输电线路接地开关开合感应电压—感应电流能力研究
Gaoya dianqi, 2013 同塔多回输电线路有效解决了电网建设与输电走廊紧缺之间的矛盾,但对接地开关提出了严苛的要求。笔者以500 kV祯宝甲乙线与220 kV东莆甲乙线同塔四回架设为例,对感应电压和感应电流进行了理论分析,采用电磁暂态仿真程序（ATP-EMTP）计算了两种不同运行工况下,停运线路的感应电压和感应电流。发现计算结果超过了标准规定的接地开关能够开合的B类感应电压、电流的要求。依据计算结果对500 kV东莞站采用的220 kV JW6-252/J50型接地开关进行了开合超B类感应电压、电流的试验。在开断电磁感应电压2 ...
李兴旺 +5 more
doaj
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Additive manufacturing, commonly referred to as three‐dimensional (3D) printing, provides the geometric freedom and multi‐material integration needed to build soft medical robots for minimally invasive interventions, prosthetics, and rehabilitation.
Yao Wang +5 more
wiley +1 more source
, 1993 一种多路低热电势转换开关是采用继电器驱动附加触头进行切换，该开关的触头与接头接触面积大，并同时安装一对触头，同时可控制两路电路。该开关的各电路部分的元件都选用无氧铜制成，其导电性能良好，接触电阻小，各部组件组装在油箱中，体积小、重量轻，且信号采集可靠性好，开闭动作灵活。经测试接触电势可小于０．２微伏，热电势漂移可小于０．１微伏／时。该开关可与微相连用实现自动控制系统 ...
尹安学, 孙毅, 王文斌
core
, 2022 通常一种光开关只适用于一个特定的较窄领域。文章提出了一种基于介质上电润湿驱动技术的微流控矩阵光开关，可较广泛地应用于光通信和光电子系统中，并且结构简单、操作方便、偏振无关，易集成大型矩阵开关。文章给出了矩阵光开关的结构和工作原理，并设计了矩阵驱动电路。光开关的工作电压为58 V。研究结果表明：此矩阵光开关从“开”到“关”和从“关”到“开”的响应时间分别为120和100 ms；其插入损耗为0.26 dB，远比一般矩阵光开关低；消光比大，为139.7 dB。此外，文章给出了两种应用方案 ...
罗曜伟 +5 more
core +1 more source
, 2017 本发明提出了将用电设备或者发电机(例如风力发电设备)借助开关设备(106)与馈电线(102)、例如配电网的环状导线连接。为此，开关设备具有晶闸管回路(111)，其与断路开关(109)并联连接并且将开关设备的变压器(113)与馈电线连接。由此可以实现高效的断路开关，其可以依据用电设备和发电机的功率而被确定尺寸。The present invention is proposed and is connected electrical equipment or generator (such as wind ...
Heinz, Michael +2 more
core +1 more source
Gaoya dianqi, 2017 为了解决目前因内部电弧故障影响整套开关柜退出运行的状况,提高供电可靠性,文中设计了一种开关柜内部电弧故障的保护方法。它是利用超快速接地开关快速接地来转移开关柜内部故障电弧电流,同时利用超快速接地开关在300 ms内完成合闸和分闸操作,熄灭电弧并减轻因电弧对柜内绝缘和元件的损坏,这样可以让开关柜母线上的断路器完成重合闸操作,恢复供电。这种设计可以在不改变现有断路器标准操作循环的基础上,极大地提高供电可靠性。
王自立, 李六零
doaj
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Engineering the semiconductor/dielectric interface is crucial for advancing two‐dimensional (2D) nanoelectronics, where device performance is predominantly governed by interfacial defects and dielectric coupling. Optoelectronic doping based on carrier trapping at the h‐BN/SiO2 interface has enabled non‐volatile and reversible carrier ...
Zhe Zhang +6 more
wiley +1 more source