Results 101 to 110 of about 3,998 (153)

高压线路中短路电流零点延迟条件的讨论

Gaoya dianqi, 2007
高压输电线路中短路电流零点延迟会对高压断路器的开断造成影响。通过简化电路的仿真计算,得出在高压输电线路中短路电流延迟零点的条件,其中包括电网条件和短路条件,并分析在高压线路中具有这些条件的现实性。分析结果验证了该现象存在的现实性,但概率很小。
钱家骊
doaj  

基于双端量的半波长交流输电线路故障选相方法

Gaoya dianqi, 2018
半波长交流输电线路电压等级高,故障后需要选相跳闸。但是半波长输电线路独特的电气特征使得传统的故障选相方法不再适用。文中提出了一种基于双端电气量的半波长交流输电线路故障选相方法。将两端相间电压、相间电流进行组合变换,换算到短路点正负序短路电流,从而判断故障相。基于电磁暂态仿真软件PSCAD搭建特高压半波长输电线路仿真模型。仿真结果表明,该故障选相方法不受故障位置、过渡电阻、弱馈等因素的影响,在半波长交流输电线路发生短路故障时,能快速正确地实现故障选相。
陆金凤, 赵青春, 谢华, 朱晓彤
doaj  

[Impact of surgeon's dominant hand-side consistency with surgical approach on operational efficiency of unilateral biportal endoscopic lumbar discectomy: a prospective cohort study]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Li W, Gao M, Zhang L, Yu Q, Chen X.
europepmc   +1 more source

双断口快速真空开关分闸速度对短路电流短燃弧时间开断特性影响

Gaoya dianqi
短路电流相控快速开断技术可以有效缩短开断的燃弧时间从而提升真空断路器的性能，文中通过研究分闸速度对双断口快速真空断路器短路电流开断短燃弧时间的影响规律，为双断口快速真空断路器相控短燃弧开断提供理论依据。文中实验采用2台12 kV快速真空断路器以及驱动控制系统，搭建了快速真空断路器短路电流短燃弧开断合成实验回路系统，得到了双断口短燃弧时间及临界熄弧开距与分闸速度关系曲线。实验结果表明，双断口短路电流开断短燃弧时间和临界熄弧开距随分闸速度的增加而单调下降。
李秀广, 逯梓来, 姚晓飞, 韩四满, 周秀, 郑凯旋, 管臣, 郑嘉铭   +7 more
doaj  

[Master manipulator of vascular intervention surgical robot based on haptic feedback]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Han G, Sun Z, Tang X.
europepmc   +1 more source

[Rehabilitation guidelines and specifications for traumatic spinal cord injury (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Professional Committee Of Spine And Spinal Cord Injury Rehabilitation China Association Of Rehabilitation Of Disabled Persons, Professional Committee Of Spine Chinese Association Of Rehabilitation Medicine, The Second Medical-Rehabilitation Integration Working Committee Chinese Association Of Rehabilitation Medicine, Spine And Spinal Cord Injury Repair Study Group The Third Professional Committee Of Neurorestoratology Chinese Medical Doctor Association.   +3 more
europepmc   +1 more source

[Performance evaluation of different filtration fractions during daytime continuous renal replacement therapy]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Wang L, Chen Y, Xu G, Xu C.
europepmc   +1 more source

[Progress in electric field assisted molecular imprinting technology]. [PDF]

Se Pu
Wu JY, Huang XJ.
europepmc   +1 more source

[Development and electrophysiological validation of a temporal interference transcranial magnetic stimulation system for mice]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Cui C, Wang T, Zhang Y, Zheng W, Xu G.
europepmc   +1 more source

[Electrical stimulation based on triboelectric nanogenerator promotes osteogenesis of MC3T3-E1 cells on titanium surfaces]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Pang B, Yang S, Han H, Zhang X, Song T.
europepmc   +1 more source