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GIS设备机械缺陷振动信号特征分析技术研究

Gaoya dianqi
机械性振动缺陷的检测是保证GIS设备安全运行的有效手段之一，尚缺乏针对GIS设备内部多种构件机械缺陷振动规律的系统性研究。文中研发了一套GIS设备振动状态高灵敏检测装置，搭建了高电压大电流GIS设备机械缺陷模拟平台，模拟出5种典型缺陷，开展了GIS设备振动信号特性试验研究。试验结果表明，在负载电流不变的情况下，电压的改变对振动信号基本没有变化；在同一电压作用下，振动信号波形保持基本不变，振动信号幅值随着负载电流增加而增加；机械缺陷情况下，振动信号主要频谱为100 Hz，并叠加了较多的高频成分 ...
蒋西平, 李永福, 龙英凯, 王旭鹏, 汪泽州   +4 more
doaj  

[How I treat lymphomas associated with HIV infection]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Liu Y, Wang CY.
europepmc   +1 more source

[Other iatrogenic immunodeficiency associated lymphoproliferative diseases in children with lymphoma: a case report and literature review]. [PDF]

Zhonghua Xue Ye Xue Za Zhi, 2023
Gao HX, Duan YL, Zhou CJ, Zhang NN, Jin L, Yang J, Huang S, Zhang M, Zhang YH.   +8 more
europepmc   +1 more source

[Issues of auditory implant in children with cochlear nerve deficiency]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Zhang Z, Chen J.
europepmc   +1 more source

[Analysis of the serum bile acid profile to facilitate diagnosis and differential diagnosis of NA(+)-taurocholate cotransporting polypeptide deficiency]. [PDF]

Zhonghua Gan Zang Bing Za Zhi, 2023
Deng M, Liu R, Deng LJ, Chen R, Cai ME, Lin GZ, Qiu JW, Song YZ.   +7 more
europepmc   +1 more source

高压电缆缓冲层白斑缺陷引发放电的机理研究

Gaoya dianqi
缓冲层缺陷会为电缆线路的运行带来隐患，由其造成的电缆击穿事故严重危害电力系统的安全稳定运行。为研究缓冲层白斑引发放电的缺陷机理，开展人工模拟缓冲层白斑缺陷实验，测量含有白斑缺陷的电缆缓冲层间电阻，研究白斑对缓冲层电气连接的影响，建立考虑白斑缺陷的电缆等值电路模型，仿真计算缺陷情况下缓冲层的电位变化，并搭建了缓冲层放电模拟实验平台，对放电信号进行检测。研究结果表明：电缆各个铝护套波谷处含有白斑缺陷后缓冲层间电阻可增大10倍以上，严重破坏了缓冲层的电气连接作用，导致缓冲层电位提升 ...
胡丽斌, 陈杰, 赖庆波, 李文杰, 刘顺满, 刘建军, 柏仓, 刘刚   +7 more
doaj  

[Burden of congenital birth defects in children under five in China from 1990 to 2021 and prediction of future trend]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Huang BY, Zhao Q, Peng DL, Wang MY, Zhao QW.   +4 more
europepmc   +1 more source

Value and influencing factors of preoperative MRI evaluation for previous cesarean scar defect associated abnormal uterine bleeding in patients undergoing laparoscopic surgery. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2023
Zhang Q, Lin C, Wu J, Xu D, Zhu S, Jiang B.   +5 more
europepmc   +1 more source

[The microbiota-gut-brain axis in childhood attention-deficit/hyperactivity disorder: mechanisms and therapeutic advances]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Yuan YL, Lan YM, Guo LM.
europepmc   +1 more source

[Neuropsychological development of human immunodeficiency virus-exposed uninfected infants/young children]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi, 2022
Xia W, Zheng JR, Zheng M, Li WJ, Jiang CQ, Wu YT, Huang ZR, Guo GP.   +7 more
europepmc   +1 more source