Results 61 to 70 of about 102 (96)

550kV罐式断路器局部放电在线检测

Gaoya dianqi, 2008
局部放电信号反映了断路器内部绝缘缺陷。为监测局部放电信号,笔者采用了超声法和超高频法对断路器进行试验,两种方法均检测到在线断路器内部的局部放电信号。由于超声波和电磁波特性上的差异,超声法能进行放电点的定位;超高频法能发现初期缺陷的低能放电,且抗干扰能力强。
胡涛, 刘海峰, 杜大全
doaj  

诊断接触不良的新设备

Gaoya dianqi, 1990
金属封团式SF6组合电器（GIS）的断路器、隔离开关、母线的连接部分,都在密封的罐体中。由于在运行过程中的振动以及接触面被膜等影响下出现接触不良,往往酝酿成温度升高而引起绝缘破坏事故。目前,因为接触不良,已成了GIS经常发生事故的原因之一。为了对接触部位进行诊断,过去用测量接触电阻、温度上升情况等办法,但是,前者正在运行过程中不能测量,后者在影响速度及定量方面也不尽完善。 如果发生接触不良,一般的发展过程是这样的:处于正常运行状态的设备,由于受到地震,机械振动等外部力的影响,在接触表面形成隔膜 ...
尹新芳
doaj  

[Emergency plan for inter-hospital transfer of newborns with SARS-CoV-2 infection]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi, 2020
Chen Z, DU LZ, Fu JF, Shu Q, Chen ZM, Shi LP, Wang W, Chen SH, Ma XL, Ye S, Sun W, Chen MY, Zhu HH, Huang GL, Luo FX.   +14 more
europepmc   +1 more source

[Rapid identification of Ralstonia pickettii using PCR-nucleic acid test strips]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao, 2022
Wang D, Zhao X, Jiang F, Sun L, Xu M, Su J, Zhao Y.   +6 more
europepmc   +1 more source

[Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry]. [PDF]

Se Pu
Li YJ.
europepmc   +1 more source

[Application of V-shaped stealth decompression technique using ultrasonic bone scalpel in anterior surgery for adjacent two-level cervical spondylosis]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wang Z, Duan K, Liu Y, Xu C, Zhu Z, Zhou P, Guan J.   +6 more
europepmc   +1 more source

[Effect of intraoperative blood salvage autotransfusion on the prognosis of patients after carotid body tumor resection]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li W, Li J, Zhang X, Li W, Li Q, Zhang X.   +5 more
europepmc   +1 more source

[Clinical strategies to prevent falls]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2021
Sun Q, Zhang Q, Peng X, Chen Y, Sun H.
europepmc   +1 more source

[Activation of astrocytes in the dorsomedial hypothalamus accelerates sevoflurane anesthesia emergence in mice]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Guo S, Cao F, Guo Y, Li Y, Hao X, Zhang Z, Zhou Z, Tong L, Cao J.   +8 more
europepmc   +1 more source

[Knockout notch1 gene can enhanced radiosensitivity of nasopharyngeal carcinoma cells]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2020
Shen LJ, Huang ML, Li XP, Wu LZ, Tao ZZ, Chen SM.   +5 more
europepmc   +1 more source