Results 51 to 60 of about 5,683 (102)

直流接地极对附近输电线路杆塔的腐蚀影响及防护措施的研究

Gaoya dianqi, 2011
直流电流在大地中流散时,大地将呈现一定的电位分布,当直流接地极址靠近输电走廊时,将有直流通过地线在处于不同等电位面的杆塔之间流动,从而造成杆塔接地体及基础导体的腐蚀。笔者针对锦屏-苏南±800 kV特高压直流输电工程送端龙恩接地极址,以距极址最近的二自Ⅱ回500 kV交流线路为例,将直流接地极、土壤结构、避雷线和杆塔接地体在CDEGS（电流分布、电磁场分析、接地与土壤结构分析）软件中进行数值建模,仿真计算了流过各个杆塔的直流电流值并分析了土壤结构、杆塔接地电阻等参数对直流分布的影响 ...
朱轲, 吴驰, 扬威
doaj  

小电阻接地系统单相接地故障地电位分布与人身安全性研究

Dianci bileiqi, 2019
在小电阻接地系统中,若线路发生单相接地故障将在故障点产生较大电流,数百安的接地电流会引起地电位超过安全允许值。对某市10kV小电阻接地系统发生单相接地短路后会造成地点位升高进行了定量分析。首先,对该线路在单相接地短路时故障短路电流进行了模拟理论计算和MATLAB仿真,得到故障发生后将产生超过安全允许的电流值。其次,运用有限元分析软件ANSYS分析了杆塔旁土壤地电位分布,并分析其跨步电压对人身安全的影响。结果表明:故障发生后杆塔附近的跨步电压较大,远远超过人身安全允许值。最后,基于人身安全 ...
毛兴华, 马亚琦, 潘子仁, 唐锐, 林俊超   +4 more
doaj  

[Exploration and application of nanotechnology in precision transarterial chemoembolization for hepatocellular carcinoma]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Kong JQ, Li R, Zuo RN, Zhang X, Ding ZH, Dai Y.   +5 more
europepmc   +1 more source

[Comparative analysis of microbial communities in different oral ecological niches of preschool children]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Liu J, Sun Y, Wu J, Tang S, Ding G.
europepmc   +1 more source

[Localizing target for transcranial electrical stimulation in epilepsy patients combining scalp electroencephalogram and neural computational model]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liu Y, Li C, Han Y.
europepmc   +1 more source

[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

[Development of a surface electromyography index system for orofacial muscles and validation of a discriminant model in unilateral molar occlusal interference]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li W, Shen Y, Yang Y, Shan S, Gao Z, Wen A, Shang X, Tian Y, Guo S, Wang Y, Wang Y, Zhao Y.   +11 more
europepmc   +1 more source

[Development of a machine learning-based ionization efficiency prediction model for per- and polyfluoroalkyl substances and its application in semi-quantitative analysis]. [PDF]

Se Pu
Sun SZ, Li YY, Gao Y, Li KC, Chen Z, Li XQ, Zhang QH.   +6 more
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

[Progresses on temporal interference electromagnetic stimulation for non-invasive deep brain function modulation]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Zhou T, Yu P, Xu Y.
europepmc   +1 more source