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发变电站接地系统的季节系数分析

Gaoya dianqi, 2003
季节因素将影响接地系统的安全性能。季节系数随冰冻季节形成的地表高阻层的电阻率及其厚度的增加而增加。在我国北方高寒冰冻地区接地系统的接地电阻季节系数可达3.0,接触电压和跨步电压季节系数可能达到10和5.4。在雨季形成的地表低胆层也有可能导致接触电压的升高。采用垂直接地极能减小接地系统的季节系数,起稳定接地系统安全性能的作用。
何金良, 沈亚东, 孙为民, 曾嵘, 高延庆   +4 more
doaj  

不同中性点接地方式雷击建弧率的研究

Dianci bileiqi
配电网线路繁多，覆盖范围广，易遭受雷电袭击，破坏力度大。通过建弧机理和熄弧特性分析，中性点不接地方式虽不易建弧，一旦建弧难于熄灭，当系统电容电流较大时仍会有较高的建弧率。消弧线圈接地方式下若补偿度不足或者较高时，会加大接地电弧重燃概率。小电阻接地方式下虽可防护弧光接地过电压，但无法识别故障性质，无法处理高阻接地故障。因此可根据配电网不同的线路结构优化中性点接地方式以降低雷击建弧率。不接地方式仅适用于电容电流小于10 A的以架空裸导线为主的配电网 ...
郝树青, 何肖蒙, 张洋, 李华鹏
doaj  

[Research progress on the acquisition technology of magnetocardiography]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Kang B, Dong M, Chang Y, Wang J, Zhao T, Fan L.   +5 more
europepmc   +1 more source

[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

[Electric-field modeling, simulation, and experimental analysis of multi-target temporal interference transcranial alternating current stimulation]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Wang T, Cui C, Wei Y, Ji X, Xu G.
europepmc   +1 more source

[Gait event-driven dynamic changes in brain-muscle networks and neuromuscular coordination mechanisms]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Liu X, Guo A, Liang T, Liu X, Qin L.
europepmc   +1 more source

[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

[Electroacupuncture at Baihui and Zusanli improves fear memory extinction in single prolonged stress mice by activating hippocampal astrocytes]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Chen X, Liu C, Yang S, Wang J, Cheng P, Yin H, Wang J, Zhu G.   +7 more
europepmc   +1 more source

[Different Astragalus medicinal pairs improve diabetic nephropathy in mice by regulating lipid peroxidation through PTGS2]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Chen X, Jing Y, Liang H, Zhong J, Chen Z, Peng Y, Dai J, Xiao Y.   +7 more
europepmc   +1 more source

[Glutamine-induced autophagy exacerbates muscle atrophy in cachectic nude mice: a multi-omics analysis]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Li Z, Su X, Tian Z, Chao X, Wang Y, Ma D.   +5 more
europepmc   +1 more source