Results 121 to 130 of about 15,529 (196)

[Establish Standardized Pathological and Genetic Examinations to Reduce the Incidence of Stillbirth]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Zhou F, Yu H, Wang W, Wan L, Wang X.
europepmc   +1 more source

基于能量与相关性的谐振接地系统选线新方法

, 2016
杨新伟, 刘伟娜, 江博
openalex   +2 more sources

[Trends, predictions, and etiological characteristics of the incidence and mortality of lower respiratory infections among children under 14 years in China from 1990 to 2021]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Liao Y, Lin YY, Li YY, Yang JH.
europepmc   +1 more source

直流系统单点接地故障快速定位方法研究

超 孙
openalex   +1 more source

[Current status and prospects of family financial toxicity in childhood malignancies]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wu ST, Wang CL, Shi DR.
europepmc   +1 more source

老旧建筑防雷接地系统改造项目管理难点与对策

包　健
openalex   +2 more sources

[Robotic gastrectomy: Research progress and practical challenges]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li B, Liang H.
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

建筑电气低压配电设计中各种接地系统

, 2023
常坡辉
openalex   +2 more sources

接地故障下特高压直流换流站过电压特性及影响因素研究

Gaoya dianqi
直流系统发生接地故障时会在换流站内一些设备上引起过电压，由于运行方式与设备类型的不同，与交流系统内过电压有很大差异。文中基于上海庙—临沂±800 kV特高压直流输电工程，研究了直流极线接地、直流母线接地与换流变阀侧接地故障工况下换流站内不同位置的过电压特性，分析了平波电抗器、滤波电容器与接地极线参数对过电压特性的影响，研究结论对受端分层接入的直流系统换流站内过电压抑制和绝缘配合具有参考价值。
张宗扬, 康超, 王致远, 余芳, 马子鑫, 郭洁   +5 more
doaj