Results 71 to 80 of about 853 (100)

[Identification and Underlying Mechanisms of Immune Cell- and Senescence-Related Biomarkers in Atrial Fibrillation]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Huang W, Liu E, Fu H.
europepmc   +1 more source

[Development of on-line lateral stiffness measurement system for anterior cruciate ligament and its influence on anterior cruciate ligament reconstruction]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2021
Cui Z, Chen Z, Huang S, Yang H, Lei J, Zhu D.   +5 more
europepmc   +1 more source

[An investigation study on the technology and training level of ski patrol]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Bai P, Huai W, Yang Z, Zhou F, Guo X, Chen Z, Guan H, Bai J.   +7 more
europepmc   +1 more source

[Research progress on treatment of unstable intertrochanteric fractures in elderly patients with bone cement type femoral head replacement]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang S, Ma J, Lu B, Ma X.
europepmc   +1 more source

[Sensing volume of tissue dielectric property measurement with open-ended coaxial probe]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao, 2020
Liu Y, Huang Y, Xin X, Yu X.
europepmc   +1 more source

10 kV一母多馈电缆线路过电压传递影响因素分析

Dianci bileiqi
10 kV电缆发生故障时，弧光接地会产生过电压，造成电网波动，影响供电安全。利用PSCAD建立一母多馈线模型，详细分析了不同条件下馈线条数、中性点接地电阻阻值和电缆长度对电缆中过电压传递特性的影响。结果表明：电缆馈线增加时，发生弧光接地故障，由行波传递分流作用使传递到非故障电缆馈线过电压幅值降低；小电阻接地故障相将产生较高过电压，过电压传递到非故障馈线上时幅值仍较大，给非故障电缆绝缘产生危害；中性点接地电阻增加时，非故障馈线故障相电压幅值降低，非故障相电压故障升高；故障电缆的长度增加 ...
曹京荥, 陈杰, 谭笑, 李陈莹, 胡丽斌, 方春华, 陶玉宁, 游海鑫   +7 more
doaj  

工频叠加操作冲击电压下预制式电缆终端破坏机理研究

Dianci bileiqi
工频叠加操作冲击电压是电缆运行中时常面临的情况，在该情况下高频谐波电压会使电缆终端材料介电常数发生变化，进而造成电缆终端所承受的电应力、热应力和机械应力发生改变，最终会对电缆终端的绝缘造成破坏。文中，首先建立了工频叠加操作冲击电压的数学模型，同时分析了不同冲击电压叠加相位对叠加后电压波形的影响；其次，利用有限元软件建立了35 kV预制式电缆终端的仿真模型，对仿真模型参数设置、边界条件设置以及网格剖分设置进行了详细说明；最后，仿真计算了工频叠加操作冲击电压下电缆终端应力情况，包含电应力 ...
马波, 常彬, 张锐, 谢书凝, 张周胜   +4 more
doaj  

A text mining-based approach for comprehensive understanding of Chinese railway operational equipment failure reports. [PDF]

Sci Rep
Yang X, Li H, Xu Y, Shen N, He R.
europepmc   +1 more source

[Determination of polychlorinated naphthalenes in ambient air by isotope dilution gas chromatography-triple quadrupole mass spectrometry]. [PDF]

Se Pu, 2022
Liu H, Jin J, Guo C, Chen J, Hu C.
europepmc   +1 more source

[Preliminary application of domestic single-port serpentine arm robotic surgical system in children's pyeloplasty]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li Z, Huang Y, Li N, Li M, Song H, Zhang W, Liu C.   +6 more
europepmc   +1 more source