Results 131 to 140 of about 8,021 (169)

Chairside digital design and manufacturing method for children's band and loop space maintainers. [PDF]

open access: yesHua Xi Kou Qiang Yi Xue Za Zhi
Qin Q   +8 more
europepmc   +1 more source

瓷盘型悬式绝缘子串劣化状态自动检测装置研究

open access: yesDianci bileiqi
为提高高压输电线路瓷质绝缘子串劣化或低/零值带电检测的准确性,研制了可用于无人机搭载的自动可变间隙火花放电检测装置。首先结合声-光-电检测实现了绝缘子分布电压的自动和准确测量。其次在实验室搭建了间隙放电试验平台,试验确定了球形间隙放电电压与间隙距离的对应关系,据此整定了可变火花间隙测量装置的间隙距离。最后建立了绝缘子串及检测装置等效模型,利用场路结合法研究了检测装置介入对检测结果的影响。研究结果表明,可变间隙距离的火花放电检测装置对绝缘子串原始电场影响小,高精度检测有助于准确地判断绝缘子片劣化程度 ...
张刚   +5 more
doaj  

[Efficacy analysis of 23 cases of parapharyngeal space tumors removed by oral approach assisted by plasma and high-definition endoscopic system]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Wang X   +7 more
europepmc   +1 more source

Technical guideline for intra-prepontine cisternal drug delivery via spinal puncture through subarachnoid catheterization. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban
Li X   +11 more
europepmc   +1 more source

[Neurofibromatosis type Ⅰwith parapharyngeal space invasion: report of one case]. [PDF]

open access: yesLin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2020
Hu Y   +7 more
europepmc   +1 more source

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