Results 61 to 70 of about 2,340 (103)

基于薄壳理论的针刺式接地装置优化设计研究

open access: yesDianci bileiqi
接地装置的冲击接地电阻对线路的耐雷水平有很大的影响,因此,对接地设备进行基于降阻效果的优化设计是非常有必要的。研究发现在接地极上加装针刺状导体能够改善接地装置冲击特性,文中基于薄壳理论建立了考虑土壤火花击穿特性的接地装置冲击特性有限元模型,然后分析了在水平接地体上添加针刺的降阻机理,最后采用仿真软件研究了针刺导体的位置、间距和角度对冲击接地电阻的影响。研究结果表明:针刺导体的位置、间距、角度与冲击接地电阻之间的关系并非线性,而是存在最优值。在水平接地体长度为15 m、针刺长度为1 m的情况下 ...
李景丽   +3 more
doaj  

[Comparative study on accuracy of three imaging methods in diagnosis of subacromial impingement syndrome]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zi L   +7 more
europepmc   +1 more source

[Early effectiveness of total talar replacement with three-dimensional-printed talus prostheses in steroid-induced talar avascular necrosis]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Cao B   +11 more
europepmc   +1 more source

[Clinical characteristics and prognosis of primary immune thrombocytopenia complicated with diffuse alveolar hemorrhage]. [PDF]

open access: yesZhonghua Xue Ye Xue Za Zhi
An ZY   +8 more
europepmc   +1 more source

[Systemic lupus erythematosus complicated by autoimmune nodopathy: A case report]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Wei C, Yang Y, Zhao X, Liu X, Jia Y.
europepmc   +1 more source

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