Results 61 to 70 of about 213 (99)

不同中性点接地方式雷击建弧率的研究

open access: yesDianci 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 role of peripheral nerves in wound healing]. [PDF]

open access: yesZhejiang Da Xue Xue Bao Yi Xue Ban
Zhang Z, Ren D, Tang J, Guo S.
europepmc   +1 more source

SF6电弧等离子体平衡成份计算及其光谱特性

open access: yesGaoya dianqi, 1987
本文计算了SF6电弧等离子体的平衡成份,温度范围为5000K—30000K,气压为0.2MPa。考虑到等离子体中的主要组成为SF6、SF4、SF2、S2、F2、S、F、S+、F+、F-、e,在计算过程中仅考虑一次电离。在SF6电弧等离子体平衡成份的计算基础上,本文计算了一些SF6等离子体光谱分析中常选用的几条谱线的线光谱发射系数。
doaj  

[Toxicity of lunar dust simulant exposure via the digestive system: Microbiota dysbiosis and multi-organ injury]. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban
Chen Y   +8 more
europepmc   +1 more source

[Recent progress in the treatment of intractable sialolithiasis]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban, 2023
Liu DG   +9 more
europepmc   +1 more source

[Interpretation of Clinical Practice Specifications for Permanent Tooth Extraction (2023 Edition)]. [PDF]

open access: yesHua Xi Kou Qiang Yi Xue Za Zhi
Chai J   +5 more
europepmc   +1 more source

Electroacupuncture in the treatment of neurogenic urine retention through autophagy mediated by AMPK/mTOR pathway. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban, 2022
Li Z, Zhang R, Zhao G, Kuang Y.
europepmc   +1 more source

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