Results 51 to 60 of about 2,028 (103)

工频过电压对压敏电阻影响的实验研究

open access: yesDianci bileiqi, 2012
在低压电力系统中由于工频暂时过电压导致电源型电涌保护器Surge Protective De-vices(SPD)损坏事件时有发生。根据氧化锌压敏电阻的伏安特性,结合双肖特基势垒理论,利用热稳定仪和CJ1001型压敏电阻直流参数仪进行多次实验,通过对实验数据进行对比分析,提出了电源型SPD的工频暂时过电压耐受性不仅与MOV的电压梯度有关,还与低温焊锡连接点位置、通流容量、能量耐受密度等有关;MOV的工频热击穿为瞬态过程。
应达   +4 more
doaj  

直流接地极招弧角熄弧特性研究

open access: yesGaoya dianqi, 2016
从电弧的电位梯度及伏安特性方面总结了开放空间电弧的研究现状,综述了影响电弧特性的主要因素,简要叙述电弧伏安特性作为直流电弧熄弧判据的原理,分析比较了目前直流招弧角间隙熄弧能力工程设计的两种思路,并提出了不同思路所面临的和亟待解决的问题。
张冯硕   +6 more
doaj  

[Evaluation of an interpretable 12-lead ECG automatic diagnosis model based on deep feature fusion]. [PDF]

open access: yesNan Fang Yi Ke Da Xue Xue Bao
Lu X   +5 more
europepmc   +1 more source

[Extracellular matrix materials and tissue regeneration and repair]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhao L, Xie H.
europepmc   +1 more source

[Defect modification of calcium silicate and its application in oral bacteriostasis and tooth remineralization]. [PDF]

open access: yesHua Xi Kou Qiang Yi Xue Za Zhi
Hu Y   +6 more
europepmc   +1 more source

[State-of-the-art in peripheral nerve injury diagnosis and therapy]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Sun J, Chen L.
europepmc   +1 more source

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