提出了中性点绝缘网路一相长时间接地时线路和变电站的过电压保护装置的建议。避雷器接在被保护相与地之间,由两部分串连而成。接地的一部分阀片在正常时通过一个专用继电器触头短接。在一相接地时,健全相电压升高31/2倍,继电器触头跳开 ...
doaj
作者对[文3]与[文4]中关于接触压力与温升的公式提出质疑,并根据[文5]、[文6]中的两个电接触基本公式,导出了一个关于接触压力与温升关系的新公式,提供大家研讨。
王白眉
doaj
[State-of-the-art in peripheral nerve injury diagnosis and therapy]. [PDF]
Sun J, Chen L.
europepmc +1 more source
[Management of accidental tooth root displacement into the mandibular canal during tooth extraction]. [PDF]
Su L, Zhao J.
europepmc +1 more source
[A signal sensing system for monitoring the movement of human respiratory muscle based on the thin-film varistor]. [PDF]
Yuan Y, Zhang Z, Xie L, Huang H, Liu W.
europepmc +1 more source
直流接触器是实现分断、功率切换以及故障保护等功能的关键器件。文中以某直流接触器为例,建立了直流接触器氢气电弧特性仿真的二维磁流体动力学模型,该模型综合考虑了外部负载电路、触头运动以及非均匀外部磁场等因素对接触器电弧特性的影响,仿真研究了不同磁钢厚度下密闭式直流接触器内电弧开断过程中的电流电压变化曲线以及温度场分布。研究结果表明,在不同磁钢厚度的非均匀磁场作用下,450 V/400 A、充气压力为4 atm(1 atm=101 kPa)的直流接触器内部电弧的燃弧时间有所不同,并且随着磁钢厚度增大 ...
黄一凡, 王立军, 王凯, 张润铭
doaj
[Progress on ultrasound-responsive piezoelectric drug delivery system for treatment of neurodegenerative diseases]. [PDF]
Ma R, Chen Y.
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[Construction and practice of the "Construction Supports Competitions-Competitions Nurture Teaching-Teaching Promotes Learning" closed-loop innovative teaching mode: a case study of micro-plasma emission spectrometer setup and trace element analysis experiment]. [PDF]
Xue WY +8 more
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[Research advances on the mechanism and clinical application of cold atmospheric plasma in promoting wound healing]. [PDF]
Zhao ZY, Cai CH, Liu H, Liu SW, Wang XG.
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[Study on the electric field transmission characteristics of conducted-electrode tumor treating fields]. [PDF]
Liu K, Zhang J, Shi J, Fang H, Li X.
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