Results 101 to 110 of about 1,100 (152)

特高压断路器预击穿对合闸空载GIS母线操作过电压的影响

open access: yesGaoya dianqi, 2019
针对近几年国内特高压GIS设备启动调试过程中在断路器合闸冲击空载母线时造成绝缘击穿事件,参考特高压GIS断路器特性,建立电磁暂态仿真模型,研究了断路器预击穿对特高压GIS母线快速暂态过电压的影响,得到以下结论:①在断路器合闸空载GIS母线时,不考虑断路器预击穿,则2%统计过电压为1.58 p.u.,考虑预击穿现象后,其最高可达1.8 p.u.;②根据仿真计算,特高压断路器合闸空载GIS母线暂态过电压的首波上升时间约为0.3μs,小于标准雷电冲击波的上升时间 ...
赵丹丹   +7 more
doaj  

[Application of micro-bolus injection and piezoelectric sensors to improve the safety of radiopharmaceuticals bolus injection]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023
Li J   +7 more
europepmc   +1 more source

TVS管在纳秒级强电磁脉冲下的冲击特性

open access: yesDianci bileiqi
针对防护器件暂态抑制二极管(TVS)在纳秒级强电磁脉冲作用下的特性响应问题。基于TVS管反向击穿理论,采用理论与实验相结合的方法,利用纳秒级强电磁脉冲发生器充当电磁脉冲源,选用1.5KE系列不同型号的TVS管在不同强度的电磁脉冲下进行实验。综合分析得出:随着不同型号器件直流击穿电压升高,器件残压的误差率由4%左右逐渐增加到16%;随着冲击电压的增加,TVS管动作时间逐渐减少,最终会在31 ns左右维持不变;TVS管在冲击电压一定的情况下,随着器件直流击穿电压的增加,TVS更易达到饱和状态 ...
李祥超, 荆浩楠, 赵凯, 郭稳
doaj  

高气压下氮氧混合气体的工频击穿特性

open access: yesGaoya dianqi
文中通过工频击穿实验研究了不同电场均匀度、配比、气压下氮氧混合气体的工频绝缘特性。实验发现:板—板电极下,配比对氮氧混合气体的击穿电压影响较小,氮氧混合气体的击穿电压随充气压力的提高均呈增长趋势;棒—板电极下氮氧混合气体的击穿电压明显降低;针—板电极下氮氧混合气体的击穿电压在0.6~0.9 MPa出现“驼峰”效应,随着针—板电极间距增大,“驼峰”效应越发显著,较高气压下绝缘强度出现饱和。综合分析表明,在不同电场均匀度下,0.8 MPa时80%N2/20%O2与SF6在0.4 MPa时80%的绝缘强度相当。
陈凯   +4 more
doaj  

[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

[Research advances on the mechanism and clinical application of cold atmospheric plasma in promoting wound healing]. [PDF]

open access: yesZhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Zhao ZY, Cai CH, Liu H, Liu SW, Wang XG.
europepmc   +1 more source

[Pneumothorax during pediatric laparoscopic high ligation of hernia sac: A case report]. [PDF]

open access: yesZhong Nan Da Xue Xue Bao Yi Xue Ban
Lin Y   +5 more
europepmc   +1 more source

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