Gaoya dianqi断路器的合闸电阻能够有效抑制合闸涌流以及操作过电压，对电网的稳定运行起着重要作用，合闸电阻一旦出现故障，无法正确投入或退出，将会造成巨大的设备和安全事故。由于1 100 kV GIS断路器为多断口结构，断口间的配合时序偏差以及各触头弹跳因素的干扰，经常导致合闸电阻特性无法测量，或者测试结果误差较大。针对一起1 100 kV GIS断路器合闸电阻预投入时间及阻值无法检测事件展开研究，分析其结构与测试原理，通过提高测试频率获取完整测试波形 ...
褚周健 +6 more
doaj
[Research progress in diagnosis and treatment of non-tumorous salivary gland diseases]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanCong X, Su J, Wu L, Ding C, Li W, Yu G.
europepmc +1 more source
[The Impact of Oral Microecology on the Development of Inflammatory Bowel Disease]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanWan K, Yang C, Chen N, Chen F.
europepmc +1 more source
高压侧同期方式抽水蓄能电站抽水停机工况下断路器操作的电磁暂态分析
Gaoya dianqi高压侧同期方式抽水蓄能电站断路器操作频繁，同期解列尤其是抽水停机时，切断一定的感性负荷电流，易对断路器绝缘性能产生影响，威胁电站安全运行。基于某高压侧同期方式抽水蓄能电站发生的断路器击穿事故，分析断路器绝缘受损的机理。采用ATP-EMTP电磁暂态仿真软件，对发电机抽水工况下断路器开断时的暂态过程进行仿真，分析断路器不同开断时刻电弧重燃及断口过电压情况，断路器发生多次重燃对断口绝缘产生危害。提高断路器开断速度可以降低重燃次数，但不能有效改善断路器重燃时冲击电流过大的问题 ...
崔涵 +6 more
doaj
[Management of accidental tooth root displacement into the mandibular canal during tooth extraction]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiSu L, Zhao J.
europepmc +1 more source
[Effectiveness analysis of tibial nerve transection with epineurial suture and division of common plantar digital nerve branches in treatment of congenital macrodactyly in children]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiLi D +6 more
europepmc +1 more source
[Applications and perspectives of artificial intelligence in periodontology]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiLü C, Ge S.
europepmc +1 more source
[Indolent γδT-cell clone in Felty syndrome: a case report and literature review]. [PDF]
Zhonghua Xue Ye Xue Za ZhiWang C, Fu MW, An G, Huang WY, Yang LJ.
europepmc +1 more source
[Artificial intelligence in stomatology: Innovations in clinical practice, research, education, and healthcare management]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanDeng X, Xu M, DU C.
europepmc +1 more source