Gaoya dianqi, 2009 介绍了几种GIS局部放电常用的检测技术,并应用常规脉冲电流检测法和超声波检测法对模拟的GIS运行中常见的几种典型缺陷,包括带电导体上尖端、壳体内壁上尖端、自由金属颗粒、悬浮电位、绝缘子内气泡以及黏附在绝缘子表面的金属颗粒等进行了检测。再通过对测试系统记录的放电脉冲和超声波脉冲的相位分布比较、不同缺陷在一定电压下的脉冲放电量大小比较,以及不同缺陷超声波脉冲有效值和周期峰值的特征和大小比较,总结得到在上述各种典型绝缘缺陷情况下,应用这两种检测方法所得波形和信号的主要特征 ...
李德军, 沈威, 郭志强
doaj
[Structural changes of the frontal cortex in depressed mice are associated with decreased expression of brain-derived neurotrophic factor]. [PDF]
Nan Fang Yi Ke Da Xue Xue Bao, 2023 Cui W +7 more
europepmc +1 more source
[The guideline for the diagnosis and treatment of marginal zone lymphoma in China (2025)]. [PDF]
Zhonghua Xue Ye Xue Za ZhiHematological Oncology Committee of China Anti-Cancer Association +5 more
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[Enteral nutrition support for lysinuric protein intolerance: a case report and literature review]. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2023 Quan J, Liu XF, Hu K, Hou Q.
europepmc +1 more source
一起500 kV线路多支复合绝缘子芯棒酥朽发热特征及缺陷起始原因分析
Dianci bileiqi针对一起500 kV同塔双回线路多支复合绝缘子发热事件，开展了现场不同角度的无人机红外测试，对酥朽缺陷绝缘子的温差、发热区段数量及长度进行了分析，并对更换后的发热绝缘子开展外观检查、红外复测、剖检及工业CT、带护套水扩散试验，对比了实验室与现场红外测试差异，通过剖检对比了芯棒酥朽区段与发热位置的关系，并对酥朽原因进行了讨论。结果表明，现场38支酥朽复合绝缘子，94%的绝缘子为1处或2处芯棒发热、6%出现3处发热，79%的绝缘子发热区段长度最长为1至2个伞裙单元、21%存在3-5个伞裙单元的连续发热 ...
李特 +5 more
doaj
[Determination of 17 bisphenol compounds in human urine by solid supported liquid-liquid extraction-ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuJin Y +6 more
europepmc +1 more source
Gaoya dianqi气体绝缘金属封闭开关设备（GIS）绝缘件内部缺陷引起的放电击穿故障会造成设备非计划停运，且GIS设备故障检修周期长、影响范围大，严重威胁设备和电网的运行安全。目前，对于GIS设备绝缘件应力集中、弱电场区域微小气隙等部分潜伏缺陷，现有试验方法检测有效性受限，其长期运行中的缺陷劣化规律尚不清晰，制约了GIS绝缘件质量提升。文中基于一起GIS隔离开关绝缘子局放缺陷，提出了GIS设备绝缘件的温度、机械—电场同步老化、强电场老化试验方法，探索内部缺陷发展规律。首先将绝缘子装入GIS隔离开关样机 ...
李健俊 +9 more
doaj
[Depressive disorders and olfactory dysfunction]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanTang Y, Zou L, Chen X, Yan C.
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[A rare case of neonatal-onset hepatic sinusoidal obstruction syndrome]. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2023 Wang ZM +8 more
europepmc +1 more source
Screening and follow-up results of neonate medium-chain acyl-CoA dehydrogenase deficiency in Zibo, Shandong province. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue Ban, 2022 Dong L, Ji C, Xu J, Cui Y.
europepmc +1 more source