近几年来复合绝缘子缺陷、故障问题频发,其中影响最大的就是复合绝缘子芯棒酥朽断裂问题。为进一步研究串型、温升与绝缘子内部缺陷的关联性,文中以华中地区某两条500 kV架空线路57支发热复合绝缘子为研究对象,开展了实验室红外检测、数字X射线检测(DR检测)、剖检等11项综合性试验。结果表明,该批次复合绝缘子存在严重的护套与芯棒粘接不良家族性缺陷,该缺陷是导致绝缘子异常发热的根本原因。同时紧凑型V串绝缘子受力和高场强影响,缺陷率相对I串较高。此外,通过对比分析多项试验所检出的缺陷情况和缺陷位置 ...
袁一钧 +8 more
doaj
[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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[Gandou Bushen decoction ameliorates ovarian injury in murine hepatolenticular degeneration via the AGE/RAGE/NF-κB signaling pathway]. [PDF]
Jiang P, Wu L, Han H.
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[Comprehensive considerations for the diagnosis, treatment, and management of osteogenesis imperfecta]. [PDF]
Lyu XH, Dong J.
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对某发生故障的110 kV GIS用盆式绝缘子进行全面分析,通过宏观检查、渗透检测、X射线检测、断口宏观分析和断裂面能谱分析等方法,并经过仿真模拟验证,分析判断出盆式绝缘子开裂的原因,是盆式绝缘子在制造过程中存在原始缺陷及微裂纹,在后期安装、使用过程中产生应力集中,最终发生贯穿性开裂,导致漏气。为避免同类型故障的再次发生,提出同批次产品更换检测、严格监造期间盆式绝缘子渗透试验见证等建议,提升盆式绝缘子入网质量,保障电网安全稳定运行。
吕岩婷 +4 more
doaj
[The value of DCE-MRI combined with spectral CT in the short-term efficacy of concurrent chemoradiotherapy for nasopharyngeal carcinoma]. [PDF]
Zheng S +5 more
europepmc +1 more source
[Indicative effect of indocyanine green-near-infrared fluorescence imaging in the thickness of necrotic dermal tissue in porcine burn wounds]. [PDF]
Zhang YS +6 more
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【目的】 初步调查介入放射治疗的患者术中所受X射线辐射的剂量并探讨降低辐射的方法【方法】 采用DSA 机配置的穿透电离室型剂量监测系统(AEP),实时读取记录947名患者在1651例次介入放射操作中的透视时间摄影帧数面积-剂量乘积(DAP)和入射表面剂量(ESD),运用秩和检验关联性分析及线性回归分析等统计学方法分析以上数据,比较分析各种不同类型患者介入操作辐射数据的差异性及相互关系【结果】 患者的透视时间摄影帧数DAPESD的均值分别为(13.5 ± 12.1) min(230 ± 180)帧(194
doaj
[<i>Qingre Lidan Jiedu</i> Recipe improves high copper load-induced cognitive dysfunction in rats by regulating mitophagy]. [PDF]
Wang Y +6 more
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[Comparative study on accuracy of three imaging methods in diagnosis of subacromial impingement syndrome]. [PDF]
Zi L +7 more
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