Results 61 to 70 of about 6,673 (112)

绝缘子串的电压分布的分析计算

Gaoya dianqi, 1965
随着电力系统的容量日益扩大,输电电压日益提高,所需绝缘子电压等级也随之提高。但目前单个电瓷绝缘子电压一般都在110千伏以下(指棒式、盘形及针式绝缘子),更高电压等级如330千伏、500千伏及以上就需由多个缘绝子串联组成悬式绝缘子链或支持绝缘子柱。由于绝缘子链(或柱 ...
doaj  

[Analysis of associated factors for the ectopic eruption of adjacent first permanent molars after stainless steel crown restoration of second primary molars]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Dai W, Huang S, Zhang Z, Sun X, Zhang F.
europepmc   +1 more source

[The guideline for the diagnosis and treatment of marginal zone lymphoma in China (2025)]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Hematological Oncology Committee of China Anti-Cancer Association, Lymphoid Disease Group, Chinese Society of Hematology, Chinese Medical Association, Lymphoma Expert Committee of Chinese Society of Clinical Oncology (CSCO), Chinese Workshop of Indolent Lymphomas.   +5 more
europepmc   +1 more source

[Radiological characteristics and associated factors of single-level cervical disc herniation combining with focal ossification of posterior longitudinal ligament]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Ye Y, Zhang M, Ren M, Xu C, Zhou P, Zhang C.   +5 more
europepmc   +1 more source

降雨环境下35 kV绝缘子串雷电冲击放电特性与影响规律研究

Dianci bileiqi
在极端强降雨条件下，输电线路、变电站及换流站中的绝缘子伞裙间距因密集的雨柱而被连接，这一现象会显著改变原有电场分布，造成电场畸变。瓷质绝缘子作为电力系统常见绝缘元件，在长期服役过程中，不仅需承受自身重量，还不断受到风力等外部载荷的作用，这些因素作用下，逐渐导致陶瓷内部绝缘性能的退化，进而形成零值绝缘子。为研究强降雨条件35 kV绝缘子串雷电冲击放电特性，针对输电线路复合绝缘子及U70BP/146D瓷绝缘子串不同零值情况开展雷电冲击放电特性测试。结果表明 ...
许军, 方超颖, 董冰冰, 乔雨, 郑钟楠, 程韵初, 林梓圻   +6 more
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[Application of different repair methods for defects after Mohs micrographic surgery for malignant tumors of the external nose]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Li H, Zheng M, Wang X, Qi H, Zhang Z.
europepmc   +1 more source

[How I diagnose and treat chronic myelomonocytic leukemia]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Xiao ZJ.
europepmc   +1 more source

[Risk factor analysis of excessive resection of facet joint after large-channel spinal endoscopic depression for degenerative lumbar diseases]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yan T, Zeng J, Lin X, Li T, Wu C.
europepmc   +1 more source

绝缘膜对压缩气体绝缘设备的击穿和粒子运动的影响

Gaoya dianqi, 1986
在压缩气体绝缘的输变电设备中,通常会受到金属性粒子的污染而大大地损害其绝缘强度。大量的实验表明:用绝缘膜复盖电极不仅能改善设备中气体的绝缘性能,而且也能提高激发导电粒子所需的电压。本文总结了近十年来在压缩气体绝缘设备中,采用绝缘膜来提高其绝缘强度的研究情况。
doaj  

[Analysis and management of the influence of periapical lesion size on endodontic microsurgery]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Huang X, Zeng K, Yang R, Wei X.
europepmc   +1 more source