Results 61 to 70 of about 4,310 (102)

提高输电线路耐雷水平的关键因素影响分析

Dianci bileiqi
输电线路是电力系统的重要组成部分，承载着由偏远能源基地向负荷中心输送电能的重任。输电线路的送电距离可达200 km以上，沿途地势地形、气候环境复杂多变，极易遭到雷击。如何提高输电线路的耐雷水平，降低雷击跳闸率是目前亟待解决的问题。本研究以330 kV同塔双回输电线路为例，分析了冲击接地电阻、耦合地线和避雷器配置方式等关键因素对输电线路耐雷水平的影响。研究结果有助于指导防雷方案设计，对提高输电线路的耐雷水平具有一定的参考价值。
张军强, 王选社, 盛飞, 高若楠, 于淑婷, 刘法亮, 贺博, 张浩   +7 more
doaj  

[Maternal depressive symptoms and adolescent suicidal ideation: the chain mediating roles of childhood trauma and ineffectiveness]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Zhong YY, Li YT, Chen JH, Chen RM, Cong EZ, Xu YF.   +5 more
europepmc   +1 more source

[Analyzing the multidisciplinary strategies for diagnosis and treatment of patients with burns and trauma from a management perspective]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Chen H.
europepmc   +1 more source

面向环保接地施工的杆塔分支式外延接地网接地特性研究

Gaoya dianqi
低碳环保已成为国家的战略和政策导向，输电杆塔在降阻施工时，常采用敷设长距离外延接地极方式接地，造成资源浪费、环境破坏等问题。针对杆塔接地施工环境的复杂性与施工面积的有限性，文中提出输电线路杆塔分支式外延接地网散流降阻结构，实现了接地降阻施工的低碳环保。首先，仿真计算单根外延接地极的有效降阻长度；然后，研究了土壤电阻率、入地电流频率对单分支式和多分支式外延接地网降阻特性的影响规律；最后，分析了不平衡分支式外延接地网的散流特性。结果表明：相比于传统方框带射线型接地网，分支接地极结构比例为1 ...
廖玉琴, 屈路, 杨跃光, 廖民传, 李文荣, 王敩青   +5 more
doaj  

[Development and electrophysiological validation of a temporal interference transcranial magnetic stimulation system for mice]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Cui C, Wang T, Zhang Y, Zheng W, Xu G.
europepmc   +1 more source

[Research progress on quantitative magnetic susceptibility imaging reconstruction method based on improved U-network model]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Yang W, Zhang R, Keung S.
europepmc   +1 more source

[A heterogeneous graph method integrating multi-layer semantics and topological information for improving drug-target interaction prediction]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Chen Z, Guo Y, Song S, Guo Q, Zhou D.
europepmc   +1 more source

[Risks, mechanisms, and prevention strategies for cerebrovascular diseases in lunar astronauts under deep]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Tang L, Tang Q, Li Y, Wang L, Zhang F, Zhang X, Liu R, Zhang L.   +7 more
europepmc   +1 more source

[Prefrontal dysfunction and mismatch negativity in adolescent depression: A multimodal fNIRS-ERP study]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Sun H, Zhang L, Li J, Li Z, Huang J, Zheng Z, Zou K.   +6 more
europepmc   +1 more source

[Inhibitory Effects of the Deep Underground Low Background Radiation Environment on the Proliferation and Migration of NP69 Human Nasopharyngeal Epithelial Cells and the Underlying Mechanisms]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Hao Z, Li C, Wang L, Zou Y, Wen J, Wu J, Wan X, Liu F, Liu J.   +8 more
europepmc   +1 more source