Results 71 to 80 of about 1,214 (122)

考虑电场非均匀性的多腔室并联间隙等效间距计算方法研究

Dianci bileiqi
多腔室并联间隙具有响应速度快、灭弧性能良好、能有效抑制雷电冲击对电网设备的影响等优点，可作为配网线路防雷措施的补充。多腔室并联间隙不同于普通并联间隙，其雷电冲击闪络路径复杂，装置整体放电特性掌握不全面，难以对放电间隙进行合理设置，而放电间隙设置不当会造成雷电冲击闪络定位失败，导致电弧灼烧绝缘子。为研究多腔室并联间隙的雷电冲击闪络定位条件，本文仿真分析了多腔室灭弧结构的电场非均匀性，根据仿真结果提出将多腔室灭弧结构等效为棒-棒空气间隙；并进一步开展了多腔室灭弧结构的雷电冲击闪络试验 ...
蔡永翔, 肖小兵, 何肖蒙, 邓明海, 李华鹏, 何心怡   +5 more
doaj   +2 more sources

植被燃烧烟雾对导线—板间隙交流击穿特性的影响研究

Gaoya dianqi
架空输电线路下方山火产生的火焰和烟雾会导致间隙绝缘强度下降，可能造成线路跳闸、停运事故。为研究植被燃烧烟雾对间隙击穿电压的影响，文中搭建了间隙击穿模拟试验平台，开展了不同湿度潮湿杉木燃烧烟雾的交流击穿试验，拟合得到了植被湿度与间隙平均击穿电压梯度的关系式。研究结果表明：潮湿植被燃烧不充分时会产生大量灰白色或黑灰色烟雾，且湿度越大火焰高度越小，最高可下降约40%；燃烧初期冷烟全桥接时间隙的平均击穿电压梯度为163 kV/m，约为空气的60.8%；正常生长态的杉木火焰/烟雾间隙平均击穿电压梯度最低为56.5
周仿荣, 文刚, 黄道春, 李慧鹏, 王华清, 马仪, 王国芳, 潘浩   +7 more
doaj  

[Comparison of effectiveness between endoscopic and microscopic anterior cervical discectomy and fusion]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Huang C, Chen K, Liu H, Ge Z, Lin D, Chen B, Su G, Lin Y, Hou Y, Li Y.   +9 more
europepmc   +1 more source

[Early effectiveness and safety of mini open endoscopy assisted anterior cervical discectomy and fusion in treatment of cervical spondylotic myelopathy]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Pan X, Wang X, Wang C, Su W, Sheng J.
europepmc   +1 more source

[Effect of porous surface structure on fatigue strength of 3D printed zirconia]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhao J, Ding Q, Li W, Ma Q, Lan Y, Zhang L, Han J.   +6 more
europepmc   +1 more source

[Magnetic fluorinated covalent triazine frameworks for efficient extraction of perfluorinated compounds]. [PDF]

Se Pu
Zhang WM, Liu GC, Fang M, Guo JL, Zhang L.   +4 more
europepmc   +1 more source

[Evaluation of the filling effects of three root canal sealers by Micro-CT]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Huang R, Zeng X, Jiang L, Zhang L, Zhu J, He F.   +5 more
europepmc   +1 more source

[Lapidus arthrodesis combined with middle metatarsal base rotation osteotomy in treatment of hallux valgus with metatarsus adductus]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Shang L, Lü Z, Zhao S, Chu L, Li C, Gao F, Lu J, Zhang W.   +7 more
europepmc   +1 more source

[Clinical effects of free latissimus dorsi muscle flap harvested through small incision under the assistance of endoscopy in repairing deep wounds in limbs]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Hou HY, Xie ST, Cao T, He X, Zhang N, Guan H.   +5 more
europepmc   +1 more source

[Effect of composite graphene-protein hydrogels on neural regeneration after spinal cord injury in rats]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang Z, Fan Z, Wang X, Zhu Z.
europepmc   +1 more source