Dianci bileiqi, 2009 2009年6月份山东东营沿海电网发生了2起110 kV复合绝缘子断裂事故,给沿海电网造成了严重危害,影响了电网的安全运行。两次事故的复合绝缘子连接结构均为早期内锲式连接结构,一种断裂是在芯棒劈缝端部;另一种是在劈缝沿轴线方向发展最终断裂。事故主要原因是:内锲结构芯棒端部被锲件扩开后,芯棒事实上已被破坏,在端部形成了应力集中,在受力之后,芯棒与锲子间发生微小位移,受损的芯棒纤维断裂增加;另外端部密封不好,高盐、高酸等腐蚀性气体进入了锯开的缝隙,玻璃纤维对酸敏感 ...
杜正旺
doaj
[Spontaneous facet joint fusion and stability assessment following isolated posterior internal fixation for lumbar burst fractures]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiFu X +5 more
europepmc +1 more source
[Effect of porous surface structure on fatigue strength of 3D printed zirconia]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZhao J +6 more
europepmc +1 more source
, 2016 ［目的］探究采煤塌陷裂隙（塌陷发生２ａ之后）对坡面土壤水分和植被影响的过程与特征，为采煤 塌陷区域植被恢复与生态环境重建提供理论支持。［方法］通过对神府矿区采煤塌陷产生的裂隙两侧的土 壤容重，土壤水分以及植被状况进行调查分析开展研究。［结果］（１）采煤塌陷裂隙的出现会导致周边土 壤松动，致使土壤容重降低。（２）在裂隙走向与坡向呈直角或接近直角的情况下，裂隙的出现阻隔了正常 的坡面径流，裂隙下方由于接受径流变少而导致水分状况变差，裂隙对于坡面土壤水分的影响大约在裂隙 下方３ｍ的范围内；在裂隙两壁处 ...
宋晓强, 刘文兆, 李超
core
[Early postoperative functional outcomes and influencing factors in patients with rotator cuff injury]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiYe Y, Lu B, Li J, Zhang K.
europepmc +1 more source
Dianci bileiqi针对某220 kV线路新投运复合绝缘子伞裙脱落断裂、硅橡胶材质分界缝隙与色泽分层问题，本文选取故障与正常样品，在常规断裂拉伸、热失重、扫描电镜等检测基础上，结合TGA-DSC联测、工业CT扫描、纳米压痕等新技术，开展了材料力学性能、材料组分与交联密度、微观形貌等方面的对比分析。力学性能分析表明，断裂伞裙拉伸强度、拉断伸长率不满足标准要求，硅橡胶分布、局部力学强度均匀性差；工业CT扫描发现芯棒内部、芯棒-护套处存在较多气隙，为出厂缺陷；热失重分析发现断裂部位PDMS含量显著下降且不均匀，属工艺不良问题 ...
高超 +6 more
doaj
[Clinical efficacy of vocal fold injection with fat and rectus abdominis fascia combined with voice training in the treatment of glottal insufficiency]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanTao G +6 more
europepmc +1 more source
[Effectiveness analysis of single-incision treatment for adjacent two-segmental lumbar disc herniation using uni-portal non-coaxial spinal endoscopic surgery]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiHe C +6 more
europepmc +1 more source
[A special type of triple injury of superior shoulder suspensory complex-lateral segment floating clavicle]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiChen Y, Zhao H, Yang M, Xu S, Cai Y.
europepmc +1 more source
[Effectiveness of arthroscopic superior capsular reconstruction using a "sandwich" patch combined with platelet-rich plasma injection in treating massive irreparable rotator cuff tears]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZou W +7 more
europepmc +1 more source