Results 81 to 90 of about 4,442 (142)
Gaoya dianqi, 2019 绝缘管型母线是一种新型的母线产品,有着优异的性能。但应用时间较短,研究不够深入,致使故障频发。文中设计与制备了含气泡缺陷环氧浇注绝缘管型母线真型样品,通过加压电破坏试验,研究其电击穿机理。在试验中首次发现了气体膨胀鼓包导致最终击穿的破坏方式。研究结果表明,电—机械击穿应为其击穿模式,其击穿过程可分为气体增强阶段和击穿临界阶段两个阶段,并得到了阶段特征与阶段变化判据。气隙内由局部放电导致环氧树脂分解所产生的气体气压超过气隙壁断裂韧性临界值,造成裂纹失稳扩展是击穿的主要原因 ...
任想 +6 more
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[Effect of porous surface structure on fatigue strength of 3D printed zirconia]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZhao J +6 more
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Zhendong Ceshi yu Zhenduan针对振动作用下发电机绕组绝缘断裂损伤机理与偏心故障影响机制尚未明确的问题，提出考虑静态偏心故障的绕组绝缘损伤分析方法。首先，建立理论模型，对偏心前后的绕组电磁力与绝缘断裂情况进行解析；其次，构建有限元分析模型并进行电磁场分析，验证偏心前后的电磁力分布、幅值及频率变化；然后，进行结构场仿真，揭示绝缘应力分布与裂纹扩展情况；最后，通过实验来验证理论模型与有限元分析结果。结果表明：在正常情况下，各绕组所受电磁力基本相同；发生偏心故障后，气隙减小（增大）处绕组电磁力增大（减小 ...
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[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
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[New concepts, methods, and techniques for unilateral cleft lip repair]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiShi B.
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[Comparison of effectiveness between two endoscopic lumbar interbody fusion techniques and minimally invasive transforaminal lumbar interbody fusion for single-level lumbar degenerative disease]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiLi Y, Kong W, Li J, Ma C, Ren Y.
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[Research progress of meniscal centralization for degenerative medial meniscus extrusion]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhao Q, Niu X, Huang J.
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[Aesthetic goals of hypospadias repair]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiTang Y.
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