Results 111 to 120 of about 2,946 (151)

[Analysis on quality value transmitting of Qinggusan reference sample of classical prescription based on quantitative fingerprint technology]. [PDF]

Se Pu, 2023
Xu X, Wei T, Xue Q, Ai J, Li G, Liu Z, Li D, Hou J, Jin H, Liu Y, Liang X.   +10 more
europepmc   +1 more source

劣化支柱瓷绝缘子电瓷性能及断裂原因分析

Dianci bileiqi
在机械、热、电和环境等多种因素的长期作用下，支柱瓷绝缘子的电瓷性能发生显著劣化，同时在表面以及内部容易产生微裂纹，最终导致支柱瓷绝缘子发生断裂，影响变电站的安全运行。本文研究两支运行年限超15年劣化断裂的硅质和铝质支柱瓷绝缘子，通过机械性能、化学成分、晶相、显微结构分析了两种劣化支柱瓷绝缘子的瓷件理化特性和微观形貌，并对未涂覆沥青缓冲层的支柱瓷绝缘子承受应力情况开展了热应力仿真模拟。断裂硅质瓷支柱绝缘子的微观结构呈现疏松多孔特征，大量石英颗粒与基体形成环状微裂纹 ...
徐碧川, 刘方吉, 马笛琴, 晏年平, 胡睿智, 陈田   +5 more
doaj  

Expert consensus on classification and diagnosis of congenital orofacial cleft. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Li C, An Y, Duan X, Guo Y, Liu S, Luo H, Ma D, Ren Y, Wang X, Wu X, Xie H, Zhu H, Zhu J, Shi B.   +13 more
europepmc   +1 more source

[The application of low-temperature plasma minimally invasive therapy in children with pharyngeal neoplasm]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi
Zhang Y, Xia Z.
europepmc   +1 more source

[Post-aging comparative study of snowplow and conventional techniques for the resin restoration of defective primary teeth]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Han M, Lü J, Guan J, Wang M, Lü X, Jin X.   +5 more
europepmc   +1 more source

基于模态分析的GIS盆式绝缘子带电检测技术

Gaoya dianqi
GIS盆式绝缘子表面污秽和裂纹等缺陷会使得其表面的闪络电压降低，严重危害电力网络的正常运行，因此盆式绝缘子状况检测研究对于保障电网安全运行具有重要意义。基于模态分析法，文中研制了盆式绝缘子状态带电检测系统，对盆式绝缘子表面污秽、裂纹缺陷开展试验研究。结果表明盆式绝缘子污秽缺陷会使得其模态传递函数幅值发生变化，且盆式绝缘子模态特性对于污秽质量的变化敏感；裂纹缺陷会使得盆式绝缘子模态传递函数极值点发生后移；表面污秽与表面裂纹缺陷共同作用下，模态传递函数的高频段2 000~4 000 Hz内幅值变化更剧烈 ...
李璐, 彭琪, 苏征, 刘琛浩, 宋颜峰, 李军浩   +5 more
doaj  

[Effect of slurry proportion on the microstructure and properties of dental lithium disilicate ceramics manufactured through 3D printing]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Lin B, Chen X, Li R, Wan Q, Pei X.
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

[Comprehensive considerations for the diagnosis, treatment, and management of osteogenesis imperfecta]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Lyu XH, Dong J.
europepmc   +1 more source

[Mechanism of the dentino-enamel junction on the resist-crack propagation of human teeth by the finite element method]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi, 2014
Jingjing Z, Tiezhou H, Hong T, Xueyan G, Cui W.   +4 more
europepmc   +1 more source