Results 131 to 140 of about 13,666 (211)

干式三相变压器振动噪音控制及制造方法

机械与电子控制工程, 2022
李 靖, 朱笑笑
semanticscholar   +1 more source

[Outcomes of suture-mediated vascular closure device in the closure of left brachial artery access site after thoracic endovascular aortic repair]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Li W, Zhang X, Li W, Zhang T, Zhang X.
europepmc   +1 more source

电力变压器电气高压试验技术要点分析

水利电力技术与应用, 2022
苗 宝
semanticscholar   +1 more source

[Advancements in biomechanics and orthodontic strategies for clear aligner therapy]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Lei X, Jin F.
europepmc   +1 more source

用于大容量电力电子变压器的兆瓦级中频隔离变压器绕组设计与实验

Gaoya dianqi
兆瓦级中频变压器工作频率为数百到数千Hz，是大容量电力电子变压器（PET）的电磁耦合环节关键部件。通过提升变压器工作频率可以显著减小变压器体积，提高系统功率密度，而中高频涡流效应及大电流通流会造成变压器绕组损耗增大，效率降低。传统工频变压器绕组形式和结构因涡流损耗较大的原因将不再适用于兆瓦级中频变压器。目前，针对兆瓦级中频变压器的绕组组成及结构形式的研究较少。文中基于兆瓦级中频变压器绕组的频率特性，讨论不同绕组的理论计算方法。分析不同绕组的电密分布及损耗情况，选取了铜箔绕组作为兆瓦级中频变压器绕组 ...
胡家亮, 周兴达, 崔彬, 潘海宁, 赵彪, 尹立坤   +5 more
doaj  

[Performance evaluation of different filtration fractions during daytime continuous renal replacement therapy]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Wang L, Chen Y, Xu G, Xu C.
europepmc   +1 more source

[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

[Short-term effecetiveness of endoscopic lumbar discectomy combined with annular suturing in treatment of lumbar disc herniation]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhang S, Yao F, Liao Z, Wang T, Shen M.
europepmc   +1 more source

[How I treat vasovagal syncope in children]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Zou RM, Wang C.
europepmc   +1 more source

[Research advances in clear aligner]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Chen S.
europepmc   +1 more source