Results 81 to 90 of about 16,713 (119)

直流输电研究近况

Gaoya dianqi, 1972
为尽快地发展我国的直流输电事业,一机部、水电部要求在陕西省建立一条100千伏的直流输电试验线路。一九七一年下半年,在陕西省机械局、陕西省电管局的直接领导下,组成了直流输电研究小组。 用可控硅组成直流输电所必需的换流阀,是目前发展直流输电的一个新方向 ...
doaj  

[Multi-view signal integration via manifold learning for sleep stage classification]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Tong W, Lin X, Wu X, Li T, Wu Q.
europepmc   +1 more source

[Emphasizing the precise application of emergency endoscopy in the treatment of portal hypertensive bleeding in cirrhosis]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Wang BM, Zhou L, Jing Y.
europepmc   +1 more source

[Exploration of the mechanisms of portal hypertension driven by metabolic disorders in non-cirrhotic stages of metabolic-associated fatty liver disease]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Zhao YQ, Wang Y, Liu JJ, You H, Zhao JJ.
europepmc   +1 more source

基于IGCT-Plus直流变压器均流问题的研究

Gaoya dianqi
针对双主动桥DC-DC变换器（DAB）的模块化直流变压器，我公司在新型双有源DC-DC拓扑直流变压器进行设计应用，开展了适用于IGCT-Plus作为模组开关器件的直流变压器试验，实现不同电压等级的直流系统的互联，为不同直流负荷提供稳定的直流电压，试验中该直流变压器存在各支路电流长期不平衡流动，会严重影响直流变压器及整个电力系统的长期稳定运行。根据以往工程经验，通过加装均流磁环可对直流变压器低压侧各支路进行均流，均衡三条并联支路的输出特性，防止某一路长期电流应力过大，造成器件老化损坏 ...
韩迪, 张猛, 王红斌, 刘世钊, 王雪薇, 骆天宇   +5 more
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[Preparation of chiral micro-packed high performance liquid chromatography column with small-size silica gel coated with amylose tris（3，5-dimethylphenylcarbamate）]. [PDF]

Se Pu
Zhang CG, Long YX, Liu H, Song YC, Liang YT, Yuan LM.   +5 more
europepmc   +1 more source

[Colorectal cancer diagnosis method based on dynamic gland-aware and tissue soft-clustering]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Su S, Zhang K, Zhu Y, Zhong X, Xiang L, Dai Y.   +5 more
europepmc   +1 more source

[Joint trajectories and evolution patterns of direct and indirect maternal mortality across 204 countries from 2000 to 2021]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhou Y, Cheng Z, Feng X.
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[Analysis of epidemiological characteristics and spatial clustering of hepatitis C virus in China from 2018 to 2022]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Fan SF, Zhang JH, Duan ZH, Dai Z, He QY.
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[Surgical designs and clinical effects of pedicled transfer of extended lower trapezius musculocutaneous flap in repairing massive wounds in the shoulder and back]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Wang M, Xie TJ, Li SS, Chen ZX, Zhu S, Zang MQ, Liu YB.   +6 more
europepmc   +1 more source