Results 51 to 60 of about 2,053 (98)

基于快速真空开关的直流配电组合式断路器

Gaoya dianqi
以短路故障切除与提高供电可靠性为目标的直流系统控保技术是发展新型电力系统的前期攻关重点之一。基于半导体组件的混合式直流断路器做为核心部件已进入工程示范。为解决断路器的高成本以及试运行中出现的可靠性等问题，文中提出了新的组合式直流断路器系统拓扑，把常规直流分支系统中的断路器代之以机械式开关。可大幅度降低整体成本与故障率。基于换流原理的快速直流断路器分闸速度可满足故障电流的发展，有望直接用于直流系统的控保。尝试用交流配电自动化的SCADA概念重建软件平台，创新直流配电系统拓扑，以更高的可靠性与经济性优势 ...
王永兴, 邹积岩, 郭兴宇, 陈忠, 胡迪, 杨为, 茅东, 柯艳国   +7 more
doaj  

[Research progress on the role and mechanism of magnesium element and magnesium materials in tendon-bone interface healing]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yue H, Zhu X, Sun Z, Meng J, Hao S, Dong X, Gao Z.   +6 more
europepmc   +1 more source

[Surgical robot-assisted submandibular gland excision through retroauricular hairline approach: three case reports]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Ma S, He J, Cao C, Wang X, Li C, Zhu G.
europepmc   +1 more source

[Research progress on elbow joint rehabilitation robots]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Li M, Xu F, Wang D, Xu J.
europepmc   +1 more source

[Research progress of infrapatellar fat pad derived mesenchymal stem cells in treatment of osteoarthritis]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wang H, He H, Lu J, Wang Q.
europepmc   +1 more source

[Limb reconstruction over four decades: the seamless path from technical integration to disciplinary ecology]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhu Y.
europepmc   +1 more source

[Research progress in artificial intelligence for the diagnosis and management of diseases in preterm infants]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Yuan Y, Tang LH, Guan LR.
europepmc   +1 more source

[Association between early transpyloric feeding and the risk of bronchopulmonary dysplasia in very preterm/extremely preterm infants]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wang L, Zhang ZX, Lin XZ.
europepmc   +1 more source

[Research advances of magnetic resonance elastography for assessing the bioinvasiveness in hepatocellular carcinoma]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Ma MY, Li RK.
europepmc   +1 more source

[Revolution teaching practice in sample pretreatment supported by large-scale instrument： a case study of magnetic covalent organic framework enriching organic ultraviolet filters in seawater]. [PDF]

Se Pu
Li S, Zhu YL, Ren Z, Gao DD, Gu HL, Lao JL.   +5 more
europepmc   +1 more source