Results 61 to 70 of about 587 (104)

[Prospects and technical challenges of non-invasive brain-computer interfaces in manned space missions]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Ju Y, Liu J, Li Z, Liu Y, He H, Liu J, Liu B, Wang M, Zhang Y.   +8 more
europepmc   +1 more source

GIS盆式绝缘子残余应力分布检测及成像研究

Gaoya dianqi
盆式绝缘子是GIS的重要支撑绝缘结构，但是浇注成型过程中环氧树脂交联反应和冷却收缩会使盆式绝缘子内部产生一定的残余应力，与运行载荷叠加容易导致盆式绝缘子开裂，严重威胁GIS设备可靠运行。文中基于声弹性效应设计了一套针对盆式绝缘子内部残余应力的自动检测与成像系统，首先测试了2.5、1.5 MHz两种频率下环氧树脂复合材料的超声纵波声弹性系数，通过编写工业机械臂扫描路径程序完成对盆式绝缘子各个待测点位超声传输时间的自动采集，联立双频下声弹性方程消去构件厚度变量，实现盆式绝缘子内部残余应力分布检测与成像 ...
陈荣, 何金, 贺春, 李松原, 赵琦, 刘松涛, 张涵璞, 李进   +7 more
doaj  

[Experimental study on the treatment of postmenopausal osteoporosis with low-frequency pulsed electromagnetic fields]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
An Z, Wang L, Wu Y, Pang Y, Chen K, Gao Y.   +5 more
europepmc   +1 more source

[Application of intelligent oxygen management system in neonatal intensive care units: a scoping review]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
He H, Sun QY, Tang Y, Dai JL, Zhang HX, He HY.   +5 more
europepmc   +1 more source

分体分步式换流变有载分接开关研制

Gaoya dianqi
特高压直流换流变压器有载分接开关长期承载满负荷运行的方波电流，切换电流di/dt大，熄弧困难，并且动作频繁，基本被国外企业垄断。文中首先针对特高压换流变传统有载分接开关无任何直接有效的电气量监测保护的“黑盒”难题，以及故障极易引起换流变本体损坏，影响特高压直流工程可用率问题，提出了一种分体分步式有载分接开关拓扑，实现换流变有载分接开关核心部件分体布置以及分步闭环控制保护，并分析梳理了工程应用的电气应力；然后进行了切换开关、分接选择器和控制保护装置等关键核心部件的研制；最后搭建基于LC谐振法的切换试验系统，
吕玮, 陈羽, 孙超, 王文杰, 许元震, 方太勋   +5 more
doaj  

[Bioactive substances delivery for bone repair via nanocomposites: advantages, mechanisms, and emerging trends]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Ma Y, Du Z, Wang J, Li X.
europepmc   +1 more source

[Risks, mechanisms, and prevention strategies for cerebrovascular diseases in lunar astronauts under deep]. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Tang L, Tang Q, Li Y, Wang L, Zhang F, Zhang X, Liu R, Zhang L.   +7 more
europepmc   +1 more source

[Biomechanical advantages of personalized Y-shaped plates in treatment of distal humeral intra-articular fractures]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yu H, Peng J, Yang J, Yang L, Xu Z, Yang C.   +5 more
europepmc   +1 more source

[Design and validation of a novel knee biomechanical test method]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2023
Wang J, Zhao Z, Jiang C, Nie C, Shi Q, Liu M, Gu J.   +6 more
europepmc   +1 more source

[Difference of compensatory mechanisms in bilateral knee osteoarthritis patients of varying severity]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Hu B, Wang J, Zhang H, Deng T, Nie Y, Li K.   +5 more
europepmc   +1 more source