Results 61 to 70 of about 3,205 (125)

[Structural design and mechanical analysis of a "drum-shaped" balloon-expandable valve stent in expanded configuration]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Zhao Y, Hou Q, Zhou J, Chen S, Zhang H, Qiao A.   +5 more
europepmc   +1 more source

换流变真空有载分接开关谐波电流切换试验技术的研究与分析

Gaoya dianqi
换流变压器有载分接开关是实现换流变压器调压的核心部件，对保证电力系统电压稳定性起到重要的作用。随着柔性直流输电技术的发展，有载分接开关切换含有谐波分量的负载电流工况日益凸显，经常在多次谐波叠加的复杂工况下进行切换操作，因此切换的负载电流零点会有较大的电流变化率，其显著增加了分接开关的切换负荷，尤其对真空有载分接开关中的真空灭弧室转换电流能力提出了极大挑战。因此，文中针对换流变压器应用的真空有载分接开关的谐波电流切换能力的验证开展了相应的试验技术研究，并通过建立的谐波电流切换试验条件开展了性能验证 ...
张长虹, 范广伟, 邓军, 王培人, 周海滨, 谢志成   +5 more
doaj  

["Chongqing experiences" in treatment of bone infections]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Xie Z.
europepmc   +1 more source

[Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry]. [PDF]

Se Pu
Li YJ.
europepmc   +1 more source

[Anti-inflammatory effects of cell membrane vesicle-mediated delivery of small interfering RNA targeting tumor necrosis factor-α on dental pulp stem cells]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Gao R, Ma T, Wang R, Yin Y, Li R, Wang D, Xia B.   +6 more
europepmc   +1 more source

具备限流能力的混合式高压直流断路器拓扑

Gaoya dianqi
直流断路器（DCCB）是解决直流系统短路故障的重要手段，针对现有DCCB存在的限流效果差、避雷器使用寿命短和故障隔离速度慢等一系列缺陷，文中提出一种具备限流能力的混合式高压直流断路器拓扑（CLC-HDCCB）方案。CLC-HDCCB载流支路和转移支路采用双桥式结构，具备双向通断能力；限流部分采用限流电阻和限流电感并联限流方式，显著降低了故障电流峰值及上升率；设计泄能电阻在断路过程中将限流电感旁路，减少了避雷器单次开断吸收的能量；对所提CLC-HDCCB方案分断故障电流 ...
周蒙恩, 王红艳, 孙芮, 钱阳, 刘祚松, 秦宇   +5 more
doaj  

[Finite element modeling and simulation study of solid-liquid biphase fiber-reinforced lumbar intervertebral disc]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Gao Y, Fu Y, Cui Q, Chen S, Liu P, Liu X.   +5 more
europepmc   +1 more source

[Progresses on temporal interference electromagnetic stimulation for non-invasive deep brain function modulation]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Zhou T, Yu P, Xu Y.
europepmc   +1 more source

[Teaching practice of undergraduate graduation projects in clinical laboratory science integrating liquid chromatography-tandem mass spectrometry and external quality assessment]. [PDF]

Se Pu
Shi J, Wang M, Xue QZ, Zhang SL, Hu YW.
europepmc   +1 more source

[Synthesis of a temperature-responsive multimodal motion microrobot capable of precise navigation for targeted controllable drug release]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Zhao X, Liu M, Chen X, Huang J, Liu Y, Xu H.   +5 more
europepmc   +1 more source