Results 31 to 40 of about 99 (83)

[Research and application of photovoltaic cell online monitoring system for animal robot stimulator]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi, 2022
Shi Y, Yu Z, Yan R, Wang H, Yang J, Huai R.   +5 more
europepmc   +1 more source

SF₆断路器模拟烧蚀过程中气体分解产物特性研究

Gaoya dianqi
SF6断路器灭弧室中的SF6、微水微氧及固体绝缘材料在电弧作用下会分解重组，生成新的组分气体。为研究SF6断路器完整电寿命周期内，开断电流后各气体分解产物体积分数的变化规律，搭建了断路器全寿命模拟烧蚀试验平台，进行了69次烧蚀试验，测量了烧蚀过程中的电压电流参数和各气体分解产物体积分数。结果表明：SOF2、CF4、SO2为主要产物，SO2F2、SOF4体积分数较低，H2S不能稳定检出；SOF2、CF4、SO2、SO2F2体积分数均随烧蚀次数增加而增加。主要产物中 ...
相中华, 孙尚鹏, 魏莹, 王尧平, 王羽, 马飞越   +5 more
doaj  

环氧树脂的湿热老化特性及寿命预测

Gaoya dianqi
环氧树脂由于其优异的绝缘密封性能被广泛应用于干式空心电抗器，然而在湿热环境中环氧树脂易吸水受潮导致材料性能劣化，严重影响设备的安全稳定运行，有效的寿命预测方法或技术对于提高设备可靠性、减少经济损失具有重要意义，因此文中研究了基于活化能的环氧树脂寿命预测方式。首先对环氧树脂材料进行湿热老化，研究老化前后表面样貌和化学结构的变化，实验发现老化后环氧树脂表面出现许多微孔，吸收电流和极化电荷均随吸水率的增大而增大，老化过程中环氧树脂发生酯基的水解；接着用Kissinger法和Flynn-Wall ...
张国平, 范伟男, 杜钢, 王勇, 李光茂, 王希林, 贾志东   +6 more
doaj  

A case of glycogen storage disease type Ⅰa with gout as the first manifestation. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban, 2023
Dan L, Song X, Yu H.
europepmc   +1 more source

[Co-delivery of Pirarubicin and Vinorelbine by Micelles for the Treatment of Breast Cancer]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban, 2021
Chen D, Zhou HL, Zhao T, Guo CQ, Zhang RP, Li J, Gong T.   +6 more
europepmc   +1 more source

[Application of three-dimensional printed customized prosthesis with preserved epiphysis and articular surface in the reconstruction of large bone defects in treatment of adolescent femoral malignant tumors]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi, 2022
Niu X, Gao S, Qu G, Li Z, Liang X, Yao W, Zhang P.   +6 more
europepmc   +1 more source

[Pulpotomy of human primary molars with novel bioceramic material]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban, 2022
Wang S, Peng CF, Liu H.
europepmc   +1 more source

Combined micro-apical surgery and vital pulp therapy in mandibular second molars with external root resorption caused by impacted teeth. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi, 2023
Song D, Luo Y, Liu X, Hu P, Huang D.
europepmc   +1 more source

Consensus on the preparation margin and restoration margin in ceramic esthetic rehabilitation. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi, 2022
Yu H, Yue L, Liu W, Liu F, Niu L, Shao L, Liao H, Luo X, Li H, Jiang Q, Yu H, Zhao B, Wu Z, Li C, Wu G, Wang Y, Mou Y, Liu Y, Zhang H, Chen J, Liu H.   +20 more
europepmc   +1 more source

[Retrospective evaluation of treatment outcomes in immature teeth treated with regenerative endodontic procedures with an over-36-month review]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban, 2023
Dai YF, Liu H, Peng CF, Jiang XJ.
europepmc   +1 more source