Results 51 to 60 of about 3,452 (102)

高电位梯度ZnO压敏电阻大电流冲击下电学性能的研究

Dianci bileiqi, 2009
通过Y2O3掺杂等工艺手段制备出具有高电位梯度值的ZnO压敏电阻,并进行大电流冲击条件下的电学性能测试。实验结果表明,在掺杂0.08%（摩尔浓度）Y2O3后,试样的电位梯度值达到2 460.5 V/mm,残压比为1.48,最大通流容量达到1 263 A,能量耐受密度达到404.7 J/cm3,具有良好的抵抗大电流冲击的性能。掺杂后的试样晶粒尺寸减小到1.5μm,并且分布比较均匀,细致均匀的微观结构有利于试样电位梯度和大电流冲击下电学性能的提高。
柯磊, 蒋冬梅, 马学鸣
doaj  

[Comparison of effectiveness between endoscopic and microscopic anterior cervical discectomy and fusion]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Huang C, Chen K, Liu H, Ge Z, Lin D, Chen B, Su G, Lin Y, Hou Y, Li Y.   +9 more
europepmc   +1 more source

Y/Ce共掺杂对高梯度压敏陶瓷电阻综合电性能的改善

Dianci bileiqi
对ZnO基压敏电阻进行了Y、Ce两种元素的共掺杂，通过改变Y和Ce之间的比例，寻找最优的Y、Ce共掺杂比例。通过X射线衍射仪、扫描电镜对样品的微观结构进行表征，利用对数正态分布概率密度函数对晶粒粒径分布进行了拟合。利用金属氧化物直流参数测试仪对样品的压敏电压、漏电流和非线性系数进行测量，利用脉冲电流测试设备测试样品的8/20μs雷电波残压比与2ms方波电流通流能力。采用精密阻抗分析仪测试样品的C-V特性曲线。研究发现当Y、Ce两种元素协同作用时，能使ZnO晶粒尺寸分布最优化。当两种稀土离子的比例合适时 ...
董建洪
doaj  

[Establishment and international comparison of reference methods for glycated hemoglobin]. [PDF]

Se Pu
Wang M, Zhang SL, Zhang R, Song YC, Shi J, Xue QZ, Hu YW.   +6 more
europepmc   +1 more source

[Effect of lower limb amputation on hemodynamic environment of the left coronary artery: a numerical study]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Tai T, Jiang W, Li Z, Diao J, Li X.
europepmc   +1 more source

[Risk factor analysis of excessive resection of facet joint after large-channel spinal endoscopic depression for degenerative lumbar diseases]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yan T, Zeng J, Lin X, Li T, Wu C.
europepmc   +1 more source

[Clinical efficacy of two-stage ear reconstruction using autologous rib cartilage in the correction of congenital microtia]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Xu ZC, Zhang Q, Xu F, Li DT, Li YY, Chen X, Zhang RH.   +6 more
europepmc   +1 more source

[Early effectiveness and safety of mini open endoscopy assisted anterior cervical discectomy and fusion in treatment of cervical spondylotic myelopathy]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Pan X, Wang X, Wang C, Su W, Sheng J.
europepmc   +1 more source

[Effects of retropubic and obturator urethral suspension on postoperative maximum flow rate and residual urine volume]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Wang Q, Ke H, Ding Z, Zhang W, Zhang X, Xu T, Xu K.   +6 more
europepmc   +1 more source

[Trends of disease burden on spinal cord injury in China from 1990 to 2023]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yang F, Han Y, Pan W, Luo X.
europepmc   +1 more source