Dianci bileiqi针对纳秒级的强电磁脉冲对电力系统的损害问题，基于压敏电阻的特性和瞬变场传输理论，通过改变脉冲注入电压分析不同参数的压敏电阻在20/500-550 ns波形下的响应特征，结合滤波器理论，利用ADS（Advanced Design System）仿真软件进行设计，仿真结果为在频率50 Hz以内插入损耗小于0.3 dB的巴特沃斯低通滤波器，将滤波器串联在两片伏安特性相同的压敏电阻中间进行脉冲注入测试。实验结果表明：随着注入电压的增大，单片压敏电阻的过冲峰值电压逐渐增大，钳位电压基本不变，且与压敏电压呈正相关 ...
李祥超, 郭稳, 王兵
doaj
Jianzhu Gangjiegou Jinzhan, 2019 黄石奥体中心体育馆钢结构罩蓬采用了树状支撑铸钢节点,为考察其在最不利设计工况下的受力性能,对树状支撑铸钢节点进行了足尺试验研究和非线性有限元分析。试验结果表明,在1.3倍设计荷载工况作用下,节点处于弹性状态,卸载后没有明显残余变形。有限元分析结果与试验结果吻合良好,弹塑性有限元分析得到的铸钢节点极限承载力满足《铸钢节点应用技术规程》中的相关要求,该铸钢节点具有较高的强度储备。分析了轴力与弯矩共同作用下铸钢空心球节点的应力分布规律,可为铸钢空心球节点的设计提供参考。
冷钟文 +4 more
doaj
[Refined surgical protocol and clinical efficacy of total expansion auricular reconstruction surgery]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiHao DY, Song BQ, Dong LW, Cang ZZ.
europepmc +1 more source
Jianzhu Gangjiegou Jinzhan基于扩孔螺栓连接型耗能段和自复位SMA支撑，提出一种新型自复位耗能段，具有强耗能、高延性、低残余变形和低损伤等特点，可进一步提高偏心支撑结构的抗震性能和震后功能恢复能力。分别设计3个考虑摩擦滑移的自复位耗能段和1个普通自复位耗能段试验模型，并进行往复加载研究，得到其变形或破坏模式、滞回曲线和骨架曲线等。结果表明，滑移阶段耗能段处于相对静止状态，所有构件均处于弹性；非滑移阶段中耗能段依次发生滑移、屈服、翼缘和腹板屈曲现象，整个过程中自复位SMA支撑中SMA受拉，并为自复位耗能段提供承载力、耗能能力和复位力。
张波 +4 more
doaj +2 more sources
[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 ZhiXu ZC +6 more
europepmc +1 more source
[Donor leukemia relapse and conversion type after allogeneic hematopoietic stem cell transplantation: a case report]. [PDF]
Zhonghua Xue Ye Xue Za ZhiLi RJ, Xiong M, Wang G, Cui Z, Zhu JL.
europepmc +1 more source
[Basic knowledge and skills required in external fixation and foot and ankle reconstruction]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiQin S, Du H.
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[Attributable disease burden of low bone mineral density related fractures in people over 50 years old from 1990 to 2023 in China]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiLai Z +5 more
europepmc +1 more source
[Biomechanical characteristics of lower limbs after discoid lateral meniscus injury surgery]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhou Z +5 more
europepmc +1 more source
[Two siblings with congenital erythropoietic porphyria in one family: case report and literature review]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiYang YQ, Han Y, Zhang CL, Xie M.
europepmc +1 more source