Results 111 to 120 of about 997,974 (152)
Gaoya dianqi, 2004 研制了一套GIS中局部放电的特高频检测系统。用特高频天线和频谱分析仪采集局放信号,通过GPIB卡传送给计算机进行分析处理,并在GIS中构造了一种常见的故障类型,对该系统进行了验证。实验结果表明,该系统能够采集到GIS中局部放电产生的特高频信号。
印华, 邱毓昌, 张小勇, 王建生
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, 2003 介绍了HIRFL主加速器SSC高频腔体功率馈入耦合匹配系统的研究,实验结果表明,通过改变耦合环角度可更好地实现高频腔体和高频发射机之间的匹配 ...
郑启文,张生虎,高宜海,李智慧,郁奇,俞鸣峰
core
, 2009 介绍了高频脉冲管制冷机冷指无磁非金属材料的选择、加工以及实验优化工作。制作的高频无磁脉冲管制冷机冷指在风冷,2.3 MPa充气压力,44 Hz,70 W电功率输入条件下,最低达到73.4 K的无负荷最低温度;60 W电功率输入,最低温度为74.0 K,在80 K时可以提供0.1 W的制冷量 ...
杨鲁伟 +4 more
core +1 more source
[Deep learning-driven high-frequency ultrasound method for skin aging assessment]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiZhang X +5 more
europepmc +1 more source
[Clinical study on the application of ultra-high-frequency ultrasonography in the diagnosis and treatment of recurrent preauricular sinus]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za ZhiYu J +6 more
europepmc +1 more source
[Efficacy of precisely designed first dorsal metacarpal artery flap under the guidance of high-frequency color Doppler ultrasound in repairing small-sized skin and soft tissue defects in the thumb]. [PDF]
Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za ZhiFu JS +8 more
europepmc +1 more source
[Application of high frequency jet ventilation system in laryngopharyngeal and tracheal surgery]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2021 Kuang S, Wei X, Yan W.
europepmc +1 more source
[Efficacy of volume-guaranteed high-frequency oscillatory ventilation in preterm infants with respiratory distress syndrome and its impact on cerebral blood flow in the middle cerebral artery]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiWang YY, Wei XX, Yin HW, Zhu HB.
europepmc +1 more source
, 2003 本发明涉及一种高频高压锯齿波发生器，包括脉冲形成电路、脉冲放大电路；脉冲放大电路的输出信号控制高频高压锯齿波发生电路相连；脉冲放大电路的输出信号控制高频高压锯齿波发生电路中的四极管的通断，其高压电源通过电感及容性负载自身进行充放电；本发明利用高频大功率电子管作高压控制开关并利用电感、容性负载直接充放电，从而在容性负载上直接形成高频高压锯齿波，其波形好、波形指标优、峰峰值电压高 ...
蒋君章、石爱民、许哲
core
Dianci bileiqi, 1989 无间隙氧化锌避雷器已被用于高压直流系统.加在高压直流避雷器上的电压不是简单的正弦波,所以泄漏电流中含有高频成分.采用5kV/500kW桥阀对比例1/25的阀用避雷器节进行了能量吸收试验.测定了氧化锌阀片的高频能量吸收特性 ...
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