Results 61 to 70 of about 4,579 (117)

2019 年德国汉诺威工业展综览与未来发展趋势 [PDF]

open access: yes, 2019
付爽   +6 more
core  

电子式互感器辐射发射超标诊断及整改方法

open access: yesGaoya dianqi
电子式互感器是一种配电装置,由连接到传输系统和二次转换器的一个或多个电压或电流传感器组成,向仪器、继电保护或者控制装置传输正比于被测物理量的数值。一组电子式互感器共用一台合并通信单元。合并通信单元将来自变送段的电流或电压采样数据与采样时间进行相关的组合,并按约定的通信协议以数据帧的形式连续发送至以太网。依据GB/T 20840.8—2007标准规定的辐射发射试验来考核某型号电子式互感器时,发现其合并通信单元存在电磁辐射干扰超标现象。通过分析超标频点的干扰形成原因,采用了时钟扩频技术对产品电路进行改进 ...
姜楠   +6 more
doaj  

[How I treat vasovagal syncope in children]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Zou RM, Wang C.
europepmc   +1 more source

[Extracellular matrix materials and tissue regeneration and repair]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhao L, Xie H.
europepmc   +1 more source

[Anteromedial cortical support reduction in treatment of trochanteric femur fractures: a ten-year reappraisal]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Hu S   +7 more
europepmc   +1 more source

[Research progress on the early warning of heart failure based on remote dynamic monitoring technology]. [PDF]

open access: yesSheng Wu Yi Xue Gong Cheng Xue Za Zhi
Shi Y   +6 more
europepmc   +1 more source

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