This paper tries to discuss the work principle of frequency transformation on the circuit where diodes work on on-off speciality.
该文系统地讨论二极管工作在开关特性下所组成电路的频率变换的工作原理。
First, analysis and explain that DGN hydraulic load controller's principle. Then analyze dynamic speciality in closed loop of DGN hydraulic load controller.
文章首先介绍DGN液压加载控制器的原理，然后对DGN液压加载控制器闭环动态控制特性进行了的分析。
Introduced are the structure, measuring principle and speciality of the memory ultrasonic flowmeter.
介绍了存储式超声流量计的仪器结构、测量原理和特点。
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