With this system, a varying frequency can be measured automatically in high sampling frequency, and the data are saved in a disk.
它能以较高的采样频率，对一动态变化的频率进行自动测量，并将数据存盘。
Ih this article, the author points out the necessity, methods and effects of technical reform on transmission system of the extruder with the frequency - varying controlling technics.
提出了用变频控制技术改造螺杆挤出机传动系统的必要性，改造方法和效果。
The power system load flow frequency varying with loads can been calculated by dynamic load flow. Through it, state and tendency of power system are shown.
动态潮流可以提供系统潮流分布和频率随负荷变化的大体趋势，显示系统状态的走向，为系统态势分势提供依据。
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