... 中频控制 Middle Frequency Control 低频控制 Low Frequency Control 推杆前/推杆后控制 Pre/Post Selector ...
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By comparing with the existing method with time-domain analysis three algorithms discussed in this paper are predominant in qualities. The algorithms can give effectively judgment for the track circuit FSK and low frequency control signal.
三种算法都解调出轨道电路移频信号和低频控制信号的频率，与以前的时域分析法相比，有了质的提高，能有效的判别轨道电路移频信号的频率与低频控制信号。
参考来源 - 轨道移频信号特征频率提取·2,447,543篇论文数据，部分数据来源于NoteExpress
讨论了正弦波输出的交—交变频器触发角的控制方案，实现了双微机控制的交—交变频器的低频控制，给出了实际运行波形。
The triggering Angle modulation method of the sine-wave cyclo-converter is carried out, and the operating wave form of the designed system is put forward.
低频电磁场电流测控系统包括电流测试和输出控制两个部分，由软件和硬件相互配合组成一个完整的计算机控制系统。
The current measurement and control system in a Low-frequency Magnetic Field is a comprehensive system of hardware and software, including two parts: current measurement and computer control.
这是事实，他们错误的让人类尊称他们为“神”来供奉，人类在那个时候被控制在一个低频率的振动以服从他们的法律。
Whilst it is true that they falsely presented themselves as gods, Man was in that time at a low point in his vibrations and open to their rule.
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