Apply frequency conversion technique to save energy, improve the shift peak load capacity of electric network for the units and ensure the safe and stability operation of network.
利用变频调速技术节约电力，提高电网对机组的调峰能力，保证电网的安全稳定运行。
Based on the fact that a chirp radar signal has a strong coupling between time and velocity, a deceptive jamming technique with shift frequency is proposed.
本文基于线性调频脉压信号在时间和多卜勒频率间存在强耦合的事实，提出用移频干扰实现欺骗干扰的方法。
Signal demodulation of automatic block with audio frequency shift modulated track circuits was implemented with phase-locked loop (PLL) technique and a singe chip microcomputer.
利用锁相环(LL)窄带跟踪特性，与单片机结合，实现自动闭塞系统移频信号解调。
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