Nyquist theory

例句：

1. 1. The Nyquist theory is widely used in the field of communication systems.
   奈奎斯特理论在通信系统领域得到了广泛应用。
2. 2. The Nyquist theory provides a mathematical framework for analyzing the behavior of signals.
   奈奎斯特理论为分析信号的行为提供了一个数学框架。
3. 3.In the Nyquist theory, the maximum frequency that can be detected by a system is determined by the bandwidth of the input signal.
   根据奈奎斯特理论，一个系统能够检测到的最大频率由输入信号的带宽决定。