index of modulation

例句：

1. 1.The index of modulation is used to measure the efficiency of a device's performance.
   调制指数用于衡量设备性能的效率。
2. 2. In this experiment, we found that the index of modulation was affected by the frequency ofthe input signal.
   在这个实验中，我们发现调制指数受输入信号频率的影响。
3. 3.The index of modulation is crucial for understanding the behavior of complex systems.
   调制指数对于理解复杂系统的行为至关重要。