zero frequency normalization

例句：

1. 1.In zero-frequency normalization, the data is normalized to a constant scale.
   在零频率归一化中，数据被归一化到常数尺度。
2. 2. The zero-frequency normalization technique is used in signal processing.
   零频率归一化技术用于信号处理。
3. 3.The zero-frequency normalization method has been shown to improve image quality.
   零频率归一化方法已被证明可以提高图像质量。