normalized spectral density

例句：

1. 1. The normalized spectral density is a measure of how well the system can handle different types of data.
   归一化频谱密度是一个衡量系统处理不同类型数据能力的指标。
2. 2. In this study, we normalized the spectral density to account for the varying signal-to-noise ratios acrossdifferent sensors.
   在这项研究中，我们归一化了频谱密度，以考虑到不同传感器之间信号与噪声比的差异。
3. 3. To improve the accuracy of the model, we normalize the spectral density and apply a smoothing technique.
   为了提高模型的准确性，我们对频谱密度进行归一化，并应用平滑技术。