order reduction

• 降阶

order reduction的用法和样例：

例句

1. Then the high order model was reduced by the modal aggregation method.
   采用模态集结法对其高阶模型进行降阶。
2. In pattern recognition and in image processing, Feature extraction is a special form of dimensionality reduction.
   在模式识别和图像处理领域中，特征提取是一种特殊的维数降阶的形式。