Abstract ：A passive long wave cochlea model is applied to extract audial feature of naval vessel radiation noise.

摘 要 ：为提取舰船噪听觉特征，应用被动长波模型对舰船噪进行了析，得到噪的二时空。

As a qualitative analysis,finite element method gets a more satisfactory result in describing the propagation of the long wave of open channel unconstant flow.

为一种定性析，有限单元法对描述明渠非恒定流长波的传播给出了满意的结果。