In this paper, a rapid algorithm from infix expression to prefix one is proposed.

本文给出一种将中缀表达式转换成前缀表达式的有效算法。

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Based on acoustic intensity, the estimation of ship motion parameters is put froward, and a rapid algorithm is introduced.

该方法采用了基于音段和听觉的方法来改变语谱特征参数，算法简便，计算量少，便于实时处理。

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Based on acoustic intensity, the estimation of ship motion parameters is put froward, and a rapid algorithm is introduced.

基于声强矢量测量法提出了舰船目标运动参数的估计方法，并提出了快速算法。

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