After a bandpass filter, QDPSK signal's symbol can be divided into steady section and transition section, so the demodulation and synchronization for the signal can be realized with DFT.
经过限带滤波后的QDPS K信号的码元波形可分为稳定区与过渡区，根据这一特点可以利用DFT方法来实现信号的解调和位同步。
A clothoid curve is used with its fine feature for the shape of transition section between spherical head and cylindrical shell of pressure vessel.
利用回旋曲线的优良特性，将其做为压力容器部分半球形封头与圆柱筒体之间的过渡曲线，实现了在连接边缘上无附加边缘应力的光滑连接。
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