The decay rate of the corresponding strong solution at infinity is also given for some kinds of initial data with exponential decay.

若其初值以指数方式衰退，且空间可微，则此强解在之后的时间内也将以指数方式衰退。

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In the case of nonuniform decay in the energy space, we derive explicit polynomial decay estimates valid for regular initial data.

在能量空间中，当梁的能量非一致衰减时，由初始条件得到了梁的能量多项式衰减估计。

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After synthetically calculating the fragment windward area and the measurement data of the speed, we can obtain the initial velocity of the shot and the decay coefficient of the fragment.

对获得的典型弹片迎风面积和弹片测速数据综合计算，就可获得弹丸初速及弹片衰减系数。

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