Through differential operation of approaching curve function, we can obtain the data of target trace direction and trace velocity.
通过对拟合曲线函数的微分运算，得到目标航迹向与航速数据。
In the practical applications, the position and velocity of target possibly can be obtained by a single moving observation platform using measurement data.
在实际应用中，只要满足可观性原理就可以通过运动观测平台估计出目标的位置和速度。
The computed results of (residual) velocity are well consistent with the test data, and a reasonable figure of fractured concrete target is (obtained).
计算得到的弹体剩余速度同实验结果基本一致，同时得到了混凝土靶板破裂的计算图像。
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