In this paper a linear estimation problem for a stochastic process which is viewed as the output signal of a linear second-order vector difference equation driven by a white-noise input is considered.

本文考虑在白噪声输入情况下，二阶向量差分方程随机输出信号的滤波估计问题。

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The difference is that the process is wrapped by a loop that iterates across the saved vector of declared languages.

差别在于这个处理是由循环包围的，该循环迭代跨越已声明语言所保存的向量。

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Now, an important difference between curl here and curl in the plane is that now the curl of a vector field is again a vector field.

和平面上的旋度的一个重要的不同点是，这里向量场的旋度，仍然是一个向量场。

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Because the difference in the vector between two times is this vector.

因为两个不同时间点上矢量的差,就是这个矢量 ΔR

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