论述了天文定位的最优估计方法及其精度。
This paper describes an optimal estimating method for the celestial positioning and its accuracy.
基于地毯法估计分形维数，提出了图像局部分形维数的最优估计方法。
Based on the blanket method, a novel algorithm for estimating the local fractal dimension of texture images is presented in this paper.
其中一种方法是基于当前最优估计值对状态方程进行线性化。
One of the algorithms is to linearized the state equation based on the optimal estimation.
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