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A reasonable difference grid can reduce truncated error.
精心选择差分网格可以减少截断误差。
The formulas of truncated error and truncated index are given.
给出了截尾误差公式及截尾指数选择公式。
The local truncated error estimation of the approximately solution could be obtained with reasonable computational cost.
通过合理控制计算量，得到了微分方程近似解的局部截断误差的估计。
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