摘要
首先推出了一阶五点数值微分公式和二阶五点数值微分公式,然后利用Taylor公式,给出了两者在中间节点x2处的截断误差渐进展开式,并利用Richardson外推算法,提高该数值微分公式的收敛阶数,得到了高精度的一阶和二阶数值微分公式。
The gradual approximate expansion formulas of one and two order five points numerical differential formula error are obtained by Taylor formula. The convergence order of one and two order five points numerical differential formula is im- proved by Richardson Extrapolation Method. High precision formulas of two order numerical differential are obtained.
出处
《军事交通学院学报》
2014年第4期93-95,共3页
Journal of Military Transportation University
