在应用裂纹柔度法计算残余应力时，插值函数及其阶数的选择对计算结果的精确性有着较大的影响。
In the evaluation of the residual stress by the crack compliance method, different interpolation functions and their fit order had great effect on the calculation results.
本文给出了在预定精确度下用迭代法计算算术平方根的方法，并分析了迭代的误差，给出了预定精确度下初始值的一个选取范围。
This paper gives a method to calculate the arithmetic square root by iteration with given accuracy, analyses the iteration error and provides a selected range of initial value with the given accuracy.
由于这种局限性的存在，而造成UL列式法的收敛值有时与精确解有较大的偏差。
This limitation sometimes causes much deviation between convergence of ul formulation and the exact solution.
作者同时发现，“精确法”计算的反应谱值与实际值相比一般是偏小的。
At the same time, it is found that the values of the exact computation method are smaller than the actual values.
这种方法采用了分析法和数值法，以便得到在不同条件下更精确的费率期权值。
This method utilised analytical solutions and numerical techniques in order to represent to a high degree the value of options on freight rates in different situations.
作者采用加窗插值FFT，并提出逐幅谐波消去法，以便能精确地分析高次谐波。
So, the windows and interpolated FFT is developed, and the harmonic expurgation according to amplitude is put forward for high order harmonic parameters analysis in this paper.
作者采用加窗插值FFT，并提出逐幅谐波消去法，以便能精确地分析高次谐波。
So, the windows and interpolated FFT is developed, and the harmonic expurgation according to amplitude is put forward for high order harmonic parameters analysis in this paper.
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