在实验的基础上，用工程近似法推导出在四辊组合孔型轧制圆系统产品时的力能参数，建立了轧制圆型系统产品的计算机辅助孔型及优化设计。
On the base of experiments, the author deduced some power energy parameters of round bar in four roll pass system, established the computer aided roll pass design.
当用积分方程法分析桩和其它地学工程问题时，这些公式可以用作一近似的基本解。
These formulae can be used as an approximate basic solution when the integral equation method is employed for the analysis of piles and other geotechnical engineering problems.
在工程实际的框架稳定计算中，一般采用计算长度法等一阶近似计算法，由于采用了较多的假设，因此只能进行近似线性计算。
It is usually use first-order method such as effective lengths method in engineering practical stability compute. Because of much hypothesis adopted, so it can only make approximate analysis.
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