When determining empirical formula with test method, estimation value of estimated parameter in regression equation which is obtained with least square method always is a long number.
用实验方法确定经验公式时，回归方程中用最小二乘方法求得的待估参数的估计值往往是一个很长的数。
We designed the flight program for solid launch vehicles, resolved the control parameter of ascent trajectory with modified Newton iterative method, and deduced the iterative formula.
设计了固体运载火箭上升段飞行程序，应用修正牛顿迭代法求解上升段弹道控制参数，推导了迭代算法公式。
The present paper describes the rapid determining method of profile modified straight bevel gear. The method is not only easy in parameter measure but also brief in formula calculation.
本文论述了变位直、斜圆柱齿轮快速测算法。这种测算法不仅测量参数简便，而且计算公式也简单。
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