The least square approach is applied to get regressioncurves and a design plan is proposed on the basis of the regressioncurves.
应用最小二乘法求出回归曲线 ，并根据回归曲线提出设计方案 。
2
The frame 's fatigue strength distribution has been obtained by calculating the experimental result of material fatigue test and has been described by means of two regressioncurves.
构件的疲劳强度分布是由材料疲劳强度试验的结果经统计处理后，用两条拟合曲线来描述的。
3
In this model, the general characters of the regressioncurves can be displayed, and the individual characters of the curves as well as the relationship between the curves can be showed.