This paper use experimental data to set up linear regression equation with unitary and regression straight line, to use variance analysis and related coefficient to test validity of equation.
本文利用实验数据建立一元线性回归方程；回归直线，并用方差分析法和相关系数法检验方程的有效性。
Based on the variance of circle, the variance of line is derived, and a relationship equation between the variance and the pace of POCS is set up to realize weighted POCS.
在已有圆的方差基础上，推导出直线的方差，并建立POCS迭代步长与圆和直线方差的关系式，实现加权的迭代。
In the solving process of homogeneous equation set, the operational procedure for elementary line transformation is sometimes not simple and convenient as it seems to be.
在齐次方程组求解的过程中，初等行变换的运算过程有时显得并不简便。
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