It is deemed that with the variation of time extension, the dispersion equation should be an ellipse rather than a circle.
文章认为，在时间伸展变换的情况下，频散方程将不是一个圆，而是一个椭圆。
A simple equation is presented via the theory of inflection circle and the properties of symmetric linkage curve.
利用拐点圆概念和对称连杆曲线的特性，导出一个简单的方程序。
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。
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