circular calculation的用法和样例：
例句
- Base on the calculation of numerical value, an iterating method on calculating quick initialization is put forward.
基于数值计算提出了一种计算快速起步的迭代方法，分析并采用迭代方法进行了起步计算。 - Secondly, the method applies a linear iterative procedure in calculation and the SVD is used as a main tool, avoiding complex nonlinear optimization processes.
实现过程是以奇异值分解为基本工具的分步线性迭代计算，避免了传统射影重建方法复杂的非线性优化环节。
