第三，一个迭代或者阶段的退出标准不完全。
Third, the "exit criteria" for an iteration or phase is not sufficient.
把不完全乔里斯基预条件技术应用到其积分方程，极大地改善了其谱特性，加速了矩阵方程的迭代收敛。
The IC precondition technique is applied to the integral equation to improve the spectral properties and accelerate the iteration speed of matrix equation.
本文讨论EM算法的收敛性，其中EM算法是不完全数据处理中的一类重要的参数估计的迭代算法。
In this paper we discuss the convergence of the EM algorithm for iterative computation of maximum likelihood estimates when the observations can be viewed as incomplete data.
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