本文给出了强停点的一个等价定义，得出了两参数鞅关于强停点的停止定理。
In this paper, We give a equal definition of strong stopping point, and obtain a stopping theorem for two-parameter martingales to strong stopping point.
围绕这两个方面给出了一些改进的参数估计算法，并用鞅的各种收敛理论对之进行了严格的数学证明。
Some improved parameter estimation algorithms are presented , their convergent properties are proved by using the martingale convergence theorem .
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