We find optimal stoppingrules by using the weak infinitesimal generator of markov process.
利用弱无穷小算子，我们找出了最优停时规则。
2
This difference was independent of the presence of statistical stoppingrules and was greatest in smaller studies.
这种差异与是否存在试验终止的统计学规则无关，并且在较小的研究中差异更大。
3
In partioular, the optimal stoppingrules of maximizing the probability of employing the best applicant and minimizing expected rank are derived respectively.