本文考虑随机环境中一类Pólya罐模型,利用鞅方法获得了罐中球数目的分布符合中偏差原理,进而推广传统Pólya罐模型的极限定理.
In this paper,we consider some Pólya urn model in random environments.Applying the method of martingale,we obtain the moderate deviation principle for the distribution of balls in two colors.Furthermore,we extend the limit theorem for the classical urn models.