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基于EM算法的Dirichlet分布的参数估计

Journal of Northeast Normal University(Natural Science Edition)(2021)

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Abstract
为了克服Dirichlet分布的传统估计算法复杂且不能保证有效性的缺陷,将基于Dirichlet分布的随机表示引入缺失数据,构造了EM算法计算参数的极大似然估计,算法简单的同时保证了估计的有效性.最后进行统计模拟,结果表明,本文提出的基于EM算法的Dirichlet分布的参数估计有很好的估计精度.
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