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Oct, 2018
过度参数化结合期望最大化算法的优势
Benefits of over-parameterization with EM
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Ji Xu, Daniel Hsu, Arian Maleki
TL;DR
本文研究基于过度参数化的混合高斯模型的期望最大化算法在寻找全局最优解方面的表现,理论和实验结果表明,此方法可以避免局部最优解问题。
Abstract
expectation maximization
(EM) is among the most popular algorithms for
maximum likelihood estimation
, but it is generally only guaranteed to find its stationary points of the log-likelihood objective. The goal of
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