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- W2962938426 abstract "The expectation-maximization (EM) algorithm is a well-known iterative method for computing maximum likelihood estimates in a variety of statistical problems. Despite its numerous advantages, a main drawback of the EM algorithm is its frequently observed slow convergence which often hinders the application of EM algorithms in high-dimensional problems or in other complex settings. To address the need for more rapidly convergent EM algorithms, we describe a new class of acceleration schemes that build on the Anderson acceleration technique for speeding fixed-point iterations. Our approach is effective at greatly accelerating the convergence of EM algorithms and is automatically scalable to high-dimensional settings. Through the introduction of periodic algorithm restarts and a damping factor, our acceleration scheme provides faster and more robust convergence when compared to un-modified Anderson acceleration, while also improving global convergence. Crucially, our method works as an “off-the-shelf” method in that it may be directly used to accelerate any EM algorithm without relying on the use of any model-specific features or insights. Through a series of simulation studies involving five representative problems, we show that our algorithm is substantially faster than the existing state-of-art acceleration schemes. The acceleration schemes described in this paper are implemented in the R package daarem which is available from the comprehensive R archive network (https://cran.r-project.org). Supplementary materials for this article are available online." @default.
- W2962938426 created "2019-07-30" @default.
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- W2962938426 date "2019-05-28" @default.
- W2962938426 modified "2023-10-16" @default.
- W2962938426 title "Damped Anderson Acceleration With Restarts and Monotonicity Control for Accelerating EM and EM-like Algorithms" @default.
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- W2962938426 doi "https://doi.org/10.1080/10618600.2019.1594835" @default.
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