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- W3168576836 abstract "This article develops a novel stochastic tree ensemble method for nonlinear regression, referred to as accelerated Bayesian additive regression trees, or XBART. By combining regularization and stochastic search strategies from Bayesian modeling with computationally efficient techniques from recursive partitioning algorithms, XBART attains state-of-the-art performance at prediction and function estimation. Simulation studies demonstrate that XBART provides accurate point-wise estimates of the mean function and does so faster than popular alternatives, such as BART, XGBoost, and neural networks (using Keras) on a variety of test functions. Additionally, it is demonstrated that using XBART to initialize the standard BART MCMC algorithm considerably improves credible interval coverage and reduces total run-time. Finally, two basic theoretical results are established: the single tree version of the model is asymptotically consistent and the Markov chain produced by the ensemble version of the algorithm has a unique stationary distribution." @default.
- W3168576836 created "2021-06-22" @default.
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- W3168576836 date "2021-08-17" @default.
- W3168576836 modified "2023-10-07" @default.
- W3168576836 title "Stochastic Tree Ensembles for Regularized Nonlinear Regression" @default.
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- W3168576836 doi "https://doi.org/10.1080/01621459.2021.1942012" @default.
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