Stochastic gradient Hamiltonian Monte Carlo with variance reduction for Bayesian inference

• Main Authors: LI, Zhize, ZHANG, Tianyi, CHENG, Shuyu, ZHU, Jun, LI, Jian
• 格式: text
• 語言: English
• 出版: Institutional Knowledge at Singapore Management University 2019
• 主題: Hamiltonian Monte Carlo; Variance reduction; Bayesian inference; Databases and Information Systems
• 在線閱讀: https://ink.library.smu.edu.sg/sis_research/8689; https://ink.library.smu.edu.sg/context/sis_research/article/9692/viewcontent/ML19_vrhmc.pdf

Gradient-based Monte Carlo sampling algorithms, like Langevin dynamics and Hamiltonian Monte Carlo, are important methods for Bayesian inference. In large-scale settings, full-gradients are not affordable and thus stochastic gradients evaluated on mini-batches are used as a replacement. In order to reduce the high variance of noisy stochastic gradients, Dubey et al. (in: Advances in neural information processing systems, pp 1154–1162, 2016) applied the standard variance reduction technique on stochastic gradient Langevin dynamics and obtained both theoretical and experimental improvements. In this paper, we apply the variance reduction tricks on Hamiltonian Monte Carlo and achieve better theoretical convergence results compared with the variance-reduced Langevin dynamics. Moreover, we apply the symmetric splitting scheme in our variance-reduced Hamiltonian Monte Carlo algorithms to further improve the theoretical results. The experimental results are also consistent with the theoretical results. As our experiment shows, variance-reduced Hamiltonian Monte Carlo demonstrates better performance than variance-reduced Langevin dynamics in Bayesian regression and classification tasks on real-world datasets.