1 code implementation • 12 Oct 2022 • Ruqi Zhang, Qiang Liu, Xin T. Tong
Sampling methods, as important inference and learning techniques, are typically designed for unconstrained domains.
no code implementations • 17 May 2022 • Yi Chen, Jing Dong, Xin T. Tong
Based on three different scenarios, we propose simulation-based algorithms that can utilize a small amount of outsourced data to find good initial points accordingly.
no code implementations • 6 Feb 2022 • Jing Dong, Xin T. Tong
The policy evaluation algorithm is then combined with the policy iteration algorithm to learn the optimal policy.
no code implementations • 6 Jul 2020 • Neil K. Chada, Claudia Schillings, Xin T. Tong, Simon Weissmann
One fundamental problem when solving inverse problems is how to find regularization parameters.
no code implementations • 25 Mar 2020 • Xi Chen, Qiang Liu, Xin T. Tong
One classical canon of statistics is that large models are prone to overfitting, and model selection procedures are necessary for high dimensional data.
no code implementations • 23 Jan 2020 • Jing Dong, Xin T. Tong
Gradient descent (GD) is known to converge quickly for convex objective functions, but it can be trapped at local minima.
no code implementations • 30 Apr 2019 • Xi Chen, Simon S. Du, Xin T. Tong
In this paper, using intuitions from stochastic differential equations, we provide a direct analysis for the hitting times of SGLD to the first and second order stationary points.
no code implementations • 27 Oct 2016 • Xi Chen, Jason D. Lee, Xin T. Tong, Yichen Zhang
Second, for high-dimensional linear regression, using a variant of the SGD algorithm, we construct a debiased estimator of each regression coefficient that is asymptotically normal.