4 papers
Regret Lower Bound and Optimal Algorithm for High-Dimensional Contextual Linear Bandit
Ke Li, Yun Yang, Naveen N. Narisetty
In this paper, we consider the multi-armed bandit problem with high-dimensional features. First, we prove a minimax lower bound, $\mathcal{O}\big((\log d)^{\frac{α+1}{2}}T^{\frac{1…
Identifying regions of inhomogeneities in spatial processes via an M-RA and mixture priors
Marco H. Benedetti, Veronica J. Berrocal, Naveen N. Narisetty
Soils have been heralded as a hidden resource that can be leveraged to mitigate and address some of the major global environmental challenges. Specifically, the organic carbon stor…
Evaluating proxy influence in assimilated paleoclimate reconstructions -- Testing the exchangeability of two ensembles of spatial processes
Trevor Harris, Bo Li, Nathan Steiger +3
Climate field reconstructions (CFR) attempt to estimate spatiotemporal fields of climate variables in the past using climate proxies such as tree rings, ice cores, and corals. Data…
Bayesian Regularization for Graphical Models with Unequal Shrinkage
Lingrui Gan, Naveen N. Narisetty, Feng Liang
We consider a Bayesian framework for estimating a high-dimensional sparse precision matrix, in which adaptive shrinkage and sparsity are induced by a mixture of Laplace priors. Bes…