Search Results for author: Huozhi Zhou

Found 5 papers, 0 papers with code

Adversarial Linear Contextual Bandits with Graph-Structured Side Observations

no code implementations10 Dec 2020 Lingda Wang, Bingcong Li, Huozhi Zhou, Georgios B. Giannakis, Lav R. Varshney, Zhizhen Zhao

The second algorithm, \texttt{EXP3-LGC-IX}, is developed for a special class of problems, for which the regret is reduced to $\mathcal{O}(\sqrt{\alpha(G)dT\log{K}\log(KT)})$ for both directed as well as undirected feedback graphs.

Multi-Armed Bandits

Nonstationary Reinforcement Learning with Linear Function Approximation

no code implementations8 Oct 2020 Huozhi Zhou, Jinglin Chen, Lav R. Varshney, Ashish Jagmohan

We consider reinforcement learning (RL) in episodic Markov decision processes (MDPs) with linear function approximation under drifting environment.

reinforcement-learning Reinforcement Learning (RL)

Nearly Optimal Algorithms for Piecewise-Stationary Cascading Bandits

no code implementations12 Sep 2019 Lingda Wang, Huozhi Zhou, Bingcong Li, Lav R. Varshney, Zhizhen Zhao

Cascading bandit (CB) is a popular model for web search and online advertising, where an agent aims to learn the $K$ most attractive items out of a ground set of size $L$ during the interaction with a user.

A Near-Optimal Change-Detection Based Algorithm for Piecewise-Stationary Combinatorial Semi-Bandits

no code implementations27 Aug 2019 Huozhi Zhou, Lingda Wang, Lav R. Varshney, Ee-Peng Lim

Compared to the original combinatorial semi-bandit problem, our setting assumes the reward distributions of base arms may change in a piecewise-stationary manner at unknown time steps.

Change Detection Multi-Armed Bandits

$HS^2$: Active Learning over Hypergraphs

no code implementations25 Nov 2018 I Chien, Huozhi Zhou, Pan Li

We propose a hypergraph-based active learning scheme which we term $HS^2$, $HS^2$ generalizes the previously reported algorithm $S^2$ originally proposed for graph-based active learning with pointwise queries [Dasarathy et al., COLT 2015].

Active Learning

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