no code implementations • 14 Jul 2023 • Houshuang Chen, Yuchen He, Chihao Zhang
For a vector $\mathbf{m}=(m_1,\dots, m_K)\in \mathbb{N}^K$, an instance of $\mathbf{m}$-MAB indicates that the arms are partitioned into $K$ groups and the $i$-th group contains $m_i$ arms.
no code implementations • 30 May 2022 • Yuchen He, Chihao Zhang
The problem of bandit with graph feedback generalizes both the multi-armed bandit (MAB) problem and the learning with expert advice problem by encoding in a directed graph how the loss vector can be observed in each round of the game.
1 code implementation • 1 Sep 2021 • Chihao Zhang, Yiling Elaine Chen, Shihua Zhang, Jingyi Jessica Li
While practitioners commonly combine ambiguous outcome labels for all data points (instances) in an ad hoc way to improve the accuracy of multi-class classification, there lacks a principled approach to guide the label combination for all data points by any optimality criterion.
no code implementations • NeurIPS 2021 • Houshuang Chen, Zengfeng Huang, Shuai Li, Chihao Zhang
We propose the notions of the fractional weak domination number $\delta^*$ and the $k$-packing independence number capturing upper bound and lower bound for the regret respectively.
2 code implementations • 10 Feb 2020 • Chihao Zhang, Yang Yang, Wei zhang, Shihua Zhang
Such a method should scale up well, model the heterogeneous noise, and address the communication issue in a distributed system.
no code implementations • 25 Nov 2019 • Chihao Zhang, Kuo Gai, Shihua Zhang
However, most of the existing methods only assume that the noise is correlated in the feature space while there may exist two-way structured noise.
no code implementations • 9 Dec 2017 • Chihao Zhang, Shihua Zhang
A few of matrix decomposition methods have been extended for such multi-view data integration and pattern discovery.