403 citations · 479 across the 18 of their papers we have counts for
18 papers
From Relaxed Indexability to Exact Indexability: A -Step Approach for Partially Observable Restless Bandits
Keqin Liu, Qizhen Jia
Whittle index policies offer a scalable method for restless multi-armed bandits, but under partial observability even determining the indifference subsidy at a single belief requir…
Nonlinear Bandit
Tianshuo Zheng, Ting Wu, Zhi-Hua Zhou +1
In this paper we first study the problem of generalized linear bandit (GLB) under heavy-tailed noise. The characteristics of heavy-tailed distributions are widely observed in real-…
On a determinant involving linear combinations of Legendre symbols
Keqin Liu, Zhi-Wei Sun, Li-Yuan Wang
In this paper, we prove a conjecture of the second author by evaluating the determinant $$\det\left[x + \left(\frac{i-j}p\right) + \left(\frac ip\right)y + \left(\frac jp\right)z +…
Temperature Balancing, Layer-wise Weight Analysis, and Neural Network Training
Yefan Zhou, Tianyu Pang, Keqin Liu +3
Regularization in modern machine learning is crucial, and it can take various forms in algorithmic design: training set, model family, error function, regularization terms, and opt…
General Formulation and PCL-Analysis for Restless Bandits with Limited Observability
Keqin Liu, Qizhen Jia
In this paper, we consider a general observation model for restless multi-armed bandit problems. The operation of the player is based on the past observation history that is limite…
Generalization and Alternative Proof of Two Identities Posed by Sun
Keqin Liu
We study two identities involving roots of unity and determinants of Hermitian matrices which have been recently proved by using the famous eigenvector-eigenvalue identity for norm…