91 citations · 481 across the 44 of their papers we have counts for
46 papers
Split-Spectrum Based Distributed State Estimation for Linear Systems
Lili Wang, Ji Liu, Brian B. O. Anderson +1
This paper studies a distributed state estimation problem for both continuous- and discrete-time linear systems. A simply structured distributed estimator (comprising interconnecte…
A Hybrid Observer for Estimating the State of a Distributed Linear System
Lili Wang, Ji Liu, A. Stephen Morse
A hybrid observer is described for estimating the state of a system of the form dot x=Ax, y_i=C_ix, i=1,...,m. The system's state x is simultaneously estimated by m agents assuming…
Modeling and Analysis of a Coupled SIS Bi-Virus Model
Sebin Gracy, Philip E. Paré, Ji Liu +4
The paper deals with the setting where two viruses (say virus 1 and virus 2) coexist in a population, and they are not necessarily mutually exclusive, in the sense that infection d…
Convergence and Equilibria Analysis of a Networked Bivirus Epidemic Model
Mengbin Ye, Brian D. O. Anderson, Ji Liu
This paper studies a networked bivirus model, in which two competing viruses spread across a network of interconnected populations; each node represents a population with a large n…
Decentralized Upper Confidence Bound Algorithms for Homogeneous Multi-Agent Multi-Armed Bandits
Jingxuan Zhu, Ethan Mulle, Christopher S. Smith +2
This paper studies a decentralized homogeneous multi-armed bandit problem in a multi-agent network. The problem is simultaneously solved by agents assuming they face a common s…
PASTO: Strategic Parameter Optimization in Recommendation Systems -- Probabilistic is Better than Deterministic
Weicong Ding, Hanlin Tang, Jingshuo Feng +17
Real-world recommendation systems often consist of two phases. In the first phase, multiple predictive models produce the probability of different immediate user actions. In the se…
Reputation and Pricing Dynamics in Online Markets
Qian Ma, Jianwei Huang, Tamer Başar +2
We study the economic interactions among sellers and buyers in online markets. In such markets, buyers have limited information about the product quality, but can observe the selle…
On a Network SIS Epidemic Model with Cooperative and Antagonistic Opinion Dynamics
Baike She, Ji Liu, Shreyas Sundaram +1
We propose a mathematical model to study coupled epidemic and opinion dynamics in a network of communities. Our model captures SIS epidemic dynamics whose evolution is dependent on…
Gossip over Holonomic Graphs
Xudong Chen, Mohamed-Ali Belabbas, Ji Liu
A gossip process is an iterative process in a multi-agent system where only two neighboring agents communicate at each iteration and update their states. The neighboring condition…
Federated Bandit: A Gossiping Approach
Zhaowei Zhu, Jingxuan Zhu, Ji Liu +1
In this paper, we study \emph{Federated Bandit}, a decentralized Multi-Armed Bandit problem with a set of agents, who can only communicate their local data with neighbors descr…
On Spectral Properties of Signed Laplacians with Connections to Eventual Positivity
Wei Chen, Dan Wang, Ji Liu +5
Signed graphs have appeared in a broad variety of applications, ranging from social networks to biological networks, from distributed control and computation to power systems. In t…
Controlling a Networked SIS Model via a Single Input over Undirected Graphs
Dan Wang, Ji Liu, Philip E. Paré +4
This paper formulates and studies the problem of controlling a networked SIS model using a single input in which the network structure is described by a connected undirected graph.…
A Private and Finite-Time Algorithm for Solving a Distributed System of Linear Equations
Shripad Gade, Ji Liu, Nitin H. Vaidya
This paper studies a system of linear equations, denoted as , which is horizontally partitioned (rows in and ) and stored over a network of devices connected in…
A Distributed Observer for a Continuous-Time Linear System with time-varying network
Lili Wang, Ji Liu, A. Stephen Morse
A simply structured distributed observer is described for estimating the state of a continuous-time, jointly observable, input-free, linear system whose sensed outputs are distribu…
Analysis of a Nonlinear Opinion Dynamics Model with Biased Assimilation
Weiguo Xia, Mengbin Ye, Ji Liu +2
This paper analyzes a nonlinear opinion dynamics model which generalizes the DeGroot model by introducing a bias parameter for each individual. The original DeGroot model is recove…
Applications of the Poincaré--Hopf Theorem: Epidemic Models and Lotka--Volterra Systems
Mengbin Ye, Ji Liu, Brian D. O. Anderson +1
This paper focuses on the equilibria and their regions of attraction for continuous-time nonlinear dynamical systems. The classical Poincaré--Hopf Theorem from differential topolog…
Maxwells Demon: Controlling Entropy via Discrete Ricci Flow Over Networks
Romeil Sandhu, Ji Liu
In this work, we propose to utilize discrete graph Ricci flow to alter network entropy through feedback control. Given such feedback input can reverse entropic changes, we adapt th…
An Interactive Control Approach to 3D Shape Reconstruction
Bipul Islam, Ji Liu, Anthony Yezzi +1
The ability to accurately reconstruct the 3D facets of a scene is one of the key problems in robotic vision. However, even with recent advances with machine learning, there is no h…
A Communication-Efficient Multi-Agent Actor-Critic Algorithm for Distributed Reinforcement Learning
Yixuan Lin, Kaiqing Zhang, Zhuoran Yang +4
This paper considers a distributed reinforcement learning problem in which a network of multiple agents aim to cooperatively maximize the globally averaged return through communica…
A Distributed Observer for a Discrete-Time Linear System
Lili Wang, Ji Liu, A. Stephen Morse +1
A simply structured distributed observer is described for estimating the state of a discrete-time, jointly observable, input-free, linear system whose sensed outputs are distribute…
A Multi-Agent Off-Policy Actor-Critic Algorithm for Distributed Reinforcement Learning
Wesley Suttle, Zhuoran Yang, Kaiqing Zhang +3
This paper extends off-policy reinforcement learning to the multi-agent case in which a set of networked agents communicating with their neighbors according to a time-varying graph…
Analysis and Control of a Continuous-Time Bi-Virus Model
Ji Liu, Philip E. Pare, Angelia Nedich +3
This paper studies a distributed continuous-time bi-virus model in which two competing viruses spread over a network consisting of multiple groups of individuals. Limiting behavior…
Consensus and Disagreement of Heterogeneous Belief Systems in Influence Networks
Mengbin Ye, Ji Liu, Lili Wang +2
Recently, an opinion dynamics model has been proposed to describe a network of individuals discussing a set of logically interdependent topics. For each individual, the set of topi…
Distributed Learning of Average Belief Over Networks Using Sequential Observations
Kaiqing Zhang, Yang Liu, Ji Liu +2
This paper addresses the problem of distributed learning of average belief with sequential observations, in which a network of agents aim to reach a consensus on the average…