Search Results for author: Xingkang He

Found 10 papers, 2 papers with code

A Sample-Based Algorithm for Approximately Testing $r$-Robustness of a Digraph

no code implementations25 Jul 2022 Yuhao Yi, YuAn Wang, Xingkang He, Stacy Patterson, Karl H. Johansson

In this paper, we propose a sample-based algorithm to approximately test $r$-robustness of a digraph with $n$ vertices and $m$ edges.

On the Convergence of mSGD and AdaGrad for Stochastic Optimization

no code implementations ICLR 2022 Ruinan Jin, Yu Xing, Xingkang He

First, we prove that the iterates of mSGD are asymptotically convergent to a connected set of stationary points with probability one, which is more general than existing works on subsequence convergence or convergence of time averages.

Stochastic Optimization

Identification of Linear Systems with Multiplicative Noise from Multiple Trajectory Data

no code implementations30 Jun 2021 Yu Xing, Benjamin Gravell, Xingkang He, Karl Henrik Johansson, Tyler Summers

An algorithm based on the least-squares method and multiple-trajectory data is proposed for joint estimation of the nominal system matrices and the covariance matrix of the multiplicative noise.

Event-Triggered Distributed Estimation With Decaying Communication Rate

no code implementations10 Mar 2021 Xingkang He, Yu Xing, Junfeng Wu, Karl H. Johansson

We show that given the step size, adjusting the decay speed of the triggering threshold can lead to a tradeoff between the convergence rate of the estimation error and the decay speed of the communication rate.

Community Structure Recovery and Interaction Probability Estimation for Gossip Opinion Dynamics

no code implementations19 Feb 2021 Yu Xing, Xingkang He, Haitao Fang, Karl H. Johansson

The considered problem is to jointly recover the community labels of the agents and estimate interaction probabilities between the agents, based on a single trajectory of the model.

Community Detection

Power Injection Attacks in Smart Distribution Grids with Photovoltaics

no code implementations11 Nov 2020 Martin Lindström, Hampei Sasahara, Xingkang He, Henrik Sandberg, Karl Henrik Johansson

We study the worst-case attack strategy of a power injection attack against the physical layer of a smart distribution grid with a high penetration of photovoltaic resources.

Privacy Preserving Set-Based Estimation Using Partially Homomorphic Encryption

1 code implementation19 Oct 2020 Amr Alanwar, Victor Gassmann, Xingkang He, Hazem Said, Henrik Sandberg, Karl Henrik Johansson, Matthias Althoff

The set-based estimation has gained a lot of attention due to its ability to guarantee state enclosures for safety-critical systems.

Cryptography and Security Robotics

How to Secure Distributed Filters Under Sensor Attacks

no code implementations11 Apr 2020 Xingkang He, Xiaoqiang Ren, Henrik Sandberg, Karl H. Johansson

The resilience of the secured filter with detection is verified by an explicit relationship between the upper bound of the estimation error and the number of detected attacked sensors.

Linear System Identification Under Multiplicative Noise from Multiple Trajectory Data

1 code implementation16 Feb 2020 Yu Xing, Ben Gravell, Xingkang He, Karl Henrik Johansson, Tyler Summers

The study of multiplicative noise models has a long history in control theory but is re-emerging in the context of complex networked systems and systems with learning-based control.

Distributed Design of Robust Kalman Filters over Corrupted Channels

no code implementations29 Jun 2019 Xingkang He, Karl Henrik Johansson, Haitao Fang

We study distributed filtering for a class of uncertain systems over corrupted communication channels.

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