Search Results for author: Stefan Werner

Found 19 papers, 2 papers with code

Analysis of a Reduced-Communication Diffusion LMS Algorithm

no code implementations25 Aug 2014 Reza Arablouei, Stefan Werner, Kutluyıl Doğançay, Yih-Fang Huang

In diffusion-based algorithms for adaptive distributed estimation, each node of an adaptive network estimates a target parameter vector by creating an intermediate estimate and then combining the intermediate estimates available within its closed neighborhood.

Recursive Total Least-Squares Algorithm Based on Inverse Power Method and Dichotomous Coordinate-Descent Iterations

no code implementations25 Aug 2014 Reza Arablouei, Kutluyıl Doğançay, Stefan Werner

We develop a recursive total least-squares (RTLS) algorithm for errors-in-variables system identification utilizing the inverse power method and the dichotomous coordinate-descent (DCD) iterations.

Run2Survive: A Decision-theoretic Approach to Algorithm Selection based on Survival Analysis

1 code implementation6 Jul 2020 Alexander Tornede, Marcel Wever, Stefan Werner, Felix Mohr, Eyke Hüllermeier

In an extensive experimental study with the standard benchmark ASlib, our approach is shown to be highly competitive and in many cases even superior to state-of-the-art AS approaches.

Survival Analysis

On Stability and Convergence of Distributed Filters

no code implementations22 Feb 2021 Sayed Pouria Talebi, Stefan Werner, Vijay Gupta, Yih-Fang Huang

The paradigm of stability and convergence in distributed filtering is revised in this manuscript.

Communication-Efficient Online Federated Learning Framework for Nonlinear Regression

no code implementations13 Oct 2021 Vinay Chakravarthi Gogineni, Stefan Werner, Yih-Fang Huang, Anthony Kuh

As a solution, this paper presents a partial-sharing-based online federated learning framework (PSO-Fed) that enables clients to update their local models using continuous streaming data and share only portions of those updated models with the server.

Federated Learning regression

Resource-Aware Asynchronous Online Federated Learning for Nonlinear Regression

no code implementations27 Nov 2021 Francois Gauthier, Vinay Chakravarthi Gogineni, Stefan Werner, Yih-Fang Huang, Anthony Kuh

In this manner, we reduce the communication load of the participants and, therefore, render participation in the learning task more accessible.

Federated Learning regression

Decentralized Optimization with Distributed Features and Non-Smooth Objective Functions

no code implementations23 Aug 2022 Cristiano Gratton, Naveen K. D. Venkategowda, Reza Arablouei, Stefan Werner

We develop a new consensus-based distributed algorithm for solving learning problems with feature partitioning and non-smooth convex objective functions.

Distributed Optimization

Learning a model is paramount for sample efficiency in reinforcement learning control of PDEs

1 code implementation14 Feb 2023 Stefan Werner, Sebastian Peitz

The goal of this paper is to make a strong point for the usage of dynamical models when using reinforcement learning (RL) for feedback control of dynamical systems governed by partial differential equations (PDEs).

Reinforcement Learning (RL)

Asynchronous Online Federated Learning with Reduced Communication Requirements

no code implementations27 Mar 2023 Francois Gauthier, Vinay Chakravarthi Gogineni, Stefan Werner, Yih-Fang Huang, Anthony Kuh

The simulations reveal that in asynchronous settings, the proposed PAO-Fed is able to achieve the same convergence properties as that of the online federated stochastic gradient while reducing the communication overhead by 98 percent.

Federated Learning

Personalized Graph Federated Learning with Differential Privacy

no code implementations10 Jun 2023 Francois Gauthier, Vinay Chakravarthi Gogineni, Stefan Werner, Yih-Fang Huang, Anthony Kuh

Further, our analysis shows that the algorithm ensures local differential privacy for all clients in terms of zero-concentrated differential privacy.

Federated Learning Privacy Preserving

Distributed Filtering Design with Enhanced Resilience to Coordinated Byzantine Attacks

no code implementations26 Jul 2023 Ashkan Moradi, Vinay Chakravarthi Gogineni, Naveen K. D. Venkategowda, Stefan Werner

Numerical results demonstrate the accuracy of the proposed BR-CDF and its robustness against Byzantine attacks.

Robust Networked Federated Learning for Localization

no code implementations31 Aug 2023 Reza Mirzaeifard, Naveen K. D. Venkategowda, Stefan Werner

This paper addresses the problem of localization, which is inherently non-convex and non-smooth in a federated setting where the data is distributed across a multitude of devices.

Computational Efficiency Federated Learning

Moreau Envelope ADMM for Decentralized Weakly Convex Optimization

no code implementations31 Aug 2023 Reza Mirzaeifard, Naveen K. D. Venkategowda, Alexander Jung, Stefan Werner

This paper proposes a proximal variant of the alternating direction method of multipliers (ADMM) for distributed optimization.

Distributed Optimization

Smoothing ADMM for Sparse-Penalized Quantile Regression with Non-Convex Penalties

no code implementations4 Sep 2023 Reza Mirzaeifard, Naveen K. D. Venkategowda, Vinay Chakravarthi Gogineni, Stefan Werner

This paper investigates quantile regression in the presence of non-convex and non-smooth sparse penalties, such as the minimax concave penalty (MCP) and smoothly clipped absolute deviation (SCAD).

regression

Analyzing the Impact of Partial Sharing on the Resilience of Online Federated Learning Against Model Poisoning Attacks

no code implementations19 Mar 2024 Ehsan Lari, Vinay Chakravarthi Gogineni, Reza Arablouei, Stefan Werner

PSO-Fed reduces the communication load by enabling clients to exchange only a fraction of their model estimates with the server at each update round.

Federated Learning Model Poisoning

Distributed Maximum Consensus over Noisy Links

no code implementations27 Mar 2024 Ehsan Lari, Reza Arablouei, Naveen K. D. Venkategowda, Stefan Werner

We introduce a distributed algorithm, termed noise-robust distributed maximum consensus (RD-MC), for estimating the maximum value within a multi-agent network in the presence of noisy communication links.

Distributed Optimization

Privacy-Preserving Distributed Nonnegative Matrix Factorization

no code implementations27 Mar 2024 Ehsan Lari, Reza Arablouei, Stefan Werner

To address this, we propose a privacy-preserving algorithm for fully-distributed NMF that decomposes a distributed large data matrix into left and right matrix factors while safeguarding each agent's local data privacy.

Privacy Preserving

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