no code implementations • 9 Apr 2024 • Victor-Alexandru Darvariu, Stephen Hailes, Mirco Musolesi
Graphs are a natural representation for systems based on relations between connected entities.
no code implementations • 20 Oct 2023 • Victor-Alexandru Darvariu, Stephen Hailes, Mirco Musolesi
Identifying causal structure is central to many fields ranging from strategic decision-making to biology and economics.
no code implementations • 28 Feb 2023 • Syu-Ning Johnn, Victor-Alexandru Darvariu, Julia Handl, Joerg Kalcsics
ALNS is a popular metaheuristic with renowned efficiency in solving combinatorial optimisation problems.
no code implementations • 12 Sep 2022 • Victor-Alexandru Darvariu, Stephen Hailes, Mirco Musolesi
Network flow problems, which involve distributing traffic such that the underlying infrastructure is used effectively, are ubiquitous in transportation and logistics.
1 code implementation • 26 May 2022 • Christoffel Doorman, Victor-Alexandru Darvariu, Stephen Hailes, Mirco Musolesi
A key problem in network theory is how to reconfigure a graph in order to optimize a quantifiable objective.
no code implementations • 25 May 2022 • Ho Long Fung, Victor-Alexandru Darvariu, Stephen Hailes, Mirco Musolesi
An often neglected issue in multi-agent reinforcement learning (MARL) is the potential presence of unreliable agents in the environment whose deviations from expected behavior can prevent a system from accomplishing its intended tasks.
Multi-agent Reinforcement Learning reinforcement-learning +1
1 code implementation • NeurIPS 2021 • Victor-Alexandru Darvariu, Stephen Hailes, Mirco Musolesi
In particular, we define a Markov Decision Process which incrementally generates an mIS, and adopt a planning method to search for equilibria, outperforming existing methods.
no code implementations • 16 Sep 2021 • Alberto Jesu, Victor-Alexandru Darvariu, Alessandro Staffolani, Rebecca Montanari, Mirco Musolesi
The growing number of applications of Reinforcement Learning (RL) in real-world domains has led to the development of privacy-preserving techniques due to the inherently sensitive nature of data.
no code implementations • 12 Jun 2021 • Victor-Alexandru Darvariu, Stephen Hailes, Mirco Musolesi
We tackle the problem of goal-directed graph construction: given a starting graph, a budget of modifications, and a global objective function, the aim is to find a set of edges whose addition to the graph achieves the maximum improvement in the objective (e. g., communication efficiency).
1 code implementation • 12 Jun 2021 • Victor-Alexandru Darvariu, Stephen Hailes, Mirco Musolesi
Public goods games represent insightful settings for studying incentives for individual agents to make contributions that, while costly for each of them, benefit the wider society.
1 code implementation • 30 Jan 2020 • Victor-Alexandru Darvariu, Stephen Hailes, Mirco Musolesi
In this work, we formulate the construction of a graph as a decision-making process in which a central agent creates topologies by trial and error and receives rewards proportional to the value of the target objective.