no code implementations • 9 Aug 2023 • Stefano Nolfi
Large Language Models (LLMs) are capable of displaying a wide range of abilities that are not directly connected with the task for which they are trained: predicting the next words of human-written texts.
no code implementations • 4 Aug 2022 • Jonata Tyska Carvalho, Stefano Nolfi
Exposing an Evolutionary Algorithm that is used to evolve robot controllers to variable conditions is necessary to obtain solutions which are robust and can cross the reality gap.
no code implementations • 16 May 2022 • Nicola Milano, Stefano Nolfi
In this paper we analyze the qualitative differences between evolutionary strategies and reinforcement learning algorithms by focusing on two popular state-of-the-art algorithms: the OpenAI-ES evolutionary strategy and the Proximal Policy Optimization (PPO) reinforcement learning algorithm -- the most similar methods of the two families.
no code implementations • 17 Feb 2021 • Nicola Milano, Stefano Nolfi
We demonstrate how an evolutionary algorithm can be extended with a curriculum learning process that selects automatically the environmental conditions in which the evolving agents are evaluated.
no code implementations • 23 Nov 2020 • Paolo Pagliuca, Stefano Nolfi
We introduce a method that permits to co-evolve the body and the control properties of robots.
no code implementations • 15 Sep 2020 • Nicola Milano, Stefano Nolfi
As discussed in previous studies, the efficacy of evolutionary or reinforcement learning algorithms for continuous control optimization can be enhanced by including a neural module dedicated to feature extraction trained through self-supervised methods.
no code implementations • 11 Dec 2019 • Paolo Pagliuca, Nicola Milano, Stefano Nolfi
We analyze the efficacy of modern neuro-evolutionary strategies for continuous control optimization.
no code implementations • 18 Sep 2019 • Luca Simione, Stefano Nolfi
The possibility to use competitive evolutionary algorithms to generate long-term progress is normally prevented by the convergence on limit cycle dynamics in which the evolving agents keep progressing against their current competitors by periodically rediscovering solutions adopted previously over and over again.
no code implementations • 22 Oct 2018 • Nicola Milano, Stefano Nolfi
Finally, for problems like the Paige regression in which neutrality plays a minor role, the advantage of the preferential selection of larger solutions can be extended by preferring larger solutions also among quasi-neutral alternative candidate solutions, i. e. solutions achieving slightly different performance.
no code implementations • 2 Oct 2018 • Paolo Pagliuca, Stefano Nolfi
We propose a method for evolving solutions that are robust with respect to variations of the environmental conditions (i. e. that can operate effectively in new conditions immediately, without the need to adapt to variations).
no code implementations • 12 Dec 2017 • Nicola Milano, Paolo Pagliuca, Stefano Nolfi
We show how the characteristics of the evolutionary algorithm influence the evolvability of candidate solutions, i. e. the propensity of evolving individuals to generate better solutions as a result of genetic variation.
no code implementations • 22 Oct 2017 • Nicola Milano, Jônata Tyska Carvalho, Stefano Nolfi
Previous evolutionary studies demonstrated how evaluating evolving agents in variable environmental conditions enable them to develop solutions that are robust to environmental variation.