Search Results for author: Penousal Machado

Found 31 papers, 12 papers with code

Evaluation Metrics for Automated Typographic Poster Generation

1 code implementation10 Feb 2024 Sérgio M. Rebelo, J. J. Merelo, João Bicker, Penousal Machado

Computational Design approaches facilitate the generation of typographic design, but evaluating these designs remains a challenging task.

Emotion Recognition

Towards Physical Plausibility in Neuroevolution Systems

no code implementations31 Jan 2024 Gabriel Cortês, Nuno Lourenço, Penousal Machado

Even a slight reduction in power usage can lead to significant energy savings, benefiting users, companies, and the environment.

All You Need Is Sex for Diversity

no code implementations30 Mar 2023 José Maria Simões, Nuno Lourenço, Penousal Machado

Although some mechanisms of Sexual Selection have been applied to Genetic Programming in the past, the literature is scarce when it comes to mate choice.

Symbolic Regression

Context Matters: Adaptive Mutation for Grammars

1 code implementation25 Mar 2023 Pedro Carvalho, Jessica Mégane, Nuno Lourenço, Penousal Machado

This work proposes Adaptive Facilitated Mutation, a self-adaptive mutation method for Structured Grammatical Evolution (SGE), biologically inspired by the theory of facilitated variation.

Symbolic Regression

Structured mutation inspired by evolutionary theory enriches population performance and diversity

no code implementations1 Feb 2023 Stefano Tiso, Pedro Carvalho, Nuno Lourenço, Penousal Machado

Grammar-Guided Genetic Programming (GGGP) employs a variety of insights from evolutionary theory to autonomously design solutions for a given task.

Image Classification

ESSYS* Sharing #UC: An Emotion-driven Audiovisual Installation

no code implementations7 Sep 2022 Sérgio M. Rebelo, Mariana Seiça, Pedro Martins, João Bicker, Penousal Machado

We present ESSYS* Sharing #UC, an audiovisual installation artwork that reflects upon the emotional context related to the university and the city of Coimbra, based on the data shared about them on Twitter.

Exploring Generative Adversarial Networks for Text-to-Image Generation with Evolution Strategies

1 code implementation6 Jul 2022 Victor Costa, Nuno Lourenço, João Correia, Penousal Machado

In this work, we follow a different direction by proposing the use of Covariance Matrix Adaptation Evolution Strategy to explore the latent space of Generative Adversarial Networks.

Text-to-Image Generation

Probabilistic Structured Grammatical Evolution

1 code implementation21 May 2022 Jessica Mégane, Nuno Lourenço, Penousal Machado

PSGE statistically outperformed Grammatical Evolution (GE) on all six benchmark problems studied.

Co-evolutionary Probabilistic Structured Grammatical Evolution

1 code implementation19 Apr 2022 Jessica Mégane, Nuno Lourenço, Penousal Machado

This work proposes an extension to Structured Grammatical Evolution (SGE) called Co-evolutionary Probabilistic Structured Grammatical Evolution (Co-PSGE).

On the Exploitation of Neuroevolutionary Information: Analyzing the Past for a More Efficient Future

no code implementations26 May 2021 Unai Garciarena, Nuno Lourenço, Penousal Machado, Roberto Santana, Alexander Mendiburu

Neuroevolutionary algorithms, automatic searches of neural network structures by means of evolutionary techniques, are computationally costly procedures.

Speed Benchmarking of Genetic Programming Frameworks

no code implementations25 May 2021 Francisco Baeta, João Correia, Tiago Martins, Penousal Machado

Genetic Programming (GP) is known to suffer from the burden of being computationally expensive by design.

Benchmarking

Evolving Learning Rate Optimizers for Deep Neural Networks

no code implementations23 Mar 2021 Pedro Carvalho, Nuno Lourenço, Penousal Machado

Learning Rate optimizers are a set of such techniques that search for good values of learning rates.

speech-recognition Speech Recognition

Probabilistic Grammatical Evolution

1 code implementation15 Mar 2021 Jessica Mégane, Nuno Lourenço, Penousal Machado

We evaluate the performance of PGE in two regression problems and compare it with GE and Structured Grammatical Evolution (SGE).

TensorGP -- Genetic Programming Engine in TensorFlow

1 code implementation12 Mar 2021 Francisco Baeta, João Correia, Tiago Martins, Penousal Machado

In this paper, we resort to the TensorFlow framework to investigate the benefits of applying data vectorization and fitness caching methods to domain evaluation in Genetic Programming.

Performing Creativity With Computational Tools

no code implementations9 Mar 2021 Daniel Lopes, Jéssica Parente, Pedro Silva, Licínio Roque, Penousal Machado

The introduction of new tools in people's workflow has always been promotive of new creative paths.

Computers and Society

Demonstrating the Evolution of GANs through t-SNE

no code implementations31 Jan 2021 Victor Costa, Nuno Lourenço, João Correia, Penousal Machado

Evolutionary algorithms, such as COEGAN, were recently proposed as a solution to improve the GAN training, overcoming common problems that affect the model, such as vanishing gradient and mode collapse.

Evolutionary Algorithms

Exploring the Evolution of GANs through Quality Diversity

1 code implementation13 Jul 2020 Victor Costa, Nuno Lourenço, João Correia, Penousal Machado

We compare our proposal with the original COEGAN model and with an alternative version using a global competition approach.

Evolutionary Algorithms

AutoLR: An Evolutionary Approach to Learning Rate Policies

no code implementations8 Jul 2020 Pedro Carvalho, Nuno Lourenço, Filipe Assunção, Penousal Machado

This work presents AutoLR, a framework that evolves Learning Rate Schedulers for a specific Neural Network Architecture using Structured Grammatical Evolution.

Using Skill Rating as Fitness on the Evolution of GANs

no code implementations9 Apr 2020 Victor Costa, Nuno Lourenço, João Correia, Penousal Machado

Recent works proposed the use of evolutionary algorithms on GAN training, aiming to solve these challenges and to provide an automatic way to find good models.

Evolutionary Algorithms

Incremental Evolution and Development of Deep Artificial Neural Networks

1 code implementation1 Apr 2020 Filipe Assunção, Nuno Lourenço, Bernardete Ribeiro, Penousal Machado

Despite aiding non-expert users to design and train ANNs, the vast majority of NE approaches disregard the knowledge that is gathered when solving other tasks, i. e., evolution starts from scratch for each problem, ultimately delaying the evolutionary process.

Evolution of Scikit-Learn Pipelines with Dynamic Structured Grammatical Evolution

1 code implementation1 Apr 2020 Filipe Assunção, Nuno Lourenço, Bernardete Ribeiro, Penousal Machado

The deployment of Machine Learning (ML) models is a difficult and time-consuming job that comprises a series of sequential and correlated tasks that go from the data pre-processing, and the design and extraction of features, to the choice of the ML algorithm and its parameterisation.

AutoML BIG-bench Machine Learning +1

COEGAN: Evaluating the Coevolution Effect in Generative Adversarial Networks

1 code implementation12 Dec 2019 Victor Costa, Nuno Lourenço, João Correia, Penousal Machado

COEGAN is a model that uses neuroevolution and coevolution in the GAN training algorithm to provide a more stable training method and the automatic design of neural network architectures.

Coevolution of Generative Adversarial Networks

no code implementations12 Dec 2019 Victor Costa, Nuno Lourenço, Penousal Machado

Therefore, this project proposes COEGAN, a model that combines neuroevolution and coevolution in the coordination of the GAN training algorithm.

Automatic Design of Artificial Neural Networks for Gamma-Ray Detection

no code implementations9 May 2019 Filipe Assunção, João Correia, Rúben Conceição, Mário Pimenta, Bernardo Tomé, Nuno Lourenço, Penousal Machado

The results show that the best CNN generated by Fast-DENSER++ improves by a factor of 2 when compared with the results reported by classic statistical approaches.

Fast-DENSER++: Evolving Fully-Trained Deep Artificial Neural Networks

no code implementations8 May 2019 Filipe Assunção, Nuno Lourenço, Penousal Machado, Bernardete Ribeiro

This paper proposes a new extension to Deep Evolutionary Network Structured Evolution (DENSER), called Fast-DENSER++ (F-DENSER++).

DENSER: Deep Evolutionary Network Structured Representation

17 code implementations4 Jan 2018 Filipe Assunção, Nuno Lourenço, Penousal Machado, Bernardete Ribeiro

Deep Evolutionary Network Structured Representation (DENSER) is a novel approach to automatically design Artificial Neural Networks (ANNs) using Evolutionary Computation.

Data Augmentation

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