Search Results for author: Luís A. Alexandre

Found 23 papers, 8 papers with code

Music to Dance as Language Translation using Sequence Models

1 code implementation22 Mar 2024 André Correia, Luís A. Alexandre

We train our method on AIST++ and PhantomDance data sets to teach a robotic arm to dance, but our method can be applied to a full humanoid robot.

Translation

Robust Energy Consumption Prediction with a Missing Value-Resilient Metaheuristic-based Neural Network in Mobile App Development

no code implementations21 Sep 2023 Seyed Jalaleddin Mousavirad, Luís A. Alexandre

Energy consumption is a fundamental concern in mobile application development, bearing substantial significance for both developers and end-users.

Decision Making

A Metaheuristic-based Machine Learning Approach for Energy Prediction in Mobile App Development

no code implementations16 Jun 2023 Seyed Jalaleddin Mousavirad, Luís A. Alexandre

Energy consumption plays a vital role in mobile App development for developers and end-users, and it is considered one of the most crucial factors for purchasing a smartphone.

Are Neural Architecture Search Benchmarks Well Designed? A Deeper Look Into Operation Importance

1 code implementation29 Mar 2023 Vasco Lopes, Bruno Degardin, Luís A. Alexandre

We found that only a subset of the operation pool is required to generate architectures close to the upper-bound of the performance range.

Neural Architecture Search

A Survey of Demonstration Learning

no code implementations20 Mar 2023 André Correia, Luís A. Alexandre

This paper provides a survey of demonstration learning, where we formally introduce the demonstration problem along with its main challenges and provide a comprehensive overview of the process of learning from demonstrations from the creation of the demonstration data set, to learning methods from demonstrations, and optimization by combining demonstration learning with different machine learning methods.

Reinforcement Learning (RL)

Hierarchical Decision Transformer

no code implementations21 Sep 2022 André Correia, Luís A. Alexandre

Our method outperforms the baselines in eight out of ten tasks of varied horizons and reward frequencies without prior task knowledge, showing the advantages of the hierarchical model approach for learning from demonstrations using a sequence model.

D4RL reinforcement-learning +1

Energy-Aware JPEG Image Compression: A Multi-Objective Approach

1 code implementation9 Sep 2022 Seyed Jalaleddin Mousavirad, Luís A. Alexandre

Also, two Pareto-based methods, including a non-dominated sorting genetic algorithm (NSGA-II) and a reference-point-based NSGA-II (NSGA-III) are used for the embedding scheme, and two Pareto-based algorithms, EnNSGAII and EnNSGAIII, are presented.

Image Compression

Guided Evolutionary Neural Architecture Search With Efficient Performance Estimation

no code implementations22 Jul 2022 Vasco Lopes, Miguel Santos, Bruno Degardin, Luís A. Alexandre

GEA guides the evolution by exploring the search space by generating and evaluating several architectures in each generation at initialisation stage using a zero-proxy estimator, where only the highest-scoring architecture is trained and kept for the next generation.

Neural Architecture Search

Towards Less Constrained Macro-Neural Architecture Search

1 code implementation10 Mar 2022 Vasco Lopes, Luís A. Alexandre

In this paper, we propose LCMNAS, a method that pushes NAS to less constrained search spaces by performing macro-search without relying on pre-defined heuristics or bounded search spaces.

Neural Architecture Search

Contrastive Learning from Demonstrations

no code implementations30 Jan 2022 André Correia, Luís A. Alexandre

This paper presents a framework for learning visual representations from unlabeled video demonstrations captured from multiple viewpoints.

Contrastive Learning reinforcement-learning +2

MPF6D: Masked Pyramid Fusion 6D Pose Estimation

no code implementations17 Nov 2021 Nuno Pereira, Luís A. Alexandre

We present a new method to estimate the 6D pose of objects that improves upon the accuracy of current proposals and can still be used in real-time.

6D Pose Estimation Robotic Grasping +1

Guided Evolution for Neural Architecture Search

1 code implementation28 Oct 2021 Vasco Lopes, Miguel Santos, Bruno Degardin, Luís A. Alexandre

The rationale behind G-EA, is to explore the search space by generating and evaluating several architectures in each generation at initialization stage using a zero-proxy estimator, where only the highest-scoring network is trained and kept for the next generation.

Neural Architecture Search

An AutoML-based Approach to Multimodal Image Sentiment Analysis

no code implementations16 Feb 2021 Vasco Lopes, António Gaspar, Luís A. Alexandre, João Cordeiro

Sentiment analysis is a research topic focused on analysing data to extract information related to the sentiment that it causes.

AutoML Marketing +2

EPE-NAS: Efficient Performance Estimation Without Training for Neural Architecture Search

2 code implementations16 Feb 2021 Vasco Lopes, Saeid Alirezazadeh, Luís A. Alexandre

In this paper, we propose EPE-NAS, an efficient performance estimation strategy, that mitigates the problem of evaluating networks, by scoring untrained networks and creating a correlation with their trained performance.

Neural Architecture Search

Improving Makespan in Dynamic Task Scheduling for Cloud Robotic Systems with Time Window Constraints

no code implementations7 Dec 2020 Saeid Alirezazadeh, Luís A. Alexandre

Load balancing allocation and scheduling ensures that the time between when the first node completes its scheduled tasks and when all other nodes complete their scheduled tasks is as short as possible.

Robotics

Auto-Classifier: A Robust Defect Detector Based on an AutoML Head

1 code implementation3 Sep 2020 Vasco Lopes, Luís A. Alexandre

The dominant approach for surface defect detection is the use of hand-crafted feature-based methods.

AutoML Defect Detection

HMCNAS: Neural Architecture Search using Hidden Markov Chains and Bayesian Optimization

no code implementations31 Jul 2020 Vasco Lopes, Luís A. Alexandre

Neural Architecture Search has achieved state-of-the-art performance in a variety of tasks, out-performing human-designed networks.

Bayesian Optimization Neural Architecture Search

MaskedFusion: Mask-based 6D Object Pose Estimation

1 code implementation18 Nov 2019 Nuno Pereira, Luís A. Alexandre

MaskedFusion is a framework to estimate the 6D pose of objects using RGB-D data, with an architecture that leverages multiple sub-tasks in a pipeline to achieve accurate 6D poses.

6D Pose Estimation 6D Pose Estimation using RGBD +1

An Overview of Blockchain Integration with Robotics and Artificial Intelligence

no code implementations30 Sep 2018 Vasco Lopes, Luís A. Alexandre

Blockchain technology is growing everyday at a fast-passed rhythm and it's possible to integrate it with many systems, namely Robotics with AI services.

SeNA-CNN: Overcoming Catastrophic Forgetting in Convolutional Neural Networks by Selective Network Augmentation

no code implementations22 Feb 2018 Abel S. Zacarias, Luís A. Alexandre

Lifelong learning aims to develop machine learning systems that can learn new tasks while preserving the performance on previous learned tasks.

BIG-bench Machine Learning

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