Search Results for author: David Camacho

Found 23 papers, 6 papers with code

AIDA-UPM at SemEval-2022 Task 5: Exploring Multimodal Late Information Fusion for Multimedia Automatic Misogyny Identification

1 code implementation SemEval (NAACL) 2022 Álvaro Huertas-García, Helena Liz, Guillermo Villar-Rodríguez, Alejandro Martín, Javier Huertas-Tato, David Camacho

The main contribution of this paper is the exploration of different late fusion methods to boost the performance of the combination based on the Transformer-based model and Convolutional Neural Networks (CNN) for text and image, respectively.

Meme Classification

Weighted strategies to guide a multi-objective evolutionary algorithm for multi-UAV mission planning

no code implementations28 Feb 2024 Cristian Ramirez-Atencia, Javier Del Ser, David Camacho

The main objective of this work is to reduce the convergence rate of the MOEA solver for multi-UAV mission planning using weighted random strategies that focus the search on potentially better regions of the solution space.

A revision on Multi-Criteria Decision Making methods for Multi-UAV Mission Planning Support

no code implementations28 Feb 2024 Cristian Ramirez-Atencia, Victor Rodriguez-Fernandez, David Camacho

In this work, a DSS consisting of ranking and filtering systems, which order and reduce the optimal solutions, has been designed.

Decision Making

An Effective Networks Intrusion Detection Approach Based on Hybrid Harris Hawks and Multi-Layer Perceptron

no code implementations21 Feb 2024 Moutaz Alazab, Ruba Abu Khurma, Pedro A. Castillo, Bilal Abu-Salih, Alejandro Martin, David Camacho

This paper proposes an Intrusion Detection System (IDS) employing the Harris Hawks Optimization algorithm (HHO) to optimize Multilayer Perceptron learning by optimizing bias and weight parameters.

Evolutionary Algorithms Intrusion Detection +1

Camouflage is all you need: Evaluating and Enhancing Language Model Robustness Against Camouflage Adversarial Attacks

no code implementations15 Feb 2024 Álvaro Huertas-García, Alejandro Martín, Javier Huertas-Tato, David Camacho

This approach effectively reduces the performance drop in encoder-only models to an average of 5% in offensive language detection and 2% in misinformation detection tasks.

Language Modelling Misinformation

Constrained multi-objective optimization for multi-UAV planning

no code implementations9 Feb 2024 Cristian Ramirez-Atencia, David Camacho

Over the last decade, developments in unmanned aerial vehicles (UAVs) has greatly increased, and they are being used in many fields including surveillance, crisis management or automated mission planning.

Management

Solving Complex Multi-UAV Mission Planning Problems using Multi-objective Genetic Algorithms

no code implementations9 Feb 2024 Cristian Ramirez-Atencia, Gema Bello-Orgaz, Maria D R-Moreno, David Camacho

Mission Planning for UAVs is the process of planning the locations and actions (loading/dropping a load, taking videos/pictures, acquiring information) for the vehicles, typically over a time period.

valid

Self-supervised Machine Learning Based Approach to Orbit Modelling Applied to Space Traffic Management

no code implementations11 Dec 2023 Emma Stevenson, Victor Rodriguez-Fernandez, Hodei Urrutxua, Vincent Morand, David Camacho

This paper presents a novel methodology for improving the performance of machine learning based space traffic management tasks through the use of a pre-trained orbit model.

Management Time Series +1

Understanding writing style in social media with a supervised contrastively pre-trained transformer

1 code implementation17 Oct 2023 Javier Huertas-Tato, Alejandro Martin, David Camacho

Additionally, we attain promising results on PAN verification challenges using a single dense layer, with our model serving as an embedding encoder.

DeepVATS: Deep Visual Analytics for Time Series

1 code implementation8 Feb 2023 Victor Rodriguez-Fernandez, David Montalvo, Francesco Piccialli, Grzegorz J. Nalepa, David Camacho

DeepVATS trains, in a self-supervised way, a masked time series autoencoder that reconstructs patches of a time series, and projects the knowledge contained in the embeddings of that model in an interactive plot, from which time series patterns and anomalies emerge and can be easily spotted.

Time Series Time Series Analysis

Countering Malicious Content Moderation Evasion in Online Social Networks: Simulation and Detection of Word Camouflage

1 code implementation27 Dec 2022 Álvaro Huertas-García, Alejandro Martín, Javier Huertas Tato, David Camacho

In response to this recent ongoing issue, this paper presents an innovative approach to address this linguistic trend in social networks through the simulation of different content evasion techniques and a multilingual Transformer model for content evasion detection.

Multilingual Named Entity Recognition named-entity-recognition +2

PART: Pre-trained Authorship Representation Transformer

1 code implementation30 Sep 2022 Javier Huertas-Tato, Alvaro Huertas-Garcia, Alejandro Martin, David Camacho

The model is evaluated on these datasets, achieving zero-shot 72. 39\% and 86. 73\% accuracy and top-5 accuracy respectively on the joint evaluation dataset when determining authorship from a set of 250 different authors.

Zero-shot Generalization

Deep learning for understanding multilabel imbalanced Chest X-ray datasets

no code implementations28 Jul 2022 Helena Liz, Javier Huertas-Tato, Manuel Sánchez-Montañés, Javier Del Ser, David Camacho

To apply these algorithms in different fields and test how the methodology works, we need to use eXplainable AI techniques.

Exploring Dimensionality Reduction Techniques in Multilingual Transformers

no code implementations18 Apr 2022 Álvaro Huertas-García, Alejandro Martín, Javier Huertas-Tato, David Camacho

The results of this study will significantly contribute to the understanding of how different tuning approaches affect performance on semantic-aware tasks and how dimensional reduction techniques deal with the high-dimensional embeddings computed for the STS task and their potential for highly demanding NLP tasks

Dimensionality Reduction feature selection +2

BERTuit: Understanding Spanish language in Twitter through a native transformer

no code implementations7 Apr 2022 Javier Huertas-Tato, Alejandro Martin, David Camacho

Our motivation is to provide a powerful resource to better understand Spanish Twitter and to be used on applications focused on this social network, with special emphasis on solutions devoted to tackle the spreading of misinformation in this platform.

Misinformation

SILT: Efficient transformer training for inter-lingual inference

no code implementations17 Mar 2021 Javier Huertas-Tato, Alejandro Martín, David Camacho

In this paper, we propose a new architecture called Siamese Inter-Lingual Transformer (SILT), to efficiently align multilingual embeddings for Natural Language Inference, allowing for unmatched language pairs to be processed.

Cross-Lingual Natural Language Inference Question Answering

Fusing CNNs and statistical indicators to improve image classification

1 code implementation20 Dec 2020 Javier Huertas-Tato, Alejandro Martín, Julián Fierrez, David Camacho

In this paper, an ensemble method is proposed for accurate image classification, fusing automatically detected features through Convolutional Neural Network architectures with a set of manually defined statistical indicators.

Classification General Classification +1

Ensembles of Convolutional Neural Networks models for pediatric pneumonia diagnosis

no code implementations29 Sep 2020 Helena Liz, Manuel Sánchez-Montañés, Alfredo Tagarro, Sara Domínguez-Rodríguez, Ron Dagan, David Camacho

However, the usability of these systems is limited in medicine due to the lack of interpretability, because of these models cannot be used to generate an understandable explanation (from a human-based perspective), about how they have reached those results.

Explainable artificial intelligence Explainable Artificial Intelligence (XAI) +1

sKPNSGA-II: Knee point based MOEA with self-adaptive angle for Mission Planning Problems

no code implementations20 Feb 2020 Cristian Ramirez-Atencia, Sanaz Mostaghim, David Camacho

Nevertheless, some problems have many objectives which lead to a large number of non-dominated solutions obtained by the optimization algorithms.

Evolutionary Algorithms

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