Search Results for author: Vitor Cerqueira

Found 14 papers, 10 papers with code

Time Series Data Augmentation as an Imbalanced Learning Problem

1 code implementation29 Apr 2024 Vitor Cerqueira, Nuno Moniz, Ricardo Inácio, Carlos Soares

We use these techniques to create synthetic time series observations and improve the accuracy of forecasting models.

Data Augmentation Time Series

On-the-fly Data Augmentation for Forecasting with Deep Learning

no code implementations25 Apr 2024 Vitor Cerqueira, Moisés Santos, Yassine Baghoussi, Carlos Soares

We validated the proposed approach using a state-of-the-art deep learning forecasting method and 8 benchmark datasets containing a total of 75797 time series.

Data Augmentation Synthetic Data Generation +1

Multi-output Ensembles for Multi-step Forecasting

1 code implementation26 Jun 2023 Vitor Cerqueira, Luis Torgo

On the other hand, the literature regarding the application of dynamic ensembles for multi-step ahead forecasting is scarce.

Time Series

Automated Imbalanced Classification via Layered Learning

no code implementations5 May 2022 Vitor Cerqueira, Luis Torgo, Paula Branco, Colin Bellinger

The main contribution of our work is a new method called ICLL for tackling IBC tasks which is not based on resampling training observations.

Binary Classification Classification +2

AutoFITS: Automatic Feature Engineering for Irregular Time Series

1 code implementation29 Dec 2021 Pedro Costa, Vitor Cerqueira, João Vinagre

We hypothesise that, in irregular time series, the time at which each observation is collected may be helpful to summarise the dynamics of the data and improve forecasting performance.

Feature Engineering Irregular Time Series +2

Model Compression for Dynamic Forecast Combination

1 code implementation5 Apr 2021 Vitor Cerqueira, Luis Torgo, Carlos Soares, Albert Bifet

In this paper, we leverage the idea of model compression to address this problem in time series forecasting tasks.

Model Compression Time Series +1

Model Selection for Time Series Forecasting: Empirical Analysis of Different Estimators

1 code implementation1 Apr 2021 Vitor Cerqueira, Luis Torgo, Carlos Soares

We address this issue and compare a set of estimation methods for model selection in time series forecasting tasks.

Model Selection Time Series +1

STUDD: A Student-Teacher Method for Unsupervised Concept Drift Detection

1 code implementation1 Mar 2021 Vitor Cerqueira, Heitor Murilo Gomes, Albert Bifet, Luis Torgo

In a set of experiments using 19 data streams, we show that the proposed approach can detect concept drift and present a competitive behaviour relative to the state of the art approaches.

VEST: Automatic Feature Engineering for Forecasting

3 code implementations14 Oct 2020 Vitor Cerqueira, Nuno Moniz, Carlos Soares

Time series forecasting is a challenging task with applications in a wide range of domains.

Feature Engineering feature selection +3

Machine Learning vs Statistical Methods for Time Series Forecasting: Size Matters

1 code implementation29 Sep 2019 Vitor Cerqueira, Luis Torgo, Carlos Soares

Using a learning curve method, our results suggest that machine learning methods improve their relative predictive performance as the sample size grows.

BIG-bench Machine Learning Time Series +2

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