Search Results for author: Fotios Petropoulos

Found 7 papers, 3 papers with code

Probabilistic Forecast-based Portfolio Optimization of Electricity Demand at Low Aggregation Levels

no code implementations18 Apr 2023 Jungyeon Park, Estêvão Alvarenga, Jooyoung Jeon, Ran Li, Fotios Petropoulos, Hokyun Kim, Kwangwon Ahn

Using probabilistic load forecasts produced by either ARMA-GARCH models or kernel density estimation (KDE), we propose three approaches to creating a portfolio of residential households' demand: Forecast Validated, Seasonal Residual, and Seasonal Similarity.

Computational Efficiency Density Estimation +2

The future of forecasting competitions: Design attributes and principles

no code implementations9 Feb 2021 Spyros Makridakis, Chris Fry, Fotios Petropoulos, Evangelos Spiliotis

Forecasting competitions are the equivalent of laboratory experimentation widely used in physical and life sciences.

Applications

Forecast with Forecasts: Diversity Matters

no code implementations3 Dec 2020 Yanfei Kang, Wei Cao, Fotios Petropoulos, Feng Li

In this work, we suggest a change of focus from the historical data to the produced forecasts to extract features.

Computational Efficiency Meta-Learning +3

Hierarchical forecast reconciliation with machine learning

no code implementations3 Jun 2020 Evangelos Spiliotis, Mahdi Abolghasemi, Rob J. Hyndman, Fotios Petropoulos, Vassilios Assimakopoulos

First, the proposed method allows for a non-linear combination of the base forecasts, thus being more general than the linear approaches.

BIG-bench Machine Learning Decision Making

Déjà vu: forecasting with similarity

2 code implementations31 Aug 2019 Yanfei Kang, Evangelos Spiliotis, Fotios Petropoulos, Nikolaos Athiniotis, Feng Li, Vassilios Assimakopoulos

Instead of extrapolating, the future paths of the similar reference series are aggregated and serve as the basis for the forecasts of the target series.

Methodology Applications

Que será será? The uncertainty estimation of feature-based time series forecasts

2 code implementations8 Aug 2019 Xiaoqian Wang, Yanfei Kang, Fotios Petropoulos, Feng Li

In the training part, we use a collection of time series to train a model to explore how time series features affect the interval forecasting accuracy of different forecasting methods, which makes our proposed framework interpretable in terms of the contribution of each feature to the models' uncertainty prediction.

Methodology Applications Computation

The Optimised Theta Method

2 code implementations11 Mar 2015 José Augusto Fioruci, Tiago Ribeiro Pellegrini, Francisco Louzada, Fotios Petropoulos

Accurate and robust forecasting methods for univariate time series are very important when the objective is to produce estimates for a large number of time series.

Methodology 62M10

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