Search Results for author: Anastasios Doulamis

Found 26 papers, 3 papers with code

Uncertainty estimation in satellite precipitation interpolation with machine learning

no code implementations13 Nov 2023 Georgia Papacharalampous, Hristos Tyralis, Nikolaos Doulamis, Anastasios Doulamis

Compared to QR, LightGBM showed improved performance with respect to the quantile scoring rule by 11. 10%, followed by QRF (7. 96%), GRF (7. 44%), GBM (4. 64%) and QRNN (1. 73%).

Benchmarking Feature Importance +3

Ensemble learning for blending gridded satellite and gauge-measured precipitation data

no code implementations9 Jul 2023 Georgia Papacharalampous, Hristos Tyralis, Nikolaos Doulamis, Anastasios Doulamis

In this context, satellite precipitation and topography data are the predictor variables, and gauged-measured precipitation data are the dependent variables.

Ensemble Learning regression

Merging satellite and gauge-measured precipitation using LightGBM with an emphasis on extreme quantiles

no code implementations2 Feb 2023 Hristos Tyralis, Georgia Papacharalampous, Nikolaos Doulamis, Anastasios Doulamis

To improve precipitation estimates, machine learning is applied to merge rain gauge-based measurements and gridded satellite precipitation products.

Spatial Interpolation

Comparison of tree-based ensemble algorithms for merging satellite and earth-observed precipitation data at the daily time scale

no code implementations31 Dec 2022 Georgia Papacharalampous, Hristos Tyralis, Anastasios Doulamis, Nikolaos Doulamis

Still, information on which tree-based ensemble algorithm to select for correcting satellite precipitation products for the contiguous United States (US) at the daily time scale is missing from the literature.

Benchmarking regression

Comparison of machine learning algorithms for merging gridded satellite and earth-observed precipitation data

no code implementations17 Dec 2022 Georgia Papacharalampous, Hristos Tyralis, Anastasios Doulamis, Nikolaos Doulamis

To provide results that are generalizable and to contribute to the delivery of best practices, we here compare eight state-of-the-art machine learning algorithms in correcting satellite precipitation data for the entire contiguous United States and for a 15-year period.

regression

Automatic inspection of cultural monuments using deep and tensor-based learning on hyperspectral imagery

no code implementations5 Jul 2022 Ioannis N. Tzortzis, Ioannis Rallis, Konstantinos Makantasis, Anastasios Doulamis, Nikolaos Doulamis, Athanasios Voulodimos

In Cultural Heritage, hyperspectral images are commonly used since they provide extended information regarding the optical properties of materials.

ELECTRIcity: An Efficient Transformer for Non-Intrusive Load Monitoring

1 code implementation MDPI Sensors 2022 Stavros Sykiotis, Maria Kaselimi, Anastasios Doulamis, Nikolaos Doulamis

Sequence-to-sequence deep learning models have been firmly established as state-of-the-art approaches for NILM, in an attempt to identify the pattern of the appliance power consumption signal into the aggregated power signal.

Non-Intrusive Load Monitoring Unsupervised Pre-training

Evaluating the Usefulness of Unsupervised monitoring in Cultural Heritage Monuments

no code implementations2 Jul 2021 Charalampos Zafeiropoulos, Ioannis N. Tzortzis, Ioannis Rallis, Eftychios Protopapadakis, Nikolaos Doulamis, Anastasios Doulamis

In the context of this paper, we detect the level of decomposition and corrosion on the walls of Saint Nicholas fort in Rhodes utilizing hyperspectral images.

Clustering

Rank-R FNN: A Tensor-Based Learning Model for High-Order Data Classification

no code implementations11 Apr 2021 Konstantinos Makantasis, Alexandros Georgogiannis, Athanasios Voulodimos, Ioannis Georgoulas, Anastasios Doulamis, Nikolaos Doulamis

We hereby propose the Rank-R Feedforward Neural Network (FNN), a tensor-based nonlinear learning model that imposes Canonical/Polyadic decomposition on its parameters, thereby offering two core advantages compared to typical machine learning methods.

BIG-bench Machine Learning General Classification

Semi-Supervised Fine-Tuning for Deep Learning Models in Remote Sensing Applications

no code implementations30 May 2020 Eftychios Protopapadakis, Anastasios Doulamis, Nikolaos Doulamis, Evangelos Maltezos

A combinatory approach of two well-known fields: deep learning and semi supervised learning is presented, to tackle the land cover identification problem.

Space-Time Domain Tensor Neural Networks: An Application on Human Pose Classification

no code implementations17 Apr 2020 Konstantinos Makantasis, Athanasios Voulodimos, Anastasios Doulamis, Nikolaos Bakalos, Nikolaos Doulamis

Recent advances in sensing technologies require the design and development of pattern recognition models capable of processing spatiotemporal data efficiently.

General Classification

Tensor-Based Classifiers for Hyperspectral Data Analysis

no code implementations24 Sep 2017 Konstantinos Makantasis, Anastasios Doulamis, Nikolaos Doulamis, Antonis Nikitakis

Then, we introduce learning algorithms to train both the linear and the non-linear classifier in a way to i) to minimize the error over the training samples and ii) the weight coefficients satisfies the {\it rank}-1 canonical decomposition property.

Classification Dimensionality Reduction +1

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