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Title: Artificial neural networks for the generation of a conductivity map of the ground
Authors: Kalogirou, Soteris A. 
Florides, Georgios A. 
Pouloupatis, Panayiotis 
Christodoulides, Paul 
Joseph-Stylianou, Josephina 
Major Field of Science: Engineering and Technology
Field Category: Environmental Engineering
Keywords: Artificial neural networks;Boreholes;Geothermal maps;Ground conductivity
Issue Date: 2015
Source: Renewable Energy, 2015, vol. 77, pp. 400-407.
Volume: 77
Start page: 400
End page: 407
Journal: Renewable Energy 
Abstract: In this paper a neural network is used for the generation of a contour map of the ground conductivity in Cyprus. Archived data of thermal conductivity of ground recorded at 41 boreholes are used for training a multiple hidden layer neural network with feedforward architecture. The correlation coefficient obtained between the predicted and training data set is 0.9657, indicating an accurate mapping of the data. The validation of the network was performed using an unknown dataset. The correlation coefficient for the unknown cases was 0.9553. In order to broaden the database, the patterns used for the validation of the technique were embedded into the training data set and a new training of the network was performed. The correlation coefficient value for this case was equal to 0.9718. A 10×10km grid is then drawn over a detailed topographic map of Cyprus and the various input parameters were recorded for each grid point. This information was then supplied to the trained network and by doing so ground conductivity was predicted at each grid-point. This map will be a helpful tool for engineers in designing geothermal heat pump systems in Cyprus.
ISSN: 0960-1481
DOI: 10.1016/j.renene.2014.12.033
Rights: © Elsevier
Attribution-NonCommercial-NoDerivs 3.0 United States
Type: Article
Affiliation : Cyprus University of Technology 
Geological Survey Department of the Ministry of Agriculture 
Appears in Collections:Άρθρα/Articles

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