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Please use this identifier to cite or link to this item: http://hdl.handle.net/UCSP/15761
Title: Sensor nodes fault detection for agricultural wireless sensor networks based on NMF
Authors: Ludeña Choez, Jimmy Diestin
Choquehuanca Zevallos, Juan José
Mayhua López, Efraín Tito
Keywords: Agriculture;Decision making;Discrete wavelet transforms;Factorization;Fault detection;Learning systems;Matrix algebra;Principal component analysis;Soil moisture;Wireless sensor networks;Decision making support;Machine learning methods;Multi-scale;Nonnegative matrix factorization;Normal behavior;Principal components;analysis;Sensing devices;Spectral representations;Sensor nodes
Issue Date: 2018
Publisher: Elsevier B.V.
metadata.dc.relation.uri: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85049352598&doi=10.1016%2fj.compag.2018.06.033&partnerID=40&md5=7ab1a19e2a2ccab9fad064a73e6e47c2
Abstract: Nowadays, Wireless Sensor Networks (WSN) are widely been employed to solve agricultural problems related to the optimization of scarce farming resources, decision making support, and land monitoring. However, the small sensing devices that are part of WSNs – known as sensor nodes – suffer from degradation and so producing erroneous measurements. In this paper, a machine learning method based on Non-Negative Matrix Factorization (NMF) is applied to the spectral representation of data acquired by a WSN to extract features that model the normal behavior of sensor node readings leading to a good representation of data using a low number of features. This procedure is accompanied by a classifier that decides if there is a set of features that deviates from the normal ones. Experiments on soil moisture data show that NMF achieves good results detecting flaws in readings from sensors. Results are compared with other method based on Principal Component Analysis (PCA), the Multi-scale PCA (MSPCA) algorithm. © 2018 Elsevier B.V.
URI: http://repositorio.ucsp.edu.pe/handle/UCSP/15761
ISSN: 1681699
Appears in Collections:Artículos de investigación

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