Papers by Moisès Serra Serra
Applied Sciences
In this paper, the time variation of signals from several SCADA systems of geographically closed ... more In this paper, the time variation of signals from several SCADA systems of geographically closed turbines are analysed and compared. When operating correctly, they show a clear pattern of joint variation. However, the presence of a failure in one of the turbines causes the signals from the faulty turbine to decouple from the pattern. From this information, SCADA data is used to determine, firstly, how to derive reference signals describing this pattern and, secondly, to compare the evolution of different turbines with respect to this joint variation. This makes it possible to determine whether the behaviour of the assembly is correct, because they maintain the well-functioning patterns, or whether they are decoupled. The presented strategy is very effective and can provide important support for decision making in turbine maintenance and, in the near future, to improve the classification of signals for training supervised normality models. In addition to being a very effective system...
Operations Research Perspectives, 2022
Meat Science, 2019
The thickness of the subcutaneous fat (SFT) is a very important parameter in the ham, since deter... more The thickness of the subcutaneous fat (SFT) is a very important parameter in the ham, since determines the process the ham will be submitted. This study compares two methods to predict the SFT in slaughter line: an automatic system using an SVM model (Support Vector Machine) and a manual measurement of the fat carried out by an experienced operator, in terms of accuracy and economic benefit. These two methods were compared to the golden standard obtained by measuring SFT with a ruler in a sample of 400 hams equally distributed within each SFT class. The results show that the SFT prediction made by the SVM model achieves an accuracy of 75.3%, which represents an improvement of 5.5% compared to the manual measurement. Regarding economic benefits, SVM model can increase them between 12-17%. It can be concluded that the classification using SVM is more accurate than the one performed manually with an increase of the economic benefit for sorting.
HardwareX, 2018
This paper presents an easy-to-use, easy-to-customize, and low cost device for remote monitoring ... more This paper presents an easy-to-use, easy-to-customize, and low cost device for remote monitoring of Cultural Heritage environments such as museums, art galleries, and historical archives. The prototype allows measurements of temperature, relative humidity, and dew point. The chip used is an ESP8266 characterized by on-board Wi-Fi. The hardware design is flexible in order to host extra sensors via I 2 C bus and easy replacement of microcontroller and sensors in the event of either malfunctions or substitution with newer versions. The device is programmable using the Arduino IDE. The data are sent to an IoT platform that allows real-time visualization, analyses, and download. Tests were performed in laboratory and at the Casa de Convalescencia in Vic (Spain), by monitoring the microenvironment of an exhibition cabinet hosting 18th century ceramics. The results achieved are promising: the open hardware and software approach allows plan further implementations and provides a solid base for device customizations; in terms of technology applied to Cultural Heritage, the implementation of open hardware does not only can lower significantly the costs, but also provides scientifically reliable alternatives to off the shelf technology, as well as enhances end-users capability to develop customized devices that can better address specific needs.
Actualment un típic embedded system (ex. telèfon mòbil) requereix alta qualitat per portar a term... more Actualment un típic embedded system (ex. telèfon mòbil) requereix alta qualitat per portar a terme tasques com codificar/descodificar a temps real; han de consumir poc energia per funcionar hores o dies utilitzant bateries lleugeres; han de ser el suficientment flexibles per integrar múltiples aplicacions i estàndards en un sol aparell; han de ser dissenyats i verificats en un període de temps curt tot i l’augment de la complexitat. Els dissenyadors lluiten contra aquestes adversitats, que demanen noves innovacions en arquitectures i metodologies de disseny. Coarse-grained reconfigurable architectures (CGRAs) estan emergent com a candidats potencials per superar totes aquestes dificultats. Diferents tipus d’arquitectures han estat presentades en els últims anys. L’alta granularitat redueix molt el retard, l’àrea, el consum i el temps de configuració comparant amb les FPGAs. D’altra banda, en comparació amb els tradicionals processadors coarse-grained programables, els alts recursos ...
-, 2008
Dept. Navigation Sciences, Engineers and Shipbuilders HTS Nautical and Naval Machines Maria Diaz ... more Dept. Navigation Sciences, Engineers and Shipbuilders HTS Nautical and Naval Machines Maria Diaz de Haro, 68 Portugalete 48920 Bizkaia SPAIN Tfn: 034 94 6014847 email: [email protected] 1. Introduction Principal Component analysis (PCA) is a useful ...
Machines, Feb 10, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Preprints, Sep 26, 2019
Supervisory Control And Data Acquisition (SCADA) systems currently monitor and collect a huge amo... more Supervisory Control And Data Acquisition (SCADA) systems currently monitor and collect a huge among of data from all kind of processes. Ideally, they must run without interruption, but in practice, some data may be lost due to a sensor failure or a communication breakdown. When it happens, given the nature of these failures, information is lost in bursts, that is, sets of consecutive samples. When this occurs, it is necessary to fill out the gaps of the historical data with a reliable data completion method. This paper presents an ad hoc method to complete the data lost by a SCADA system in case of long bursts. The data correspond to levels of drinking water tanks of a Water Network company which present fluctuation patterns on a daily and a weekly scale. In this work, a new tensorization process and a novel completion algorithm mainly based on two tensor decompositions are presented. Statistical tests are realised, which consist of applying the data reconstruction algorithms, by deliberately removing bursts of data in verified historical databases, to be able to evaluate the real effectiveness of the tested methods. For this application, the presented approach outperforms the other techniques found in the literature.
This paper presents a design strategy for an underwater computer vision data system and its pre-p... more This paper presents a design strategy for an underwater computer vision data system and its pre-processing stage with the purpose of long-term fish behavior monitoring in a controlled environment. The biological experiment requires the continuous tracking of a group of fishes (of 10 to 20 specimens) in a prepared installation located in the Science Marine Laboratory in Mallorca. The experiment is thought to obtain empirical data to estimate biological energy models from specimen’s activity. In consequence it is required to identify and track each individual in the images, which supposes an important image processing effort. Our approach takes advantage from the prepared environment, as a part of the design strategy, by controlling light conditions and other environmental parameters in order to minimize undesired effects as reflections, shadows or waves in the water surface and, at the same time, taking into account the minimization of the pre-processing stage. The surface for survei...
Environmental Modelling & Software, 2018
IEEE 5th Workshop on Signal Processing Advances in Wireless Communications, 2004.
2004 IEEE 5th Workshop on Signal Processing Advances in Wireless Communications IFFTYFFT core arc... more 2004 IEEE 5th Workshop on Signal Processing Advances in Wireless Communications IFFTYFFT core architecture with an identical stage structure for wireless LAN communications Moises Serra Escola Politecnica Superior Universitat de Vic CI. de la Laura, 13 VIC (Barcelona) ...
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Papers by Moisès Serra Serra