http://hdl.handle.net/2117/7021 Thu, 23 May 2013 22:02:48 GMT 2013-05-23T22:02:48Z webmaster.bupc@upc.edu Universitat Politècnica de Catalunya. Servei de Biblioteques i Documentació no http://hdl.handle.net/2117/19183 Title: Model and requirements for a multiresolution time series database management system Authors: Llusa Serra, Aleix; Escobet Canal, Teresa; Vila Marta, Sebastià Abstract: In this paper we define a model for multiresolution time series database management systems. The main objective is to store compactly a time series and manage consistently its temporal dimension. It is achieved by extracting diferent resolutions and attributes summaries from the time series. Our work is concerned in putting together two areas of study: time series analysis and database management systems (DBMS). Time series analysis offers a great deal of methodologies and algorithms to process time series data and database field provides software expertise in managing data. Therefore it is of primary relevance that DBMS support time series. Mon, 13 May 2013 15:19:06 GMT http://hdl.handle.net/2117/19183 2013-05-13T15:19:06Z Llusa Serra, Aleix; Escobet Canal, Teresa; Vila Marta, Sebastià no In this paper we define a model for multiresolution time series database management systems. The main objective is to store compactly a time series and manage consistently its temporal dimension. It is achieved by extracting diferent resolutions and attributes summaries from the time series. Our work is concerned in putting together two areas of study: time series analysis and database management systems (DBMS). Time series analysis offers a great deal of methodologies and algorithms to process time series data and database field provides software expertise in managing data. Therefore it is of primary relevance that DBMS support time series. http://hdl.handle.net/2117/12791 Title: Detecció de fallades en un sistema de piles de combustible Authors: Escobet Canal, Antoni; Nebot Castells, M. Àngela Abstract: In this work a fault diagnosis system for non-linear plants based on fuzzy logic, called VisualBlock-FIR, is presented and applied to an energy generation system based on fuel cells. VisualBlock-FIR runs under the Simulink framework and enables early fault detection and identification. During fault detection, the fault diagnosis system should recognize that the system is not working properly. During fault identification, it should conclude which type of failure has occurred. The diagnosis results for some of the most frequent faults in fuel cell systems are presented. Fri, 17 Jun 2011 16:15:46 GMT http://hdl.handle.net/2117/12791 2011-06-17T16:15:46Z Escobet Canal, Antoni; Nebot Castells, M. Àngela no In this work a fault diagnosis system for non-linear plants based on fuzzy logic, called VisualBlock-FIR, is presented and applied to an energy generation system based on fuel cells. VisualBlock-FIR runs under the Simulink framework and enables early fault detection and identification. During fault detection, the fault diagnosis system should recognize that the system is not working properly. During fault identification, it should conclude which type of failure has occurred. The diagnosis results for some of the most frequent faults in fuel cell systems are presented.