Browsing by Subject "Time-series analysis"

Now showing items 1-20 of 97

    • 20 years of ordinal patterns: perspectives and challenges 

      Leyva Callejas, Inmaculada; Martínez, Johann H.; Masoller Alonso, Cristina; Rosso, Osvaldo A.; Zanin, Massimiliano (Institute of Physics (IOP), 2022-05)
      Article
      Open Access
      In 2002, in a seminal article, Bandt and Pompe proposed a new methodology for the analysis of complex time series, now known as Ordinal Analysis. The ordinal methodology is based on the computation of symbols (known as ...

    • A kernel for time series classification: application to atmospheric pollutants 

      Arias Vicente, Marta; Troncoso, Alicia; Riquelme, José C. (2012)
      Conference report
      Open Access
      In this paper a kernel for time-series data is presented. The main idea of the kernel is that it is designed to recognize as similar time series that may be slightly shifted with one another. Namely, it tries to focus on ...

    • A model for a multiresolution time series database system 

      Llusà Serra, Aleix; Escobet Canal, Teresa; Vila Marta, Sebastià (WSEAS Press, 2013)
      Conference report
      Open Access
      In this paper we propose a model for multiresolution time series database management systems. Thismodel stores compactly a time series and manages consistently its temporal dimension. This is achieved byextracting different ...

    • A study of flight cancellation and delays in the UK 

      Vázquez Ibáñez, Alejandro Ramón (Universitat Politècnica de Catalunya, 2022-06-21)
      Master thesis
      Open Access
      Flight delays and flight cancellations have always been a problem for the aviation industry. However, the different nature of both phenomena has made research focus almost solely on studying and predicting delays. This is ...

    • A study of the air-sea interaction in the South Atlantic Convergence Zone through Granger causality 

      Tirabassi, Giulio; Masoller Alonso, Cristina; Barreiro, Marcelo (Wiley, 2015-10-01)
      Article
      Open Access
      Air-sea interaction in the region of the South Atlantic Convergence Zone (SACZ) is studied using Granger causality (GC) as a measure of directional coupling. Calculation of the area weighted connectivity indicates that the ...

    • An empirical approach to 5G coverage projection through time series matching 

      Campoy García, David (Universitat Politècnica de Catalunya, 2022-07-05)
      Bachelor thesis
      Open Access
      El aumento de la inteligencia y la capacidad de cálculo de los equipos de usuario (UE) deja la puerta abierta a un nuevo paradigma, en el que los dispositivos personales toman un papel activo en su integración como parte ...

    • An interval technical indicator for financial time series forecasting 

      Ruiz Vegas, Francisco Javier; Samà Monsonís, Albert; Sanchez, German; Sanabria, José A.; Agell Jané, Núria (2011)
      Conference report
      Open Access
      In this work we compare the performance of some standard technical indicators with an interval technical indicator, the moving interval (MI), for time series forecasting. MI has the advantage of taking into account the ...

    • Analysis of explainable artificial intelligence on time series data 

      Jakubiak, Natalia (Universitat Politècnica de Catalunya, 2022-10-19)
      Master thesis
      Open Access
      In recent years, the interest in Artificial Intelligence (AI) has experienced a significant growth, which has contributed to the emergence of new research directions such as Explainable Artificial Intelligence (XAI). The ...

    • Analysis of noise-induced temporal correlations in neuronal spike sequences 

      Reinoso, Jose A.; Torrent Serra, Maria del Carmen; Masoller Alonso, Cristina (2016-11-01)
      Article
      Open Access
      We investigate temporal correlations in sequences of noise-induced neuronal spikes, using a symbolic method of time-series analysis. We focus on the sequence of time-intervals between consecutive spikes (inter-spike-intervals, ...

    • Analyzing human gait and posture by combining feature selection and kernel methods 

      Samà Monsonís, Albert; Angulo Bahón, Cecilio; Pardo Ayala, Diego Esteban; Català Mallofré, Andreu; Cabestany Moncusí, Joan (2011-09)
      Article
      Open Access
      This paper evaluates a set of computational algorithms for the automatic estimation of human postures and gait properties from signals provided by an inertial body sensor. The use of a single sensor device imposes ...

    • Anàlisi de la variabilitat del ritme cardíac en corredors del Projecte Summit 

      Birk Tuá, Sara; Forgas Ylla-català, Ariadna (Universitat Politècnica de Catalunya, 2016-06-23)
      Bachelor thesis
      Restricted access - confidentiality agreement

    • Anàlisi, detecció i estudi de bombolles múltiples en sèries temporals de freqüència de cerques a Google 

      Criballés Vilamitjana, Sabina (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2020-06)
      Bachelor thesis
      Open Access
      [cat] La detecció de períodes d’exhuberància i crisi en sèries temporals permet una anàlisi més a fons d’aquestes, i un desenvolupament de millors mètodes de predicció. Dins el comportament d’una sèrie trobem les bombolles: ...

    • Análisis de la evolución temporal de los indicadores sociales y económicos regionales 

      Pérez García, Adrià (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2023-01)
      Bachelor thesis
      Open Access
      Los indicadores sintéticos son una herramienta valiosa para evaluar el desempeño económico y social en una región o país. Se utilizan para combinar varios indicadores en un solo valor numérico, lo que permite una comparación ...

    • Análisis de la evolución temporal del uso del transporte público en Tokyo y Barcelona 

      Safont Paños, Axel (Universitat Politècnica de Catalunya, 2022-07-08)
      Bachelor thesis
      Open Access
      Una de les claus de la mobilitat del futur és l’ús del transport públic per part de la població que viu, treballa i/o es mou en nuclis urbans. Tenint en compte aquest fet, en aquest TFG es durà a terme l’estudi de l’ús del ...

    • Análisis de series temporales: Uso del transporte público en Barcelona 

      El Amrani Joutey, El Habib (Universitat Politècnica de Catalunya, 2020-07-14)
      Bachelor thesis
      Open Access
      Avui dia existeixen diversos models d'anàlisi de sèries temporals. En el present TFG es pretén realitzar un estudi comparatiu sobre diferents models: ARIMA, SARIMA i Holt-Winters aplicats a l'evolució de l'transport públic ...

    • Análisis espectral del contenido de agua en suelos no saturados 

      Candanedo Gomez, Mario Marcel (Universitat Politècnica de Catalunya, 2023-07-20)
      Master thesis
      Open Access
      La cantidad de agua presente en los suelos no saturados experimenta variaciones significativas a lo largo del tiempo debido. Esta variación obedece a los flujos entrantes y salientes, ya sea por escorrentía, lluvias o ...

    • Análisis sobre la evolución del precio de la gasolina y el gasoil 

      Xu, Peilei (Universitat Politècnica de Catalunya / Universitat de Barcelona, 2022-09)
      Bachelor thesis
      Open Access
      En este trabajo, pretende analizar el impacto de los factores que provocan el aumento del precio de los carburantes. Concretamente, el estudio se centrará en la gasolina, el gasóleo y gasóleo para calefacción. Para poder ...

    • Are the markets influenced by the frequency and the long relationships? 

      Márquez, M. Dolores; Muñoz Gracia, María del Pilar (2008)
      Conference report
      Restricted access - publisher's policy
      This paper analyzes the multivariate volatility effects among the indexes returns time series of the main stock markets. We detect, applying cointegration techniques, relations of interdependence between these markets and ...

    • Artificial neural networks applied to forecasting time series 

      Montaño Moreno, Juan José; Palmer Pol, Alfonso; Muñoz Gracia, María del Pilar (2011)
      Article
      Restricted access - publisher's policy
      This study offers a description and comparison of the main models of Artificial Neural Networks (ANN) which have proved to be useful in time series forecasting, and also a standard procedure for the practical application ...

    • Change detection for economic activities monitoring using Sentinel-1 data 

      Herrera Giménez, Marc (Universitat Politècnica de Catalunya, 2021-06-21)
      Bachelor thesis
      Restricted access - author's decision