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Consulteu Llibres i capítols de llibres per autor "Universitat de Vic. Escola Politècnica Superior"

Consulteu Llibres i capítols de llibres per autor "Universitat de Vic. Escola Politècnica Superior"

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  • Automatic Trend Line Generation f or timeseries analysis: a Graphical Approach
    Rivera Peruyero, Juan Ricardo; Martí i Puig, Pere (2013)
    Trend lines are revealed useful to explain the past evolution of timeseries of prices that are represented on graphics. However, in practice, there are a huge amount of possible trend lines to be plotted but only a reduced ...
  • Closed Contour Shape Descriptors with High Compression Properties Based on the Discrete Hartley Transform
    Martí i Puig, Pere; Reig Bolaño, Ramon; Danés Garolera, Jaume (IOP Press, 2013)
    The quantitative analysis of shapes is required in some research fields, such as taxonomy, agronomy, ecology, medicine, among others. The quantification of an object shape, or a biological entity shape as extension, is ...
  • Complete Monotonic Semantic Path Orderings
    Borralleras Andreu, Cristina; Ferreira, Maria; Rubio, Albert (Springer, 2000)
    Although theoretically it is very powerful, the semantic path ordering (SPO) is not so udeful in practice, since its monotonicity has to be proved by hand for each concrete term rewrite system (TRS). In this paper we present ...
  • Data compression of natural signals based on Discrete Wavelet transform analysis
    Reig Bolaño, Ramon; Martí i Puig, Pere; Solé-Casals, Jordi; Parisi Baradad, Vicenç (2009)
  • An experimental features selection approach in a multiclass classifier
    Reig Bolaño, Ramon; Martí i Puig, Pere (IOP Press, 2013)
    This paper focuses on an experimental feature selection for the images of otoliths in order to validate their effectiveness in a multiclass classifier used to resolve an automatic otolith identification process. Otoliths ...
  • Exploring Non-linear Transformations for an Entropybased Voice Activity Detector
    Solé-Casals, Jordi; Martí i Puig, Pere; Reig Bolaño, Ramon (2009)
    In this paper we explore the use of non-linear transformations in order to improve the performance of an entropy based voice activity detector (VAD). The idea of using a non-linear transformation comes from some previous ...
  • Improving Early Diagnosis of Alzheimer's Disease Using Synchrony Measures
    Gallego Jutglà, Esteve; Solé-Casals, Jordi (IOS Press, 2013)
    It is well-known that Alzheimer's disease causes changes on the electroencephalography of the patients. However those changes are difficult to parameterize. In this paper a new ratio between synchrony in 0 and a band ...
  • Improving Pitch Tracking Performance in Hard Noise Conditions by a Preprocessing Based on Mathematical Morphology
    Martí i Puig, Pere; Solé-Casals, Jordi; Reig Bolaño, Ramon (2009)
    In this paper we show how a nonlinear preprocessing of speech signal -with high noise- based on morphological filters improves the performance of robust algorithms for pitch tracking (RAPT). This result happens for a ...
  • Low-cost printed antennas design in the band of 2,4GHz
    Martí i Puig, Pere; Serra i Serra, Moisès; Carrabina, Jordi (SPIE, 2005)
    In this article we present a study and the corresponding implementation of low cost printed antennas in the 2,4GHz band. These antennas work with low cost transceivers that give a FR input/output signal in the band of ...
  • Monotonic AC-Compatible Semantic Path Orderings
    Borralleras Andreu, Cristina; Rubio, Albert (Springer, 2003)
    Abstract. Polynomial interpretations and RPO-like orderings allow one to prove termination of Associative and Commutative (AC-)rewriting by only checkingthe rules of the given rewrite system. However, these methods have ...
  • On cumulant techniques in speech processing
    Zaiats, Vladimir; Solé-Casals, Jordi (2009)
    This paper analyzes applications of cumulant analysis in speech processing. A special focus is made on different second-order statistics. A dominant role is played by an integral representation for cumulants by means ...
  • On the alzheimer’s disease diagnosis: Automatic spontaneous speech analysis
    Lopez-de-Ipiña, Karmele; Solé-Casals, Jordi; Alonso, Jesús B.; Travieso, Carlos M.; Ecay-Torres, Miriam; Martinez-Lage, Pablo (Springer, 2014)
    Alzheimer’s disease (AD) is the most prevalent form of progressive degenerative dementia and it has a high socio-economic impact in Western countries therefore is one of the most active research areas today. Its diagnosis ...
  • Online drawings for dementia diagnose: in-air and pressure information analysis
    Faundez-Zanuy, Marcos; Sesa Nogueras, Enric; Roure Alcobé, Josep; Garré Olmo, Josep; Lopez-de-Ipiña, Karmele; Solé-Casals, Jordi (Springer, 2014)
    In this paper we present experimental results comparing on-line drawings for control population (left and right hand) as well as Alzheimer disease patients. The drawings have been acquired by means of a digitizing tablet, ...
  • Otoliths identifiers using image contours EFD
    Reig Bolaño, Ramon; Martí i Puig, Pere; Rodríguez, Sara; Bajo, Javier; Parisi Baradad, Vicenç (Springer Berlín / Heidelberg, 2010)
    Abstract. In this paper we analyze the characteristics of an experimental otolith identification system based on image contours described with Elliptical Fourier Descriptors (EFD). Otoliths are found in the inner ear of ...
  • Smoothing FMRI Data Using an Adaptive Wiener Filter
    Bartés i Serrallonga, Manel; Serra Grabulosa, Josep M.; Adan, Ana; Falcón, Carles; Bargalló, Núria; Solé-Casals, Jordi (2015)
    The analysis of fMRI allows mapping the brain and identifying brain regions activated by a particular task. Prior to the analysis, several steps are carried out to prepare the data. One of these is the spatial smoothing ...
  • Spontaneous Speech and Emotional Response modeling based on One-class classifier oriented to Alzheimer Disease diagnosis
    Lopez-de-Ipiña, Karmele; Alonso, Jesús B.; Barroso, Nora; Solé-Casals, Jordi; Ecay-Torres, Miriam; Martinez-Lage, Pablo; Zelarain, F.; Egiraun, Harkaitz; Travieso, Carlos M. (Springer, 2014)
    The purpose of our project is to contribute to earlier diagnosis of AD and better estimates of its severity by using automatic analysis performed through new biomarkers extracted from non-invasive intelligent methods. The ...

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