Browsing by Subject "Noise"

Now showing items 1-20 of 83

    • A general analysis of error in noise measurement systems 

      Pradell i Cara, Lluís; Comerón Tejero, Adolfo; Ramírez González, Alejandro (Institute of Electrical and Electronics Engineers (IEEE), 1988)
      Conference report
      Open Access
      General and approximated expressions are presented which allow the identification and quantification of errors in noise figure measurements that use the Y-factor method. This formulation is a generalization of that in /2/ ...

    • A new mathematical profile for experimental Raman spectra of historical mineral pigments 

      Penalba Albuixech, Andrea (Universitat Politècnica de Catalunya, 2020-07)
      Bachelor thesis
      Open Access
      This final degree project (GFR) is based on the use of Raman spectroscopy as a method of characterizing pigments of mineral origin and especially those used in art. One of the fundamental objectives has been to find precise ...

    • Active noise cancellation 

      Torre Rovira, Guillem de la (Universitat Politècnica de Catalunya, 2017-06)
      Bachelor thesis
      Open Access
      Donats els recents progressos en Cancel·lació Activa de Soroll (CAS) per a Avions [11], Cascos de música [10], Telèfons [8], etc. vaig decidir desenvolupar un sistema de cancel·lació activa de soroll per espais menys ...

    • Advanced techniques for grau area mitigation in DES simulations and their effectes on the subsonic round jet acoustic spectra 

      Duben, Alexey; Ruano Pérez, Jesús; Trias Miquel, Francesc Xavier; Rigola Serrano, Joaquim (2021)
      Conference report
      Restricted access - publisher's policy
      The research dedicated to the investigation of different gray-area mitigation approaches towards accurate aerodynamics and aeroacoustics is presented. The recent modifications of hybrid RANS-LES DDES approach based on ...

    • Analysis of denoising algorithms for Polarimetric SAR data: the cases of the Bilateral and the Non Local Means filters 

      Martinez Del Hoyo Guri, Antonio (Universitat Politècnica de Catalunya, 2014-09-12)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Technische Universität Berlin
      [ANGLÈS] The aim of this thesis is to do an in-depth analysis of state-of-the-art denoising methods for Polarimetric SAR data and to propose a new algorithm taking advantage on their strong points. The filters under analysis ...

    • 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, ...

    • Analysis of the Path Tracing rendering method on CPU and GPU 

      Gil González, Jordi (Universitat Politècnica de Catalunya, 2020-04-23)
      Bachelor thesis
      Open Access
      Fa molts anys que es realitza recerca al camp de la renderització realista. Tenim diversos mètodes capaços d'aconseguir imatges amb un gran grau de realisme, com pot ser Ray Tracing, Path Tracing, Photon Mapping o Metropolis ...

    • Analysis, evaluation, and comparison of polarimetric SAR speckle filtering techniques 

      Foucher, Samuel; López Martínez, Carlos (2014-04)
      Article
      Restricted access - publisher's policy
      Speckle noise filtering on polarimetric SAR (PolSAR) images remains a challenging task due to the difficulty to reduce a scatterer-dependent noise while preserving the polarimetric information and the spatial information. ...

    • Anàlisis de l'impacte acústic de vies de transport a Montcada i Reixac i proposta de mesures mitigadores 

      Vicente Ballesteros, Álvaro (Universitat Politècnica de Catalunya, 2021-06-02)
      Master thesis
      Open Access
      Montcada i Reixac és un municipi de la comarca del Vallés Occidental on conflueixen diverses vies de trànsit rodat i ferroviari per la seva proximitat a la capital barcelonina. Aquest projecte estudia l'afectació sonora ...

    • Análisis y optimización acústica de recintos cerrados 

      Jiménez Hernández, Cecilia (Universitat Politècnica de Catalunya, 2022-07-05)
      Bachelor thesis
      Restricted access - confidentiality agreement

    • Application of the method of decomposition of lidar signal-to-noise ratio to the assessment of laser instruments for gaseous pollution detection 

      Agishev, Ravil R.; Comerón Tejero, Adolfo; Gross, B.; Moshary, F.; Ahmed, S.; Gilerson, A.; Vlasov, V.A. (2004-07)
      Article
      Open Access
      A general methodology for rating both performance and potential of lidar systems used for detection of atmospheric trace constituents including pollutants and gas leaks is developed. By individually examining and ...

    • Assessment of environmental noise and its effect on neonates in a Neonatal Intensive Care Unit 

      Romeu Garbí, Jordi; Cotrina, Laura; Perapoch, Josep; Linés, Marcos (2016-10-01)
      Article
      Open Access
      A method for analyzing the influence of noise on newborns is proposed. The method consists of defining three different types of time interval (quiet, noisy and nursing) and, for each period, environmental noise levels, ...

    • Bilateral distance based filtering for polarimetric SAR data 

      Alonso González, Alberto; López Martínez, Carlos; Salembier Clairon, Philippe Jean; Deng, Xinping (2013-10-30)
      Article
      Open Access
      This paper introduces a non-linear Polarimetric SAR data filtering approach able to preserve the edges and small details of the data. It is based on exploiting the data locality in both, the spatial and the polarimetric ...

    • Calidad acústica de nuestras aulas ¿dificultades de audición? 

      Villares, Carla; Cardona Torradeflot, Genís (2021-05)
      Article
      Open Access
      La calidad acústica del ambiente en que se realiza el aprendizaje puede ser determinante a la hora de obtener mejores resultados. Así pretende demostrarlo un estudio realizado en la Facultad de Óptica y Optometría de ...

    • Characterisation of an AMR-based magnetic sensor for the LISA mission 

      Bonastre Majoral, Biel (Universitat Politècnica de Catalunya, 2022-10-25)
      Bachelor thesis
      Open Access
      Covenantee:   Institut d'Estudis Espacials de Catalunya
      This document contains the final thesis (TFG) where an HMC-1002 AMR magnetic sensor is characterized to meet the requirements for the LISA space mission to be carried out in 2034. It first explains the LISA mission along ...

    • Characterization of laplacian surface electromyographic signals during isometric contraction in biceps brachii 

      Estrada, Luis; Torres Cebrián, Abel; Garcia Casado, Javier; Prats Boluda, Gema; Jané Campos, Raimon (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      Surface electromyography (sEMG) is a noninvasive technique for monitoring the electrical activity produced by the muscles. Usually, sEMG is performed by carrying out monopolar or bipolar recordings by means of conventional ...

    • Coherence and anticoherence resonance tuned by noise 

      Lacasta Palacio, Ana María; Sagués Mestre, Francesc; Sancho, Jose Maria (American Physical Society, 2002-10-24)
      Article
      Open Access
      We present numerical evidence and a theoretical analysis of the appearance of anticoherence resonance induced by noise, not predicted in former analysis of coherence resonance. We have found that this phenomenon occurs for ...

    • Collective stochastic coherence and synchronizability in weighted scale-free networks 

      Balenzuela, Pablo; Rue Queralt, Pau; Boccaletti, Stefano; García Ojalvo, Jordi (2014-01-21)
      Article
      Open Access
      Coupling frequently enhances noise-induced coherence and synchronization in interacting nonlinear systems, but it does so separately. In principle collective stochastic coherence and synchronizability are incompatible ...

    • Comments on and extensions of wolf's signal-to-channel noise formulas for delta-modulated systems 

      Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo; Lagunas Hernandez, Miguel A. (1980-01)
      Article
      Open Access

    • Comparison of different order cumulants in a speech enhancement system by adaptive Wiener filtering 

      Salavedra Molí, Josep; Masgrau Gómez, Enrique José; Moreno Bilbao, M. Asunción (IEEE Press, 1993)
      Conference report
      Open Access
      The authors study some speech enhancement algorithms based on the iterative Wiener filtering method due to Lim and Oppenheim (1978), where the AR spectral estimation of the speech is carried out using a second-order analysis. ...