Exploració per tema "Freqüències de sistemes oscil·lants"

Ara es mostren els items 1-12 de 12

    • A low in-band radiation superregenerative oscillator 

      Palà Schönwälder, Pere; Bonet Dalmau, Jordi; Moncunill Geniz, Francesc Xavier; Águila López, Francisco del; Giralt Mas, Ma. Rosa (2013-05-27)
      Article
      Accés obert
      This brief describes a superregenerative (SR) voltage-controlled oscillator as a building block for SR receivers where most of the oscillator spectrum components are outside the reception frequency band. This allows ...

    • A numerical and scaled experimental study on ride comfort enhancement of a high-speed rail vehicle through optimizing traction rod stiffness 

      Bokaeian, Vahid; Rezvani, Mohammad A.; Arcos Villamarín, Robert (SAGE PUBLICATIONS INC, 2021)
      Article
      Accés obert
      In this research, the effect of rail vehicle carbody’s flexural modes on the ride comfort of an example high-speed railway vehicle is investigated. The vehicle is modeled as a rigid multi-body system, where the rigid body ...

    • An efficient experimental methodology for the assessment of the dynamic behaviour of resilient elements 

      Reina, Salvatore; Arcos Villamarín, Robert; Clot Razquin, Arnau; Romeu Garbí, Jordi (Multidisciplinary Digital Publishing Institute (MDPI), 2020-06-27)
      Article
      Accés obert
      The assessment of the dynamic behaviour of resilient elements can be performed using the indirect method as described in the standard ISO 10846-3. This paper presents a methodology for control the error on the estimation ...

    • Anàlisi de senyals 

      Agulló Batlle, Joaquim; Cardona Foix, Salvador (1991)
      Llibre
      Accés restringit a la comunitat UPC
      Conté: Volum I. 1. Classificació dels senyals i dels mètodes d'anàlisi. 2. Anàlisi en el domini de l'amplitud. 3. Anàlisi en el domini temporal -- Volum 2. 4. Anàlisi freqüencial contínua. 5. Anàlisi freqüencial discreta ...

    • Boson peak in transitionally ordered and orientationally disordered phases 

      Bernet Garcia, Marc (Universitat Politècnica de Catalunya, 2020-06)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Tsukuba Daigaku
      Los vidrios y cristales desordenados han sido objeto de debate debido a su comportamiento anormal en sus propiedades dieléctricas y termodinámicas. En el siguiente trabajo, se ha estudiado un conjunto de dos muestras que ...

    • Development of a capacitive bioimpedance measurement system 

      Gómez Abad, Daniel (Universitat Politècnica de Catalunya, 2009-08-24)
      Projecte Final de Màster Oficial
      Accés obert
      Bioelectrical impedance spectroscopy (BIS) is a well-established and non-invasive method to determine and monitor body composition. Commercially available bioelectrical impedance systems use coated hydrogel-aluminium ...

    • Experimental and Numerical Study of Locking of Low-Frequency Fluctuations of a Semiconductor Laser with Optical Feedback 

      Tiana Alsina, Jordi; Masoller Alonso, Cristina (2022-02)
      Article
      Accés obert
      We study the output of a semiconductor laser with optical feedback operated in the lowfrequency fluctuations (LFFs) regime and subject to weak sinusoidal current modulation. In the LFF regime, the laser intensity exhibits ...

    • Novel analytical method for dynamic design of renewable SSG SPC unit to mitigate low-frequency electromechanical oscillations 

      Abdollahi, Mostafa; Candela García, José Ignacio; Rocabert Delgado, Joan; Atef Abbas Elsaharty, Mohamed; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2020-07)
      Article
      Accés obert
      Grid operators require grid connected RGUs to provide specific dynamic features. RGUs must support dynamic performance of grid and operate in such a way to ward off new issues in grid. Recently, unfavorable oscillatory ...

    • Optical and Electrical characterization of Carbon Nanotube based high-Q mechanical resonators 

      Palou Garcia, Xavier (Universitat Politècnica de Catalunya, 2014-06-10)
      Projecte Final de Màster Oficial
      Accés obert
      [ANGLÈS] Carbon Nanotubes have been one of the most intensively studied materials in the last two decades. Because of their combination of outstanding properties (mechanical, thermal, electrical, optical, etc.) the community ...

    • Reentrant behavior of the breathing-mode-oscillation frequency in a one-dimensional Bose gas 

      Gudyma, A; Astrakharchik, Grigori; Zvonarev, Mikhail (2015-08-07)
      Article
      Accés obert
      Exciting temporal oscillations of the density distribution is a high-precision method for probing ultracold trapped atomic gases. Interaction effects in their many-body dynamics are particularly puzzling and counter-intuitive ...

    • SNR measurement of superregenerative oscillators 

      Bonet Dalmau, Jordi; Palà Schönwälder, Pere; Moncunill Geniz, Francesc Xavier (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      In this paper a method to measure the signal-to-noise ratio of superregenerative oscillators is presented. A spectrum analyzer can easily be coupled to a superregenerative oscillator without paying attention to possible ...

    • Transmisión de energía eléctrica por inducción para uso doméstico 

      Martínez Vila, Jesús (Universitat Politècnica de Catalunya, 2016-10-20)
      Projecte/Treball Final de Carrera
      Accés obert
      This project is focused on the study, design and construction of a system of power transmission without contact through inductive coupling. The applications are very varied, but this work is going to focus on applications ...