Browsing by Subject "Freqüències de sistemes oscil·lants"
Now showing items 1-11 of 11
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A low in-band radiation superregenerative oscillator
(2013-05-27)
Article
Open AccessThis 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
(SAGE PUBLICATIONS INC, 2021)
Article
Open AccessIn 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
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-06-27)
Article
Open AccessThe 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
(1991)
Book
Restricted access to the UPC academic communityConté: 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
(Universitat Politècnica de Catalunya, 2020-06)
Bachelor thesis
Open Access
Covenantee: Tsukuba DaigakuLos 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
(Universitat Politècnica de Catalunya, 2009-08-24)
Master thesis
Open AccessBioelectrical 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
(2022-02)
Article
Open AccessWe 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
(Institute of Electrical and Electronics Engineers (IEEE), 2020-07)
Article
Open AccessGrid 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
(Universitat Politècnica de Catalunya, 2014-06-10)
Master thesis
Open Access[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
(2015-08-07)
Article
Open AccessExciting 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 ... -
Transmisión de energía eléctrica por inducción para uso doméstico
(Universitat Politècnica de Catalunya, 2016-10-20)
Master thesis (pre-Bologna period)
Open AccessThis 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 ...
