Browsing by Subject "Fourier transformations"
Now showing items 1-20 of 22
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Acoustic emission analysis for the detection of appropriate cutting operations in honing processes
(2018-01-15)
Article
Open AccessIn the present paper, acoustic emission was studied in honing experiments obtained with different abrasive densities, 15, 30, 45 and 60. In addition, 2D and 3D roughness, material removal rate and tool wear were determined. ... -
An FFT-based CLEAN deconvolution method for interferometric microwave radiometers with spatially variable beam pattern
(Institute of Electrical and Electronics Engineers (IEEE), 2021-02-01)
Article
Restricted access - publisher's policyA modification to the extended CLEAN deconvolution method for passive microwave interferometric radiometers is presented to account for the interferometer beam patterns that vary depending on the source position within the ... -
Analysis of signal processing techniques for high impedance fault detection in distribution systems
(Institute of Electrical and Electronics Engineers (IEEE), 2021-12)
Article
Restricted access - publisher's policy -
Artificial Intelligence to the end-device
(Universitat Politècnica de Catalunya, 2023-07-05)
Bachelor thesis
Restricted access - confidentiality agreementThe aim of this thesis is to develop an efficient and high-performing Neural Network model for enhancing keyword spotting systems (KWS) on devices with limited resources. After extensive research and experimentation, ... -
Automatic measurements of partial cover factors and yarn diameters in fabrics using image processing
(2011-01)
Article
Restricted access - publisher's policy -
Built in dampers for stayed cables in bridges via SMA. The SMARTeR-ESF project: a mesoscopic and macroscopic experimental analysis with numerical simulations
(Elsevier, 2013-04)
Article
Open AccessShape Memory Alloys (SMAs) are good candidates for solid-state dampers appropriate for the oscillations of bridge stay cables because of their large recoverable strain, hysteresis and reasonable fatigue-life. This work ... -
Cleaning and measuring tools using digital image processing methods
(Universitat Politècnica de Catalunya / Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik, 2013-07-31)
Master thesis (pre-Bologna period)
Open Access
Covenantee: Technische Universität Berlin[ANGLÈS] Many industrial machines use screws and other small tools to fix smaller components that compose the whole structure of the machine. To ensure that these tools withstand the pressures that can be subjected at, a ... -
Deterministic analysis of the accuracy in FFT hardware architectures
(Universitat Politècnica de Catalunya / Linköpings Universitet, 2012-06-07)
Master thesis (pre-Bologna period)
Open Access[ANGLÈS] This Master Thesis studies the different quantization effects in hardware architecture due to the use of finite word lenght. This master thesis gives a deterministic analysis with relation to the accuracy and ... -
Deterministic thermal lanscape engineering at the microscale level by optical beam shaping with phase-only hologram
(Universitat Politècnica de Catalunya, 2018-09-06)
Master thesis
Restricted access - author's decisionAn optical beam shaping system based on a phase-only spatial light modulator (SLM) was integrated into a holographic optical microscope developed to deliver heat locally and measure the resulting temperature in a label-free ... -
Double image encryption system using a nonlinear joint transform correlator in the Fourier domain
(Multidisciplinary Digital Publishing Institute (MDPI), 2023-02-02)
Article
Open AccessIn this work, we present a new nonlinear joint transform correlator (JTC) architecture in the Fourier domain (FD) for the encryption and decryption of two simultaneous images. The main features of the proposed system are ... -
Estudio de la previsión de las series de tráfico por medio de la transformada Wavelet
(Universitat Politècnica de Catalunya, 2016-10)
Master thesis (pre-Bologna period)
Open AccessNowadays, the amount of information that communications networks support due to its rise, makes necessary the distribution of different information flows, to avoid saturation and information lose. This project aims to ... -
Generalized formulation of an encryption system based on a joint transform correlator and fractional Fourier transform
(Institute of Physics (IOP), 2014-12-01)
Article
Open AccessWe propose a generalization of the encryption system based on double random phase encoding (DRPE) and a joint transform correlator (JTC), from the Fourier domain to the fractional Fourier domain (FrFD) by using the fractional ... -
Implementación y análisis de transformadoras de Fourier para protein-docking en cell BE
(Universitat Politècnica de Catalunya, 2007-06-27)
Master thesis (pre-Bologna period)
Open Access -
Implementation and analysis of super-resolution image techniques
(Universitat Politècnica de Catalunya, 2022-07-05)
Bachelor thesis
Open Access
Covenantee: Politecnico di MilanoSuper-Resolution (SR) is a branch of deep learning aiming at improving the resolution of an image preserving as much detail as possible. This technology applied to overhead imagery has been on the rise in the recent years, ... -
Log-periodic optical antennas
(Universitat Politècnica de Catalunya, 2011-09-07)
Master thesis
Open AccessEnglish: In recent years optical antennas have been attracting very strong interest due to the unique possibilities they offer for manipulating light on a sub-wavelength scale. Most published work deals with relatively ... -
Mean field study of doubly Dipolar Bose condensates
(Universitat Politècnica de Catalunya, 2023-07-10)
Bachelor thesis
Open AccessStudy of the behavior and configurations of a weakly interacting Bose-Einstein condensate under the influence of doubly dipolar interactions. -
Measurements on Unruh-DeWitt detectors: negative energy densities and interference
(Universitat Politècnica de Catalunya, 2024-06-21)
Bachelor thesis
Restricted access - confidentiality agreement
Covenantee: Institute for Quantum ComputingS'ha comprovat que els models basats en detectors Unruh-DeWitt reprodueixen fenòmens d'interacció llum-matèria en situacions on l'intercanvi de moment angular és negligible. Això suggereix la possibilitat d'estudiar ... -
Non-linear spectral estimation
(Institute of Electrical and Electronics Engineers (IEEE), 1987)
Conference report
Open AccessThis work describes the use of constraints in variational procedures for spectral analysis. It is reported how the designer in a variational approach for spectral estimation has to select a set of constraints. At the same ... -
Optical warning of bicycle riders concerning motorized vehicles closing from behind using the smartphone microphone
(Universitat Politècnica de Catalunya, 2022-02-02)
Bachelor thesis
Open Access
Covenantee: Technische Universität WienDeaf cyclists do not receive acoustic warnings of motor vehicles approaching from behind. This can be very dangerous because they can get startled and wobble, making them loose stability and more exposed to possible ... -
Rayleigh estimates: performing like SVD
(1988)
Conference report
Open AccessThis paper describes the structure of the so- called Rayleigh estimates and the features they share with indirect SVD like procedures. The problem of finding procedures of high resolution in spectral estimation is faced ...
