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Ara es mostren els items 3051-3070 de 245770
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A census for curves and surfaces with diophantine stability over finite fields
(Universitat Politècnica de Catalunya, 2021-10-29)
Tesi
Accés obertAn algebraic variety defined over a field is said to have Diophantine stability for an extension of this field if the variety does not acquire new points in the extension. Diophantine stability has a growing interest due ... -
A Central Limit Theorem for inner functions
(2022-06)
Article
Accés obertA Central Limit Theorem for linear combinations of iterates of an inner function is proved. The main technical tool is Aleksandrov Disintegration Theorem for Aleksandrov-Clark measures. -
A centrality-based topology control protocol for wireless mesh networks
(Elsevier, 2015-01-01)
Article
Accés obertNodes in wireless multi-hop networks establish links with their neighbors, which are used for data transmission. In general, in this kind of networks every node has the possibility of acting as a router, forwarding the ... -
A century of tourism in Europe: new challenges to the discipline of urbanism
(International Forum on Urbanism / Escola Técnica Superior d'Arquitectura de Barcelona, 2012-01)
Text en actes de congrés
Accés obertTourism is one of the most important modern phenomena of the last hundred years. Not only for its economic significance, but also by the changes it has produced in the city and the territory. Unfortunately, in many cases ... -
A Ceres solver based bundle adjustment module
(Universitat Politècnica de Catalunya, 2014-07)
Treball Final de Grau
Accés obertA principis de la dècada dels 90, l’Institut Cartogràfic i Geològic de Catalunya va desenvolupar un programa anomenat ACX que permet, entre altres aplicacions, aerotriangular blocs fotogramètrics fent ús del mètode de ... -
A CFD Benchmark on the Thermal Hydraulic Behavior of ITER’s Vacuum Vessel
(Universitat Politècnica de Catalunya, 2020-07-27)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorThe current project presents a CFD Benchmark on the Thermal-Hydraulic (TH) performance of ITER’s Vacuum Vessel. The geometry has been selected to be of one of the 4 Poloidal Segments (PS), the PS#01, of a Regular Sector ... -
A CFD framework for offshore and onshore wind farm simulation
(IOP Publishing, 2017)
Article
Accés obertWe present a wind simulation framework for offshore and onshore wind farms. The simulation framework involves an automatic hybrid high-quality mesh generation process, a pre-processing to impose initial and boundary ... -
A CFD study of air flow inside a building heated by solar radiation
(Universitat Politècnica de Catalunya, 2017-10-27)
Treball Final de Grau
Accés restringit per acord de confidencialitat -
A CFD study of an annular pilot plant reactor for Paracetamol photo-Fenton degradation
(Elsevier, 2021-04-15)
Article
Accés obertThis work studies in detail the photo-Fenton degradation process of Paracetamol (PCT) on an annular pilot-plant reactor using Computational Fluid Dynamics (CFD). A cylindrical lamp emission model was originally implemented ... -
A CFD-based surrogate model for predicting flow parameters in a ventilated room using sensor readings
(2022-07-01)
Article
Accés restringit per política de l'editorialIn this work, we develop a computational fluid dynamics (CFD)-based surrogate model, which predicts flow parameters under different geometrical configurations and boundary conditions in a benchmark case of a mechanically ... -
A Chandrasekhar mass progenitor for the type Ia supernova remnant 3C 397 from the enhanced abundances of nickel and manganese
(2015-03-12)
Article
Accés restringit per política de l'editorialDespite decades of intense efforts, many fundamental aspects of Type Ia supernovae (SNe Ia) remain elusive. One of the major open questions is whether the mass of an exploding white dwarf (WD) is close to the Chandrasekhar ... -
A channel allocation algorithm for OSA-Enabled IEEE 802.11 WLANs
(2009-09)
Text en actes de congrés
Accés obertChannel allocation problem is a major challenge in wireless local area networks (WLANs), especially in dense deployments of access points (APs) where congestion of the unlicensed spectrum bands (i.e., ISM bands) could ... -
A channel allocation algorithm for OSA-Enabled IEEE 802.11 WLANs
(2009)
Text en actes de congrés
Accés obertChannel allocation problem is a major challenge in wireless local area networks (WLANs), especially in dense deployments of access points (APs) where congestion of the unlicensed spectrum bands (i.e., ISM bands) could ... -
A channel characterization technique for HF communications
(1985)
Text en actes de congrés
Accés obertA wideband channel sounder to characterize the HF radio channel is described. Based on a pseudorandom sequence technique it allows the measurement of the complex impulsional response of the channel with time and frequency ... -
A chaotic secure communication scheme based on duffing oscillators and frequency estimation
(2013)
Text en actes de congrés
Accés obertThis work presents a new technique to securely transmit and retrieve a message signal via chaotic systems. In our system, a two-valued message signal modulates the frequency of a Duffing oscillator sinusoidal term. An ... -
A chaotic secure communication system design based on iterative learning control theory
(Multidisciplinary Digital Publishing Institute, 2016-10-01)
Article
Accés obertThis paper presents an application of Iterative Learning Control (ILC) theory to secure communication system design by using chaotic signals, where the logistic-map is employed as a source of chaos. Meanwhile, the ILC ... -
A characterisation of the academic profile of a community of professors involved in sustainable human development : the case of the Global Dimension in Engineering Education
(2016)
Comunicació de congrés
Accés obertIn the last decade, a number of technical universities and engineering faculties have been engaged in different initiatives aimed at integrating sustainable development in their functions. Academic staff engagement in ... -
A characteristic length scale for density gradients in supercritical monocomponent flows near pseudoboiling
(2020-12)
Report de recerca
Accés obert -
A characterization for residuated implications on J [0, 1]. Application to the L-fuzzy concept theory.
(Universitat Politècnica de Catalunya. Secció de Matemàtiques i Informàtica, 2005)
Article
Accés obertIn this paper, a new characterization for the interval-valued residuated fuzzy implication operators is presented, with which it is possible to use them in a simple and efficient way, since the calculation of the values ... -
A characterization of hysteresis systems
(2012)
Comunicació de congrés
Accés restringit per decisió de l'autorHysteresis is a nonlinear phenomenon exhibited by systems stemming from various science and engineering areas. To detect experimentally the presence of hysteresis in a system, the graph output versus input of the system ...