Exploració per tema "Stochastic processes"
Ara es mostren els items 21-40 de 86
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Detección de M señales gaussianas utilizando el desarrollo modificado de un proceso estocástico
(Institut d'Estadística de Catalunya, 2001)
Article
Accés obertUtilizando el desarrollo modificado de un proceso estocástico se propone una nueva metodología, alternativa a la basada en el desarrollo de Karhunen-Loeve, para el problema de detección de M señales Gaussianas en ruido ... -
Detección de rasgos en imágenes binarias mediante procesos puntuales espaciales marcados
(Institut d'Estadística de Catalunya, 2002)
Article
Accés obertEn este trabajo consideramos el problema de la detección de rasgos bajo la presencia de ruido en imágenes que tras un cierto tratamiento se reducen a binarias, por la presencia de dos tipos de elementos. Podemos encontrar ... -
Diffusion coefficient in periodic and random potentials
(2009)
Article
Accés obert -
Discrete-time retrial queue with Bernoulli vacation, preemptive resume and feedback customers
(OmniaScience, 2015-10)
Article
Accés obertPurpose: We consider a discrete-time Geo/G/1 retrial queue where the retrial time follows a general distribution, the server subject to Bernoulli vacation policy and the customer has preemptive resume priority, Bernoulli ... -
Distribution planning in a weather-dependent scenario with stochastic travel times: a simheuristics approach
(2019-02-04)
Article
Accés obertIn real-life logistics, distribution plans might be affected by weather conditions (rain, snow, and fog), since they might have a significant effect on traveling times and, therefore, on total distribution costs. In this ... -
Domain size distribution in a Poisson-Voronoi nucleation and growth transformation. Physical Review E
(American Physical Society, 2007-04-30)
Article
Accés obertRandom subdivisions of space originated in a nucleation and growth process are commonly observed in many scientific fields, such us metallurgy, geology, biology and ecology. One of the simplest of these processes is the ... -
Effective diffusion in a stochastic velocity field
(Springer Verlag, 1993-04-01)
Article
Accés restringit per política de l'editorialAnalytical results are derived for the effective dispersion of a passive scalar in a stochastic velocity field evolving in a fast time scale. These results are favorably compared with direct computer simulation of ... -
Effects of external global noise on the catalytic CO oxidation on Pt (110)
(American Institute of Physics (AIP), 2009-02-26)
Article
Accés obertOxidation reaction of CO on a single platinum crystal is a reaction-diffusion system that may exhibit bistable, excitable, and oscillatory behavior. We studied the effect of a stochastic signal artificially introduced into ... -
Embedding in law of discrete time ARMA processes in continuous time stationary processes
(2018-12-01)
Article
Accés obertGiven any stationary time series {Xn : n ¿ Z} satisfying an ARMA(p, q) model for arbitrary p and q with infinitely divisible innovations, we construct a continuous time stationary process {xt : t ¿ R} such that the ... -
Estimation of the spectral density of a homogeneous random stable discrete time field
(Institut d'Estadística de Catalunya, 2005)
Article
Accés obertIn earlier papers, 2π-periodic spectral data windows have been used in spectral estimation of discretetime random fields having finite second-order moments. In this paper, we show that 2π-periodic spectral windows can ... -
Estudi de comparació d’heurístiques per resoldre el problema de flux de tasques amb temps de procés estocàstics
(Universitat Politècnica de Catalunya, 2019-04-23)
Projecte Final de Màster Oficial
Accés obertThe flowshop problem is a scheduling problem where a set of jobs is processed by the same set of units or machines in the same order. A solution this problem specifies the order in which jobs are processed on each unit, ... -
Excitability transitions and wave dynamics under spatiotemporal structured noise
(2002-06-14)
Article
Accés obertWe present an analytic and numerical study of the effects of external fluctuations in active media. Our analytical methodology transforms the initial stochastic partial differential equations into an effective set of ... -
Experimental characterization of the transition to coherence collapse in a semiconductor laser with optical feedback
(Institute of Physics (IOP), 2017-11-01)
Article
Accés obertSemiconductor lasers with time-delayed optical feedback display a wide range of dynamical regimes, which have found various practical applications. They also provide excellent testbeds for data analysis tools for characterizing ... -
Extremes of periodic moving averages of random variables with regularly varying tail probabilities
(Institut d'Estadística de Catalunya, 2004)
Article
Accés obertWe define a family of local mixing conditions that enable the computation of the extremal index of periodic sequences from the joint distributions of kconsecutive variables of the sequence. By applying results, under local ... -
Fix-and-relax-coordination for a multi-period location-allocation problem under uncertainty
(2013-12)
Article
Accés restringit per política de l'editorialA multi-period discrete facility location problem is introduced for a risk neutral strategy with uncertainty in the costs and some of the requirements along the planning horizon. A compact 0–1 formulation for the Deterministic ... -
Frames: a maximum entropy statistical estimate of the inverse problem
(1997-01)
Article
Accés obertA maximum entropy statistical treatment of an inverse problem concerning frame theory is presented. The problem arises from the fact that a frame is an overcomplete set of vectors that defines a mapping with no unique ... -
Higher order colored noise effects in multivariable systems.
(American Physical Society, 1988-06-01)
Article
Accés obertWe extend the partial resummation technique of Fokker-Planck terms for multivariable stochastic differential equations with colored noise. As an example, a model system of a Brownian particle with colored noise is studied. ... -
Improvements on stochastic vector quantization of images
(. ICASSP, 1993)
Text en actes de congrés
Accés obertA novel nonadaptive fixed-rate vector quantizer encoding scheme is presented, and preliminary results are shown. The design of the codebook has been based on a stochastic approach in order to match a previously defined ... -
Interactions of Commitment and Discretion in Monetary and Fiscal Policies
(Universitat Politècnica de Catalunya / École Polytechnique Fédérale de Lausanne, 2008)
Projecte/Treball Final de Carrera
Accés restringit per acord de confidencialitat -
Langevin approach for the dynamics of the contact process on annealed scale-free networks
(2009-03-19)
Article
Accés obertWe study the dynamics of the contact process, one of the simplest nonequilibrium stochastic processes, taking place on a scale-free network. We consider the network topology as annealed, i.e., all links are rewired at each ...