Exploració per tema "Markov processes"

Ara es mostren els items 21-40 de 108

    • Bounding steady-state availability models with group repair and phase type repair distributions 

      Carrasco, Juan A. (1999-05)
      Article
      Accés obert
      We propose an algorithm to obtain bounds for the steady-state availability using Markov models in which only a small portion of the state space is generated. The algorithm is applicable to models with group repair and ...

    • Bounding steady-state availability models with phase type repair distributions 

      Carrasco, Juan A. (1998)
      Comunicació de congrés
      Accés obert
      We propose a method to obtain bounds for the steady-state availability using Markov models in which only a small portion of the state space is generated. The method is applicable to models with phase type repair distributions ...

    • Cadenas de Markov : métodos cuantitativos para la toma de decisiones III 

      Fonollosa Guardiet, Juan Bautista; Sunyer Torrents, Albert; Sallán Leyes, José María; Fernández Alarcón, Vicenç (Universitat Politècnica de Catalunya. Iniciativa Digital Politècnica, 2016)
      Llibre
      Accés obert
      Esta obra forma parte de la colección Métodos cuantitativos para la toma de decisiones que, en su conjunto, permite resolver una amplia variedad de problemas. Cada volumen de esta colección desarrolla la técnica específica ...

    • Characterisation of radio access network slicing scenarios with 5G QoS provisioning 

      Vilà Muñoz, Irene; Pérez Romero, Jordi; Sallent Roig, Oriol; Umbert Juliana, Anna (Institute of Electrical and Electronics Engineers (IEEE), 2020-03-13)
      Article
      Accés obert
      5G systems are envisaged to support a wide range of application scenarios with variate requirements. To handle this heterogeneity, 5G architecture includes network slicing capabilities that facilitate the partitioning of ...

    • Closed form transient solution of continuous time Markov chains through uniformization 

      Cerdà Alabern, Llorenç (Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering (ICST), 2013)
      Comunicació de congrés
      Accés obert
      This paper derives a mapping between a close form transient solution of a continuous time Markov chain (CTMC), and a close form transient solution of one of its uniformized discrete time Markov chains. This result is used ...

    • Comment on "Performability analysis: a new algorithm" 

      Suñé, Víctor; Carrasco, Juan A.; Nabli, H; Sericola, B (2010-01)
      Article
      Accés obert
      The paper “Performability Analysis: A New Algorithm” describes an algorithm for computing the complementary distribution of the accumulated reward over an interval of time in a homogeneous Markov process. In this comment, ...

    • Comparación de la explicación obtenida con modelos de explicabilidad para diferentes métodos de Reinforcement Learning 

      Rivera Hernández, Javier (Universitat Politècnica de Catalunya, 2022-06-28)
      Treball Final de Grau
      Accés obert
      El creciente uso de las tecnologías de Inteligencia Artificial para proveer productos y servicios destinados a humanos ha aumentado el interes en como estas tecnologías toman decisiones que pueden tener un grave impacto ...

    • Computation of absorption probability distributions of continuous-time Markov chains using regenerative randomization 

      Carrasco, Juan A.; Calderón, A (Institute of Electrical and Electronics Engineers (IEEE), 1995)
      Text en actes de congrés
      Accés obert
      Randomization is a popular method for the transient solution of continuous-time Markov models. Its primary advantages over other methods (i.e., ODE solvers) are robustness and ease of implementation. It is however well-known ...

    • Computation of Bounds for Transient Measures of Large Rewarded Markov Models using Regenerative Randomization 

      Carrasco, Juan A. (2003-06)
      Article
      Accés obert
      In this paper we generalize a method (called regenerative randomization) for the transient solution of continuous time Markov models. The generalized method allows to compute two transient measures (the expected transient ...

    • Computing the expected Markov reward rates with stationarity detection and relative error control 

      Suñé, Víctor (Kluwer Academic Publishers, 2016-03-11)
      Article
      Accés obert
      By combining in a novel way the randomization method with the stationary detection technique, we develop two new algorithms for the computation of the expected reward rates of finite, irreducible Markov reward models, with ...

    • Demisyllable-based HMM spotting for continuous speech recognition 

      Lleida Solano, Eduardo; Nadeu Camprubí, Climent; Mariño Acebal, José Bernardo; Salavedra Molí, Josep (Institute of Electrical and Electronics Engineers (IEEE), 1991)
      Text en actes de congrés
      Accés obert
      The authors describe the acoustic processor of a Spanish continuous speech recognition system based on demisyllable units. The acoustic processor is based on a spotting algorithm which takes as input the unknown utterance, ...

    • Designing and modelling selective replication for fault-tolerant HPC applications 

      Subasi, Omer; Yalcin, Gulay; Zyulkyarov, Ferad; Unsal, Osman Sabri; Labarta Mancho, Jesús José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés obert
      Fail-stop errors and Silent Data Corruptions (SDCs) are the most common failure modes for High Performance Computing (HPC) applications. There are studies that address fail-stop errors and studies that address SDCs. However ...

    • Disseny i validació d’un model predictiu de l’evolució de la borsa amb cadenes de Markov 

      Barceló i Heras, Roger (Universitat Politècnica de Catalunya, 2015-09)
      Treball Final de Grau
      Accés obert
      Aquest treball tracta sobre les cadenes de Markov, més concretament aplicades a la borsa. En el primer punt es fa una breu introducció sobre què són i què fan els mercats financers, oferint algunes dades històriques i ...

    • Efficient implementations of the randomization method with control of the relative error 

      Suñé, Víctor; Carrasco, Juan A. (2005-05)
      Article
      Accés obert
      Randomization is a well-known numerical method for the transient analysis of continuous-time Markov chains. The main advantages of the method are numerical stability, well-controlled computation error and ability to specify ...

    • Efficient transient simulation of failure/repair markovian models 

      Carrasco, Juan A. (1991)
      Text en actes de congrés
      Accés obert
      Simulation methods have recently been developed for the solution of the extremely large Markovian dependability models which result from complex fault-tolerant computer systems. This paper presents efficient simulation ...

    • Embeddability and rate identifiability of Kimura 2-parameter matrices 

      Casanellas Rius, Marta; Fernández Sánchez, Jesús; Roca Lacostena, Jordi (2020-03-01)
      Article
      Accés obert
      Deciding whether a substitution matrix is embeddable (i.e. the corresponding Markov process has a continuous-time realization) is an open problem even for 4×4 matrices. We study the embedding problem and rate identifiability ...

    • Embeddability of Kimura 3ST Markov matrices 

      Roca Lacostena, Jordi; Fernández Sánchez, Jesús (2018-05-14)
      Article
      Accés obert
      In this note, we characterize the embeddability of generic Kimura 3ST Markov matrices in terms of their eigenvalues. As a consequence, we are able to compute the volume of such matrices relative to the volume of all Markov ...

    • Empirical Time-Dimension Model of Spectrum Use Based on a Discrete-Time Markov Chain With Deterministic and Stochastic Duty Cycle Models 

      López Benítez, Miguel; Casadevall Palacio, Fernando José (2011-07)
      Article
      Accés restringit per política de l'editorial
      The spectrum occupancy models widely used to date in dynamic spectrum access/cognitive radio (DSA/CR) research frequently rely on assumptions and oversimplifications that have not been validated with empirical measurement ...

    • Equivalence between Non-Markovian and Markovian Dynamics in Epidemic Spreading Processes 

      Gleeson, J P; Boguña Espinal, Marian; Starnini, Michele (American Institute of Physics (AIP), 2017-03-24)
      Article
      Accés obert
      A general formalism is introduced to allow the steady state of non-Markovian processes on networks to be reduced to equivalent Markovian processes on the same substrates. The example of an epidemic spreading process is ...

    • Expectation-maximization for evolutionary models 

      Cortada Garcia, Martí (Universitat Politècnica de Catalunya, 2023-06-29)
      Treball Final de Grau
      Accés obert
      Phylogenetics plays a crucial role in enhancing our understanding of molecular sequence evolution and is regarded as one of the most effective tools for studying the origin of contagious diseases. This thesis explores the ...