Exploració per tema "Matrius (Àlgebra)"
Ara es mostren els items 1-11 de 11
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A matrix derivation of a representation theorem for (trAp)1/p
(Universitat Politècnica de Catalunya. Centre de Càlcul, 1989)
Article
Accés obertA matrix derivation of a well-known representation theorem for (tr Ap)1/p is given, which is the solution of a restricted maximization problem. The paper further gives a solution of the corresponding restricted minimization ... -
A new approach to the spectral excess theorem for distance-regular graphs
(2009-04-01)
Article
Accés obertThe Spectral Excess Theorem provides a quasi-spectral characterization for a (regular) graph $\Gamma$ with $d+1$ different eigenvalues to be distance-regular graph, in terms of the mean (d-1)-excess of its vertices.\ The ... -
An open set of 4×4 embeddable matrices whose principal logarithm is not a Markov generator
(Taylor & Francis, 2020-12-17)
Article
Accés obertA Markov matrix is embeddable if it can represent a homogeneous continuous-time Markov process. It is well known that if a Markov matrix has real and pairwise-different eigenvalues, then the embeddability can be determined ... -
Contribuciones al análisis multiresolución de matrices de tráfico
(2009-09-15)
Text en actes de congrés
Accés restringit per política de l'editorialLas matrices de tráfico (TM) constituyen una información muy relevante para los operadores de red. Gran parte de las investigaciones sobre TMs se ha centrado en su inferencia a partir de medidas indirectas, pero no en ... -
El problema dels ponts de Köningsberg: idees per a l’aula
(Edicions de la Universitat de Barcelona, 2014-06)
Article
Accés obertAprofitem el problema dels ponts de Köningsberg per plantejar a l’alumnat una situació contextualitzada que ens permet treballar diferents aspectes, curriculars o no, de les matemàtiques. A més, seguint directament el fil ... -
Investigating the performance of SPSA in simulation-optimization approaches to transportation problems
(2018)
Text en actes de congrés
Accés obertWhile optimization models play a key role in transportation analysis, the objective function to be optimized, however, cannot always be defined analytically. It is therefore necessary to resort to non-differentiable ... -
Investigating the performance of SPSA in simulation-optimization approaches to transportation problems
(Elsevier, 2018-11)
Article
Accés obertWhile optimization models play a key role in transportation analysis, the objective function to be optimized, however, cannot be defined analytically. It is therefore necessary to resort to non-differentiable optimization ... -
Normal limiting distributions for systems of linear equations in random sets
(Elsevier, 2022-09-15)
Article
Accés obertWe consider the binomial random set model where each element in is chosen independently with probability . We show that for essentially all regimes of p and very general conditions for a matrix A and a column vector b, the ... -
Notes on the measure of the structural similarity of OD matrices
(2018-12-07)
Report de recerca
Accés obert -
The embedding problem for Markov matrices
(2023-01-01)
Article
Accés obertCharacterizing whether a Markov process of discrete random variables has a homogeneous continuous-time realization is a hard problem. In practice, this problem reduces to deciding when a given Markov matrix can be written ... -
The representation problem of pairs of symmetric second order tensors in the context of solid mechanics
(2003)
Report de recerca
Accés restringit per decisió de l'autor
