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Perfect necklaces
(Academic Press Inc Elsevier Science, 2016-09)
We introduce a variant of de Bruijn words that we call perfect necklaces. Fix a finite alphabet. Recall that a word is a finite sequence of symbols in the alphabet and a circular word, or necklace, is the equivalence class ...
Local power and size properties of the LR, Wald, score and gradient tests in dispersion models
(ELSEVIER SCIENCE BVAMSTERDAM, 2012)
We derive asymptotic expansions for the nonnull distribution functions of the likelihood ratio, Wald, score and gradient test statistics in the class of dispersion models, under a sequence of Pitman alternatives. The ...
Size and power properties of some tests in the Birnbaum-Saunders regression model
(ELSEVIER SCIENCE BV, 2011)
The Birnbaum-Saunders distribution has been used quite effectively to model times to failure for materials subject to fatigue and for modeling lifetime data. In this paper we obtain asymptotic expansions, up to order n(-1/2) ...
Exact special twist method for quantum Monte Carlo simulations
(American Physical Society, 2016-12)
We present a systematic investigation of the special twist method introduced by Rajagopal et al. [Phys. Rev. B 51, 10591 (1995)PRBMDO0163-182910.1103/PhysRevB.51.10591] for reducing finite-size effects in correlated ...
Numerical modeling of flow stress and grain evolution of an Mg AZ31B alloy based on hot compression tests
(2020-01-01)
Magnesium alloys offer a wide range of applications in modern lightweight structures, although the correct forming parameters need to be found to reach a good combination of fine microstructure and the required mechanical ...
Statistical tests for validating geostatistical simulation algorithms
(PERGAMON-ELSEVIER SCIENCE LTD, 2008-11)
Geostatistical simulation relies on the definition of a stochastic model (e.g. a random field characterized by the set of its finite-dimensional distributions), a spatial domain and an algorithm used to construct realizations ...
Histogram-based methodology for the determination of the critical point in condensation-evaporation systems
(IOP Publishing, 2017-07-28)
A methodology based on a combination of the histogram reweighting technique and the fourth order Binder cumulant was developed to determine the critical point in generalized condensation-evaporation systems. This methodology ...
Finite element modeling of microstructural changes in Al6063-O based on BP neural network
(Universidad de los AndesIngeniería MecánicaFacultad de IngenieríaDepartamento de Ingeniería Mecánica, 2019)
"The surface finish of the mechanized products is an influential factor in the functional performance of the piece. During machining, the surface grain size is modified; consequently, the mechanical properties of the surface ...
Tendencia aleatoria o determinística: una nueva prueba basada en la teoría tradicional
(Universidad Nacional de Colombia, 2009)
Several procedures to test the null hypothesis on the random or deterministic origin of the trend in a time series are found in the specialized literature. Most of these tests are based on the analysis of the unit roots ...