Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Entropy methods"”.
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Modeling and estimation in Gaussian graphical models : maximum-entropy methods and walk-sum analysis
… our procedure from standard combinatorial methods. In our approach, we seek the maximum entropy relaxation (MER) within an exponential family, which maximizes entropy subject to constraints that marginal distributions on small subsets of variables are close to the prescribed marginals in …
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Evaluation of the space-time variability of soil salinity by statistical, geostatistical and bayesian maximum entropy methods
… development of statistical and geostatistical methods for the analysis of space time data and their application to soil salinity. Special emphasis was put on how to characterize soil salinity. Also, the focus was on three groups of methods, i.e. statistical, geostatistical and Bayesian maximum …
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Multichannel maximum entropy method of spectral analysis applied to offshore structures
The multichannel Maximum Entropy Method (MEM) of spectral analysis is developed and applied in the dynamic analysis of offshore structures. Two different algorithms are implemented and compared with the conventional Blackman-Tukey method. These are (1) a direct on the data or Burg method and (2) a …
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Computationally fast algorithms for ARMA spectral estimation
… approaches as the Box-Jenkins and maximum entropy methods. In this dissertation, fast recursive algorithmic implementations of the high performance method are developed. They are recursive in the sense that as a new element of the time series is observed, the parameters characterizing an …
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The Evolution of Efficiency in the Chinese Stock Market
… traditional economics and the complex systems’ methods are employed to evaluate market efficiency, with an additional focus on the effect of two parameter inputs (embedded dimension and noise filter) on entropy methods to improve their ability to detect phase transitions in stock market data. …
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Random Vector Generation on Large Discrete Spaces
… which is easily the most widely used amongst methods for general random vector generation. While NORTA enjoys such popularity, there remain issues surrounding its efficient and correct implementation particularly when generating random vectors having denumerable support. These complications …
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Shock phenomena for the one-dimensional Boltzmann equation and related kinetic problems
… to the mean-field equation and relative entropy methods. More precisely, we prove quantitative estimates on the growth in time of correlations between vortices, and we show that these vanish in the many particle limit, proving our result. The second part of this thesis concerns the …
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Peculiarities of crystal and magnetic structures of synthetic Co-olivine, Co 2 SiO 4
… were analysed using both Fourier and maximum-entropy methods. A tendency to an elongation of the valence electron density along the direction of the magnetic moments with decrease of temperature was found in agreement with an elongation of the magnetic ellipsoids obtained from polarized …