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 16 of 16 for “"Gamma distributions"”.
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The use of gamma distributions to quantify the dependence of cloud particle size distributions in hurricanes on cloud and environmental conditions
… in such models make assumptions about the size distributions (SDs) of different ice species, such as cloud ice, graupel, and snow, which have typically not been based on observations obtained in TCs. The representativeness of these parameterizations for TCs is not well known. In this study, …
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Conditional distributions arising from variation of parameters in non-linear response functions
… were allowed to follow independent uniform distributions and independent gamma distributions.
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Analysis of increases in fishing power in the western rock lobster (Panulirus cygnus) fishery
… linear modelling. A comparison of the normal and gamma distributions as the specified probability distribution in the model will be made .
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Semi-Parametric Likelihood Functions for Bivariate Survival Data
… characterization of multivariate survival distributions is still a growing area of research. The aim of this thesis is to investigate a joint probability distribution that can be derived for modeling nonnegative related random variables. We restrict the marginals to a specified lifetime …
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Bayes and minimum variance unbiased estimators of reliability using the truncated Weibull life testing model
… the general uniform, exponential, and inverted gamma distributions as prior probability density functions for the parameter θ, We shall also derive the minimum variance unbiased estimator (MVUE). For each prior probability density function, the Bayes estimator is compared with the MVUE by Monte …
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Estimation in truncated distributions
… Estimation of the parameters from truncated distributions has been an open field for research. This thesis examines the developments which have taken place in this area, giving the major writers and the methods used by them to obtain estimators. A. C. Cohen is responsible for much work …
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Optimal part delivery dates in small lot stochastic assembly systems
… are assumed to follow various known probability distributions. The model includes consideration of limited buffers between stations. The overall objective is to minimize the expected total of part and subassembly inventory cost, makespan cost and tardiness cost. An approach based on the …
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Fade Statistics For A Lasercom System And The Joint Pdf Of A Gamma-gamma Distributed Irradiance And Its Time Derivative
… were developed for the joint PDF of a gamma-gamma distributed irradiance and its time derivative, and the corresponding expression for the expected number of fades per second. The new approximation for the conditional PDF of the time derivative of a gamma-gamma irradiance is a zero mean …
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An Uncertainty-Based Approach to the Total Maximum Daily Load Development
… determine the prior, likelihood, and posterior distributions of uncertainties involved in Bayesian approach, various probability density functions are derived. The temperature measurement induced uncertainty in dissolved oxygen simulation is found to be normally distributed. The temporal scale …
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The calculation of cloud parameters from AVHRR data
… is contained in an ensemble of modified-Gamma distributions whose effective radius varies from 1 to 30 μm with a fixed dispersion of 0.25. A technique is established which allows effective cloud radius to be estimated from 3.7 μm AVHRR/2 imagery. The radiation values at 0.65 μm and 11.8 …
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Monte Carlo Simulation Models to Enhance Air Cargo Network Resilience and Sustainability
… flights and airport capacities paired with Gamma distributions (capacity variability) and Poisson processes (arriving and departing flight disruption). The distributions were calibrated to empirical data so that network behavior drives simulation outcomes. The resulting key performance …
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Modelling of Rainfall Drop Size Distributions for Application in Fade Prediction on Earth-Space Paths
… thesis fits the standard lognormal and gamma distributions to one-minute slices of rainfall DSDs captured between 2003 and 2013 at the Chilbolton Observatory in southern England. Unlike previous studies, goodness-of-fit of the models is tested by calculating chi-square goodness-of-fit …
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A cost benefit analysis of operational risk quantification methods for regulatory capital
… Weibull, Burr, Generalized Pareto, Pareto and Gamma distributions were considered, whilst the Poisson distribution was used for modelling operational loss frequency. The Kolmogorov-Smirnov and Akaike information criterion tests were respectively used for assessing the level of distribution fit …
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Assessing variability in standardised harvest rates from shore-based recreational fishing surveys
… families, including the zero-altered gamma (ZAG) and Tweedie models, to account for differences in catch distributions among species and the high prevalence of fishing events where no catch was reported. A single model, with specific distribution and significant factors, was selected …
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Nonlinear dynamics of complex fluids in fragmentation and fracture
… for viscoelastic sprays. Second, the size distributions measured in each viscoelastic fragmentation process show a systematic broadening from the Newtonian solvent. In each case the droplet sizes are well described by Gamma distributions that correspond to an underlying …
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Συμβολή στη στατιστική συμπερασματολογία για τις κατανομές γάμα και αντίστροφη κανονική με χρήση της εμπειρικής ροπογεννήτριας συνάρτησης
Το αντικείμενο της παρούσας διατριβής είναι η διερεύνηση μεθόδων στατιστικής συμπερασματολογίας για την προσαρμογή και έλεγχο της κατανομής γάμα και της αντίστροφης κανονικής (inverse Gaussian) κατανομής σε δεδομένα με θετική λοξότητα. Τα πρότυπα αυτά χρησιμοποιούνται ευρέως στην ανάλυση …