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 6 of 6 for “"phase type distribution"”.
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Longitudinal Joint Modelling Utilising the Coxian Phase-type Distribution
… <br/> <br/>Within this thesis, the Coxian phase-type regression model is explored as a novel approach to represent the survival process within a joint model. Phase-type distributions, in general, are a diverse family of distributions which describe the absorption times of a continuous time …
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Sequential estimation of optimal age replacement policies when distribution of lifetimes is phase type.
… after failure (unplanned). In this thesis, the distribution of lifetimes is a known, increasing failure rate phase type distribution. To find the optimal age of replacement, the parameters of the underlying phase type distribution must be estimated. An optimal age sequential estimation procedure …
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Analysis and Approximations of Time Dependent Queueing Models
… the model-specified general input processes and distributions by processes and distributions from the more computationally friendly family of phase-type processes and distributions. We develop numerical approximation methods for analysis of general time-dependent queueing nodes by introducing new …
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Prediction of waiting time for entities in independent and merged queues using Markov chain and machine learning techniques
… words, the system contains three servers and the distributions of arrival and service times are exponential. A dimension reduction method is used to convert the transition matrix from two-infinite dimensional to a one-infinite dimensional matrix with the help of Phase-type distribution. After …
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Reliability Analysis and Optimization of Systems Containing Multi-Functional Entities
… analysis is how to determine the failure distribution of components. This is especially significant for multi-functional entities as more levels of redundancy are considered. We provide an automated model-selection method to construct the best phase-type (PH) distribution for a given data …
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Knowledge Discovery from Complex Event Time Data with Covariates
… such as reliability engineering, complex types of data are encountered which require novel methods of statistical analysis. Handling covariates properly while managing the missing values is a challenging task. These type of issues happen frequently in reliability data analysis. …