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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Modelling uncertainty and expert judgement

Butterworth, N. J. January 1987 (has links)
This thesis investigates methods of modelling problems containing uncertainty, paying particular attention to situations where there is hole empirical data and the modeller chooses to employ subjective expert assessments. In chapter 1 we examine the historical and philosophical underpinnings of subjective probability, discuss how it can be used in practical situations and investigate some of the typical errors associated with eliciting expert assessments. We describe an experiment in which experts assess multi-outcome events with which they are familiar and examine whether they suffer from the same types of assessment errors as naive subjects tend to exhibit As a foundation for our further experiments we discuss the methods and procedures which other practitioners have adopted for eliciting expert judgements and examine how conflicting assessments might be resolved into a coherent position. Chapter 2 investigates ways in which univariatc uncertainty can be quantified and modelled. We conduct an experiment on the elicitation of means and variances for a variety of real distributions and procedures suggested in previous studies. The standard methods of representing random variables with differential equations, series expansions, transformations and inverse functions are discussed and we develop a new functional form for simulation studies. This NB function is both more flexible and computationally faster than the standard alternatives. We have also developed interactive software for the elicitation and quantification of a variable in this NB functional form and describe an experiment to verify this approach. Chapter 3 develops the univariate approaches of chapter 2 for applications involving dependent variables. We first discuss the standard methods of representing multivariate distributions and highlight their limitations. Having examined the requirements of a multivariate representation suitable for simulation and expert elicitation, we develop two approaches based upon the NB functions already described and dependence measures. These are compared with various standard forms, fitting them to both theoretical and real distributions, with some very promising results. Finally we describe an experiment in which we subjectively elicit measures of dependence for a number of real distributions, comparing the accuracy and acceptability of the various techniques.
62

Advances in probabilistic modelling

Oldfield, Martin John January 1995 (has links)
No description available.
63

Stochastic techniques for time series with applications to materials accountancy

Russell, N. S. January 1985 (has links)
No description available.
64

Computer-based musical composition using a probabilistic algorithmic method

Chapman, Gary January 2000 (has links)
No description available.
65

Predictive distributions in binary models with missing data

Hentges, Adao Luiz January 1995 (has links)
No description available.
66

Some contributions to characterization theory

Alzaid, Abdulhamid Abdullah January 1983 (has links)
No description available.
67

Phase transitions in one dimensional random fields

Hope, Peter January 1988 (has links)
No description available.
68

Probabilistic communicating processes

Seidel, Karen January 1992 (has links)
No description available.
69

Asymptotic behaviour of some measure-valued diffusions

Etheridge, Alison Mary January 1989 (has links)
No description available.
70

Bayesian analysis of inverse problems in physics

Johnston, John C. January 1996 (has links)
No description available.

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