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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.
31

The exploratory analysis of reliability data

Walls, L. A. January 1987 (has links)
The thesis outlines the usual parametric analysis of field failure time data for repairable equipments. Due to shortcomings of this black-box approach, exploratory reliability analysis has been adopted to exploit the available data and so learn more about the physical failure process. Elements of exploratory analysis have appeared in recent statistical applications of point process, time series and multivariate methods in the area. These approaches are reviewed and investigated. Exploratory analysis of much field time between failure and limited repair time data for hardware equipments has been undertaken. Despite being from different physical mechanisms, software failure interval data has the same underlying statistical point process as such hardware data and has been similarly investigated. Simple graphs, often with simulation bounds, inference procedures for nonhomogeneous Poisson processes and Box-Jenkins analysis have been used to search for and model aspects of structure expected in reliability data. The appropriateness of the methods is discussed. As well as revealing that (constant) failure rates are often unsuitable summaries, exploratory analysis has highlighted features previously unknown or ignored. The identified time structures, data irregularities and other complexities are described. Exploratory analysis indicated potential dependent failures. A simulation-based graphical tool for highlighting these important events is described. Applications to real data have shown this is a promising approach. Principal coordinates and cluster analyses have been used to explore multivariate field data for automatic fire detection systems in an attempt to identify circumstances leading to false alarms. Data problems limited this analysis. Exploratory analysis has revealed it is common in reliability to assume a too simplistic model formulation compared with the true complex data structures. The implications of this for reliability data collection. storage and analysis are discussed. While an exploratory approach is generally successful, some specialisation of standard statistical methods for reliability is desirable.
32

A quantification of the effects of electricity supply interruptions

Morgan, A. J. January 1987 (has links)
No description available.
33

Reliable operation and recovery of self-checking sequential circuits

Wahieb, Bahir Mahmoud January 1990 (has links)
No description available.
34

An eigenstructure approach to the design of fault detection and isolation schemes for dynamic systems

Kang'ethe, S. M. January 1989 (has links)
No description available.
35

Reliability modelling and analysis of real-time systems

Perkins, Colin Stanley January 1996 (has links)
No description available.
36

The theory and design of a stochastic reliability simulator for large scale systems

Taleb, B. January 1988 (has links)
No description available.
37

Techniques to analyse system performance under uncertainty

Rocco, Claudio January 2000 (has links)
No description available.
38

Some aspects of common cause failure analysis in engineering systems

Games, A. M. January 1986 (has links)
No description available.
39

An investigation into the sensitivity of inferential statistics to data perturbations

Symons, E. J. January 1987 (has links)
No description available.
40

Integrated and systematic modelling of reliability

Purwantoro, Yudi January 2002 (has links)
No description available.

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