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 9 of 9 for “"periodic inspection"”.
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Acoustic Emission for Periodic Inspection of Composite Pressure Vessels
<p>Cost savings can be achieved in a wide range of applications by replacing the current procedure for hydrostatic recertification of high-pressure composite gas cylinders with acoustic emission (AE) nondestructive testing. Advantages of AE recertification over the current hydrostatic method …
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Optimal inspection and maintenance for stochastically deteriorating systems
… concerns the optimisation of maintenance and inspection for stochastically deteriorating systems. The motivation for this thesis is the problem of determining condition based maintenance policies, for systems whose degradation may be modelled by a continuous time stochastic process. Our …
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The effect of microstructure on the fatigue and fracture properties of vintage power rotor steels
… plant service. As part of normal maintenance, a periodic inspection by non-destructive evaluation (NDE) is performed to determine if flaws have developed, or progressed from pre-existing conditions, that exceed safe limits for operation. In 2008, after over fifty years of service at a power plant …
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A Quantum Technique for Monitoring Physical Layer Security of Optical Communication
… requires restricting access to the channel and periodic inspection of the link performance. In this thesis, we report how quantum communication techniques can be utilized to detect a physical layer attack. We present an efficient method for monitoring the physical layer security of a high data …
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Cumulative Sum Control Charts for Censored Reliability Data
… other instances, the data are collected through periodic inspection and only upper and lower bounds on the lifetimes are recorded. Reliability professionals use a number of non-normal distributions to model the resulting lifetime data with the Weibull distribution being the most frequently used. …
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Reliability Analysis And Optimal Maintenance Planning For Repairable Multi-Component Systems Subject To Dependent Competing Risks
… the generalized dependent latent age model, two periodic inspection-based maintenance polices are developed for a multi-component repairable system subject to dependent competing risks. The first maintenance policy assumes all the components are restored to as good as new once a failure detected, …
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Order Theory and Nonparametric Analysis for Interval Censored Data
… data arises when individuals can be subjected to periodic inspection at random moments, and their status (e.g. failed or functioning) is ascertained at each inspection. We exploit the order theoretic properties of interval orders to develop a new language describing interval censored data. We …
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Fatigue and fracture reliability and maintainability process for structural systems.
… can be improved by a maintenance program of periodic inspection and repair or replacement of damaged members. But there are also uncertainities introduced by the inspection process. In summary, the fatigue/fracture reliability and maintainability (FRM) process for a structural system is a …
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Failure Finding Interval Optimization for Periodically Inspected Repairable Systems
… standby units, underwater devices etc. If no periodical inspection is scheduled, and a hidden failure has already occurred, severe consequences may result. Research on periodical inspection seeks to establish the optimal inspection interval (Failure Finding Interval) of systems to maximize …