Assessment of a corroded pipe is crucial to determine when it must be repaired or replaced. However, the conventional corrosion assessment codes for failure pressure predictions pipes with circumferentially aligned interacting defects are conservative (underestimations more than 40%), resulting in premature repair replacements pipelines. Alternatively, numerical approaches may used, but they ti...

SUMMARY 3-D controlled-source electromagnetic data are often computed directly in the domain of interest, either frequency or time domain. Computing it one and transforming via a Fourier transform to other is viable alternative. It requires evaluation many responses computational if standard transforms used. This can make prohibitively expensive kernel time-consuming as case modelling. The spee...

OBJECTIVE To assess the importance of considering decision uncertainty, the appropriateness of probabilistic sensitivity analysis (PSA), and the use of patient-level simulation (PLS) in appraisals for the National Institute for Health and Clinical Excellence (NICE). METHODS Decision-makers require estimates of decision uncertainty alongside expected net benefits (NB) of interventions. This re...

Standard evolutionary optimization algorithms assume that the evaluation of objective and constraint functions is straightforward computationally cheap. However, in many real-world problems, these evaluations involve expensive numerical simulations or physical experiments. Surrogate-assisted (SAEAs) have recently gained increased attention for their performance solving types problems. The main ...

Engineering systems form the basis on which our day-to-day lives depend on. In many cases, designers are interested in identifying an optimal design of an engineering system. However, very often, the process of engineering design optimization is complex and involves time-expensive simulations or the need to satisfy not just one, but multiple objectives. This thesis aims to explore the area of e...