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.
Results
Showing 1 to 20 of 27 for “"Optimisation procedure."”.
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A new optimisation procedure for uncertainty reduction by intelligent wells during field development planning
… arise while using commercial software for optimisation of a typical, modern field with multiple reservoirs and a complex surface production network. Inclusion of the optimisation algorithm dramatically increases the calculation time in addition to showing stability and convergence problems. …
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Tools for the formation of optimised X-80 steel blast tolerant transverse bulkheads
… bulkhead to air blast loads. Finally, an optimisation procedure was developed that met all the design criteria and its relevant requirements. This optimisation procedure was implemented with the available data, to show the potential to develop optimised X-80 steel blast tolerant transverse …
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Structural fatigue assessment and optimisation of offshore wind turbine jacket foundations.
… innovative jacket designs by applying a topology optimisation algorithm. The research demonstrates the use of advanced computational techniques to improve existing designs by enhancing structural integrity and fatigue life whilst reducing the mass. The research presents a comprehensive …
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Approximation of prices for average-type options via bounds
… with a closely related proxy and use an optimisation procedure to tighten up the bounds. The result is a pricing tool that provides accurate approximations without suffering from the exponential curse of dimensionality associated with other techniques. The method is developed for …
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Optimum design of structures with stability constraints using the evolutionary optimisation method
In the past most of the works on structural optimisation have been based on either mathematical programming or optimality criteria methods and have mainly concentrated on static responses of structures. These optimisation methods are mathematically complex and have limited applications. A novel …
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Constructing volatility surfaces for managed funds
… the risk-neutral skewness of the fund. An optimisation procedure is then used to determine the volatility smile of the fund for a specific maturity. Thereafter, the volatility surface of the fund is constructed by repeating each step for different maturities. Although this methodology …
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The development of intelligent hull forms of large ships for energy efficient transportation
… including computational fluid dynamics (CFD) procedures. The use of CFD for ship performance analyses is becoming more popular in the maritime industry due to its cost-effective capabilities. The continuous development of numerical simulation (CFD) as well as high performance computing opens …
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Feasibility analysis of using special purpose machines for drilling-related operations
… This thesis introduces a feasibility analysis procedure developed to support decision-making through the assessment of the strengths and limitations of SPMs. To achieve this, technical and economic feasibility analyses, a sensitivity analysis, and an optimisation model were developed and a case …
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Predicting fan noise propagation in aeroengine bypass ducts
… be taken into account when performing impedance optimisations. A new optimisation procedure is proposed in which b-induct predictions are used within an existing whole aircraft noise prediction model. This procedure is used to select liner impedances for a modern engine bypass duct. B-induct is …
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Vibration Energy Harvesting for the Development of autonomous monitoring Systems. Application to railway Bridges
… The research focuses on the modelling, optimisation, and validation of piezoelectric (PEH) and magnetoelastic (MEH) energy harvesters, with particular emphasis on their application to railway bridges. Analytical lumped-parameter models are derived from a variational formulation for …
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Equilibration of deep neural networks and carrier chirality in Rashba systems
… of two parts: the first part deals with the optimisation of deep neural networks, whereas the second part with the decay of non-equilibrium states in strongly Rashba-coupled systems at low temperature. Deep learning is a conceptually simple, highly effective, and widely used tool, yet there …
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Evolutionary design of digital trajectory-tracking controllers for robotic manipulators
… robotic manipulators.However, these theoretical optimisation results for digital PID controllers are only valid as sampling periods become vanishingly small. In practice, of course, the sampling periods of digital controllers remain non-zero; but, in such cases, no theoretical optimisation …
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Development of a vehicle dynamics controller for obstacle avoidance
… is obtained using a multi-stage convex optimisation procedure. The overall controller performance is validated by simulation using a complex proprietary model of the vehicle that is reported to have been validated and calibrated against experimental data over several years of use in an …
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Detailed and Practical 3D Reconstruction with Advanced Photometric Stereo Modelling
… Stereo models possible and variational optimisations for these kinds of models show remarkable resilience to real world imperfections such as non-Gaussian noise and other outliers. Thus, a highly accurate, photometric-based reconstruction system is now possible. The contribution of this …
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Polyhedral Computation for Differential System Analysis and Control
… refine a candidate polyhedron through a local optimisation procedure. This allows for a fine-tuned trade-off between conservativeness and computational tractability and can be used for both analysis and design. For each of the problems considered we also include numerical case studies that …
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A framework for smart traffic management using heterogeneous data sources
… network. The simulator component proposes an optimisation procedure for determining missing roundabouts and urban roads flow distribution using constrained optimisation. Existing imputation methodologies have been developed on straight section of highways and their applicability for more …
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Modelling and development of thermo-mechanical energy storage
… of the various cycles. For this reason, an optimisation procedure is developed to obtain heat exchanger designs that minimise entropy generation for a given amount of material. These designs are used when estimating the costs of energy capacity and power capacity of each cycle. Results …
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Sustainability consideration in machining of 2½d milled features
… and recommend ways of improvement; (ii) Optimisation of existing manufacturing process which take energy as an additional factor in the optimisation of machining processes; and (iii) Development of new machining processes and technologies that move closer to the theoretical boundaries of …
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Digital processing of system responses
… of results.<br/><br/>A computational procedure using spectral methods and based on the fast Fourier transform is proposed, which considers a pseudo random binary sequence as a series of sine waves of 'discrete' frequencies of well defined amplitudes and phase …
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New methods and results in the optimisation of solar power tower plants
… and are formed of subsystems that are open to optimisation. This thesis is concerned with the development of new methods and results in the optimisation of SPT plants, with particular focus on operational optimi- sation. Chapter 1 provides background information on the energy sector, before …
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