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 29 for “"Performance optimisation"”.
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Performance Optimisation of Dielectric Elastomer Generators
… the charge at a higher electric potential. The optimisation procedure for a load-driven soft planar DEG is presented, assuming hyperelastic and ideal dielectric behaviour. The DEG undergoes the ideal four-stroke electromechanical cycle previously described and its performance is evaluated on the …
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Performance optimisation through the use of compression garments and biosensors
… processes results in a reduction in sports performance and muscle power output alike. There were three main aims of the current study, and the first aim was to determine whether compression garments (CGs) affected cardiovascular function during exercise of running trainers. The second aim …
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Support-vector-machine based automatic performance modelling and optimisation for analogue and mixed-signal designs
… to an increasing requirement for high efficiency performance modelling and optimisation methodologies in AMS synthesis systems. Recently, the support vector machine (SVM) method has been introduced into this challenging field. This research has studied the application of SVMs to AMS performance …
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Model-based optimisation approaches for system energy performance improvement and evaluation
… aim of this PhD study is to provide model-based optimisation approaches for system energy performance improvement and evaluation, and such approaches can solve many energy performance related problems, for example, they are able to optimise conveyor belt system energy performance, avoid ramp rate …
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Pressure signature in adverse-pressure-gradient wall bounded turbulent flows
… becomes difficult for design purposes or performance optimisation. In most cases, turbulent separation reduces performance efficiency. There is a definite lack of turbulence data in the literature for adverse pressure gradient flows with and without separation. Hence, thorough experimental …
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The Physical and Physiological Demands of Taekwondo Training and International Competition
… the physical and physiological requirements for performance optimisation but it has yet to be demonstrated in the literature. The results demonstrated an increased physical demand of and physiological response to competition, compared to previous research. This change in physical and …
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Optimisation and algorithms in wireless networks for mission critical applications
… techniques in wireless network systems aiming at performance optimisation. This thesis provides contribution to knowledge on the following topics: (a) sum rate maximisation of two interfering users in an Orthogonal Frequency Division Multiple Access (OFDMA)-based cooperative base stations and (b) …
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Combustion efficiency improvement in a rotary furnance using a post combustion chamber
… with the case where no post combustor was used. Performance optimisation of the furnace was done by varying the fuel-air ratio and the size of the PCC. The flow characteristic results obtained, for the case of PCC and no PCC incorporated were contrasted. Flow characteristics were looked at in the …
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Combustion efficiency improvement in a rotary furnance using a post combustion chamber
… with the case where no post combustor was used. Performance optimisation of the furnace was done by varying the fuel-air ratio and the size of the PCC. The flow characteristic results obtained, for the case of PCC and no PCC incorporated were contrasted. Flow characteristics were looked at in the …
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The characterisation and optimisation of the zinc bromine hybrid redox flow battery
… pressure which ultimately was detrimental to the performance of the battery. This shows an even greater need to develop the additive chemistries to make use of the large surface areas offered by the felts. The activated carbon coating was found to be preferable with improved electrode kinetics and …
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State switching in multi-stable systems: control and optimisation.
… to a more efficient one, in order to achieve performance enhancement in real-life engineering systems. Multistable systems have more than one stable state under a set of parameters and the process of switching from an undesired state to a desired state is achieved by the proposed PD-like …
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The development of sub-25 nm III-V High Electron Mobility Transistors
… is growing incentive to explore the ultimate performance available from such devices. As with all FETs, the key to HEMT performance optimisation is the reduction of gate length, whilst optimally scaling the rest of the device and minimising parasitic extrinsic influences on device performance. …
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Development of novel redox stable anode materials and their suitability for use in intermediate temperature solid oxide fuel cells
… materials is deemed to be essential for SOFC performance optimisation at intermediate temperatures. Iron-based perovskites were previously overlooked as anode materials due to their instability in reducing atmospheres at SOFC operating temperatures, although substantial research has been …
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Improving Leader-Follower Formation Control Performance for Quadrotors
… the leader-follower team formation flight performance of Unmanned Aerial Vehicles (UAVs) by applying nonlinear robust and optimal techniques, in particular the nonlinear H_infinity and the iterative Linear Quadratic Regulator (iLQR), to stabilisation, path tracking and leader-follower team …
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Optimisation of a Modern Numerical Library: a Bottom-Up Approach
… centres on numerical library to describe the optimisation of computation at various levels. I present the low-level design of numerical operations and show the related impact on performance optimisation. I create new algorithms for key operations, and build an automatic tuning module to …
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Operating system support for warehouse-scale computing
… details, but enable introspection for performance optimisation. Fine-grained access control is supported by combining storable, communicable identifier capabilities, and context-dependent, ephemeral handle capabilities. Finally, multi-phase I/O requests implement optimistically …
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Automated synthesis of mixed-technology MEMS systems with electronic control
… and develops techniques for automated high-level performance optimisation and synthesis of mixed-technology MEMS systems.<br/><br/>Results of this research have been published in 9 papers at peer reviewed international conferences and one two-part journal paper. Specific contributions of this …
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Six degree of freedom active vibration isolation using quasi-zero stiffness magnetic levitation.
… trade-off between load capacity and isolation performance. Furthermore, in providing sufficient stiffness in the vertical direction to meet payload weight requirements, isolators are generally overly stiff in the remaining five degrees of freedom (DOF). In order to address the limitations of …
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Numerical study of a hybrid photovoltaic thermal desalination system
… been modelled with software for the purpose of performance optimisation, but most of them do not account for the still's view factor in the calculation of internal radiative heat transfer coefficient. The aim of this study was to construct a numerical model for a hybrid PV/T desalination system …
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