Browsing University of Hertfordshire by Title
Now showing items 16184-16203 of 24471
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Optimisation of Transmission Bandwidth for Cellular Indoor Optical Wireless Communications System Using a Dynamic Handover Decision-Making Algorithm
(2012-07)In this paper, we propose a novel cellular optical wireless communications (COWC) system with four diffused cells. A dynamic handover scheme is proposed to make the link more flexible by the way of adaptive channel allocation ... -
Optimised Adaptation of Mixed-criticality Systems with Periodic Tasks on Uniform Multiprocessors in Case of Faults
(2015-04)The standard real-time computing model is based on a notion of deadline that represents both, a design parameter and a critical latency. The tolerance-based real-time com- puting model (TRTCM) extends the standard real-time ... -
Optimised Residential Loads Scheduling Based on Dynamic Pricing of Electricity : A Simulation Study
(2013)This paper presents a simulation study which addresses Demand Side Management (DSM) via scheduling and optimization of a set of residential smart appliances under day-ahead variable pricing with the aim of minimizing the ... -
Optimising a hierarchical neural clusterer applied to large gene sequence data sets
(Institute of Electrical and Electronics Engineers (IEEE), 2004)Evolutionary Algorithms have been used to optimise the performance of neural network models before. This paper uses a hybrid approach by permanently attaching a Genetic Algorithm (GA) to a hierarchical clusterer to investigate ... -
Optimising a neural tree classifier using a genetic algorithm
(2000)This paper documents experiments performed using a GA to optimise the parameters of a dynamic neural tree model. Two fitness functions were created from two selected clustering measures, and a population of genotypes, ... -
Optimising a Neural Tree Using Subtree Retraining
(2004)Subtree retraining applied to a Stochastic Competitive Evolutionary Neural Tree model (SCENT) is introduced. This subtree retraining process is designed to improve the performance of the original model which provides a ... -
Optimising Cooperative Spectrum Sensing in Cognitive Radio Networks Using Interference Alignment and Space-Time Coding
(2018-03-04)In this thesis, the process of optimizing Cooperative Spectrum Sensing in Cognitive Radio has been investigated in fast-fading environments where simulation results have shown that its performance is limited by the Probability ... -
Optimising fungicide timing for controlling light leaf spot (Pyrenopeziza brassicae) on winter oilseed rape in the UK
(Association of Applied Biologists, 1999) -
Optimising oceanic rainfall estimates for increased lead time of stream level forecasting: A case study of GPM IMERG estimates application in the UK
(2024-04-19)Among the three main rainfall data sources (rain gauge stations, rainfall radar stations and weather satellites), satellites are often the most appropriate for longer lead times in real-time flood forecasting [1]. This is ... -
Optimising poly(lactic-co-glycolic acid) microparticle fabrication using a Taguchi orthogonal array design-of-experiment approach
(2019-09-26)The objective of this study was to identify, understand and generate a Taguchi orthogonal array model for the formation of 10–50 μm microparticles with applications in topical/ocular controlled drug delivery. Poly(lactic ... -
Optimising the use of fungicides to control stem canker of oilseed rape
(1999)Ascospores of Leptosphaeria maculans infect leaves of oilseed rape to cause leaf spots, from which the fungus can grow to infect the stem. Yield losses due to early senescence and lodging result if the stem infections reach ... -
Optimization and automatic differentiation in Ada : some practical experience
(1994)This paper describes an investigation into the performance of three Ada packages for automatic differentiation. Two of these implement the forward accumulation approach while the third employs reverse accumulation. Each ... -
Optimization of 3D ZnO brush-like nanorods for dye-sensitized solar cells
(2018-03-09)In a dye-sensitized solar cell (DSSC) the amount of adsorbed dye on the photoanode surface is a key factor that must be maximized in order to obtain enhanced DSSC performance. In this study 3D ZnO nanostructures, named ... -
Optimization of airflow organization in fan-wall data center via baffles
(2024-02-16)The utilization of natural fresh air for cooling server rooms in fan-wall data centers effectively reduces the operational duration of air conditioning, resulting in enhanced energy efficiency. Nonetheless, there are few ... -
The Optimization of Combined Power-Power Generation Cycles
(University of Hertfordshire, 2015-02-02)An investigation into the performance of several combined gas-steam power generating plants’ cycles was undertaken at the School of Engineering and Technology at the University of Hertfordshire and it is predominantly ... -
Optimization of diffuser/nozzle elements for rectification valveless micropumps
(American Society of Mechanical Engineers (ASME), 2011)There has been a growing interest in understanding the flow behaviour inside diffuser/nozzle elements in order to identify performance characteristics of these elements for micropump applications. Flat-walled diffuser/nozzle ...