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 20 of 27 for “"On-line monitoring"”.
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On-line monitoring of water quality parameters
Chapter one summarises the development of UK legislation for the protection of the aquatic environment, and highlights current EC legislative requirements for water quality. The need for on-line water quality monitoring and the alternative instrumental approaches to it are discussed, together with …
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On-Line Monitoring, Control, and Reliability of Structural Dynamical Systems
"Ideas for improving the efficiency of Monte Carlo simulation (MCS) is the subject of the final section. Determining the low failure probabilities of typical engineering systems is quite difficult without using millions of MCS realizations to characterize the probability distribution. Several links …
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An optimization of on-line monitoring of simple linear and polynomial quality functions
<p>This research aims to introduce a number of contributions for enhancing</p> <p>the statistical performance of some of Phase II linear and polynomial profile monitoring techniques.</p> <p>For linear profiles the idea of variable sampling size (VSS) and variable</p> <p>sampling interval (VSI) have …
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Development and application of a new voltage stability index for on-line monitoring and shedding
… past decades, voltage instability was the reason behind several major blackouts worldwide. Continuous assessment of the system voltage stability is vital to ensure a secured operation of the system. Several voltage stability indicators have been proposed and used in an attempt to quantify …
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Laser weld pool optical diagnostics: Topography and visualization used for surface contour analysis and process monitoring
This experimental investigation into shallow laser welding describes new techniques for visualizing, measuring dimensions, and mapping the deformation of the weld pool free surface. The first known measurements of the molten surface contour have been obtained, analyzed, and compared with predicted …
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Process potentiometric sequential injection titrations
Interest in the automation of titration arise from the fact that many acid-base titrations in the process industries rely on manual titration which is time consuming. Miniaturization of these titration processes becomes attractive because of the reduced reagent consumption. These industries must …
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A Hierarchical Filtering-Based Monitoring Architecture for Large-scale Distributed Systems
<p>On-line monitoring is essential for observing and improving the reliability and performance of large-scale distributed (LSD) systems. In an LSD environment, large numbers of events are generated by system components during their execution and interaction with external objects (e.g. users or …
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Mullite Membrane Reference Electrode Evaluation and Application for Ni-Cr Corrosion Behavior in High Temperature Chloride Salts
… as coolants or fuels are a promising option for advanced nuclear reactors, but the extreme temperatures and corrosivity of molten salts pose a challenge for implementation. Molten MgCl2-NaCl-KCl is a viable candidate for MSRs that is considered in this work. Thermochemical properties are …
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Upflow anaerobic sludge blanket reactors for treatment of wastewater from the brewery industry
Anaerobic digestion can be utilized to convert industrial wastewater into clean water and energy. The goal of this project was to set up lab-scale anaerobic digesters to collect data that will be used to develop and validate a predictive monitoring and controls solution to improve digester …
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Applications of optical fiber sensors with thick metal coatings
… fiber optic strain sensors have begun to transition from use in laboratory research to commercial sector applications. This transition is somewhat hindered due to the high cost associated with many optical components required for fiber optic-based sensing systems. Multiplexing systems for fiber …
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Characterising water treatment works performance using fluorescence spectroscopy
… matter (OM) in drinking water treatment is a common impediment responsible for increased coagulant and disinfectant dosages, formation of carcinogenic disinfection-by products (DBPs), and microbial re-growth in distribution system. The inherent heterogeneity of OM implies the utilization of …
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Double-frequency stator core vibration in large two-pole turbogenerators
… development of a model to represent the variation with load and excitation of double-frequency stator core vibration in large two-pole turbogenerators. The model has a dual purpose, serving first to investigate causes of this effect; secondly to provide predictions suitable for an on-line …
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Expert systems in A.C. induction motor fault diagnosis.
… research has produced reliable techniques for non-invasive, on-line monitoring and fault diagnosis of large induction motors. Human knowledge and experience has to be used in conjunction with these techniques in order to circumvent the problem of unavailable or uncertain data and to make …
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Development of micro-scale and automated membrane extraction systems for water analysis
Monitoring of trace level contaminants in water involves the extraction and enrichment of analytes. Over the years several techniques have been developed for this purpose. Currently there is an urgent need for the development of micro-scale extraction techniques that can lead to simple, fast trace …
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Studies of Monitoring and Diagnosis Systems for Substation Apparatus
Substation apparatus failure plays a major role in reliability of power delivery systems. Traditionally, most utilities perform regular maintenance in order to prevent equipment breakdown. Condition-based maintenance strategy monitors the condition of the equipment by measuring and analyzing key …
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Development of a video-based slurry sensor for on-line ash analysis
The implementation of process control in fine coal processing operations has traditionally been limited by the lack of adequate on-line ash sensors. Several nuclear based analyzers are available, yet none have seen widespread acceptance by the coal industry. This is due largely to their high cost, …
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Enhancing Micro Free Flow Electrophoresis: Detection, Application, And Fabrication
… Free Flow Electrophoresis (µFFE) is a separation technique where analytes are moved through a planar separation channel via pressure driven flow. Analytes streams are deflected laterally within an electric field applied perpendicular to the flow and separated from one another based on …
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Development of membrane extraction techniques for water quality analysis
… aspects of water quality analysis. Gas injection membrane extraction was developed for fast on-line analysis of volatile organic compounds in water. Gas injection of aqueous samples increased the speed of membrane extraction. The aqueous boundary layer effects encountered during water elution …
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Acoustic sensing of renal stone fragmentation in extracorporeal shockwave lithotripsy
… describes the research carried out by the author on the exploitation of acoustic emissions detected during extracorporeal shockwave lithotripsy (a non-invasive procedure for the treatment of urinary stones) to develop a new diagnostic system. The work formed part of a research project on …
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Applications of Power Electronic Converter Based Wideband System Identification in Grid Tied AC Power Systems
<p>Digital control platforms have become extremely powerful in terms of computational performance even as costs have diminished. However, the control architecture footprint for power electronic converters has remained consistent while the processing capabilities of such devices have improved …
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