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 153 for “"Fast-response"”.
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Fast Response Liquid Crystal Devices
… (VOAs) and other tunable photonic devices. The response time of these devices is mainly determined by the employed liquid crystal material. How to obtain fast response for the LC devices is a fundamentally important and technically challenging task. In this dissertation, we investigate several …
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Optimization of a fast-response distribution network
… company is Zara, which is the world's largest "fast fashion" company: through unique and carefully integrated design, manufacturing and distribution processes, Zara routinely achieves design-to-shelf leadtimes of 6 weeks against an industry average of 6 months, and introduces 11,000 references …
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A Fast-Response Odor Chromatographic Sniffer (FOX)
This thesis in microscale gas chromatography (μGC) creates a paradigm shift in rapidly analyzing chemicals in the environment or analytes. We are looking for unexpected chemical changes that have been added purposefully or unintentionally. The work examines various aspects of μGC technology, …
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Protecting Our Investment: Solving Fast Response Cutter Corrosion
The USCG Fast Response Cutter (FRC) fleet is experiencing corrosion at an alarming rate in the propulsion shaft tunnels. An investigation into this problem was conducted from the perspectives of “root cause” and “prevention.” Root causes for the corrosion stem from an interaction in a complex, …
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A knowledge-based approach to modelling fast response catchments
… research in to flood forecasting on rapid response catchments, using knowledge based principles. Extensive use was made of high resolution single site radar data from the radar site at Hameldon Hill in North West England. Actual storm events and synthetic precipitation data were used in an …
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Modeling and Testing of Fast Response, Fiber-Optic Temperature Sensors
… of this work was to design, analyze and test a fast response fiber-optic temperature probe and sensor. The sensor is intended for measuring rapid temperature changes such as produced by a blast wave formed by a detonation. This work was performed in coordination with Luna Innovations …
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A fast response instrument to directly read the ratio of two electrical signals
Thesis: B.S., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1960
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Fast-Response Switching-Mode Power Converters/Amplifiers for Envelope Tracking Applications and Visible Light Communication
Uno de los principales desafíos en las redes inalámbricas actuales es el consumo energético. Por ejemplo, se estima que los transmisores de radiofrecuencia (RF) en infraestructuras 4G representan entre el 10% y el 30% del gasto operativo total, siendo los amplificadores de potencia RF (RFPAs) …
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Control strategies for exothermic batch and fed-batch processes A sub-optimal strategy is developed which combines fast response with a chosen control signal safety margin. Design procedures are described and results compared with conventional control.
… permitting a small runaway has resulted in a fast temperature response within the given safety margin. The Idea was employed for an exothermic single Irreversible reaction and also to a set of complex reactions. Both are carried out in a vessel with a heating/cooling coil. Two constraints are …
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Leak detection in power plant heat recovery steam generators utilizing medical radionuclides
… generating plant is operating increasingly in fast response mode to meet the variability of renewable generation. Fast power turn up and turn down is required to ensure grid frequency stability. Modern gas turbines operating in combined cycle mode can achieve fast response ramp rates typically …
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Oxygen Mass-Transfer in Tower Fermenters
… of oxygen mass—transfer in such systems using fast-response oxygen electrodes. Consideration has been given to ways of modelling the behaviour of fast-response probes and to the evaluation of mass-transfer coefficients from the results of unsteady-state experiments. The effects of gas …
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Managing Large Multidimensional Datasets Inside a Database System
To handle the huge data volumes and fast response time requirements in decision support applications, we develop an approximate query processing technique based on multidimensional wavelets. Our technique constructs compact synopses (comprising of wavelet coefficients) of the relevant database …
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Derivation of Parabolic Current Control with High Precision, Fast Convergence and Extended Voltage Control Application
… the waveform quality at steady state and the fast response at transient state. To improve the current control performance, quite a few nonlinear control strategies have been presented and one well-known strategy is the hysteresis current control. It achieves fast response without stability …
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High Performance Broadband Photodetectors Based on Graphene/Semiconductor Heterostructures
… photo-detecting platforms with broad spectral response from the deep-ultraviolet (UV) to the mid-infrared (MIR) regime. The recent state-of-the-art graphene-based photodetectors utilizing the combination of colloidal quantum dots (QDs) and graphene have been intensively studied, where QDs …
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Analysis and development of improved convertes for LED drivers with special focus on efficiency and dimming
… longer lifetime, higher efficacy, smaller size, fast response, robustness, reliability, and high color rendering index. The only drawback is that LEDs cannot be connected directly to the mains. Thus, it is fundamental to drive the LEDs through a current-controlled power supply. The aim of this …
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Two investigations of compressor stability : spike stall inception and transient heat transfer effects
… cascade, supported by unsteady computations. Fast-response pressure measurements at the blade tip show spike pre-cursors propagating in the cascade environment at a rate consistent with the low-speed compressor. The cascade design produces high incidence at the mid-span and fast-response …
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High-Resolution Thermal Measurements in Fluids
… in medical dosing systems. <br>Due to the fast response of the sensor to thermal actuation and its low power requirements with the subsequent low thermal influence of the analyzed fluid, a <br>method is presented for the characterization of the thermal material parameters, particularly …
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Distributed Sensors, Data Analysis, and Non-Intrusive Load Monitoring: Foundations for Reliability-Centered Maintenance on Ships
… (NILM) tools aboard a U.S. Coast Guard Fast-Response Cutter (FRC) patrol boat, novel analysis methods of the corrosion protection systems on the FRC, and practical ways of making smart data approachable. Once implemented, these methods will reduce the effort needed to safely operate a …
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