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 14 of 14 for “"Equivalent Models"”.
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Equivalent Modeling of Medium-Voltage Gate Drive Circuitry
… leverages a decomposition technique to derive equivalent models for the differential-mode (DM) and CM behavior for a medium voltage gate driver. A set of DM and CM templates for a generalized two-line system are leveraged with a design procedure to resolve the equivalent models. These models …
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Modeling and simulation of surface mount packages
… two different packaged structures are performed. Equivalent electrical circuit models for the structures are then derived and compared with measured results to determine quality of fit and validity of these models. With this modeling technique, various package parasitics affecting the circuit …
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Incorporation of linearized sensitivities in the Ward method of equivalencing
… occur in a basecase network using the Ward equivalent, the real-power response from the equivalent is generally very good, but the reactive-power response does not model very well in general. A two-step linearization technique is proposed which updates the Ward equivalent as a function of …
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Guidelines for Developing Low Frequency Model Equivalents in Emerging Electrical Grids
Dynamic model equivalents of power systems is an ongoing topic that continues to be relevant despite computing power advancements. Today's electrical grids are going through significant changes. The integration and installation of technologies that use power electronic devices pose a continuous …
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The heteromeric 5-HT3A/B receptor:the effect of 5-HT3B subunits on receptor structure and ligand recognition
… viewed from the extracellular face. Homology models for the heteromeric receptor were then constructed using both the electron microscopic structure of the nicotinic acetylcholine receptor, from Torpedo marmorata, and the X-ray crystallographic structure of the soluble acetylcholine binding …
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Characterization of Low Density Intracranial Lesions Using Dual-Energy Computed to mography
… released new computed tomography (CT) scanner models with dual-energy capabilities, which may be successfully applied to this issue. By acquiring data at two different energies, dual-energy CT (DECT) collects information about the energy-dependent attenuation changes in a material and may help …
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Nonlinear system identification and control using a neural network approach
… approach which aims at generating small-signal equivalent models and also nonlinear models for a general class of converters, including resonant converters, and subsystems in a distributed power system is presented.
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Transmission grid strength analysis and operation of inverter-based microgrids
… with inverters. Detailed electromagnetic models of grid-forming and grid-following inverters are discussed, and their equivalent models are developed to improve computation efficiency for steady-state analysis. The equivalent circuit model is developed based on the voltage and current …
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Improved Guidance, Navigation, and Control for Autonomous Underwater Vehicles: Theory and Experiment
… theoretical justification for using simplified models, derive system identification algorithms, and verify our results through extensive field trials. Although this research focuses on small AUVs with limited instrumentation, the results are useful for underwater vehicles of any size. For …
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Data-enhanced applications for power systems analysis
… the data-enhanced estimation of network models, event identification from oscillation monitoring data, and dealing with the challenges of real-world data and data quality. Several important contributions of this work are the following. Analysis and results show that sensitivity and model …
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Design & Implementation of a Universal Communications Processor for Substation Integration, Automation and Protection
… engineering with the use of OO data and service models [5]. However, it has only been abstractly modelled meaning that it focuses on describing what the OO models are indented to provide rather than how they are built. Consequently, the IEC 61850 standard can only be operational when mapped to a …
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Fretting Fatigue Characterization of Steel Bolted Connections
… the extent of the reduction being larger for models with the Class B surface finish. On the other hand, for models with the Class A surface, the crack propagation lives increased with an increase in the bolt preload, while it decreased for the Class B models. Furthermore, the higher COF …
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Design, simulation and manufacturing techniques for fully textile integrated microwave circuits and antennas
… con las traducciones entre los distintos modelos equivalentes de la misma estructura textil. El modelo más complejo está basado en los filamentos de los que se componen los hilos multifilamento empleados y es, por tanto, el modelo que mayores recursos computacionales requiere. El modelo intermedio …
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Design of metasurfaces for detection system application
… are presented. Metasurfaces' analytical models are introduced from two points of view: extracting their constitutive parameters and developing their equivalent circuit models. The latter is useful for relating the metasurfaces' behavior to their geometry and constituent materials. A new …