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 31 for “"domain modeling"”.
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Domain Modeling Theory and Practice
… existing sources. Various methodology for data modeling has been proposed by different research groups, under different approaches and based on the scenarios of the different domain of application. However, a few methodology elaborates the proceeding steps. As a result, there is lack of …
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Multiple region finite-difference time-domain modeling of duct cavities
… this thesis investigates the possibility of modeling large duct cavities in a piecewise manner using a finite-difference time-domain approach, modified to successively model individual subsections of the cavity. This change improves the computational efficiency of FD-TD while maintaining a …
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Time-domain Modeling of Light Matter Interactions in Active Plasmonic Metamaterials
… changing media on light propagation, numerous modeling methods have been developed. Among them, due to the nature of transient, nonlinear, and impulsive behavior, the time domain modeling approach is viewed as the most viable method. In this work, we develop a time-domain model (method of …
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Time domain modeling of unsteady aerodynamic forces on a flapping airfoil
The goal of this research is to develop a versatile and fast code to compute the unsteady lift and thrust forces generated by a flapping airfoil and apply it to engineering problems. We consider both plunging and pitching types of motion and develop a time marching simulation based on early work in …
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Finite-difference time-domain modeling of oblique indidence scattering from periodic surfaces
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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A Time-Domain Modeling of Multi-Element Resonant Converter With Capacitive Output Filter
… interface (GUI) features to this tool. The time-domain analysis of CLL resonant converter has been introduced in the literature. An alternative time-domain analysis of LLC resonant converter has been proposed.This generalized analysis is used to model LLC resonant, CLL resonant and LC series …
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Domain Modeling and Conceptualization of a Theoretical Model for Sensory Response to Music
… design approach and concept analysis, the target domain of sensory processing and reactivity was analyzed and modeled with operationally defined essential constructs. The generated result comprises the theory-based ‘Sensory Response, Music Stimuli, and Arousal Model,’ indicating how layers of …
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Domain Modeling for Knowledge-Based Systems: An Approach Based on Objects, Events, and Rules
… the representation scheme, we have developed a modeling tool that could provide several levels of useful assistance--from typical clerical type of support to semantic level support such as consistency-checking and assisting in detection of semantically missing components in the model. We have …
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Implementation and Demonstration of a Time Domain Modeling Tool for Floating Oscillating Water Columns
… the dynamics of a floating OWC in the time domain. This code, known as the Floating OWC Iterative Time Series Solver (FlOWCITSS), uses the pressure distribution model paired with state space realization to capture the internal water column dynamics of the WEC and estimate pneumatic power …
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Implementation and comparative analysis of supervised machine learning methods for domain modeling and grade estimation techniques
… profitable mining operations. Current resource modeling techniques are time-consuming, and prone to errors due to manual interpretation of detailed data leading to economic viability issues due to uncertainties associated with the estimates. Geostatistics, while a predominant method in resource …
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Design, fabrication, and characterization of a wideband microwave balun
… balun is measured and evaluated in both the time domain and frequency domain, indicating a 5 GHz bandwidth. The time domain modeling technique is used to characterize the balun's performance. Based on physical analysis of the balun's configuration, the discontinuities through the transmission …
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Scenario-Based Development and Verification of Domain-Specific Languages
<p>The use of domain-specific languages (DSLs) has increased manifold for problem solving in specific domain areas as they allow for a wider variety of expressions within their domain. Modeling using DSLs has shown high increases in productivity after accounting for the time and cost expended in …
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Damage Modeling Method For Turbine Compressor Blade Tuning
… Section. This method involves use of multiple domains within a single Finite Element Model to predict the effect of damage on the blade properties. This approach offers significant time and effort savings when compared to traditional evaluation methods of similar problems. It is demonstrated …
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Frequency Domain Methods for Predicting the Transport of Non-Uniform Flow Through Turbomachinery Compressors
… is presented. The method relies on frequency-domain transformations of total pressure distortion patterns, and the use of digital filter techniques to capture the effect of a blade row on the total pressure distortion. Compressor characteristics, described by a frequency response function, are …
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Thermochronology and geobarometry of the Granite Mountains, southeast California: Exhumation of a plutonic complex during collapse of the Sevier orogen
… 500°C at ∼75 Ma. K-feldspar multi-diffusion domain modeling indicates a cooling rate gradient from SW to NE of 63, 32, and 16°C/Ma for three samples spanning a transect across the range. NE K-feldspar cooled through ∼252°C by 73 Ma while other samples remained >375°C suggesting a …
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Accurate Small-Signal Modeling for Resonant Converters
… an impediment to performance optimization. Many modeling attempts have been made to date. Besides the discrete time-domain modeling, most continuous-time modeling approaches are based on fundamental approximation, and are thus unable to provide sufficient accuracy for practical use. An equivalent …
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Exploring the Limits of Boundary Element Methods for Wave Energy Converter Hydrodynamics
… methods (BEM) are used to calculate frequency-domain representations of hydrody-namic forces for moored and floating objects such as wave energy converters (WECs). The representations– excitation, added mass, and radiation damping in up to six degrees of freedom– define and scale the forces in …
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Discontinuous Galerkin Based Multi-Domain Multi-Solver Technique for Efficient Multiscale Electromagnetic Modeling
… (DG) methods provide an efficient option for modeling multiscale problems. With the help of the Riemann solver (upwind flux), a discontinuous Galerkin based multi-domain multi-solver technique is introduced in this work for multiscale electromagnetic modeling. Specifically, the proposed …
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Plausible Inference: A Knowledge-Intensive Approach to Induction (An Application of PI to the Problem of Hidden Homology Modeling)
… a user-controlled tool that assists in complex domain modeling. Using this perspective we develop Plausible Inference (PI)--a framework based on the tradeoffs suggested by this learning-as-a-tool perspective. Four aspects of the approach distinguish it from other learning approaches, and are …
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