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 127 for “"modeling method"”.
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Damage Modeling Method For Turbine Compressor Blade Tuning
The thesis presents a method of evaluation for blade damage in Combustion Turbine Compressor 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 …
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Semi-Automated Switching Regulator Modeling Method and Tool
… research targeted at automating the behavioral modeling process for switching voltage regulators. These regulators are commonly used in many application areas including discrete use in larger systems, integrated in a System on a Chip (SoC), or as the primary use case for a design. When used in …
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A Novel Dual Modeling Method for Characterizing Human Nerve Fiber Activation
… conductive space did allow for the approximate modeling of human neural electrical characteristics.</p>
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Assessment of a global contrail modeling method and operational strategies for contrail mitigation
… processed by NASA Langley Research Center using methods for identifying contrails as described by Mannstein [28]. Given detailed knowledge of the aircraft types and radar-based trajectory data, simulated contrails did not match contrails observed in the satellite images. First, striated cirrus …
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A discrete forward-modeling method for characterizing occultation lightcurves of tenuous planetary atmospheres
… a discrete numerical approach for forward-modeling lightcurves from stellar occultations by planetary atmospheres. Our discrete approach provides a way to arbitrarily set atmospheric properties at any radius from the occulting body, giving it flexibility for applying models of vertical …
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An Efficient Reduced Order Modeling Method for Analyzing Composite Beams Under Aeroelastic Loading
… aeroelastic tailoring. Due to the complexity of modeling composites, designers often select safe, simple geometry and layup schedules for their wing/blade cross-sections. An example of this might be a box-beam made up of 4 laminates, all of which are quasi-isotropic. This results in neglecting …
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Quality modelling and metrics of Web-based information systems
… applied and adapted software quality engineering methods and principles to address the following issues, a quality modeling method for derivation of quality models of Web-based information systems; and the development, implementation and validation of quality metrics of key quality attributes of …
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Flexible manufacturing system software development using simulation
This paper presents a hierarchical modeling method that can be used to simulate a Flexible Manufacturing System (FMS) at all levels of detail. The method was developed specifically to aid the software development needed for the hierarchy of computers that are present in an FMS. The method was …
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Increasing the level of reuse of complete process models in a process modelling repository
Business Process Modeling has become a common activity in organisations. However, as the number of process models increases, so too does the number of duplicated models increase, and the level of process model reuse has been found to be surprisingly low. In organisations which operate in an …
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Terminal Behavioral Modeling of Electric Machines for Real-time Emulation and System-level Analysis
… expanded to the electrical machines. Using this modeling method, it is possible of have accurate behavior of electrical and mechanical terminals of the machine without the detailed information about the internal structure of the machine, material characteristics or topology of the machine. …
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Data-driven flight procedure simulation and noise analysis in a large-scale air transportation system
… framework development, an airport-level noise modeling method is developed to enable rapid exposure and impact analysis for system-level evaluation of advanced operational procedures. The modeling method and framework are demonstrated by evaluating potential benefits of specific advanced …
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Coupled electro-mechanical system modeling and experimental investigation of piezoelectric actuator-driven adaptive structures
… and application of adaptive structures is a modeling method to allow for performance prediction and parametric optimization of the integrated system. The statics-based modeling approaches have been applied to model piezoelectric (PZT) actuator-driven adaptive structures. The dynamic …
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Willans Line Modeling for Powertrain Analysis and Energy Consumption of Electric Vehicles
… In light of this trend, reliable and accurate modeling methods are necessary to aid the development of more energy efficient vehicles with greater drivable range. Many methods exist for evaluating energy consumption of current and future vehicle designs over the US certification drive cycles. …
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Convex Modeling Techniques for Aircraft Control
… has been an active area of research. New methods have been developed beyond the traditional gain-scheduling approach. One such design method leads to a linear parameter varying (LPV) controller that changes based on the real-time variation of system dynamics. Before such a controller can …
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Parametric uncertainty analysis for complex engineering systems
… the rapid advancement of computational science, modeling and simulation have become standard methods to study the behavior of complex systems. As scientists and engineers try to capture more detail, the models become more complex. Given that there are inevitable uncertainties entering at every …
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Modeling and simulation for signal and power integrity of electronic packages
… of this dissertation is to develop electrical modeling and co-simulation methodologies for signal and power integrity of package and board applications. The dissertation includes 1) the application of the finite element method to the optimization for decoupling capacitor selection and placement …
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Numerical Analysis of Reinforced Masonry Shear Walls Using the Nonlinear Truss Approach
… of available experimental equipment, analytical modeling is the only means to conduct systematic parametric studies for prototype RM wall systems and quantify the seismic safety offered by current design standards. A number of modeling approaches, with varying levels of complexity, have been used …
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Computer aided floating zone growth of Germanium-Silicon crystals in a resistance heated multi-zone furnace
… By using global simulations and <br>the inverse modeling method, its optimal design and its <br>performance could be obtained. By means of direct numerical simulations, the influence of solutal Marangoni convection on species transfer in a floating <br>zone could be qualitatively explained. The …
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Systems analysis of community noise impacts of advanced flight procedures for conventional and hybrid electric aircraft
… procedures and advanced aircraft technologies. A modeling method to assess their impacts must consider the contributions of aircraft engine and airframe noise sources as they vary with the position, thrust, velocity, and configuration of the aircraft during the flight procedure. The objective is …
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Effective modeling of advanced filters and multiplexing networks
… requirements and specifications. Conventional modeling techniques are typically either based on fast but inaccurate circuit models, or based on full-wave electromagnetic (EM) simulation, which is accurate yet time-consuming. To overcome the limitations of conventional methods, this thesis …
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