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.
Results
Showing 1 to 20 of 66 for “"Steady-State model"”.
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Anaerobic Digestion Steady State model parameter estimation for determination of waste activated sludge characteristics
… feasible, a better understanding of the current models predicting the fate of P and other material components in place are required. The objective of this study is to utilise augmented batch tests to determine the characteristics of the Waste Activated Sludge (WAS) containing Polyphosphate …
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Limiting, steady state model for diffusion of natural gas through the reservoir cap rock, and its implication for southeastern Colorado
Includes bibliographical references.
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Prediction of Laser Ablation In Brain: Sensitivity, Calibration, and Validation
… stands to benefit from predictive computational modeling. The dearth of physical model parameter data leads to modeling uncertainty. This work implements a well-accepted framework with three key steps for model-building: model-parameter sensitivity analysis, model calibration, and model …
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Modeling, optimization and hardware-in-loop simulation of hybrid electric vehicles
This thesis investigates modeling and simulation of hybrid electric vehicles with particular emphasis on transient modeling and real-time simulation. Three different computer models, i.e. a steady state model, a fully-detailed transient model and a reduced-intensity transient model, are developed …
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Modeling stress accelerated grain boundary oxidation (SAGBO) in INCOLOY alloy 908
… alloys (University of Pennsylvania, 1999) to model stress accelerated grain boundary oxidation (SAGBO) in INCOLOY alloy 908. The steady state model involves the embrittlement along the grain boundary due to oxygen diffusion with the concentration gradient and the stress field ahead of the …
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Analysis and design of a 500 kHz series resonant inverter for induction heating applications
The steady state model and analysis of a phase-shift controlled series resonant inverter (PSC-SRl) is presented. This steady state model includes the evaluation of the zero-voltage switching (ZVS) condition and the determination of the ZVS operating region. Based upon this analysis a frequency …
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"We Shall Have to Make the Best of It:" The Conversion of Dennis Sciama
… (1926-1999) was a long-standing advocate of the steady state model of the universe. This theory, originally proposed in 1948 by Hermann Bondi, Thomas Gold, and Fred Hoyle, suggested that the universe was eternal, and unchanging on the largest scales. Contrary to the popular image of a scientist …
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A Numerical Model for Flux Decline During the Crossflow Ultrafiltration of Colloidal Suspensions
… in crossflow filtration quickly reaches a steady-state for constant boundary conditions. Hence, the unsteady nature of the permeate flux decline must be caused by changes in the hydraulic boundary condition at the membrane surface due to cake formation during filtration. A step-wise pseudo …
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A steady state stoichiometric model describing the anaerobic digestion of biological excess phosphorus removal waste activate sludge
… Objectives and Scope Until the mid-1990's model-based studies on wastewater treatment plants (WWTPs) focussed on the development of models describing a single unit operation within the WWTP i.e. an activated sludge system, an anaerobic digester or some other WWTP unit operation. The focus …
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The gravity wave-critical level interaction
Three models are developed to examine various features of the gravity wave-critical level interaction and some of its possible roles in the dynamics of the atmosphere and the oceans. A linear inviscid steady state model is designed which, though singular at the critical level, illustrates certain …
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Fine Coal Dewatering Using Hyperbaric Centrifugation
… dewatering systems. In the current study, steady-state and dynamic dewatering models were developed in order to be able to simulate the behavior of the HFC technology. The steady-state model, which was based on grain-size properties, used empirical expressions to predict product moistures. …
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Models for Calculating Voltage Dip Caused by Induction Motor Starting.
… instant in time. The Transient Stability model was used as a standard of reference for comparing the accuracy of the Steady-State model, thus allowing meaningful decisions relative to practical engineering applications to be made. The results presented tend to verify that the two models …
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Development of a Dynamic Modelling Technique for Sizing Wood Chip Boilers
… purpose of this study was to develop three models that allow more accurate dimensioning of wood chip boilers.<br/><br/>- The first model developed was a steady state one. It relied on average temperature data and the supposition that the need for heat in buildings is almost linearly …
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Fractal structure of aggregates induced by shear motion.
… analysis of nonfractal particle coagulation at steady state, a steady-state size distribution model for fractal aggregates was developed for size intervals dominated by Brownian motion, shear, or differential sedimentation. A non-steady-state size distribution (two-slope) method was proposed for …
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Modeling the Non-equilibrium Phenomenon of Diffusion in Closed and Open Systems at an Atomistic Level Using Steepest-Entropy-Ascent Quantum Thermodynamics
… quantum thermodynamics (SEAQT), can be used to model and describe the non-equilibrium phenomenon of diffusion based on the principle of steepest-entropy ascent. The research presented in this dissertation demonstrates the capability of this framework to model and describe diffusion at atomistic …
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Time-domain based steady-state initialization for the EMTP
The existing steady-state initialization algorithm in the electromagnetic transients program EMTP is based on a frequency-domain admittance method. This yields a simple, efficient solution for linear, lumped element networks. However, the basic algorithm cannot be easily extended to handle …
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Experimental and Modeling Studies of the Stability of Pitting Corrosion on Pure Aluminum in Basic Chloride Solutions
The quasi steady state model was expanded to include homogeneous bulk reactions for hydrolysis and complexation reactions. The model predicted pH values of 2.5 to 3.0, values that agreed well with experimental measurements, only when the first two hydrolysis reactions of aluminum were included in …
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Nonlinear transient and steady state analysis for self-excited single-phase synchronous reluctance generator
… and ruggedness, but can also have enhanced steady-state characteristics and high efficiency over a wide range of operation. Moreover, its output frequency is determined only by the prime mover speed, rather than by both the load and the prime mover speed as in an induction generator, so SERG …
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Fabrication and Characterization of Superconducting Core Fibers with Fused Silica Cladding
… of a one dimensional (1-D) single-phase steady state model to predict the heat transfer during cryogenic liquid transfer inside glass tube. In this thesis, both Pb and YBCO superconductor core fibers with fused silica cladding have been demonstrated. The fibers were fabricated via the …
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Analysis of harmonic distortion in an Integrated Power System for naval applications
… conditions experienced by a Naval warship. A steady state model of an Integrated Power System (IPS) was developed in a commercially available power system simulation tool. The system chosen for this study was a three-phase, 4160 VAC, 80 MW power system with a 450 VAC bus to supply traditional …
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