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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 181 for “"Semi-analytical"”.
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Permeability Distribution Estimation Based on Semi-Analytical Reservoir Simulator
… as the sum of prior model mismatch part. For our semi-analytical simulator, the choice of optimization algorithms to minimize the objective function becomes of vital importance. For our simulator, we considered both gradient based methods and non-gradient based methods. Gradient based algorithms …
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Semi-analytical model of ionization oscillations in Hall thrusters
This thesis presents efforts to better understand the breathing-mode oscillation within Hall thrusters. These oscillations have been present and accepted within Hall thrusters for decades, but recent interest in the oscillation has occurred partly due to a possible connection between wall erosion …
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Semi-Analytical Finite-Element Analysis for Elastic Solids of Revolution
Made available in DSpace on 2014-12-14T14:42:10Z (GMT). No. of bitstreams: 1 7624044.pdf: 3939485 bytes, checksum: f68a86b89be290aa76f6034d8f776fb4 (MD5) Previous issue date: 1976
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A Semi-analytical Model for Nonlinear Elliptical Inclusions with Spherical Eigenstrains
… in 1957, John D. Eshelby provided a fully-analytical solution for the stress and deformation fields induced by an incompatible ellipsoidal inclusion embedded within an infinite matrix. Over the past six decades, his theory, which considers linearly elastic materials, has been essential in …
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Accuracy analysis of the semi-analytical method for shape sensitivity analysis
The semi-analytical method, widely used for calculating derivatives of static response with respect to design variables for structures modeled by finite elements, is studied in this research. The research shows that the method can have serious accuracy problems for shape design variables in …
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A Semi-Analytical Line Transfer (SALT) Model For Bi-conical Galactic Outflows
We generalize the semi-analytical line transfer (SALT) model recently introduced by Scarlata and Panagia (2015) for modeling galactic outflows, to account for bi-conical geometries of various opening angles and orientations with respect to the line-of- sight to the observer, as well as generalized …
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Analytical and Semi-Analytical Models for Composite Reservoirs with Complex Well Completions
… work is to develop rigorous (and yet) practical analytical and semi-analytical models for multi-well performance in petroleum reservoirs, with a view to simulating and forecasting production from unconventional resources. The models will address flow in different reservoir systems (homogeneous …
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Analytical and semi-analytical maneuvering strategies for close proximity operations in space
L'abstract è presente nell'allegato / the abstract is in the attachment
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A Semi-Analytical Method for the Thermal-Hydraulics of a Boiling Water Reactor
Made available in DSpace on 2017-07-06T18:59:14Z (GMT). No. of bitstreams: 3 Vandermyde_Mark_A_MS.pdf: 46312150 bytes, checksum: 094a60daa2636d18573e970c85add0ce (MD5) Vandermyde_Mark_A_MS_ABS.pdf: 451063 bytes, checksum: dac8cd25f58984ef8720768fc460b356 (MD5) license.txt: 4813 bytes, checksum: …
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STUDY OF THE LOADING OF PILES USING A SEMI-ANALYTICAL METHOD AND THE DIGITAL IMAGE CORRELATION TECHNIQUE
The response of single piles and pile groups to axial and lateral loading and the displacements induced in the soil by it are studied in this work using theoretical and experimental approaches. The theoretical solution for the loading of piles is based on idealized displacement forms, energy …
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Semi-Analytical Model to Study Vibrations of High-Speed, Rotating Axisymmetric Bodies Coupled to Other Rotating/ Stationary Structures
… and stationary bodies motivates this work. A semi-analytical model is developed for high-speed, compliant, rotating bodies. Exploiting the axisymmetry of the rotating body, the developed semi-analytical model only discretizes the two-dimensional radial cross-section; Fourier series are used in …
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Evaluation of a semi-analytical approach to the retrieval of water quality parameters from optical data in European coastal Case-II waters
… coastal waters. We study the suitability of a semi-analytical algorithm for the retrieval of these parameters in coastal waters to investigate the validity of radiative transfer theory and bio-optical models that have been developed primarily for open ocean waters. To obtain water quality …
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Trolle-Schwartz HJM interest rate model
… terms presented in an analogous fashion to the seminal Heston (1993) model. The Trolle and Schwartz (2009) model provides semi-analytical pricing formulas for zerocoupon bonds and zero-coupon bond options. These formulas are extended to price interest rate caplets, and therefore caps, as well as …
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Ultimate Strength of Clamped Steel-Elastomer Sandwich Panels under Combined In-plane Compression and Lateral Pressure
An efficient interaction formula and a semi-analytical method are developed for calculating the ultimate strength of steel-elastomer sandwich panels under combined in-plane compression and lateral pressure. By using the Galerkin method and extending the semi-analytical method to clamped sandwich …
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The Dynamic Flexibility Method in Structural Dynamics: Application to Nonuniform Beams and Plates and to Cavity-Backed Plates
Efficient and accurate analytical or semi-analytical solutions have been developed for the dynamics of one and two dimensional linear structures employing elemental dynamic flexibility formulation. This dissertation is divided into three parts. In the first, the elemental flexibility formulation is …
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Design of the tip-tilt mirror for the adaptive optics system of amateur telescopes, and optimum placement of actuators
… the optimum placement of the actuators, a new semi-analytical approach has been used. Here the mirror has been modelled as a thin circular plate with a peripheral ring mass ( equal to the mass of the frame) and an elastic edge support. Modal analysis is performed to determine the natural …
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On intrinsic ultracontractivity of perturbed Levy processes and applications of Levy processes in actuarial mathematics
… processes, which enable us to develop efficient semi-analytical algorithms to solve the pricing and risk management problem of certain exotic variable annuity products. In particular, we consider two variable annuity products with guaranteed benefits, the Guaranteed Minimum Accumulation Benefit …
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Processo semi-analítico para análise de estruturas pelo método dos elementos finitos
… to three dimensional problems through the semi-analytical finite element process, making use of orthogonal functions. Prismatic structures and axi-symmetric structures with non-symmetrical loads, are studied using two finite elements. The first is a isoparametric quadrilateral quadratic …
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