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 123 for “"Closed-form solutions"”.
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Closed/Semi-Closed Form Solutions for Face/Core Debonds in Sandwich Beams
… used to incorporate the effects of crack tip deformation in beam theory. In this model, EFA is extended further to better capture the effects of transverse shear. Unlike most models, this approach can be applied for both isotropic and orthotropic face & core materials. The approach uses both …
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Characterizations of and closed-form solutions for plain vanilla and exotic derivatives
… framework. Our main contribution is to derive closed-form solutions for European plain vanilla options. A further extension to displaced gamma tails is possible while retaining full analytical tractability. We propose an efficient routine to estimate the physical model parameters through …
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Closed-form Solutions to Robust and Optimal Control Problems of Second-Order Systems
… To overcome these challenges, we develop closed-form solutions and expressions for various control problems that offer high accuracy, scalability, and insight. We begin by proposing novel closed-form stabilizing and destabilizing solutions to the CARE for second-order systems, explicitly …
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Constant-frequency resonant power processors
… and is very easy to implement. Unified closed-form expressions for the steady-state operating conditions are derived. Circuit performances are analyzed through closed-form solutions. Similar analyses are performed for a phase-controlled dual-inverter resonant converter. The feasibility …
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Parameter optimization of atmospheric skip trajectories for use in minimum fuel usage transfer orbits
… associated with an atmospheric skip trajectory. Closed form solutions are obtained through several changes of independent variable, the use of modified Chapman variables and the consequent analytical integration of the uncoupled equations. The closed form solutions contain between two and six …
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"Shear Lag" em estruturas tubulares de paredes delgadas
Closed form solutions for deflections and stresses in thin-walled tubular beams are presented. The analytical equations are developed within an energy approach where shear strains and shear lag effects are considered. Explicit expressions for transverse deflections and stesses are given for …
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Topics in the Design and Analysis of Combinatorial Algorithms
… a technique for obtaining more precise closed form solutions of recurrence relations defined by minimization and maximization operators. Since such recurrences arise quite frequently in the analysis of the complexity and performance of algorithms it is important to develop techniques for …
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On the Capacity of Scalar Gaussian Channels Subject to State Obfuscation
… to a state-obfuscation constraint imposed in the form of near independence between the channel outputs and the channel coefficients has been studied. By defining the operational capacity as the maximal achievable rate under the state obfuscation constraint, an informational counterpart is been …
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Application of Caquot's solution to the analysis of stability of shallow circular cavities in Tresca material
… In this thesis, Caquot's analytical model is re-formulated to express the stability condition of a shallow cavity (a section of long cylindrical tunnel or a spherical opening) in terms of a factor of safety using the strength reduction technique, as commonly done in the evaluation of stability of …
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Maneuver analysis for spinning thrusting spacecraft and spinning tethered spacecraft
… The first topic discussed in this thesis derives closed-form solutions for the angular velocity, Euler angles, inertial velocity, and inertial displacement solutions with nonzero initial conditions. Using the closed-form solutions, the effect of variations in the spin-axis moment of inertia and …
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Probabilistic Modelling in Function Space
… defining distributions over functions, enabling closed form solutions and principled handling of uncertainty. However, their application is often hindered by the difficulty of formulating suitable priors through analytical covariance functions and ensuring computational scalability. In contrast, …
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Three essays in finance and macroeconomics
… lines of Scheinkman and Xiong (2003) and obtain closed form solutions for all quantities involved. I show that market based q and investment are increased, even though such investment is not warranted on the basis of long run value maximization. I use a simple episode to test the hypothesis that …
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Triple Trigonometric Series and Their Application to Mixed Boundary Value Problems
… in which the integral equation can be solved in closed form are discussed in detail.</p> <p>In later chapters, the application of triple trigonometric series to problems in physics and engineering is demonstrated and closed form solutions for the physical parameters of interest are obtained.</p>
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Análise de placas circulares com ortotropia física ou geométrica
In the former, the plate has uniform thickness and its material has different elastic properties in the radial and circunferential directions; in the latter, the isotropic plate is stiffenned with uniformily spaced radial and circunferential ribs. For each case, the equilibrium differential …
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The Tollmien-Schlichting instability of laminar viscous flows
… suction strips, we use linear triple-deck, closed-form solutions for the mean flow to do a linear, parallel, spatial stability analysis. We develop a simple linear optimization scheme to determine the number, spacing, and mass-flow rate through the strips and conclude, surprisingly, that …
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Application of Finite-State Wake Models to Rotors Re-entering Their Own Wake
… velocity for this case, along with comparison to closed-form, potential flow solutions for validation. The finite-state model is shown to converge with the closed-form solutions up to 10 states prior to increasing divergence with an increasing number of states.
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A computational bow-spring model
… behavior (characterized by deflected shape and deformation force) is difficult to model, because internal forces and moments and the geometry are both unknown. The only closed-form solutions to such systems are relatively useless to a mechanical engineer. This work comprises an iterative model …
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Default-free bond futures and options on default-free bond futures: Theoretical and empirical investigation
… of these two factors follow a linear transformation of an Ornstein-Uhlenbeck process. The prices of these contingent claims are solutions to a set of partial different equations subject to proper boundary conditions. As there is no closed form solutions to these equations, a …
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Monotone bounds on the productivity of fixed-cycle production lines
… of items produced per unit time in the long run. Closed form solutions are derived for the productivity of a two-machine line with dependent machines. These solutions are used to obtain bounds on the productivity of longer lines. The transition matrix associated with an N-machine line is shown to …
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Parameter estimation for a two-state semi-Markov model of a univariate point process.
… function. A system of equations was then formed to find the maximum likelihood estimates of the parameters. Since closed-form solutions for the estimates could not be found, an iterative method to stabilize initial guesses of the parameter values was attempted with only limited success. …
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