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 499 for “"numerical experiments"”.
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Numerical experiments on continental lithosphere extension
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1982.
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Numerical experiments on the sensitivity of an atmospheric hydrologic cycle to the equilibrium temperature.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Meteorology.
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Different styles of deformation of the fore-arc wedge along the Chilean convergent margin : insights from 3D numerical experiments
… related to active subduction. The applied numerical method is the finite element technique by means of the commercial software package ABAQUS. The thermal models are focused on the thermal conditions along the plate interface. The thermal structure along the plate interface reveals the …
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Modeling And Optimization Of Non-Profit Hospital Call Centers With Service Blending
… by inbound calls. Theoretical analysis and numerical experiments illustrate that through dynamically assigning the inbound and outbound calls to operators under optimal threshold policy, mixing staffing policy is efficient to balance the system utilization and service quality. Numerical …
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Kalman Filtering and the Estimation of Multi-factor Affine Term Structure Models
… This paper examines these implications through numerical experiments on the three-factor Vasicek and Arbitrage-free Nelson-Siegel (AFNS) models. The numerical experiments involve Kalman filtering as well as likelihood optimisation for parameter estimation. It was found that the parameter sets …
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Canonical integration methods for Hamiltonian dynamical systems
… and symplectic structure) that call for special numerical integrators, namely canonical methods. Recent research in this aspect have shown that canonical numerical integrators may be needed for Hamiltonian systems. In this thesis, we explore possibilities for the construction of integrators that …
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Regularisation methods for imaging from electrical measurements
… information is discussed, and the results of numerical experiments are analysed. The method gives good results when the actual conductivity distribution is in accordance with the prior information. When the conductivity distribution violates the prior information the method is still capable of …
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Model Reduction of the Coupled Burgers Equation in Conservation Form
This thesis is a numerical study of the coupled Burgers equation. The coupled Burgers equation is motivated by the Boussinesq equations that are often used to model the thermal-fluid dynamics of air in buildings. We apply Finite Element Methods to the coupled Burgers equation and conduct several …
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Low-degree convection with melting and application to the Martian northern hemisphere
… in a finite element convection model and run numerical experiments to quantify the melt fraction, timing of melting, and timing of the onset of degree-one convection. All models include a stratified viscosity to induce degree-one flow. To assure that the model's result is robust I vary the …
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On evaluating small-scale variations of hydrologic processes in time and space
… in hydrologic properties at various scales. Numerical experiments are used to explore the effects of the distributions of various hydrologic processes at various scales. The model used in this study is a physically based distributed hydrologic model system (HMS). The HMS is implemented in a …
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Domain Decomposition Methods for Convection-Diffusion-Reaction Equations with Finite Volume Discretizations
… scalability of the two level preconditioners by numerical experiments. The finite volume element methods (FVEMs) is a special class of finite volume meth- ods. It shares properties of both finite element and finite volume methods. We develop an adaptive balancing domain decomposition by …
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Krylov Subspace Methods with Fixed Memory Requirements: Nearly Hermitian Linear Systems and Subspace Recycling
… to treat nearly-Hermitian problems. We present numerical experiments demonstrating that the performance of this algorithm is competitive. The other two projects involve extending a strategy called Krylov subspace recycling, introduced by Parks and colleagues in 2005. This method requires more …
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Approximation Methods for the Consistent Initialization of Differential-Algebraic Equations
… is introduced for these equations, and the numerical solution of the resulting system is analyzed for certain important classes of DAEs. Finally, some numerical experiments are described.
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Monte Carlo methods for the estimation of value-at-risk and related risk measures
… computational tasks in parallel. Through numerical experiments we show that our algorithms can improve efficiency in the sense of reducing mean-squared error.
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A motion of freely oscillating droplet of a yield stress fluid: analysis and numerical studies
… The problem is treated both analytically and numerically. In particular, we address the question if there exists a finite stopping time for an unforced motion of a yield stress fluid with free surface. In this thesis, a variational inequality formulation is deduced for the problem of yield …
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Control of Burgers' Equation With Mixed Boundary Conditions
… with mixed boundary conditions. We first conduct numerical experiments to test the convergence and stability of two standard finite element schemes for various Robin boundary conditions and a variety of Reynolds numbers. These schemes are used to compute LQR feedback controllers for Burgers' …
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Convex and Robust Optimization Methods for Modality Selection in External Beam Radiotherapy
… tractable quartic equation. Extensive numerical experiments are performed to gain insights into the effect of biological and physical properties on the choice of an optimal modality or combination of modalities. Chapter 2: Robust modality selection The feasible region and optimal …
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