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 99 for “"integration methods"”.
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Stability criteria for numerical integration methods.
Thesis: Elec. E., Massachusetts Institute of Technology, Department of Electrical Engineering, 1971
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Time integration methods for reactor kinetics.
Massachusetts Institute of Technology. Dept. of Nuclear Engineering. Thesis. 1972. Ph.D.
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Canonical integration methods for Hamiltonian dynamical systems
… 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 preserve the property of being …
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Approximate integration methods applied to wave propagation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Geology, 1958.
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Time Integration Methods for Large-scale Scientific Simulations
… equations that require the use of numerical time integration methods to solve. Many problems of scientific interest exhibit stiff behavior for which implicit methods are favorable, however standard implicit methods are computationally expensive. They require the solution of one or more large …
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Qualitative and quantitative convergence results for randomised integration methods
In this thesis different randomised integration methods based on either, randomised Quasi-Monte Carlo, or (adaptive) Markov chain Monte Carlo methods are studied. Depending on the underlying integration problem we show qualitative and quantitative results, which ensure the asymptotic correctness of …
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Monolithic and partitioned Rosenbrock-based time integration methods for dynamic substructure tests
… This has special demands on the utilized integration methods and their implementations. Researchers have devoted significant effort to implement second-order integrators, such as Newmark integration methods, in a monolithic way where both substructures are integrated altogether. However, …
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Advanced Time Integration Methods with Applications to Simulation, Inverse Problems, and Uncertainty Quantification
… to advance forward and adjoint numerical time integration methodologies for the simulation and optimization of semi-discretized multiphysics partial differential equations (PDEs), and to estimate and control numerical errors via a goal-oriented a posteriori error framework. We extend …
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Evaluation of Driver Performance While Making Unprotected Intersection Turns Utilizing Naturalistic Data Integration Methods
Within the set of all vehicle crashes that occur annually, of intersection-related crashes are over-represented. The research conducted here uses an empirical approach to study driver behavior at intersections, in a naturalistic paradigm. A data-mining algorithm was used to aggregate the data from …
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Estudo de algoritmos de integração direta para análise dinâmica estrutural
The aim of this work is to compare the direct integration methods (linear and higher order methods) used for the numerical solution of the Structural Dynamic Equations. The structural systems analyzed were assumed to be linear and were modelled by the Finite Element Technique. Besides an example of …
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Gait analysis for classification
… of human walking motion. A suite of time-integration methods, spanning a range of coarseness of time aggregation and modeling of feature distributions, are applied to these image features to create a suite of gait sequence representations. Despite their simplicity, the resulting feature …
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Musiikkia integroiden : erään helsinkiläisen alakoulun opettajien musiikin integrointitapoja
… other subjects and also to study the teaching methods, the quality of teaching and the time used for integration. When researching the integrative methods, the teachers' mutual co-operation and the curriculum as a guiding document of teaching work stand out, too. When analysing the music …
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Análise da estabilidade de métodos de integração passo a passo
… work the Galerkin's and Newmark's step-by-step integration methods are studied. Using the Equivalence Theorem, due to Lax and Richtmyer, convergence criteria are establishedd to this algorithms. Finally a comparison between these two methods, when applied to a single degree of freedom system, is …
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Nonsmooth Methods for Process Integration
Process integration is a promising method to improve sustainability and reduce waste in chemical processes by recovering excess resources such as heat, water, or other materials. However, calculating the maximum amount of resource that can be reused is challenging because resource sinks can only …
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Multi-Level process integration of heat pumps in a non-continuous processing site
… Response Amendment Act 2019, there is a need for methods and technologies that can be applied to replace industrial fossil fuel boiler use. With an increasing range of renewable energy sources, electrification provides a promising alternative to fossil fuel use; however, it is also critical to …
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Adaptive Geometric Numerical Integration of Mechanical Systems
… thesis is about structure preserving numerical integration of initial value problems, i.e., so called geometric numerical integrators. In particular, we are interested in how time-step adaptivity can be achieved in conjunction with structure preserving properties without destroying the good long …
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Development and Acceleration of Parallel Chemical Transport Models
… relies on future developments of mathematical methods and parallelization methods. Better mathematical methods allow simulations to more accurately model realistic processes and/or to run in a shorter amount of time. Parellization methods allow simulations to run in much shorter amounts of …
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An Algorithm for the Detection and Integration of Highly Oscillatory Ordinary Differential Equations Using a Generalized Unified Modified Divided Difference Representation
… of the Generalized Adams and Generalized BDF methods are presented. An efficient numerical algorithm for the evaluation of the local period of an oscillation is presented along with a corresponding algorithm which detects behavior that indicates the system may be amenable to solution by the …
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