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Thursday, October 22, 2020 | History

4 edition of Stability and error estimation for component adaptive grid methods found in the catalog.

Stability and error estimation for component adaptive grid methods

Stability and error estimation for component adaptive grid methods

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  • 24 Currently reading

Published by Research Institute for Advanced Computer Science, NASA Ames Research Center, National Technical Information Service, distributor in [Moffett Field, Calif.], [Springfield, Va .
Written in English


Edition Notes

StatementJoseph Oliger and Xiaolei Zhu.
Series[NASA contractor report] -- NASA CR-196492., RIACS technical report -- 94.14., NASA contractor report -- NASA CR-196492., RIACS technical report -- TR 94-14.
ContributionsZhu, Xiaolei., Research Institute for Advanced Computer Science (U.S.)
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17790245M
OCLC/WorldCa32227109

Solution adaptive Cartesian grid methods for aerodynamic flows with complex geometries Michael J. Aftosmis Wright-Laboratory / NASA Ames Mail Stop TB-2 NASA Ames Research Center Moffett Field, CA Cartesian methods for CFD offer an accurate and robust approach for simulating aerodynamic flows around geometrically complex bodies. Algorithmic Stability for Adaptive Data Analysis Raef Bassilyy Kobbi Nissimz Adam Smithx Thomas Steinke{Uri Stemmerk Jonathan Ullman Abstract Adaptivity is an important feature of data analysis—the choice of questions to ask about a dataset often depends on previous interactions with the same dataset. However, statisticalFile Size: KB.

Distributed Octree Data Structures and Local Refinement Method for the Parallel Solution of Three-Dimensional Conservation Laws. Grid Generation and Adaptive Algorithms, Cited by: This thesis presents a method based on the idea of multiple, component grids for the solution of hyperbolic partial differential equations (pde) using explicit finite difference techniques. Based upon Richardson-type estimates of the local truncation error, refined grids are created or existing ones removed to attain a given accuracy for a.

  This work is devoted to numerical studies on an algebraic multigrid preconditioned GMRES method for solving the linear algebraic equations arising from a space–time finite element discretization of the heat equation using h–adaptivity on tetrahedral meshes. The finite element discretization is based on a Galerkin–Petrov variational Cited by: 2. The accurate estimation of these parameters is very important for assessing the stability and tuning the adaptive protection system on power swing relays. The effectiveness of the method is demonstrated in a simulated data from machine bus system by:


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Stability and error estimation for component adaptive grid methods Download PDF EPUB FB2

Applying recent stability results for a class of numerical methods on uniform grids, the convergence of these methods for linear problems on component adaptive grids is established here.

Furthermore, the computational error can be estimated on CAGs using these stability results. Using these estimates, the error can be controlled on by: 9. Component adaptive grid (CAG) methods for solving hyperbolic partial differential equations (PDEs) are discussed in this paper.

Applying recent stability results for a class of numerical methods on uniform grids, the convergence of these methods for linear problems on component adaptive grids is established by: 9. Component adaptive grid (CAG) methods for solving hyperbolic partial differen-tial equations (PDE's) are discussed in this paper.

Applying recent stability results for a class of numerical methods on uniform grids, the convergence of these methods for linear problems on component adaptive grids is established here.

Furthermore. Component adaptive grid (CAG) methods for solving hyperbolic partial differential equations (PDE's) are discussed in this paper. Applying recent stability results for a class of numerical methods on uniform grids, the convergence of these methods for linear problems on component adaptive grids is established here.

COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

Component adaptive grid (CAG) methods for solving hyperbolic partial differential equations (PDE's) are discussed in this paper. Applying recent stability results for a class of numerical methods on uniform grids.

The convergence of these methods for linear problems on component adaptive grids is established here. As a first step, virtually all modeling procedures in use in computational mechanics involve a process of discretization in which continuum models of nature are transformed into discrete or digital forms manageable by digital computers.

This discretization process is critical to the overall computer. SIAM Journal on Numerical AnalysisAbstract | PDF ( KB) () Adaptive Finite Element Methods for Parabolic Problems V: Long-Time by: The implementation of adaptive mesh refinement (AMR) in the spectral-element method code Nek is used for the first time on the well-resolved large-eddy simulation (LES) of the turbulent flow.

The focus of this paper is to compare estimation techniques for harmonic detection in SG and smart micro-grid (SmG) systems. Harmonic estimation is fundamental to determine the correct operating conditions of power grids. The available methods are able to properly estimate harmonics under stationary : Angel Esteban Labrador Rivas, Newton da Silva, Taufik Abrão.

The research in this direction is still open, with new emerging solutions such as the non-linear adaptive method proposed in [21] for the estimation of the symmetrical components in real-time.

Read the latest articles of Applied Numerical Mathematics atElsevier’s leading platform of peer-reviewed scholarly literature.

Demkowicz, L., Oden, J.T., Rachowicz, W., Hardy, O.: Toward a universal h-p adaptive finite element strategy, part 1. Constrained approximation and data structure.

For the most part, adaptive grid methods fall into two main categories: local grid refinement and grid redistribution [76]. Important early work on local grid refinement was done by Berger and. While state estimation and stability are well understood when implemented via centralized processing, the scale and reliability requirements of the power grid require that they be implemented using distributed processing.

Thus, distributed state estimation is explained as a more scalable and fault‐tolerant approach. A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.

• A method to manage the amplitude change for system component in real-time is proposed. Abstract This paper proposes a smart approach of estimating the symmetrical component into a network. The Smart grid development and deployment offers serval advantages regarding the overall system performance of the electrical system.

Frequency Adaptive Parameter Estimation of Unbalanced and Distorted Power Received Decemaccepted Decemdate of publication January 6,date of current. Isogeometric Analysis is a generalization of classical Finite Element Analysis (FEA) which ISOGEOMETRIC ANALYSIS: APPROXIMATION, STABILITY AND ERROR ESTIMATES FOR h-REFINED MESHES | Mathematical Models and Methods in Applied SciencesCited by: 1 Dynamic Modeling, Stability, and Control of Power Systems with Distributed Energy Resources Tomonori Sadamoto1, Aranya Chakrabortty2, Takayuki Ishizaki1, Jun-ichi Imura1 Abstract This article presents a suite of new control designs for next-generation electric smart Size: 6MB.

In this paper, an adaptive neural estimation approach for harmonics and DC offset component of multi-frequency oscillating electric signals is introduced.

The application of B-spline artificial neural networks to compute efficiently an adaptive unique gain for online estimation of unknown signal components is proposed.Robust and Adaptive Control Workshop Adaptive Control: Introduction, Overview, and Applications Course Overview • Motivating Example • Review of Lyapunov Stability Theory – Nonlinear systems and equilibrium points –Linearization – Lyapunov’s direct method – Barbalat’s Lemma, Lyapunov-like Lemma, Bounded StabilityFile Size: 2MB.

Abstract: This paper presents a new multiresonant frequency-adaptive synchronization method for grid-connected power converters that allows estimating not only the positive- and negative-sequence components of the power signal at the fundamental frequency but also other sequence components at other harmonic frequencies.

The proposed system is called MSOGI-FLL since it is Cited by: