Center for Research in Scientific Computation

Works Published in 2000

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Displaying works 21 - 37 of 37 in total

Sorted by most recent date added to the index first, which may not be the same as publication date order.

2000 journal article

A domain wall model for hysteresis in piezoelectric materials

JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES, 11(1), 62–79.

By: R. Smith*  & Z. Ounaies

Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 journal article

A coupled structural-magnetic strain and stress model for magnetostrictive transducers

Journal of Intelligent Material Systems and Structures, 11(2), 135–152.

By: M. Dapino *, R. Smith n , L. Faidley* & A. Flatau *

Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2000 journal article

Feedback control methodologies for nonlinear systems

JOURNAL OF OPTIMIZATION THEORY AND APPLICATIONS, 107(1), 1–33.

By: S. Beeler n, H. Tran n  & H. Banks n

author keywords: nonlinear optimal feedback control; Hamilton-Jacobi-Bellman equation; state-dependent Riccati equation; interpolation of open-loop controls
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 journal article

Transformation approaches for simulating flow in variably saturated porous media

WATER RESOURCES RESEARCH, 36(4), 923–934.

By: G. Williams *, C. Miller * & C. Kelley n 

TL;DR: It is shown that transformation methods can significantly improve solution efficiency and robustness compared to standard solution approaches and optimal transformation parameters depend upon auxiliary conditions, medium properties, and spatial and temporal discretization and are difficult to evaluate a priori. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
13. Climate Action (Web of Science)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2000 journal article

Stability of the human respiratory control system II. Analysis of a three-dimensional delay state-space model

JOURNAL OF MATHEMATICAL BIOLOGY, 41(1), 80–102.

By: J. Batzel* & H. Tran* 

author keywords: respiratory control models; time delay; delay dependent stability; instability; numerical simulations
MeSH headings : Adult; Brain / physiology; Carbon Dioxide / physiology; Computer Simulation; Feedback / physiology; Heart Failure / physiopathology; Humans; Models, Biological; Oxygen / physiology; Respiratory Physiological Phenomena
TL;DR: The purpose of this paper is to study the stability characteristics of a feedback control system of five differential equations with delays in both the state and control variables presented by Khoo et al. in 1991 for modeling human respiration. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 journal article

Stability of the human respiratory control system I. Analysis of a two-dimensional delay state-space model

JOURNAL OF MATHEMATICAL BIOLOGY, 41(1), 45–79.

By: J. Batzel* & H. Tran* 

author keywords: respiratory control models; time delay; delay-dependent stability; instability; numerical simulations
MeSH headings : Adult; Brain / physiology; Carbon Dioxide / physiology; Computer Simulation; Feedback / physiology; Heart Failure / physiopathology; Humans; Linear Models; Models, Biological; Oxygen / physiology; Respiratory Physiological Phenomena
TL;DR: Analysis of the stability characteristics of a feedback control system of five differential equations with delays in both the state and control variables presented by Khoo et al. in 1991 shows that the decreased cardiac output and increased delay resulting from the congestive heart condition can induce instability at certain control gain levels. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 journal article

Output regulation for linear distributed parameter systems

IEEE Transactions on Automatic Control, 45(12), 2236–2252.

By: C. Byrnes, I. Lauko, D. Gilliam & V. Shubov

Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

Reduced order model compensator control of species transport in a CVD reactor

OPTIMAL CONTROL APPLICATIONS & METHODS, 21(4), 143–160.

By: G. Kepler n, H. Tran n  & H. Banks n

author keywords: linear quadratic control; proper orthogonal decomposition; reduced order model; chemical vapour deposition; Dirichlet boundary control
UN Sustainable Development Goal Categories
15. Life on Land (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 review

Modeling instability in the control system for human respiration: applications to infant non-REM sleep

[Review of ]. APPLIED MATHEMATICS AND COMPUTATION, 110(1), 1–51.

By: J. Batzel n & H. Tran n 

TL;DR: The purpose of this paper is to extend the model presented by M. Jones in 1991 to include variable delay in the feedback control loop and to study the phenomena of periodic breathing and apnea as they occur during quiet sleep in infant sleep respiration at around 4 months of age. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 journal article

Energy-based hysteresis model for magnetostrictive transducers

IEEE TRANSACTIONS ON MAGNETICS, 36(2), 429–439.

By: F. Calkins*, R. Smith n  & A. Flatau *

author keywords: hysteresis model; magnetorestrictive transducer
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 journal article

Superlinear convergence and implicit filtering

SIAM JOURNAL ON OPTIMIZATION, 10(4), 1149–1162.

By: T. Choi* & C. Kelley* 

author keywords: noisy optimization; implicit filtering; BFGS algorithm; superlinear convergence
TL;DR: This paper shows how the implicit filtering algorithm can be coupled with the BFGS quasi-Newton update to obtain a superlinearly convergent iteration if the noise in the objective function decays sufficiently rapidly as the optimal point is approached. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2000 journal article

Reduced-order model feedback control design: Numerical implementation in a thin shell model

IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 45(7), 1312–1324.

By: H. Banks n, R. Rosario  n & R. Smith n 

author keywords: LQR feedback control; proper orthogonal decomposition; reduced-basis computational methods; thin shell dynamics
TL;DR: Reduced-order models employing the Lagrange and popular proper orthogonal decomposition (POD) reduced-basis methods in numerical approximation and feedback control of systems are presented and numerically tested. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 journal article

Nondestructive evaluation using a reduced-order computational methodology

INVERSE PROBLEMS, 16(4), 929–945.

By: H. Banks n, M. Joyner n, B. Wincheski* & W. Winfree*

TL;DR: This paper uses eddy current based techniques and reduced-order modelling to explore the feasibility of detecting subsurface damage in structures such as air foils and pipelines and finds the methods to be efficient and robust even with data containing 10% relative noise. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Structural magnetic strain model for magnetostrictive transducers

IEEE TRANSACTIONS ON MAGNETICS, 36(3), 545–556.

By: M. Dapino *, R. Smith n  & A. Flatau *

author keywords: hysteresis; magnetomechanical model; magnetostrictive transducer
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 journal article

Time and frequency domain scattering for the one-dimensional wave equation

INVERSE PROBLEMS, 16(5), 1377–1403.

By: B. Browning n

UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2000 journal article

Optimized design of switching amplifiers for piezoelectric actuators

JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES, 11(11), 887–901.

By: S. Chandrasekaran, D. Lindner* & R. Smith* 

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 article

Mesh independence of matrix-free methods for path following

Ferng, W. R., & Kelley, C. T. (2000, May 21). SIAM JOURNAL ON SCIENTIFIC COMPUTING, Vol. 21, pp. 1835–1850.

By: W. Ferng & C. Kelley* 

author keywords: path following; bifurcation; collective compactness; fold point; mesh independence; matrix-free method; GMRES; Arnoldi method; singularity
TL;DR: If these problems are discretized so that certain collective compactness and strong convergence properties hold, then this algorithm can follow smooth folds and capture simple bifurcations in a mesh-independent way. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

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