Nancy K. Nichols

15 papers Journal 13Unranked 1
YearRankTypeTitle / Venue / Authors
2024 J jnl
Conditioning of hybrid variational data assimilation.
Numer. Linear Algebra Appl.
Shaerdan Shataer, Amos S. Lawless, Nancy K. Nichols
2023 J jnl
The Conditioning of Hybrid Variational Data Assimilation.
CoRR
Shaerdan Shataer, Amos S. Lawless, Nancy K. Nichols
2022 J jnl
New bounds on the condition number of the Hessian of the preconditioned variational data assimilation problem.
Numer. Linear Algebra Appl.
Jemima M. Tabeart, Sarah L. Dance, Amos S. Lawless, Nancy K. Nichols, Joanne A. Waller
2020 J jnl
The conditioning of least squares problems in preconditioned variational data assimilation.
CoRR
Jemima M. Tabeart, Sarah L. Dance, Amos S. Lawless, Nancy K. Nichols, Joanne A. Waller
2018 J jnl
Observation impact, domain length and parameter estimation in data assimilation for flood forecasting.
Environ. Model. Softw.
Elizabeth S. Cooper, Sarah L. Dance, Javier García-Pintado, Nancy K. Nichols, Polly J. Smith
2018 J jnl
The conditioning of least-squares problems in variational data assimilation.
Numer. Linear Algebra Appl.
Jemima M. Tabeart, Sarah L. Dance, Stephen A. Haben, Amos S. Lawless, Nancy K. Nichols, Joanne A. Waller
2016 J jnl
Diagnosing Horizontal and Inter-Channel Observation Error Correlations for SEVIRI Observations Using Observation-Minus-Background and Observation-Minus-Analysis Statistics.
Remote. Sens.
Joanne A. Waller, Susan P. Ballard, Sarah L. Dance, Graeme Kelly, Nancy K. Nichols, David Simonin
2007 J jnl
Approximate Gauss-Newton Methods for Nonlinear Least Squares Problems.
SIAM J. Optim.
Serge Gratton, Amos S. Lawless, Nancy K. Nichols
2002 J jnl
Robust Pole Assignment in Descriptor Linear Systems via State Feedback.
Eur. J. Control
Guang-Ren Duan, Nancy K. Nichols, Guo-Ping Liu
2001 J jnl
Robust Eigenstructure Assignment in Quadratic Matrix Polynomials: Nonsingular Case.
SIAM J. Matrix Anal. Appl.
Nancy K. Nichols, Jaroslav Kautsky
2001 — conf
Robust pole assignment in descriptor linear systems via state feedback.
ECC
Guang-Ren Duan, Nancy K. Nichols, Guo-Ping Liu
1994 J jnl
Regularization of descriptor systems by output feedback.
IEEE Trans. Autom. Control.
Angelika Bunse-Gerstner, Volker Mehrmann, Nancy K. Nichols
1992 J jnl
Regularization of Descriptor Systems by Derivative and Proportional State Feedback.
SIAM J. Matrix Anal. Appl.
Angelika Bunse-Gerstner, Volker Mehrmann, Nancy K. Nichols
1984 J jnl
Smoothed histogram modification for image processing.
Comput. Vis. Graph. Image Process.
Jaroslav Kautsky, Nancy K. Nichols, David L. B. Jupp
1966 — —
Matrix iterative methods for elliptic differential equations.
Nancy K. Nichols