Results 41 to 50 of about 992,671 (173)

Iterative Navigator‐Based Retrospective Motion Correction for Multi‐Shot Brain MR Elastography and Evaluation of Single‐Shot Post‐Reconstruction Correction

open access: yesMagnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Brain MR elastography (MRE) is uniquely sensitive to subject motion, as even small phase deviations can produce large errors in the mechanical properties estimated. Existing motion correction strategies have not been validated for MRE and are often incompatible with complex multi‐shot or joint temporal reconstructions.
Zhuoyu Shi   +2 more
wiley   +1 more source

Generalized inverses in graph theory

open access: yesAKCE International Journal of Graphs and Combinatorics, 2023
–In this article, some interesting applications of generalized inverses in the graph theory are revisited. Interesting properties of generalized inverses are employed to make the proof of several known results simpler, and several techniques such as ...
Umashankara Kelathaya   +2 more
doaj   +1 more source

Moore–Penrose inverse of set inclusion matrices

open access: yes, 2000
Given integers s,k and v, let Wsk be the vs×vk 0–1 matrix, the rows and the columns of which are indexed by the s-subsets and the k-subsets of a v-set respectively, and where the entry in row S and column U is 1 if S⊂U and 0 otherwise.
R.B. Bapat, Bapat, R. B.
core   +1 more source

A Note About Measures, Jacobians and Moore–Penrose Inverse

open access: yes, 2020
Some general problems of Jacobian computations in non-full rank matrices are revised in this work. We prove that the Jacobian of the Moore Penrose inverse derived via matrix differential calculus is incorrect.
Caro-Lopera F.J., Díaz-García J.A.
core   +1 more source

Spectral analysis of large reflexive generalized inverse and Moore-Penrose inverse matrices [PDF]

open access: yes, 2020
A reflexive generalized inverse and the Moore-Penrose inverse are often confused in statistical literature but in fact they have completely different behaviour in case the population covariance matrix is not a multiple of identity.
Parolya, Nestor   +3 more
core   +1 more source

High‐Order Sliding‐Mode control for MIMO Systems

open access: yesInternational Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT This paper extends Lyapunov‐based homogeneous high‐order sliding‐mode control to a class of uncertain non‐square multi‐input multi‐output (MIMO) nonlinear systems with a well‐defined vector relative degree. The considered systems admit a normal‐form representation with an uncertain but full‐row‐rank input‐gain matrix.
Jaime A. Moreno, Angel Mercado‐Uribe
wiley   +1 more source

On the mean and dispersion of the Moore-Penrose generalized inverse of a Wishart matrix [PDF]

open access: yes, 2020
The Moore-Penrose inverse of a singular Wishart matrix is studied. When the scale matrix equals the identity matrix the mean and dispersion matrices of the Moore-Penrose inverse are known. When the scale matrix has an arbitrary structure no exact results
Imori, Shinpei, Von Rosen, Dietrich
core   +3 more sources

Friction‐Aware Force‐Realizable Safety Control for Four‐Wheel Independently Steered and Driven Mobile Robots

open access: yesInternational Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Safety‐critical control remains a major challenge for four‐wheel independently steered and driven (4ISD) mobile robots, where high‐accuracy path tracking and obstacle avoidance must be achieved under over‐actuated steering–driving coordination, tire–ground friction limits, and wheel‐torque constraints.
Ruitong Liu, Kenji Hashimoto
wiley   +1 more source

INVERS MOORE PENROSE PADA RING DAN SIFAT-SIFATNYA [PDF]

open access: yes, 2018
Moore-Penrose Inverse introduced on the set of matrix. All of singular matrix’s elements have Moore-Penrose Inverse. However because set of matrix on real number is a ring so Moore-Penrose Inverse can be generalized on ring. Moore-Penrose Inverse of ∈ is
Fairist Astara, Adam
core   +1 more source

Tensor‐Based Reduction of Linear Parameter‐Varying State‐Space Models

open access: yesInternational Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT The linear parameter‐varying (LPV) framework is a powerful tool for controlling nonlinear (NL) and complex systems, but the conversion of NL models into LPV forms often results in high‐dimensional and overly conservative LPV models. To be able to apply control strategies, there is often a need for model reduction in order to reduce ...
Bogoljub Terzin   +4 more
wiley   +1 more source

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