Results 71 to 80 of about 3,534,092 (344)

Two Inverse Eigenproblems for Certain Symmetric and Nonsymmetric Pentadiagonal Matrices

open access: yesMathematics, 2022
In this paper, we give sufficient conditions for the construction of certain symmetric and nonsymmetric pentadiagonal matrices from particular spectral information.
S. Arela-Pérez   +3 more
doaj   +1 more source

Fermionic approach to the evaluation of integrals of rational symmetric functions

open access: yes, 2007
We use the fermionic construction of two-matrix model partition functions to evaluate integrals over rational symmetric functions. This approach is complementary to the one used in the paper ``Integrals of Rational Symmetric Functions, Two-Matrix Models ...
A. Gerasimov   +26 more
core   +2 more sources

IS THE QUARK-MIXING MATRIX MODULI SYMMETRIC? [PDF]

open access: yesModern Physics Letters A, 2004
If the unitary quark-mixing matrix, V, is moduli symmetric, it will depend on three real parameters. This means that there is a relation between the four parameters needed to parametrize a general V. It is shown that there exists a very simple relation involving |V11|2, |V33|2, [Formula: see text] and [Formula: see text].
S. Chaturvedi, Virendra Gupta
openaire   +3 more sources

Random Learning Leads to Faster Convergence in ‘Model‐Free’ ILC: With Application to MIMO Feedforward in Industrial Printing

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
The cost as a function of the number of experiments for a non‐symmetric 21×21$$ 21\times 21 $$ system. Four approaches are shown: the proposed stochastic conjugate gradient ILC (SCGILC) method (), deterministic conjugate gradient ILC (), stochastic gradient descent ILC () and deterministic gradient descent ILC ().
Leontine Aarnoudse, Tom Oomen
wiley   +1 more source

Inverse Numerical Range and Determinantal Quartic Curves

open access: yesMathematics, 2020
A hyperbolic ternary form, according to the Helton–Vinnikov theorem, admits a determinantal representation of a linear symmetric matrix pencil. A kernel vector function of the linear symmetric matrix pencil is a solution to the inverse numerical range ...
Mao-Ting Chien, Hiroshi Nakazato
doaj   +1 more source

Hypergraphs and hypermatrices with symmetric spectrum

open access: yes, 2016
It is well known that a graph is bipartite if and only if the spectrum of its adjacency matrix is symmetric. In the present paper, this assertion is dissected into three separate matrix results of wider scope, which are extended also to hypermatrices. To
Nikiforov, V.
core   +1 more source

Neural Network Adaptive Control With Long Short‐Term Memory

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
ABSTRACT In this study, we propose a novel adaptive control architecture that provides dramatically better transient response performance compared to conventional adaptive control methods. This is accomplished by the synergistic employment of a traditional adaptive neural network (ANN) controller and a long short‐term memory (LSTM) network.
Emirhan Inanc   +4 more
wiley   +1 more source

Partially Ordered Group of the 2×2 Symmetric Matrices

open access: yesInPrime, 2019
This paper deals with the partially ordered group of the 2×2 symmetric matrices. A matrix is defined to be a positive if each entry of the matrix is positive. With the characterization of the 2×2 symmetric matrix, we construct the positive cone such that
Irmatul Hasanah
doaj   +1 more source

Analysis of Temperature and Stress Distribution on the Bond Properties of Hybrid Tailored Formed Components

open access: yesAdvanced Engineering Materials, EarlyView.
Hybrid materials enable high‐performance components but are challenging to process. This study explores an inductive heating concept with spray cooling for steel–aluminum specimens in a two‐step process including friction welding and cup backward extrusion.
Armin Piwek   +7 more
wiley   +1 more source

A note on multilevel Toeplitz matrices

open access: yesSpecial Matrices, 2019
Chien, Liu, Nakazato and Tam proved that all n × n classical Toeplitz matrices (one-level Toeplitz matrices) are unitarily similar to complex symmetric matrices via two types of unitary matrices and the type of the unitary matrices only depends on the ...
Cao Lei, Koyuncu Selcuk
doaj   +1 more source

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