Results 11 to 20 of about 666,240 (259)

On a virtual work consistent three-dimensional Reissner–Simo beam formulation using the quaternion algebra

open access: yesActa Mechanica, 2013
In the paper, we present the Reissner–Simo beam theory in which the rotations are represented by quaternions. From the generalized virtual work principle, where the unity constraint of the rotational quaternion is properly considered and the consistent ...
E. Zupan, M. Saje, D. Zupan
semanticscholar   +3 more sources

Existence of Split Property in Quaternion Algebra Over Composite of Quadratic Fields

open access: yesCauchy: Jurnal Matematika Murni dan Aplikasi, 2023
Quaternions are extensions of complex numbers that are four-dimensional objects. Quaternion consists of one real number and three complex numbers, commonly denoted by the standard vectors  and .
Muhammad Faldiyan   +2 more
doaj   +1 more source

A Comparative Study of Three Inverse Kinematic Methods of Serial Industrial Robot Manipulators in the Screw Theory Framework

open access: yesInternational Journal of Advanced Robotic Systems, 2011
In this paper, we compare three inverse kinematic formulation methods for the serial industrial robot manipulators. All formulation methods are based on screw theory.
Emre Sariyildiz   +2 more
doaj   +2 more sources

RKHS Representations for Augmented Quaternion Random Signals: Application to Detection Problems

open access: yesMathematics, 2022
The reproducing kernel Hilbert space (RKHS) methodology has shown to be a suitable tool for the resolution of a wide range of problems in statistical signal processing both in the real and complex domains.
Antonia Oya
doaj   +1 more source

Generalised quadratic forms and the u-invariant [PDF]

open access: yes, 2017
The u-invariant of a field is the supremum of the dimensions of anisotropic quadratic forms over the field. We define corresponding u-invariants for hermitian and generalised quadratic forms over a division algebra with involution in characteristic 2 and
Dolphin, Andrew
core   +2 more sources

Algebraic Techniques for Canonical Forms and Applications in Split Quaternionic Mechanics

open access: yesJournal of Mathematics, 2023
The algebra of split quaternions is a recently increasing topic in the study of theory and numerical computation in split quaternionic mechanics. This paper, by means of a real representation of a split quaternion matrix, studies the problem of canonical
Tongsong Jiang   +4 more
doaj   +1 more source

A System of Coupled Two-sided Sylvester-type Tensor Equations over the Quaternion Algebra

open access: yesTaiwanese journal of mathematics, 2020
We establish some necessary and sufficient conditions for the solvability to a system of a pair of coupled two-sided Sylvester-type tensor equations over the quaternion algebra.
Qing-Wen Wang, Xiao Wang
semanticscholar   +1 more source

Unitary Diagonalization of the Generalized Complementary Covariance Quaternion Matrices with Application in Signal Processing

open access: yesMathematics, 2023
Let H denote the quaternion algebra. This paper investigates the generalized complementary covariance, which is the ϕ-Hermitian quaternion matrix. We give the properties of the generalized complementary covariance matrices.
Zhuo-Heng He   +2 more
doaj   +1 more source

Helmert Transformation Problem. From Euler Angles Method to Quaternion Algebra

open access: yesISPRS Int. J. Geo Inf., 2020
The three-dimensional coordinate’s transformation from one system to another, and more specifically, the Helmert transformation problem, is one of the most well-known transformations in the field of engineering.
S. Ioannidou, G. Pantazis
semanticscholar   +1 more source

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