Results 41 to 50 of about 437,926 (227)

A Toeplitz Jacobian Matrix/Fast Fourier Transformation Method for Steady-State Analysis of Discontinuous Oscillators

open access: yesShock and Vibration, 1995
A semianalytical algorithm is proposed for the solutions and their stability of a piecewise nonlinear system. The conventional harmonic balance method is modified by the introduction of Toeplitz Jacobian matrices (TJM) and by the alternative applications
T. Ge, A. Y. T. Leung
doaj   +1 more source

The Application of Fractional Derivative Viscoelastic Models in the Finite Element Method: Taking Several Common Models as Examples

open access: yesFractal and Fractional
This paper aims to incorporate the fractional derivative viscoelastic model into a finite element analysis. Firstly, based on the constitutive equation of the fractional derivative three-parameter solid model (FTS), the constitutive equation is ...
Guozhi Zheng, Naitian Zhang, Songtao Lv
doaj   +1 more source

Two-Step Fifth-Order Efficient Jacobian-Free Iterative Method for Solving Nonlinear Systems

open access: yesMathematics
This article introduces a novel two-step fifth-order Jacobian-free iterative method aimed at efficiently solving systems of nonlinear equations. The method leverages the benefits of Jacobian-free approaches, utilizing divided differences to circumvent ...
Alicia Cordero   +3 more
doaj   +1 more source

Nonlinear H-infinity control for switched reluctance machines

open access: yesNonlinear Engineering, 2019
The article proposes a nonlinear H-infinity control method for switched reluctance machines. The dynamic model of the switched reluctance machine undergoes approximate linearization round local operating points which are redefined at each iteration of ...
Rigatos Gerasimos   +2 more
doaj   +1 more source

Kinematic Analysis Of Tricept Parallel Manipulator

open access: yesInternational Islamic University Malaysia Engineering Journal, 2012
Parallel manipulators consist of fixed and moving platforms connected to each other with some actuated links. They have some significant advantages over their serial counterparts.
Mir Amin Hosseini   +1 more
doaj   +1 more source

Continuous Stiffness Graded Metal–Ceramic Femoral Stems: UMAT‐Based Design and Finite Element Assessment

open access: yesAdvanced Engineering Materials, EarlyView.
Functionally graded metal–ceramic femoral stems are engineered through continuous UMAT‐based stiffness tailoring, eliminating discrete material interfaces while enhancing biomechanical compatibility. Low‐index power‐law gradation optimizes load transfer, reduces stress shielding, and controls implant–bone micromotion, highlighting a materials‐design ...
Rihem Nouira, Sameh Elleuch, Hanen Jrad
wiley   +1 more source

Iterative parameter identification and compensation for robots using special Jacobian matrices.

open access: yes, 1991
Iterative parameter identification and compensation for robots using special Jacobian ...
Clifford Robert. Mirman (7954832)
core   +6 more sources

Hybrid block formulae whose eigenvalues of Jacobian matrices are close to the imaginary axis of the complex plane

open access: yesRecent Advances in Natural Sciences
Methods for integrating stiff initial value problems are required to be A-stable. Of great interest are A-stable methods whose Jacobian matrices have their eigenvalues close to the imaginary axis of the complex plane.
James kona, Kingsley Muka
doaj   +1 more source

Simulation‐Based Analysis of Insert Pull‐Out in Nickel‐Polyurethane Hybrid Foams Using CT‐Derived Geometries

open access: yesAdvanced Engineering Materials, EarlyView.
CT‐based finite element simulations combined with in situ X‐ray computed tomography are used to analyze insert pull‐out in nickel‐coated polymer foams. Despite variations in material parameters, deformation consistently concentrates within a narrow annular region around the insert.
Yannik Bautz   +4 more
wiley   +1 more source

Challenges of inversely estimating Jacobian from metabolomics data

open access: yesFrontiers in Bioengineering and Biotechnology, 2015
Inferring dynamics of metabolic networks directly from metabolomics data provides a promising way to elucidate the underlying mechanisms of biological systems, as reported in our previous studies [1-3] by a differential Jacobian approach. The Jacobian is
Xiaoliang eSun   +4 more
doaj   +1 more source

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