Results 21 to 30 of about 30,661 (276)

Sizing and Least-Change Secant Methods [PDF]

open access: yesSIAM Journal on Numerical Analysis, 1993
This paper studies a new secant update for nonlinear minimization. This update is based on a least-change principle involving the matrix trace: Consequently, all eigenvalues are taken into account in the determination of the update. In addition to motivation and analysis, computational results/comparisons are provided.
Dennis, J. E. jun., Wolkowicz, Henry
openaire   +2 more sources

A non-Secant quasi-Newton Method for Unconstrained Nonlinear Optimization

open access: yesCogent Engineering, 2022
The Secant equation has long been the foundation of quasi-Newton methods, as updated Hessian approximations satisfy the equation with each iteration. Several publications have lately focused on modified versions of the Secant relation, with promising ...
Issam A.R. Moghrabi
doaj   +1 more source

Study on the size effect of the secant modulus of rocks containing multiple parallel joints

open access: yesFrontiers in Materials, 2022
The secant modulus of the rock reflects the stiffness of the rock and the ability to resist deformation. There are significant differences in the secant modulus of the rock due to the different numbers of joints in the rock and the change in rock size ...
Jing Zhang   +7 more
doaj   +1 more source

COMPARATIVE STUDY OF NONLINEAR ROOT FINDING USING IMPROVISED SECANT METHODS

open access: yesMalaysian Journal of Computing, 2023
he nonlinear transcendental or algebraic equation problem is one of the important research areas in numerical analysis, and the iterative methods are playing an important role to find approximate solutions.
Nurul Nabilah Rosli   +3 more
doaj   +1 more source

Moment Identifiability of Homoscedastic Gaussian Mixtures [PDF]

open access: yes, 2020
We consider the problem of identifying a mixture of Gaussian distributions with same unknown covariance matrix by their sequence of moments up to certain order. Our approach rests on studying the moment varieties obtained by taking special secants to the
Agostini, Daniele   +2 more
core   +2 more sources

Least-Change Sparse Secant Update Methods with Inaccurate Secant Conditions [PDF]

open access: yesSIAM Journal on Numerical Analysis, 1985
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Dennis, J. E. jun., Walker, Homer F.
openaire   +2 more sources

Homotopy Analysis-Based Hybrid Genetic Algorithm and Secant Method to Solve IVP and Higher-Order BVP

open access: yesIEEE Access, 2021
The analytical solution of the Initial Value Problem (IVP) and the Boundary Value Problem (BVP) is an essential issue in numerous engineering applications. However, it cannot usually be realized by simple methods.
Hala A. Omar
doaj   +1 more source

Asymmetric regular sampling SPWM method based on tangent-secant midpoint approximation applied to intermediate frequency inverter power supply

open access: yesZhongguo Jianchuan Yanjiu, 2022
ObjectiveIn order to reduce the switching frequency of an intermediate frequency inverter power supply, ensure the quality of the output waveform and realize digitalization easily, a SPWM sampling method based on a tangent-secant midpoint approximation ...
Weibo LI   +4 more
doaj   +1 more source

Novel hybrid algorithms for root determining using advantages of open methods and bracketing methods

open access: yesAlexandria Engineering Journal, 2022
There are two numerical approaches for root determining methods: open methods and bracketing methods. Open methods usually converge much more quickly than the bracketing methods, but they may diverge in some cases.
Elsayed Badr   +2 more
doaj   +1 more source

Kajian Metode Secant dalam Persamaan Tahapan Standar untuk Menyelesaikan Profil Aliran Berubah Beraturan

open access: yesTeknologi dan Kejuruan, 2009
There are some techniques in calculating the reguler-changed flows, for instance the equation of standard phase that uses trial and error calculations . Some method then is developed from Newton-Raphson method, namely SECANT method.
Pribadi Pribadi
doaj   +1 more source

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