A modified nonlinear conjugate gradient algorithm for unconstrained optimization

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dc.contributor.authorBabaie-Kafaki, Saman
dc.contributor.authorGhanbari, Reza
dc.contributor.authorMahdavi-Amiri, Nezam
dc.date.accessioned2024-07-12T20:51:09Z
dc.date.available2024-07-12T20:51:09Z
dc.date.issued2009en_US
dc.departmentFakülteler, İnsan ve Toplum Bilimleri Fakültesi, Matematik Bölümüen_US
dc.description.abstractConjugate gradient (CG) algorithms have played special roles in solving large scale nonlinear optimization problems with smooth objective functions f : R n ? R. Search directions in the CG algorithms are generated by the sequence d1 = ??f(x1) and dk = ??f(xk) + ?kdk?1, for k ? 2. By introducing different conjugacy conditions, researchers proposed different formulas for ?k. The related CG algorithms may have quite different behaviors for general functions. Recently, Dai and Liao [1] proposed some new formulas for ?k based on the standard secant equation. On the basis of the idea proposed by Dai and Liao, researchers made some efforts to obtain new formulas for ?k [2, 4, 5]. Here, we first make a modification on the secant equation proposed by Zhang and Xu [3], and then, using our modified secant equation and Dai-Liao’s approach, we propose a new conjugacy condition and obtain a new formula for ?k. It can be shown that under some proper conditions our CG algorithm is globally convergent for general functions. Numerical results showed that our algorithm is competitive and sometimes preferable to some recently proposed CG algorithms.en_US
dc.identifier.citationBabaie-Kafaki, S., Ghanbari, R. ve Mahdavi-Amiri, N. (2009). A modified nonlinear conjugate gradient algorithm for unconstrained optimization. Maltepe Üniversitesi. s. 359.en_US
dc.identifier.endpage360en_US
dc.identifier.isbn9.78605E+12
dc.identifier.startpage359en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12415/2363
dc.language.isoenen_US
dc.publisherMaltepe Üniversitesien_US
dc.relation.ispartofInternational Conference of Mathematical Sciencesen_US
dc.relation.publicationcategoryUluslararası Konferans Öğesi - Başka Kurum Yazarıen_US
dc.rightsCC0 1.0 Universal*
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/*
dc.snmzKY07728
dc.titleA modified nonlinear conjugate gradient algorithm for unconstrained optimizationen_US
dc.typeConference Object
dspace.entity.typePublication

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