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Register a new userNew Hybrid Conjugate Gradient Method with Global Convergence Properties for Unconstrained Optimization
طريقة هجينة جديدة لطرق التدرج المترافق لحل الامثلية الغير مقيدة
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محمد حموده
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إن خوارزميات التدرج المترافق هامة لحل مسائل الأمثليات غـير المقيدة، لذلك نقدم في هذا البحث خوارزمية هجينة لتدرج مترافق تعتمد عمى تحسين معامل الترافق الذي يحقق شرط الانحدار الكافي والتقارب الشامل
Nonlinear conjugate gradient (CG) method holds an important role in solving large-scale unconstrained optimization problems. In this paper, we suggest a new modification of CG coefficient �� that satisfies sufficient descent condition and possesses global convergence property under strong Wolfe line search. The numerical results show that our new method is more efficient compared with other CG formulas tested.
References used
Dai, Y.-H., and Yuan, Y. (1999). A nonlinear conjugate gradient method with a strong global convergence property. SIAM Journal on optimization, 10(1), 177-182.
Dai, Z., and Wen, F. (2012). Another improved Wei–Yao–Liu nonlinear conjugate gradient method with sufficient descent property. Applied Mathematics and Computation, 218(14), 7421-7430.
Dolan, E. D., and Moré, J. J. (2002). Benchmarking optimization software with performance profiles. Mathematical programming, 91(2), 201-213
Hamoda, M., Mamat, M., Rivaie, M., and Salleh, Z. (2016). A Conjugate Gradient Method with Strong Wolfe-Powell Line Search for Unconstrained Optimization. Applied Mathematical Sciences, 10(15), 721-734.
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Conjugate gradient algorithms are important for solving unconstrained optimization
problems, so that we present in this paper conjugate gradient algorithm depending on
improving conjugate coefficient achieving sufficient descent condition and globa
l
convergence by doing hybrid between the two conjugate coefficients [1] and
[2]. Numerical results show the efficiency of the suggested algorithm after its
application on several standard problems and comparing it with other conjugate gradient
algorithms according to number of iterations, function value and norm of gradient vector.
Multi-objective evolutionary algorithms are used in a wide range
of fields to solve the issues of optimization, which require several
conflicting objectives to be considered together. Basic evolutionary
algorithm algorithms have several drawbacks,
such as lack of a
good criterion for termination, and lack of evidence of good
convergence. A multi-objective hybrid evolutionary algorithm is
often used to overcome these defects.
optimization
الأمثلة
الأمثلة متعددة الأهداف
الخوارزميات التطورية
الخوارزميات التطورية المتعددة الأهداف
الخوارزميات التطورية عديدة الأهداف
(Multi-Objective Optimization (MO
Evolutionary Algorithms
(Multi-Objective Evolutionary Algorithms (MOEAs
(Many-Objective Evolutionary Algorithms (MaOEAs
المزيد..
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corrector part of the algorithm.
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methods as (STEM Method[6] – Improvement STEM Method[7] – Matejas-peric
Method[8]). Numerical results indicate that the efficiency of purposed method comparing
with the obtained results by using that methods at initial solution point and the other
interactive points with decision maker.
The majority of recent digital signature algorithms depend, in their
structure, on complicated mathematical concepts that require a long
time and a significant computational effort to be executed. As a
trial to reduce these problems, some researchers have proposed
digital signature algorithms which depend on simple arithmetic
functions and operations that are executed quickly, but that was at
the expense of the security of algorithms.
suggested questions
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