Mustafa Mamat

Universiti Sultan Zainal Abidin

AlgorithmGradient methodMathematical optimizationMathematical analysisGradient descentNonlinear systemAttractorDerivation of the conjugate gradient methodNonlinear conjugate gradient methodChaoticDescent (mathematics)Applied mathematicsUnconstrained optimizationMathematicsComputer scienceControl theoryConvergence (routing)Conjugate gradient methodLine searchConjugate residual method

320Publications

15H-index

1,057Citations

Publications 366

Derivative Free Conjugate Gradient Method via Broyden’s Update for solving symmetric systems of nonlinear equations

#1M. K. DaudaH-Index: 3

#2Mustafa MamatH-Index: 15

Last. M. Y. WaziriH-Index: 4

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A Derivative-Free Decent Method Via Acceleration Parameter for Solving Systems of Nonlinear Equations

#1Abubakar Sani HaliluH-Index: 1

#1Abubakar Sani HaliluH-Index: 4

Last. Mohamad Hafiz MamatH-Index: 21

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An algorithm for solving large-scale systems of nonlinear equations based on the transformation of the Newton method with the line search into a derivative-free descent method is introduced. Main idea used in the algorithm construction is to approximate the Jacobian by an appropriate diagonal matrix. Furthermore, the step length is calculated using inexact line search procedure. Under appropriate conditions, the proposed method is proved to be globally convergent under mild conditions. The numer...

#1M. K. DaudaH-Index: 3

Last. Mohamad Hafiz MamatH-Index: 21

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In mathematical term, the method of solving models and finding the best alternatives is known as optimization. Conjugate gradient (CG) method is an evolution of computational method in solving optimization problems. In this article, an alternative modified conjugate gradient coefficient for solving large-scale nonlinear system of equations is presented. The method is an improved version of the Rivaie et el conjugate gradient method for unconstrained optimization problems. The new CG is tested on...

A new 4-D hyperchaotic hyperjerk system with a single equilibrium, its dynamic properties and circuit design

#1Sundarapandian VaidyanathanH-Index: 3

#1Sundarapandian VaidyanathanH-Index: 81

Last. W. S. Mada Sanjaya

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#1Sundarapandian VaidyanathanH-Index: 81

#2Aceng SambasH-Index: 12

Last. Mustafa Mamat (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 15

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Chaos theory has several applications in science and engineering. In this work, we announce a new two-scroll chaotic system with two nonlinearities. The dynamical properties of the system such as dissipativity, equilibrium points, Lyapunov exponents, Kaplan-Yorke dimension and bifurcation diagram are explored in detail. The presence of coexisting chaotic attractors, coexisting chaotic and periodic attractors in the system is also investigated. In addition, the offset boosting of a variable in th...

#1A. O Umar (UniSZA: Universiti Sultan Zainal Abidin)

#2M Mamat (UniSZA: Universiti Sultan Zainal Abidin)

Last. M.Y Waziri (Bayero University Kano)

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Microstructure and inertial effects on natural convection micropolar nanofluid flow about a solid sphere

#1Mohammed Z. Swalmeh (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 3

#2Hamzeh T. AlkasasbehH-Index: 8

Last. Mustafa Mamat (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 15

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Abstract:The addition of nanoparticles is one of the modern scientific techniques to improve the heat transfer enhancement. However, micropolar fluid model is not examined under nanoparticles effec...

#1Y. Salih

Last. Mustafa Mamat (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 15

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Modelling the contribution of CO2 emissions from fuel used on total CO2 emissions at power generation in Indonesia

#1Ruly Budiono (UNPAD: Padjadjaran University)H-Index: 1

#2Hafizan Juahir (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 28

Last. M. Z. Nurzaman (UNPAD: Padjadjaran University)H-Index: 2

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For electricity production, humans use fossil fuels, such as coal, fuel oil, diesel oil, and gas. The use of these fuels is a major source of greenhouse gas emissions, especially carbon dioxide (CO2) gases. In this paper, we have proposed the model of CO2 emissions from the fuel used to total CO2, in electricity production in Indonesia. Modelling is done by using multiple linear regression, while the parameter estimation is done by using ordinary least square method (OLS). The data used are CO2 ...

A New Double-Wing Chaotic System With Coexisting Attractors and Line Equilibrium: Bifurcation Analysis and Electronic Circuit Simulation

#1Aceng SambasH-Index: 12

#2Sundarapandian VaidyanathanH-Index: 81

Last. Mustafa Mamat (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 15

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This research work reports a double-wing chaotic system with a line of equilibrium points and constructs an electronic circuit via MultiSIM for practical implementation. Explicitly, the new chaotic system has a total of six terms with two quadratic nonlinearities and absolute function nonlinearity. Using the phase plots in MATLAB, we demonstrate that the new chaotic system has double-wing chaotic attractor. We describe the Lyapunov exponents and the Kaplan-Yorke fractal dimension of the new chao...

Close Researchers

Mohd Rivaie

H-index : 7

Aceng Sambas

H-index : 12

Ibrahim Mohammed Sulaiman

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Sundarapandian Vaidyanathan

H-index : 81

Yicheng Zeng

H-index : 2

Zabidin Salleh

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Abid Hussanan

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Mohamad Afendee Mohamed

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Sukono

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Ismail Mohd

H-index : 8