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
Newest
#1M. K. DaudaH-Index: 3
#2Mustafa MamatH-Index: 15
Last. M. Y. WaziriH-Index: 4
view all 5 authors...
Source
Last. Mohamad Hafiz MamatH-Index: 21
view all 4 authors...
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...
1 CitationsSource
#1M. K. DaudaH-Index: 3
Last. Mohamad Hafiz MamatH-Index: 21
view all 4 authors...
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...
Source
view all 5 authors...
Source
#2Aceng SambasH-Index: 12
Last. Mustafa Mamat (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 15
view all 6 authors...
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...
3 CitationsSource
#1A. O Umar (UniSZA: Universiti Sultan Zainal Abidin)
#2M Mamat (UniSZA: Universiti Sultan Zainal Abidin)
Last. M.Y Waziri (Bayero University Kano)
view all 3 authors...
Source
#1Mohammed Z. Swalmeh (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 3
Last. Mustafa Mamat (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 15
view all 5 authors...
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...
4 CitationsSource
Last. Mustafa Mamat (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 15
view all 4 authors...
Source
#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
view all 6 authors...
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 ...
Source
#1Aceng SambasH-Index: 12
Last. Mustafa Mamat (UniSZA: Universiti Sultan Zainal Abidin)H-Index: 15
view all 6 authors...
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...
18 CitationsSource