doi:10.24996/ijs.2023.64.3.26

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Publication Date

Tue Feb 28 2023

Journal Name

Iraqi Journal Of Science

Volume

64

Issue Number

3

DOI

10.24996/ijs.2023.64.3.26

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Solving Linear and Nonlinear Fractional Differential Equations Using Bees Algorithm

fractional differential equations

Bees algorithm

Chebyshev polynomials

Caputo derivative

Numerical solution

Metaheuristic algorithm

Azzam S.Y.

Abdulrazzaq T.

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A numerical algorithm for solving linear and non-linear fractional differential equations is proposed based on the Bees algorithm and Chebyshev polynomials. The proposed algorithm was applied to a set of numerical examples. Faster results are obtained compared to the wavelet methods.

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Publication Date

Thu Apr 06 2023

Journal Name

Materials Science Forum

Study of the Effect of Ce 3+ on the Gas Sensitivity and Magnetic Properties of CuxCe0.3-XNi0.7Fe2O4 Ferrite Nanoparticles

Tagreed M.

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This study includes the preparation of the ferrite nanoparticles Cu_xCe_0.3-XNi_0.7Fe₂O₄ (where: x = 0, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3) using the sol-gel (auto combustion) method, and citric acid was used as a fuel for combustion. The results of the tests conducted by X-ray diffraction (XRD), emitting-field scanning electron microscopy (FE-SEM), energy-dispersive X-ray analyzer (EDX), and Vibration Sample Magnetic Device (VSM) showed that the compound has a face-centered cubic structure, and the lattice constant is increased with increasing Cu ion. On the other hand, the compound has apparent porosity and spherical particles, and t

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Publication Date

Sun Jan 30 2022

Journal Name

Iraqi Journal Of Science

A certain Subclass of Meromorphically Multivalent Q-Starlike Functions Involving Higher-Order Q-Derivatives

Multivalent functions

Meromorphically starlike functions

q-derivative(or q-difference) operator

Distortion theorems

Radius of q-starlikeness

close-to-convexity

convexity

Hadamard product

Mustafa I.

Muna H.

Buthyna Najad

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The authors introduced and addressed several new subclasses of the family of meromorphically multivalent -star-like functions in the punctured unit disk in this study, which makes use of several higher order -derivatives. Many fascinating properties and characteristics are extracted systematically for each of these newly identified function classes. Distortion theorems and radius problems are among these characteristics and functions. A number of coefficient inequalities for functions belonging to the subclasses are studied, and discussed, as well as a suitable condition for them is set. The numerous results are presented in this study and the previous works on this

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Publication Date

Sat Apr 01 2017

Journal Name

Journal Of Economics And Administrative Sciences

Application the generalized estimating equation Method (GEE) to estimate of conditional logistic regression model for repeated measurements

Conditional logistic regression

repeated measurements

generalized estimation equations method (GEE)

Robust Sandwich Estimators (RSE)

Model Selection Criteria

working correlation structure

Cluster analysis.

انتصار عريبي

يوسف خليل

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Conditional logistic regression is often used to study the relationship between event outcomes and specific prognostic factors in order to application of logistic regression and utilizing its predictive capabilities into environmental studies. This research seeks to demonstrate a novel approach of implementing conditional logistic regression in environmental research through inference methods predicated on longitudinal data. Thus, statistical analysis of longitudinal data requires methods that can properly take into account the interdependence within-subjects for the response measurements. If this correlation ignored then inferences such as statistical tests and confidence intervals can be invalid largely.

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