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Mathematical and Computational Applications, Volume 29, Issue 1

2024 February - 16 articles

Cover Story: We are researching the free vibration of functionally graded material (FGM) plates with complex shapes. We consider a two-parameter elastic foundation (Winkler and Pasternak) and two types of porosity distributions through the thickness: even and uneven. Our approach is based on the variational Ritz method, combined with R-functions theory, and has been tested on numerous problems. The efficiency of the proposed approach is demonstrated for FGM plates with complex shapes and various boundary conditions. We investigate the effects of different parameters on vibration characteristics, such as porosity, volume exponent, elastic foundation, types of FGM, and boundary conditions. View this paper
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Articles (16)

  • Article
  • Open Access
1 Citations
2,607 Views
25 Pages

Three-Dimensional Model for Bioventing: Mathematical Solution, Calibration and Validation

  • Mohammad Khodabakhshi Soureshjani,
  • Hermann J. Eberl and
  • Richard G. Zytner

Bioventing is an established technique extensively employed in the remediation of soil contaminated with petroleum hydrocarbons. In this study, the objective was to develop an improved foundational bioventing model that characterizes gas flow in vado...

  • Article
  • Open Access
1 Citations
2,169 Views
13 Pages

In this paper, it is noted that three apparently disparate areas of mathematics—singularity analysis, complex symmetry analysis and the distributional representation of special functions—have a basic commonality in the underlying methods...

  • Article
  • Open Access
2 Citations
2,498 Views
22 Pages

On the Parallelization of Square-Root Vélu’s Formulas

  • Jorge Chávez-Saab,
  • Odalis Ortega and
  • Amalia Pizarro-Madariaga

A primary challenge in isogeny-based cryptography lies in the substantial computational cost associated to computing and evaluating prime-degree isogenies. This computation traditionally relied on Vélu’s formulas, an approach with time c...

  • Article
  • Open Access
1 Citations
3,699 Views
13 Pages

Calcium (Ca2+) and magnesium (Mg2+) are essential for cellular function. The kidneys play an important role in maintaining the homeostasis of these cations. Their reabsorption along the nephron is dependent on distinct trans- and paracellular pathway...

  • Article
  • Open Access
2 Citations
2,970 Views
23 Pages

This paper proposes the D2Q5 Lattice Boltzmann method (LBM) method, in two dimensions with five discrete lattice velocities, for simulating linear sound wave propagation in closed rooms. A second-order linear acoustic equation obtained from the LBM m...

  • Article
  • Open Access
3 Citations
3,353 Views
17 Pages

In this paper we develop an approach for obtaining the solutions to systems of linear retarded and neutral delay differential equations. Our analytical approach is based on the Laplace transform, inverse Laplace transform and the Cauchy residue theor...

  • Article
  • Open Access
15 Citations
3,604 Views
17 Pages

Free vibrations of porous functionally graded material (FGM) plates with complex shapes are analyzed by using the R-functions method. The thickness of the plate is variable in the direction of one of the axes. Two types of porosity distributions thro...

  • Article
  • Open Access
1 Citations
2,841 Views
17 Pages

Continuous Time Echo State Networks (CTESNs) are a promising yet under-explored surrogate modeling technique for dynamical systems, particularly those governed by stiff Ordinary Differential Equations (ODEs). A key determinant of the generalization a...

  • Article
  • Open Access
8 Citations
5,485 Views
16 Pages

Electromyography (EMG) is a widely used method for estimating muscle activity and could help in understanding how muscles interact with each other and affect human movement control. To detect muscle interactions during elbow flexion and extension, a...

  • Article
  • Open Access
2,384 Views
16 Pages

In this paper, we propose an extended credit migration model with asymmetric fixed boundaries and multiple ratings, for a more precise depiction of credit changes in the real world. A model with three ratings is established and analyzed as an example...

  • Article
  • Open Access
2 Citations
2,352 Views
15 Pages

In this paper, a second-order operator splitting method combined with the barycentric Lagrange interpolation collocation method is proposed for the nonlinear Schrödinger equation. The equation is split into linear and nonlinear parts: the linear...

  • Article
  • Open Access
1 Citations
2,517 Views
20 Pages

A permanent gravity wave propagating on deep water is a classic mathematical problem. However, the Fourier series approximation (FSA) based on the physical plane was examined to be valid for almost waves at all depths. The accuracy of the FSA for alm...

  • Article
  • Open Access
1 Citations
2,213 Views
13 Pages

Small-scale photovoltaic (PV) systems are essential for the local energy supply. The most commonly known PV cell is configured as a large-area p–n junction made from silicon, but PV systems today include PV cells of various manufactures and ori...

  • Article
  • Open Access
5 Citations
3,012 Views
33 Pages

Role Reversals in a Tri-Trophic Prey–Predator Interaction System: A Model-Based Study Using Deterministic and Stochastic Approaches

  • Sk Golam Mortoja,
  • Ayan Paul,
  • Prabir Panja,
  • Sabyasachi Bhattacharya and
  • Shyamal Kumar Mondal

It is frequently observed that adult members of prey species sometimes use their predation mechanism on juvenile members of predator species. Ecological literature describes this phenomenon as prey–predator role reversal dynamics.Numerous autho...

  • Article
  • Open Access
4 Citations
4,433 Views
21 Pages

In this paper, we develop a finite difference method for solving the wave equation with fractional damping in 1D and 2D cases, where the fractional damping is given based on the Caputo fractional derivative. Firstly, based on the weighted method, we...

  • Article
  • Open Access
2,590 Views
22 Pages

Simulation of a Thermal Recuperative Incinerator of VOCs with a Special Focus on the Heat Exchanger

  • Francisco Zdanowski,
  • Isabel Malico,
  • Paulo Canhoto and
  • Rui Pedro Lima

Simulation and modeling of thermal recuperative incinerators may play an important role in enhancing efficiency and ensuring compliance with environmental regulations. In this context, the primary objective of this study is to simulate and comprehens...

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Math. Comput. Appl. - ISSN 2297-8747