In collaboration with Payame Noor University and the Iranian Society of Instrumentation and Control Engineers
Control Theory & Systems
Ritz-Approximation Method for Solving Variable-Order Fractional Mobile-Immobile Advection-Dispersion Equations

Sommayeh Sheykhi; Mashallah Matinfar; Mohammad Arab Firoozjaee

Articles in Press, Accepted Manuscript, Available Online from 31 October 2025

https://doi.org/10.30473/coam.2025.72692.1267

Abstract
  The advection-dispersion, variable-order differential equations have a vast application in fluid physics and energy systems. ‎In this study, ‎we propose a Ritz-approximation method using shifted Legendre polynomials to construct approximate numerical solutions for these equations‎. ‎The ...  Read More

Control Theory & Systems
Existence and Uniqueness of High-Order Caputo Fractional Boundary Value Problems under General Non-Local Multi-Point Conditions‎: ‎Analytical and Semi-Analytical Approaches

Salam Mcheik‎; Elyas Shivanian; Youssef El Seblani

Volume 10, Issue 2 , July 2025, , Pages 153-184

https://doi.org/10.30473/coam.2025.74523.1309

Abstract
  In this paper‎, ‎we investigate the existence and uniqueness of solutions for a high-order boundary value problem involving non-integer derivatives‎, ‎specifically utilizing the Caputo fractional derivative‎. ‎The problem is subject to non-local boundary conditions‎. ‎To ...  Read More

Control Theory & Systems
Mathematical Modeling and Optimal Control of Carbon Dioxide Emissions

Fahimeh Akhavan Ghassabzade; Mina Bagherpoorfard

Volume 9, Issue 1 , May 2024, , Pages 195-202

https://doi.org/10.30473/coam.2023.67777.1233

Abstract
  ‎This paper aims to demonstrate the flexibility of mathematical models in analyzing carbon dioxide emissions and account for memory effects. ‎The use of real data amplifies the importance of this study‎. ‎This research focuses on developing a mathematical model utilizing fractional-order ...  Read More