Volume 12 (2020)
Volume 11 (2019)
Volume 10 (2018)
Volume 9 (2017)
Volume 8 (2016)
Volume 7 (2015)
Volume 6 (2014)
Volume 5 (2013)
Volume 4 (2012)
Volume 3 (2011)
Volume 2 (2010)
Volume 1 (2009)


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IJO follows a stringent peer review policy. Each article is first evaluated by the editor-in-chief for the originality and scientific rigor of its research. If it passes this first test, the editor-in-chief assigns at least two peer reviewers, to determine whether it meets the rigorous scientific standards, whether it requires revisions or whether it should be rejected. Only original material that meets IJO editorial standards will be published.


1. Approximate solution of nonlinear fractional order model of HIV infection of CD4+T via Differential Quadrature Radial Basis Functions technique

Kokab Chalambari; Hamideh Ebrahimi; zainab ayati

Volume 13, Issue 1 , Spring 2021

  In this research, differential quadrature radial basis functions Method is performed to a fractional order model of HIV infection of CD4+T. Here, Caputo fractional derivative is used and it is approximated by forward finite difference method. Results have been compared with the results of Laplace Adomian ...  Read More

2. Numerical solution of Fredholm and Volterra integral equations using the normalized Müntz−Legendre polynomials

Fereshteh Saemi; Hamideh Ebrahimi; Mahmoud Shafiee

Volume 13, Issue 1 , Spring 2021

  The current research approximates the unknown function based on the normalized Müntz−Legendre polynomials (NMLPs) in conjunction with a spectral method for the solution of nonlinear Fredholm and Volterra integral equations. In this method, by using operational matrices, a system of algebraic ...  Read More

Operation Research
3. A novel solving method for multi-objective decision making problems under fuzzy conditions

Alireza Alinezhad; abolfazl kazemi; Mojgan Khorasani

Volume 13, Issue 1 , Spring 2021

  This paper proposes a satisfying optimization method for fuzzy multiple objective optimization problem. Actually, the presented method realizes the trade-off between optimization and fuzzy importance requirement. Generally, the main aim of the presented approach is to make the more important objective ...  Read More

Data Envelopment Analysis
4. Factors affecting deviations of efficiency in distance-based Common Set of Weight -DEA models

Saeid Shahghobadi

Volume 13, Issue 1 , Spring 2021

  There are different approaches to generate a common set of weights in DEA based on the p - distance measure. Deviation of an efficiency score derived from a CSW from target efficiency score may be related to the model and the parameter p. In this study, we try to clarify points about choosing p, model, ...  Read More

Data Envelopment Analysis
5. Application of DEA to measure the efficiency of Open Source software projects

Ehsan Zanboori; fatemeh Rostami; Saeid Ghobadi

Volume 13, Issue 1 , Spring 2021

  This paper evaluates the relative performance of open source software projects by evaluating multiple project inputs and multiple project outputs by using data envelopment analysis (DEA) model. The DEA model produces an efficiency score for each project based on project inputs and outputs. One of the ...  Read More

Numerical Analysis


Volume 13, Issue 1 , Spring 2021

  We propose a new self-starting sixth-order hybrid block linear multistep method using backward differentiation formula for direct solution of third-order differential equations with either initial conditions or boundary conditions. The method used collocation and interpolation techniques with three off-step ...  Read More

Numerical Analysis
7. Convergence of Triple Accelerated Over-Relaxation (TAOR) Method for M-Matrix Linear Systems

KHADEEJAH JAMES AUDU; Yusuph Amuda Yahaya; Rufus Kayode Adeboye; Usman Yusuf Abubakar

Volume 13, Issue 1 , Spring 2021

  In this paper, we propose some necessary conditions for convergence of Triple Accelerated Over-Relaxation (TAOR) method with respect to $M-$ coefficient matrices. The theoretical approach for the proofs is analyzed through some standard procedures in the literature. Some numerical experiments are performed ...  Read More

Supply Chain Management
8. A framework to design a green supply chain for the steel industry with a strategic approach (The case of Guilan province)

Sirous Balaei; Nabiollah Mohammadi; Homa Doroudi

Volume 13, Issue 1 , Spring 2021

  The present research aims to identify the factors affecting the green supply chain in the steel industry with a combined approach. The research is an applied study in type, an exploratory study in goal, a quantitative and qualitative study in data type, and a field study in procedure, in which questionnaire ...  Read More

1. An Ant-Colony Optimization Clustering Model for Cellular Automata Routing in Wireless Sensor Networks

Aref Safari

Volume 12, Issue 2 , Autumn 2020, , Pages 139-147

  High efficient routing is an important issue for the design of wireless sensor network (WSN) protocols to meet the severe hardware and resource constraints. This paper presents an inclusive evolutionary reinforcement method. The proposed approach is a combination of Cellular Automata (CA) and Ant Colony ...  Read More

2. Control Chart Recognition Patterns using Fuzzy Rule-Based System

Alireza Alinezhad; Ali Taherinezhad

Volume 12, Issue 2 , Autumn 2020, , Pages 149-160

  Control Chart Patterns (CCPs) recognition is one the most important concepts in control chart application. Relating the patterns exhibited on the control chart to assignable causes is an ambiguous and vague task especially when multiple patterns co-exist. In this study, a fuzzy rule-based system is developed ...  Read More

Numerical Analysis
3. Meshless RBF Method for Linear and Nonlinear Sobolev Equations

Mehran Nemati; Mahmoud Shafiee; Hamideh Ebrahimi

Volume 12, Issue 2 , Autumn 2020, , Pages 161-174

  Radial Basis Functions are considered as important tools for scattered data interpolation. Collocation procedure is a powerful technique in meshless methods which is developed on the assumption of radial basis functions to solve partial differential equations in high dimensional domains having complex ...  Read More

Data Envelopment Analysis
4. Efficiency Evaluation of Railway Freight Stations by Using DEA Approach

Davoud Haghighi; Reza Babazadeh

Volume 12, Issue 2 , Autumn 2020, , Pages 175-185

  Railway freight stations roles as points in which traffic processes can be merged and diverged are of paramount importance. Numerous activities such as train formation, alighting and interchanging, technical checks are also done at these points. Due to the great importance of using railway infrastructures ...  Read More

Data Envelopment Analysis
5. Trust optimization in the single web services using a neuro‌-fuzzy system

baharak shakeri aski; Abolfazl Toroghi Haghighat; Mehran Mohsenzadeh

Volume 12, Issue 2 , Autumn 2020, , Pages 187-201

  Due to improvement of Internet, employing web services is developed. By utilizing web services, distributed applications can exchange information. Trust is a main criterion to choose the proper web service as web services selection is a main issue which is still absorbing researchers to conduct research ...  Read More

Islamic Azad University, Rasht Branch

Journal News

The Editorial board are happy to inform researchers and scientists that "Iranian Journal of optimization" start working again after a period of time.