Research Articles Optimization
Application of Covariance Matrix Adaptation-Evolution Strategy to Optimal Portfolio

S. Amir Ghoreishi; Hamid Khaloozadeh

Volume 2, Issue 2 , April 2019, Pages 81-90

https://doi.org/10.22111/ieco.2018.25860.1058

Abstract
  Capital portfolio management is considered an important issue in the field of economics and its main subject is about the scientific management of combination choice of assets that meet the specific investment objectives. Maximizing returns and minimizing asset risk are the most important goals in the ...  Read More

Research Articles Control
LMI-based Congestion Control Algorithms for a Delayed Network

Shoorangiz Shams shamsabad Farahani; Siavash Fakhimi Derakhshan

Volume 2, Issue 2 , April 2019, Pages 91-98

https://doi.org/10.22111/ieco.2018.24948.1038

Abstract
  In this paper buffer dynamic modeling for wireless sensor networks (WSNs) as a highly nonlinear system is accomplished in discrete time and the overall model is gained by blending subsystems obtained based on delay. Based on queue utilization and channel estimation algorithm, congestion is detected and ...  Read More

Research Articles Optimization
OSA: Orientation Search Algorithm

Mohammad Dehghani; Zeinab Montazeri; Om Parkash Malik; Ali Ehsanifar; Ali Dehghani

Volume 2, Issue 2 , April 2019, Pages 99-112

https://doi.org/10.22111/ieco.2018.26308.1072

Abstract
  Random based inventive algorithms are being widely used for optimization. An important category of these algorithms comes from the idea of physical processes or the behavior of beings. A new method for achieving quasi-optimal solutions related to optimization problems in various sciences is proposed ...  Read More

Research Articles Optimization
Double-Objective Optimization Based on Movement Dynamics of Charged Particles

Vahab Nekoukar

Volume 2, Issue 2 , April 2019, Pages 113-126

https://doi.org/10.22111/ieco.2018.26868.1087

Abstract
  Double-objective optimization is a wide class of multi-objective optimization problems in different scientific and industrial applications. This paper proposes a method for the problem of constrained double-objective optimization that is called gravitational charged particles optimization (GChPO). The ...  Read More

Research Articles Industrial Electronics
Sliding Mode Control of LLC Resonant DC-DC Converter for Wide output voltage Range in Battery Charging Applications

asghar taheri; Nader Asgari

Volume 2, Issue 2 , April 2019, Pages 127-136

https://doi.org/10.22111/ieco.2018.27333.1096

Abstract
  In this paper, a sliding mode control of LLC resonant dc-dc converter in low voltage and high current application is presented. The proposed controller operates at two fixed switching frequencies to the battery charger of electric vehicles. In resonant converter, because of the soft switching process, ...  Read More

Research Articles Industrial Electronics
Efficiency improvement and inrush current reduction in a non-isolated DC-DC converter

Saeid Moosavi

Volume 2, Issue 2 , April 2019, Pages 137-144

https://doi.org/10.22111/ieco.2018.25890.1059

Abstract
  DC–DC boost converters are unable to provide high step-up voltage gains due to the effect of power switches, rectifier diodes, and the equivalent series resistance of inductors and capacitors. A high step-up DC-DC converter based on the modified SEPIC converter is presented in this paper. Step ...  Read More

Research Articles Power systems
Microgrid frequency control using the virtual inertia and ANFIS-based Controller

Akbar Karimipouya; Shahram Karimi; Hamdi Abdi

Volume 2, Issue 2 , April 2019, Pages 145-154

https://doi.org/10.22111/ieco.2018.26293.1071

Abstract
  the main challenge in associate islanded Micro grid (MG) is the frequency stability due to the inherent low-inertia feature of distributed energy resources. That is why, energy storage devices, are utilized in MGs as the promising sources for grid short-term frequency regulation. Though energy storage ...  Read More

Research Articles Control
Kalman Filter-Smoothed Random Walk Based Centralized Controller for Multi-Input Multi-Output Processes

Saeed Tavakoli; Hamid Fasih; Jafar Sadeghi; Hamed Torabi

Volume 2, Issue 2 , April 2019, Pages 155-166

https://doi.org/10.22111/ieco.2018.26166.1067

Abstract
  In this paper, a novel centralized controller is presented to control multi-input multi-output industrial processes with heavy interactions and significant time-delays. The system model equations are represented in a non-minimal stochastic state-space form. Also, the state and measurement equations respectively ...  Read More