Original Research Paper Nonlinear System
1. Nonlinear Analysis of Colpitts Oscillator using on Differential Transform Method

A.R. Ghomi Taheri; F. Setoudeh; M. B. Tavakoli

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 127-142

http://dx.doi.org/10.22061/jecei.2020.7543.402

Abstract
  Background and Objectives: The Differential transform method (DTM) is used in the analysis of ordinary, partial, and high-order differential equations. Recently, the DTM is used in the nonlinear analysis of physical nonlinear dynamic systems. Methods: The DTM method is used to analyze and analytically ...  Read More

Original Research Paper Control
2. Fault Diagnosis of a Permanent Magnet Synchronous Generator Wind Turbine

S. Khodakaramzadeh; M. Ayati; M. R. Haeri Yazdi

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 143-152

http://dx.doi.org/10.22061/jecei.2020.7424.408

Abstract
  Background and Objectives: Designing a terminal sliding mode observer (TSMO) in order to estimate the potential faults in a wind turbine with a doubly fed induction generator (DFIG) has been studied in previous research works. In this paper, a method for fault detection of a permanent magnet synchronous ...  Read More

Original Research Paper Analogue Integrated Circuits
3. Design of a High-Speed and Low Power CMOS Comparator for A/D Converters

F. Shakibaee; A. Bijari; S.H. Zahiri

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 153-160

http://dx.doi.org/10.22061/jecei.2021.7602.409

Abstract
  Background and Objectives: Comparators play a critical role in the analog to digital converters (ADCs) and digital to analog converters (DACs). So, different structures have been proposed to improve their performance. Power, delay, offset, and noise are the important factors that have significantly affect ...  Read More

Original Research Paper Microphone Array Processing
4. An Approach for Solving Signal Cancellation Problem in Spherical Microphone Array

M. Kalantari

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 161-172

http://dx.doi.org/10.22061/jecei.2021.7640.415

Abstract
  Background and Objectives: One major problem in the minimum power distortionless response (MPDR) beamformer is the signal cancellation problem, i.e., the desired signal is canceled by the reflected signal, even though the distortionless response constraint is satisfied. Solving this problem is the objective ...  Read More

Original Research Paper Power Systems
5. Influence of Phase-Shifting Transformers (PSTs) on the Distance Protection of Transmission Lines and Improve the Performance of Distance Relay

H. Sahraei; M. Tolou Askari

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 173-184

http://dx.doi.org/10.22061/jecei.2021.7549.403

Abstract
  Background and Objectives: With the ever-increasing growth of electric loads, the need for generating electric power grows correspondingly. By considering the limitations of power generation, utilizing novel technologies has gained persistent momentum, one of which is deploying Phase-Shifting Transformers ...  Read More

Original Research Paper Photonics
6. Realization of Ultra-compact All-optical Universal NOR Gate on Photonic Crystal Platform

F. Parandin

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 185-192

http://dx.doi.org/10.22061/jecei.2021.7637.414

Abstract
  Background and Objectives: Universal NOR gate is one of the most important gates in digital design. The all-optical NOR gate can be designed using photonic crystals. These types of gates have a small size and can be integrated. Methods: In this paper, an optical NOR gate is designed based on 2D photonic ...  Read More

Original Research Paper Image Processing
7. Real-time Lane Detection Based on Image Edge Feature and Hough Transform

A. Fallah; A. Soliemani; H. Khosravi

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 193-202

http://dx.doi.org/10.22061/jecei.2021.7659.418

Abstract
  Background and Objectives: Lane detection systems are an important part of safe and secure driving by alerting the driver in the event of deviations from the main lane. Lane detection can also save the lifes of car occupants if they deviate from the road due to driver distraction. Methods: In this paper, ...  Read More

Original Research Paper Object Tracking
8. A Variational Level Set Approach to Multiphase Multi-Object Tracking in Camera Network Base on Deep Features

E. Pazouki; M. Rahmati

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 203-214

http://dx.doi.org/10.22061/jecei.2021.7649.417

Abstract
  Background and Objectives: Object tracking in video streams is one of the issues in machine vision that has many applications. Depending on the type of the object, the number of objects and other inputs used in tracking, object tracking is divided into several different categories. Multi-object tracking ...  Read More

Original Research Paper Nonlinear Control
9. State Space Modeling and Sliding Mode Current Control of the Grid Connected Multi-Level Flying Capacitor Inverters

N. Ghaffari; A. Zakipour; M. Salimi

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 215-228

http://dx.doi.org/10.22061/jecei.2021.7626.412

Abstract
  Background and Objectives: In this paper, a novel approach for regulation of the output current in the grid-connected three-level flying capacitor inverter is presented by using the sliding mode (SM) method. In the proposed method, it is possible to control the active and reactive components of the inverter ...  Read More

Original Research Paper Geographic Information System
10. The Feasibility of Machine-learning Methods to Extract the Surface Evaporation Quantity using Satellite Imagery

E. Norouzi; S. Behzadi

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 229-238

http://dx.doi.org/10.22061/jecei.2021.7563.406

Abstract
  Background and Objectives: Climate phenomena such as quantity of surface evaporation are affected by many environmental factors and parameters, which makes modeling and data mining difficult. On the other hand, the estimation of surface evaporation for a target station can be difficult as a result of ...  Read More

Original Research Paper Pulsed Power
11. A High Voltage Isolated Pulse Generator using Magnetic Pulse Compression and Resonant Charging Techniques for Dielectric Barrier Discharge Applications

A. Nejadmalayeri; H. Bahrami; َA. Bali Lashak; I. Soltani

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 239-248

http://dx.doi.org/10.22061/jecei.2021.7519.400

Abstract
  Background and Objectives: Dielectric Barrier discharge (DBD) is a suitable method to generating Non-thermal plasma at atmospheric pressure, which utilizes Pulsed power supplies as exciters. Increasing pulse voltage range and frequency and compactness are important issues that should be taking into consideration. ...  Read More

Original Research Paper Recommender Systems
12. Hybrid Method of Recommender System to Decrement Cold Start and Sparse Data Issues

K. Vahidy Rodpysh; Seyed Javad Mirabedini; T. Banirostam

Volume 9, Issue 2 , Summer and Autumn 2021, Pages 249-263

http://dx.doi.org/10.22061/jecei.2021.7610.410

Abstract
  Background and Objectives: The main purpose of the recommender system is to estimate the user's desire and provide a list of items predicted using the appropriate information. Recommender systems offering suggestions items to users face the two challenges of cold start and sparse data. Methods: This ...  Read More