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

Articles in Press, Accepted Manuscript, Available Online from 16 January 2021

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

Articles in Press, Accepted Manuscript, Available Online from 16 January 2021

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

Articles in Press, Accepted Manuscript, Available Online from 31 January 2021

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

Articles in Press, Accepted Manuscript, Available Online from 30 January 2021

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 Recommender Systems
5. Hybrid Method of Recommender System to Decrement Cold Start and Sparse Data Issues

K. Vahidy Rodpysh; S. J. Mirabedini; T. Banirostam

Articles in Press, Accepted Manuscript, Available Online from 01 February 2021

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

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

M. Tolou Askari

Articles in Press, Accepted Manuscript, Available Online from 03 February 2021

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

A. Zakipour; N. Ghaffari; M. Salimi

Articles in Press, Accepted Manuscript, Available Online from 03 February 2021

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