Communication
Robust Beamforming for Ultrasonic Imaging using Wavelet-based Thresholding and Coherence Weighting

Mozhgan Ehsani; Mehdi Bekrani; Solyman Garousi

Volume 7, Issue 4 , December 2024, , Pages 339-350

https://doi.org/10.22111/ieco.2024.48650.1564

Abstract
  The delay-and-sum (DS) beamforming and delay-weight-and-sum (DWS) beamforming are primary methods in ultrasonic imaging with phased arrays. Total focusing method (TFM) and Minimum Variance (MV) based adaptive beamforming are well-known methods within DS and DWS beamforming, respectively. The MV-based ...  Read More

Power systems
An Adaptive Control Method Based on Interval Fuzzy Sliding Mode for Direct Matrix Converters

Mehdi Bekrani; Mojtaba Heydari; Seyedeh Tahereh Behrooz

Volume 3, Issue 2 , May 2020, , Pages 159-171

https://doi.org/10.22111/ieco.2019.30815.1191

Abstract
  In this paper, a new adaptive control method is proposed for direct matrix converters. The proposed method uses interval type-2 fuzzy logic integrated with sliding mode control. Employing the sliding mode control in matrix converters leads to an efficient choice of switching combinations and a reliable ...  Read More