Volume 17, Issue 1 (March 2021)  

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Abstract (2229 Views) | Full-Text (PDF) (855 Downloads)   |   Highlights
  • A noise reduction method in CT images has been proposed. Its algorithm performs a local noise assessment by means of separate reconstructions of two non-intersecting subsets of the set of projections of a given image.
  • Shearlet systems have been opted in order to obtain such statistical assessment because of their highly directional presentation together with optimal sparse approximations of anisotropic information and rapid numerical realization.
  • The change rate criterion for the Shannon entropy is used to determine the soft threshold mask for processing the high-frequency coefficients of the averaged image obtained from the two input reconstructions.
  • The comparison between the proposed method and the techniques using certain threshold constants shows the advantage of the former in terms of both quantitative measures and visualization quality.

Abstract (2690 Views) | Full-Text (PDF) (1848 Downloads)   |   Highlights
  • Investigating the effect of Miniaturized Inertia Generator (MIG) geometric parameters on the efficiency and energy.
  • Design optimization using response surface methodology (RSM).
  • A survey and depiction of the relationship between the maximum produced voltage and magnetic flux.
  • Designing a shear plate as a safety mechanism for MIG activation under the specific acceleration.
  • Studying the effect of initial acceleration on the produced quantities such as voltage, power, and energy.

Abstract (1945 Views) | Full-Text (PDF) (994 Downloads)   |   Highlights
  • The paper offers a new point of view to this subject by an analytical method based on the field analysis.
  • The paper presents new analytical expressions to approximate the airgap flux density and the torque of induction motor under voltage fluctuation conditions.
  • The analytical approach gives insight into the stator, rotor, and airgap field distributions, slot and MMF space harmonics, torque components of induction motors under voltage fluctuation conditions.

Abstract (2633 Views) | Full-Text (PDF) (968 Downloads)   |   Highlights
  • The industrial process consumes quite a huge amount of energy.
  • The cost of energy consumption is closely behind the cost of raw materials in the determination of the cost of production.
  • The use of programmable logic controller ladder diagram with the Fuzzy logic controller is successfully implemented to effect energy saving in the process industry.
  • There is a noticeable and significant improvement in energy and cost saving with the implementation of the approach

Abstract (1933 Views) | Full-Text (PDF) (762 Downloads)   |   Highlights
  • The impedance trajectory and interferes with the OOS relay in the presence of STATCOM.
  • Online estimation of Thevenin equivalent based on time-variant system identification through recursive least square.
  • Proposed a modified approach based on Thevenin equivalent to correct the impedance deviation caused by the STATCOM.

Abstract (2682 Views) | Full-Text (PDF) (1148 Downloads)   |   Highlights
  • A Markov model is proposed for the impact of human error modeling on failure rate of the protection system.
  • The optimum time interval of routine test of protection system is determined.
  • The proposed Markov model is applied to the protection system of power transformers.
  • Results show that the human error rate has a significant impact on the increase of failure rate and decrease of the optimum time interval of routine test of the protection system.

Abstract (2089 Views) | Full-Text (PDF) (893 Downloads)   |   Highlights
  • Introducing multi-robot simultaneous localization and mapping (MR-SLAM) system is implemented within a dynamic environment.
  • Using a probabilistic approach based on EKF is proposed to detect moving landmarks and consequently improve the performance of SLAM in dynamic environments.
  • Introducing the expected landmark area (ELA).

Abstract (2527 Views) | Full-Text (PDF) (947 Downloads)   |   Highlights
  • Single BU replaces Series of processing elements in the pipeline architecture of the FFT processor.
  • The design has less area consumption.
  • Suitable for DIF as well as DIT computation.
  • Small independent computation.

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© 2022 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.