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Prof. Ahmed G. Radwan

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Monthly Archives: December 2021

1-s2.0-S2090447921000204-gr5

Optimal fractional-order PI with DC-DC converter and PV system

This paper presents a design and analysis for the PV system with a DC-DC boost converter controlled by the Fractional Order PI controller (FOPI)

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Low-voltage puzzle-like fractal microelectromechanial system variable capacitor suppressing pull-in

This Letter introduces an electrostatically actuated fractal MEMS variable capacitor that, by utilising the substrate, extends the tuning range (TR) beyond the theoretical limit of 1

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Fractional order butterworth filter: Active and passive realizations

This paper presents a general procedure to obtain Butterworth filter specifications in the fractional-order domain where an infinite number of relationships could be obtained due to the extra independent fractional-order parameters which increase the filter degrees-of-freedom

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Low-voltage commercial super-capacitor response to periodic linear-with-time current excitation: A case study

The response of a commercial super-capacitor to an applied periodic current excitation in the form of a triangular waveform is investigated in this study

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1-D digitally-controlled multiscroll chaos generator

A digitally-controlled MOS-transistor-based 1-D multiscroll chaos generator is proposed

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Capacitive behavior and stored energy in supercapacitors at power line frequencies

Supercapacitors are commonly viewed and mainly employed as dc electrical energy storage devices

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Power and energy analysis of fractional-order electrical energy storage devices

Characterizing and modeling electrical energy storage devices is essential for their proper integration in larger systems

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RF MEMS fractal capacitors with high self-resonant frequencies

This letter demonstrates RF microelectromechanical systems (MEMS) fractal capacitors possessing the highest reported self-resonant frequencies (SRFs) in PolyMUMPS to date

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Fractional calculus definitions, approximations, and engineering applications

The basic idea behind fractional calculus is that it considers derivatives and integrals of non-integer orders giving extra degrees of freedom and tuning knobs for modeling complex and memory dependent systems with compact descriptions

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On The Optimization of Fractional Order Low-Pass Filters

This paper presents three different optimization cases for normalized fractional order low-pass filters (LPFs) with numerical, circuit and experimental results

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RECENT PUBLICATIONS
  • Valorization of Agricultural and Marine Waste for Fabrication of Bio-Adsorbent Sheets
  • MPPT for a Partially Shaded PV System Using Accelerated Particle Swarms
  • On Fractional-order Capacitive Wireless Power Transfer System
  • Time-domain Li-ion Battery Modeling under Staircase Charging and Discharging
  • Progressive Multi-Secret Sharing of Color Images Using Lorenz Chaotic System
RESEARCH TOPICS

Bio-impedance for Food Quality Biomedical and Robotic Engineering Biomedical Engineering Chaotic & Coding Systems with Applications Chaotic Systems and Applications Design and Applications of Mem-elements Fractional-order systems Modeling and Applications of New Electrical Elements and Recent Technology Modeling of Supercapacitors and Energy Storage Elements Wastewater Treatments

AHMED RADWAN

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  • NU Main Campus: 26 July Corridor, Sheikh Zayed City
  • agradwan@nu.edu.eg
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