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Experimental validation of double-fed induction generator in oscillating water column using circulatory system-based optimization

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Clean Energy 2024年第2期8卷 127-143页

作者： Basem E.Elnaghi Ahmed m.Ismaiel fathy El Sayed Abdel-Kader Reham H.mohammed m.N.Abelwhab Electrical Power and machine Department Suez Canal UniversityIsmailiaEgypt Electrical Power and machine Department Menoufia UniversityMenoufiaEgypt Computer and Control Department Suez Canal UniversityIsmailiaEgypt

This paper validates the optimal operation for a grid-connected double-fed induction generator(DFIG)in an oscillating water column power plant(OWCPP).This study presents a novel optimization technique called the circulatory system-based optimization(CSBO)approach to develop six adaptive fuzzy logic controllers(AFLCs)with 30 parameters and compare them to chaotic-billiards optimization(C-BO)and genetic algorithm(GA).The proposed controller is also compared with a proportional-integral differential(PID)controller based on a self-adaptive global-best harmony search(SGHS).CSBO-based AFLCs are fully investigated under different scenarios and experimented with using a real-time interface *** results of using CSBO-AFLCs revealed a fast time response,fast convergence,less overshoot and minimal error compared with those achieved with C-BO-AFLC,SGHS-PID and GA-AFLC during different case *** CSBO-based AFLCs ensure maximum power from the DFIG in an OWCPP and enhance dynamic response with very low *** results show that the CSBO shows better power tracking by 25%as compared with C-BO,by 45%when compared with the GA and by 56%when compared with ***,the integral absolute errors of six controllers are investigated to demonstrate the feasibility of *** root mean square of the errors of six controllers using CSBO is improved by 68.27%when compared with GA,by 22.57%when compared with C-BO and by 38.42%when compared with *** indicators demonstrate the feasibility of CSBO when compared with other algorithms with the same OWCPP.

关键词： circulatory system-based optimization approach adaptive fuzzy logic controller grid-tied oscillating water column power plant maximum power point tracking

A new technique of monsplasty as an adjunctive procedure in cases of abdominoplasty:A prospective clinical trial

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Chinese Journal of Plastic and Reconstructive Surgery 2024年第3期6卷 124-129页

作者： Laila Ahmed Aboul Nasr Sherief Zamer Ahmed fathy Elsayed mohamed Hatem Elsahar Department of Plastic Surgery Faculty of Medicine Kasr Al-AinyCairo UniversityCairo11562Egypt

Background:No standard monsplasty technique has existed until *** various monsplasty methods have been described,they exhibit high complication rates with sparse postoperative *** that used pubic suspension techniques did not describe exact anatomical landmarks for the mons *** study aimed to improve the aesthetic and functional appearance of the pubic region with long-term results for all grades of pubic ptosis or bulging with abdominoplasty and provide exact anatomical points to anchor the mons to the rectus ***:This non-randomized prospective clinical trial included 30 patients with various degrees of abdominal wall laxity between December 2017 and September *** surgical procedure was performed for female patients with pendulous abdomen,pubic ptosis or bulging,body mass index≤35 kg/m^(2),and age 18–60 *** patients were followed for up to one year;patient satisfaction was assessed before and after surgery regarding aesthetic results and impact on outfits,hygiene,and sexual ***:The marginal homogeneity test revealed a statistically significant patient satisfaction rate regarding outfits,sexual function,hygiene,and *** postoperative complications,seroma(one case)was managed by aspiration,and one case of wound dehiscence was managed conservatively with ***:This study recommends a quick and reproducible monsplasty technique with a low complication rate,a technique that helps determine specific anatomical landmarks for anchoring the mons to the rectus *** this technique with abdominal contouring is advisable for optimal aesthetic results and maintained lymphatic drainage in the pubic region.

关键词： Abdominoplasty mons ptosis Pubic suspension Skin redundancy

Effects of variable properties on mHD heat and mass transfer flow near a stagnation point towards a stretching sheet in a porous medium with thermal radiation

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Chinese Physics B 2012年第5期21卷 353-363页

作者： A.m.Salem Rania fathy Department of Basic Science Faculty of Computer&InformaticsSuez Canal University Department of mathematics Faculty of ScienceZagazig University

The effect of variable viscosity and thermal conductivity on steady magnetohydrodynamic（mHD） heat and mass transfer flow of viscous and incompressible fluid near a stagnation point towards a permeable stretching sheet embedded in a porous medium are presented,taking into account thermal radiation and internal heat genberation/*** stretching velocity and the ambient fluid velocity are assumed to vary linearly with the distance from the stagnation *** Rosseland approximation is used to describe the radiative heat flux in the energy *** governing fundamental equations are first transformed into a system of ordinary differential equations using a scaling group of transformations and are solved numerically by using the fourth-order Rung-Kutta method with the shooting technique.A comparison with previously published work has been carried out and the results are found to be in good *** results are analyzed for the effect of different physical parameters,such as the variable viscosity and thermal conductivity,the ratio of free stream velocity to stretching velocity,the magnetic field,the porosity,the radiation and suction/injection on the flow,and the heat and mass transfer *** results indicate that the inclusion of variable viscosity and thermal conductivity into the fluids of light and medium molecular weight is able to change the boundary-layer behavior for all values of the velocity ratio parameter λ except for λ = *** addition,the imposition of fluid suction increases both the rate of heat and mass transfer,whereas fluid injection shows the opposite effect.

关键词： variable viscosity variable thermal conductivity stagnation point

Hydromagnetic flow of a Cu water nanofluid past a moving wedge with viscous dissipation

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Chinese Physics B 2014年第4期23卷 365-372页

作者： A.m.Salem Galal Ismail Rania fathy Department of mathematics Faculty of Science and Arts Qassim University Department of Basic Science Faculty of Computers and Informatics Suez Canal University Department of mathematics Faculty of Science Zagazig University

A numerical study is performed to investigate the flow and heat transfer at the surface of a permeable wedge immersed in a copper （Cu）-water-based nanofluid in the presence of magnetic field and viscous dissipation using a nanofluid model proposed by Tiwari and Das （Tiwari I K and Das m K 2007 Int. J. Heatmass Transfer 50 2002）. A similarity solution for the transformed governing equation is obtained, and those equations are solved by employing a numerical shooting technique with a fourth-order Runge-Kutta integration scheme. A comparison with previously published work is carried out and shows that they are in good agreement with each other. The effects of velocity ratio parameter ~, solid volume fraction tp, magnetic field m, viscous dissipation Ec, and suction parameter Fw on the fluid flow and heat transfer characteristics are discussed. The unique and dual solutions for self-similar equations of the flow and heat transfer are analyzed numerically. moreover, the range of the velocity ratio parameter for which the solution exists increases in the presence of magnetic field and suction parameter.

关键词： nanofluid dual solution magnetic field viscous dissipation

moringa oleifera Lam. leaf extract mitigates carbon tetrachloride-mediated hepatic inflammation and apoptosis via targeting oxidative stress and toll-like receptor 4/nuclear factor kappa B pathway in mice

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Food Science and Human Wellness 2021年第3期10卷 383-391页

作者： Samah m.fathy mohammed S.m.mohammed Zoology Department Faculty of ScienceFayoum UniversityFayoumEgypt

Carbon tetrachloride(CCl4)is a hepatotoxin that triggers liver *** study aimed to evaluate the protective effect of phytochemicals detected in moringa oleifera *** extract(mOLE)on CCl4-induced hepatotoxicity in ***,total phenolics,and total fl avonoids were detected in *** markedly decreased the elevation of serum alanine aminotransferase(ALT)and aspartate aminotransferase(AST)in consistence with the ameliorating effect on CCl4-induced histopathological ***,mOLE significantly alleviated the decrease in the antioxidant defense mechanism induced by *** suppressing effect of mOLE on the boosted inflammatory pathway triggered by CCl4 was detected by measuring the protein levels of nuclear factor kappa-light-chain-enhancer of activated B-cells(NF-κB-p65),toll-like receptor 4(TLR4),tumor necrosis factor-α(TNF-α),interleukin(IL)-6,IL-1β,and IL-8 as well as the relative expressions of nuclear factor kappa B(NF-κB),TNF-α,IL-1β,and TLR4 *** and genotoxicity induced by CCl4 were signifi cantly alleviated by *** co-administration modulated TLR4/NF-κB pathway as presented by the suppressed gene expression of TLR4 and NF-κB as well as by the reduced protein expression of TLR4 and NF-κ*** conclusion,mOLE has a multifarious protective role against hepatotoxicity through control of oxidative stress and modulation of TLR4/NF-κB.

关键词： CCl4 Infl ammation moringa oleifera Lam. Oxidative stress TLR4/NF-κB

Numerical Analysis of Laterally Loaded Long Piles in Cohesionless Soil

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Computers, materials & Continua 2022年第5期71卷 2175-2190页

作者： Ayman Abd-Elhamed mohamed fathy Khaled m.Abdelgaber Physics and Engineering mathematics Department Faculty of Engineering-MattariaHelwan UniversityCairo11718Egypt Faculty of Engineering King Salman International UniversitySouth SinaiRas SedrEgypt Basic and Applied Science Department College of Engineering and TechnologyArab Academy for ScienceTechnology and Maritime TransportCairo11799Egypt

The capability of piles to withstand horizontal loads is a major design *** current research work aims to investigate numerically the responses of laterally loaded piles at working load employing the concept of a beam-on-Winkler-foundation *** governing differential equation for a laterally loaded pile on elastic subgrade is *** on LegendreGalerkin method and Runge-Kutta formulas of order four and five,the flexural equation of long piles embedded in homogeneous sandy soils with modulus of subgrade reaction linearly variable with depth is solved for both free-and fixed-headed ***,as one of the world’s leading computational software,was employed for the implementation of *** proposed numerical techniques provide the responses for the entire pile length under the applied lateral *** utilized numerical approaches are validated against experimental and analytical results of previously published works showing a more accurate estimation of the response of laterally loaded ***,the proposed approaches can maintain both mathematical simplicity and comparable accuracy with the experimental results.

关键词： Numerical solution laterally loaded pile cohesionless soil Legendre-Galerkin Runge-Kutta

On-chip parallel Fourier transform spectrometer for broadband selective infrared spectral sensing

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microsystems & Nanoengineering 2020年第1期6卷 1267-1275页

作者： Alaa fathy Yasser m.Sabry Sebastien Nazeer Tarik Bourouina Diaa A.Khalil Faculty of Engineering Ain-Shams University1 Elsarayat St.AbbassiaCairoEgypt Si-Ware Systems 3 Khalid Ibn Al-Waleed St.HeliopolisCairoEgypt UniversitéParis-Est ESYCOM EA 2552ESIEE Paris93162 Noisy-le-GrandFrance

Optical spectrometers enable contactless chemical ***,decreasing both their size and cost appears to be a prerequisite to their widespread ***-scale implementation of optical spectrometers still requires tackling two main ***,operation over a broad spectral range extending to the infrared is required to enable covering the molecular absorption spectrum of a broad variety of *** is addressed in our work with an micro-Electro mechanical Systems(mEmS)-based Fourier transform infrared spectrometer with an embedded movable micro-mirror on a silicon ***,fine spectral resolutionΔλis also required to facilitate screening over several chemicals.A fundamental limit states thatΔλis inversely proportional to the mirror motion range,which cannot exceed the chip *** boost the spectral resolution beyond this limit,we propose the concept of parallel(or multi-core)FTIR,where multiple interferometers provide complementary optical paths using the same actuator and within the same *** concept scalability is validated with 4 interferometers,leading to approximately 3 times better spectral *** the atmospheric contents of a greenhouse gas are monitored,the methane absorption bands are successfully measured and discriminated using the presented device.

关键词： interferometer spectral mirror

Highly efficient one-pot synthesis of dihydropyran heterocycles

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Chinese Chemical Letters 2014年第2期25卷 212-214页

作者： mohamed A.Ameen Sara m.motamed fathy F.Abdel-latif Chemistry Department.Faculty of Science El Minia University

Diammonium hydrogen phosphate and potassium carbonate-catalyzed one-pot synthesis of 1,4- phenylene-bis（2-amino-4H-pyran-3-carbonitrile and 2-amino-4-aryl-4H-pyran-3-carbonitrile deriva- tives has been achieved by a three-component cyclocondensation of aldehydes, malononitrile, and different nucleophiles in aqueous medium in high yields.

关键词： One pot synthesis Diammonium hydrogen phosphate Pyran Aqueous media

Origin and Petrogenetic Implications of Spessartine Garnet in Highly-Fractionated Granite from the Central Eastern Desert of Egypt

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Acta Geologica Sinica(English Edition) 2020年第3期94卷 763-776页

作者： mabrouk SAmI Theodoros NTAFLOS Haroun A.mOHAmED Esam S.FARAHAT Christoph HAUZENBERGER Nasser m.mAHDY Khaled m.ABDELFADIL Douaa fathy Geology Department Faculty of ScienceMinia UniversityEl-Minia 61519Egypt Department of Lithospheric Research University of ViennaAlthanstrasse 14A-1090 ViennaAustria Institute of mineralogy and Petrology Karl-Franzens UniversityGrazAustria Nuclear materials Authority P.O.530El-MaadiCairoEgypt Geology Department Faculty of ScienceSohag UniversityEgypt

A highly-fractionated garnet-bearing muscovite granite represents the marginal granitic facies of the Abu-Diab multiphase pluton in the Central Eastern Desert of Egypt. New electron microprobe analyses(EmPA) and laser ablation inductively coupled plasma mass spectrometry(LA-ICP-mS) data from garnets are reported, in order to constrain their origin and genesis. Garnet in the Abu-Diab host granite is euhedral to subhedral, generally homogeneous and, in rare cases, it shows weak zonation. The garnet contains appreciable amounts of mnO and FeO, with lesser amounts of mgO and CaO, yielding an end-member formula of Sps61–72Alm25–35Prp1–4Adr0–1. moreover, it is depleted in large ion lithophile elements(LILE) with lower values of Ba, Nb and Sr relative to the primitive mantle. Additionally, it contains high concentrations of HREE and Y and their REE pattern shows strong negative Eu anomalies. The garnet was crystallized under relatively low temperature(646°C–591°C) and pressure(mical features indicate that the garnet is magmatic in origin and is chemically similar to that from highly-fractionated A-type granite. It was probably formed at the expense of biotite in a highly-evolved mnO-rich magma and/or by hydroxyl complexing of mn during the ascending fluid phases.

关键词： spessartine garnet LA-ICP-mS A-type granite Abu-Diab Egypt