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MHD Boundar. Layer.Flow of a Power.Law Nanofluid Containing Gyr.tactic Micr.or.anisms Over.an Exponentially Str.tching Sur.ace

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Computer., Mater.als & Continua 2020年第2期62卷 525-549页

作者： Mohamed abd el-Aziz A.M.Aly Depar.ment of Mathematics Faculty of ScienceKing Khalid UniversityAbha61411Saudi Arabia Depar.ment of Mathematics Faculty of ScienceHelwan UniversityHelwan-Cairo11795Egypt Depar.ment of Mathematics Faculty of ScienceSouth Valley UniversityQena83523Egypt

This study focusses on the numer.cal investigations of boundar. layer.flow for.magnetohydr.dynamic(MHD)and a power.law nanofluid containing gyr.tactic micr.or.anisms on an exponentially str.tching sur.ace with zer. nanopar.icle mass flux and convective *** nonlinear.system of the gover.ing equations is tr.nsfor.ed and solved by r.nge-Kutta-Fehlber. *** impacts of the tr.nsver.e magnetic field,bioconvection par.meter.,Lewis number.nanofluid par.meter.,Pr.ndtl number.and power.law index on the velocity,temper.tur.,nanopar.icle volume fr.ction,density of motile micr.or.anism pr.files is *** addition,the impacts of these par.meter. on local skin-fr.ction coefficient,local Nusselt,local Sher.ood number. and local density number.of the motile micr.or.anisms ar. *** r.sults r.veal that the power.law index is consider.d an impor.ant factor.in this *** to neglecting the buoyancy for.e ter.,the bioconvection and nanofluid par.meter. have slight effects on the velocity *** r.sultant Lor.ntz for.e,fr.m incr.asing the magnetic field par.meter.tr. to decr.ase the velocity pr.files and incr.ase the r.scaled density of motile micr.or.anisms,temper.tur. and nanopar.icle volume fr.ction ***,an augmentation of power.law index dr.ps the r.duced local skin-fr.ction and r.duced Sher.ood number.while it incr.ases r.duced Nusselt number.and r.duced local density number.of motile micr.or.anisms.

关键词： Bioconvection gyr.tactic micr.or.anisms magnetohydr.dynamic nanofluid boundar. layer power.law

Entr.py Gener.tion for.Flow and Heat Tr.nsfer.of Sisko-Fluid Over.an Exponentially Str.tching Sur.ace

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Computer., Mater.als & Continua 2020年第1期62卷 37-59页

In the pr.sent study,the effects of the magnetic field on the entr.py gener.tion dur.ng fluid flow and heat tr.nsfer.of a Sisko-fluid over.an exponentially str.tching sur.ace ar. *** similar.ty tr.nsfor.ations ar. used to tr.nsfer.the gover.ing par.ial differ.ntial equations into a set of nonlinear.coupled or.inar. differ.ntial ***-Kutta-Fehlber. method is used to solve the gover.ing *** effects of magnetic field par.meter.local slip par.meter.,gener.lized Biot number.,Sisko fluid mater.al par.meter.Ecker. number.Ec,Pr.ndtl number.Pr.and Br.nkman number.Br.at two values of power.law index on the velocity,temper.tur.,local entr.py gener.tion number.N_(G) and Bejan number.Be ar. ***,the tabular.for.s for.local skin fr.ction coefficient and local Nusselt number.under.the effects of the physical par.meter. ar. *** cur.ent r.sults ar. helpful in checking the entr.py gener.tion for.*** is found that,an extr. magnetic field par.meter.makes higher.Lor.ntz for.e that suppr.sses the *** shear.thinning fluids(nr.tur. dominates and the velocity *** entr.py gener.tion number.is mor. for.lar.er.gener.lized Biot number.magnetic field par.meter.and Br.nkman *** local skin fr.ction coefficient incr.ases as magnetic field par.meter.and mater.al par.meter.ar. incr.ase and it decr.ases as local slip par.meter.*** local Nusselt number.decr.ases as magnetic field par.meter.local slip par.meter.and Ecker. number.ar. incr.ase,while it incr.ases as mater.al par.meter.gener.lized Biot number.and Pr.ndtl number.ar. incr.ase.

关键词： Boundar. layer entr.py gener.tion exponentially str.tching sur.ace magnetic field sisko-fluid

Fr.ctional Optimal Contr.l of Navier.Stokes Equations

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Computer., Mater.als & Continua 2020年第8期64卷 859-870页

作者： abd-Allah Hyder.M.el-Badawy King Khalid Univer.ity College of ScienceDepartment of MathematicsP.O.Box 900461413AbhaSaudi Arabia Depar.ment of Engineer.ng Mathematics and Physics Faculty of EngineeringAl-Azhar UniversityCairo11371Egypt Mathematics Depar.ment Al-Azhar UniversityCairoEgypt

In this paper.the non-stationar. incompr.ssible fluid flows gover.ed by the Navier.Stokes equations ar. studied in a bounded *** study focuses on the time-fr.ctional Navier.Stokes equations in the optimal contr.l subject,wher. the contr.l is distr.buted within the domain and the time-fr.ctional der.vative is pr.posed as r.emann-Liouville *** addition,the contr.l object is to minimize the quadr.tic cost *** using the Lax-Milgr.m lemma with the assistance of the fixed-point theor.m,we demonstr.te the existence and uniqueness of the weak solution to this ***,for.a quadr.tic cost functional subject to the time-fr.ctional Navier.Stokes equations,we pr.ve the existence and uniqueness of optimal ***,via the var.ational inequality upon intr.ducing the adjoint linear.zed system,some inequalities and identities ar. given to guar.ntee the fir.t-or.er.necessar. optimality conditions.A dir.ct consequence of the r.sults obtained her. is that when a→1,the obtained r.sults ar. valid for.the classical optimal contr.l of systems gover.ed by the Navier.Stokes equations.

关键词： Optimal contr.l lax-milgr.m lemma fixed point theor.m navier.stokes equations

Physio-biochemical and nutr.ent constituents of peanut plants under.bentazone her.icide for.br.ad-leaved weed contr.l and water.r.gimes in dr. land ar.as

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Jour.al of Ar.d Land 2020年第4期12卷 630-639页

作者： Hani S SAUDY Ibr.him M el–METWALLY Goma A abd el–SAMAD Agr.nomy Depar.ment Faculty of AgricultureAin Shams University68–Hadayek Shoubra 11241CairoEgypt Botany Depar.ments National Research CentreEl–Behos St.Dokki 12622CairoEgypt

The abundance of br.ad-leaved weeds in peanut fields r.pr.sents the handicap in weed management pr.gr.ms, since limited specific her.icides can be r.commended to contr.l them. Mor.over. the physio-biochemical constituents and nutr.tional status in peanut plants as affected by available her.icides, i.e., bentazone under.water.str.ss conditions ar. not well known. Ther.for., field tr.als wer. conducted dur.ng the gr.wing seasons in 2016 and 2017 to investigate the inter.ctional impact of ir.igation levels(I_(50), I_(75) and I_(100), r.pr.senting ir.igation by 50%, 75% and 100% of cr.p evapotr.nspir.tion, r.spectively) and weed contr.l pr.ctices(bentazone, bentazone+hoeing once, hoeing twice and weedy check as contr.l) on dominant br.ad-leaved weeds as well as peanut physiological and agr.nomic tr.its. r.sult indicated that the efficiency of weed contr.l for.each weeded tr.atment under.I_(50) significantly equaled with its counter.ar. under.I_(75) or.I_(100). Bentazone+hoeing once diminished weed biomass by 89.3% and enhanced chlor.phyll content of peanut plants by 51.2%. Bentazone r.latively caused a r.duction in car.tenoides. Hoeing twice and bentazone+hoeing once under.I_(100) in both gr.wing seasons as well as hoeing twice under.I_(75) in 2017 wer. the super.or.combinations for.boosting pod yield of peanut plants. Tr.atment of bentazone+hoeing once and I_(75) r.cor.ed the lowest r.duction in N utilization per.entage and the highest incr.ase in potassium utilization per.entage of peanut plants. eliminating weeds enhanced water.use efficiency by 37.8%, 49.6% and 34.7% under.I_(50), I_(75) and I_(100), r.spectively. In conclusion, peanut seems to be toler.nt to bentazone at moder.te water.supply, thus it can be safely used in contr.lling the associated br.ad-leaved weeds.

关键词： biochemical tr.its dr.ught nutr.tional status peanut pr.ductivity weed gr.wth

Effective damping of local low fr.quency oscillations in power.systems integr.ted with bulk PV gener.tion

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Pr.tection and Contr.l of Moder. Power.Systems 2021年第1期6卷 512-524页

作者： Ahmed Hesham abd el-Kar.em Mohamed abd elhameed Mahmoud M.elkholy Oper.tion Engineer.at New Capital Power.Plant New Capital CityEgypt electr.cal Power.and Machines Depar.ment Faculty of EngineeringZagazig UniversityZagazigEgypt

High penetr.tion of r.newable sour.es into conventional power.systems r.sults in r.duction of system iner.ia and noticeable low-fr.quency oscillations (LFOs) in the r.tor.speed of synchr.nous gener.tor.. In this paper. we pr.pose effective damping of LFOs by incor.or.ting a supplementar. damping contr.ller.with a photovoltaic (PV) gener.ting station, wher. the par.meter. of this contr.ller.ar. coor.inated optimally with those of a power.system stabilizer.(PSS). The pr.posed method is applied to damp local electr.mechanical modes by studying a system compr.sing a synchr.nous gener.tor.and a PV station connected to an infinite bus. The PV station is modeled following the instr.ctions of the Wester. electr.city Coor.inating Council. The pr.blem is modeled as an optimization pr.blem, wher. the damping r.tio of the electr.mechanical modes is designed as the objective function. Constr.ints including upper.and lower.limits of decision par.meter. and damping r.tio of other.modes ar. consider.d by imposing penalties on the objective function. Differ.nt optimization algor.thms ar. used to pur.ue the optimal design, such as political, impr.ved gr.y wolves and equilibr.um optimizer.. The r.sults validate the effectiveness of the pr.posed contr.ller.with PSS in damping local modes of oscillations.

关键词： Low fr.quency oscillations Damping contr.ller PV WECC

r.sponse of seed yield and fatty acid compositions for.some sunflower.genotypes to plant spacing and nitr.gen fer.ilization

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Infor.ation Pr.cessing in Agr.cultur. 2017年第3期4卷 241-252页

作者： Mohamed Ali abd el-Satar.Asmaa abd-el-Halime Ahmed Tamer.Hassan Ali Hassan Oil Cr.ps r.sear.h Depar.ment Field Crops Research InstituteAgricultural Research Center9 El-Gamaa St.GizaEgypt

A field exper.ment was conducted at the exper.ment Far. of Kafr.el-Hamam r.sear.h Station,Zagazig,Shar.ia Gover.or.te,Agr.cultur.l r.sear.h Center.Egypt dur.ng the two successive summer.seasons of 2015 and 2016 to achieve the highest yield and good oil quality of thr.e tested sunflower.*** both seasons,the exper.ment was conducted using the split split plot design in r.ndomized complete block design with thr.e r.plicates ar.angement keeping plant spaces(15,20 and 25 cm apar. between hills)in main plots,nitr.gen fer.ilization levels(15,30 and 45 N fad.^-1)in sub plots and sunflower.genotypes(Giza 102,Sakha 53 and pr.mising line of L120)in sub sub *** and quality tr.its wer. significantly influenced by plant spaces,nitr.gen fer.ilization levels and genotypes as well as inter.ctions in both seasons and their.combined *** wider.plant spacing of 25 cm seems to be a good compr.mise between the highest seed yield fad.^-1 and good acid composition of *** incr.asing of nitr.gen fer.ilization level had a positive r.flected on yield and desir.ble acid composition of *** 53 was r.nked in the fir.t or.er.in stem diameter.head diameter.100-seed weight,seed weight plant^-1,flower.d late and hence seed yield fad.^-1 as well as seed oil content wher.as,Giza 102 char.cter.zed with its contained the highest pr.por.ion of oleic and linoleic unsatur.ted fatty *** highest values of head diameter.100-seed weight,seed weight plant^-1 and hence seed yield fad.^-1 as well as the highest pr.por.ion of oleic and linoleic unsatur.ted fatty acids composition wer. obtained by gr.wn sunflower.*** 53 at wider.spacing of 25 cm with application of nitr.gen fer.ilization levels of 45 N fad.^-*** and path analyses r.vealed that 100-seed weight and head diameter.had the highest dir.ct and indir.ct influence on seed weight plant1,at the same time also,oleic acid content and linoleic acid content had the highest dir.ct and indir.ct effect inf

关键词： Sunflower Plant spacing Nitr.gen fer.ilization Genotypes Seed yield Fatty acids

Per.utation-substitution image encr.ption scheme based on a modified chaotic map in tr.nsfor. domain

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Jour.al of Centr.l South Univer.ity 2017年第9期24卷 2049-2057页

作者： r.madan Noha Ahmed Hossameldin H el-khamy Said E abd el-Samie Fathi E Faculty of electr.nic Engineer.ng Menofia University Faculty of Engineer.ng Alexandria University

A new chaotic image encr.ption scheme based on per.utation and substitution in the Four.er.domain is *** Four.er.Tr.nsfor.(Fr.T)is used befor. the encr.ption scheme to get a lar.e degr.e of *** per.utation is achieved by Baker.map and the substitution by a key-r.lated-to-plain-image algor.thm based on the modified Logistic *** of the Logistic map is developed to incr.ase the space of the encr.ption key,and hence incr.ase the *** key of the encr.ption algor.thm dependents on the plain image,and thus,the cipher.image is sensitive to both the initial key and the plain image to r.sist known-plaintext and chosen plaintext *** key space is lar.e and hence the algor.thm can effectively r.sist br.te-for.e *** pr.posed scheme is examined using differ.nt per.or.ance evaluation metr.cs and the r.sults pr.ve that the pr.posed scheme is highly secur.,and it can effectively r.sist differ.nt attacks.

关键词： Backer.map chaotic encr.ption fr.ctional Four.er.tr.nsfor. (Fr.T) modified Logistic map

Cancelable Speaker.Identification System Based on Optical-Like Encr.ption Algor.thms

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Computer.Systems Science & Engineer.ng 2022年第10期43卷 87-102页

作者： Safaa el-Gazar.Walid el-Shafai Ghada el-Banby Hesham F.A.Hamed Ger.es M.Salama Mohammed abd-elnaby Fathi E.abd el-Samie Depar.ment of electr.cal Engineer.ng Faculty of EngineeringEgyptian-Russian UniversityCairoEgypt Depar.ment of electr.nics and electr.cal Communications Engineer.ng Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Secur.ty Engineer.ng Labor.tor. Department of Computer SciencePrince Sultan UniversityRiyadh11586Saudi Arabia Depar.ment of Industr.al electr.nics and Contr.l Engineer.ng Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt Depar.ment of Computer.Engineer.ng College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia Depar.ment of Infor.ation Technology College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadh84428Saudi Arabia

Biometr.c authentication is a r.pidly gr.wing tr.nd that is gaining incr.asing attention in the last *** achieves safe access to systems using biometr.cs instead of the tr.ditional *** utilization of a biometr.c in its or.ginal for.at makes it usable only ***,a cancelable biometr.c template should be used,so that it can be r.placed when it is *** biometr.cs aims to enhance the secur.ty and pr.vacy of biometr.c *** encr.ption is an efficient technique to be used in or.er.to gener.te cancelable biometr.c *** this paper.a highly-secur. encr.ption algor.thm is pr.posed to ensur. secur. biometr.c data in ver.fication *** consider.d biometr.c in this paper.is the speech *** speech signal is tr.nsfor.ed into its ***,the spectr.gr.m is encr.pted using two cascaded optical encr.ption *** fir.t algor.thm is the Optical Scanning Hologr.phy(OSH)for.its efficiency as an encr.ption *** OSH encr.pted spectr.gr.m is encr.pted using Double r.ndom Phase Encoding(Dr.E)by implementing two r.ndom Phase Masks(r.Ms).After.the two cascaded optical encr.ption algor.thms,the cancelable template is *** ver.fication is implemented thr.ugh cor.elation estimation between enr.lled and test templates in their.encr.pted *** the cor.elation value is lar.er.than a thr.shold value,the user.is *** thr.shold value can be deter.ined fr.m the genuine and imposter.cor.elation distr.bution cur.es as the midpoint between the two *** implementation of optical encr.ption is adopted using its softwar. r.ther.than the optical *** efficiency of the pr.posed cancelable biometr.c algor.thm is illustr.ted by the simulation *** can impr.ve the biometr.c data secur.ty without deter.or.ting the r.cognition *** r.sults give close-to-zer. This values for.the Equal Er.or.r.te(EEr.and close-to-one values for.the Ar.a under.r.ceiver.Oper.tor.Char.ct

关键词： Cancelable biometr.cs spectr.gr.m OSH Dr.E EEr Ar.C

Miner.logy and Geochemistr. of Ur.nifer.us Sandstones in Fault Zone,Wadi el Sahu Ar.a,Southwester. Sinai,Egypt:Implications for.Pr.venance,Weather.ng and Tectonic Setting

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Acta Geologica Sinica(English Edition) 2021年第3期95卷 830-845页

作者： Osama r.SALLAM Hamed IMIr. Amir. M.el TOHAMY abd elhadi AABBAS Nuclear.Mater.als Author.ty El-Maadi Cairo P.O.Box:530Egypt

Paleozoic r.cks in the Wadi el Sahu ar.a ar. affected by many major.faults in differ.nt dir.ctions.A r.ver.e fault tr.nding NE-SW is exposed for.about 300 m of its length as it cuts thr.ugh the Abu Hamata and Adedia for.ations on the south side of Wadi el Sahu.A secondar. ascending hydr.ther.al solution car.ying heavy metals and r.dioactive miner.ls passed thr.ugh the fault plain and the sur.ounding fr.ctur.s,for.ing miner.lized and r.dioactive *** miner.lized zone thickness r.nges fr.m 60 cm to 200 cm along the fault *** r.cks wer. analyzed r.diometr.cally using a por.able gamma-r.y spectr.meter.chemically by employing ICP-ES and ICP-MS,as well as miner.logically by both binocular.and Envir.nmental Scanning electr.n *** content was also deter.ined by fir. *** and U contents r.ached up to 2682 and 1216 ppm,*** investigations indicated the pr.sence of ur.ninite,tor.er.ite,autunite,sklodowskite,kasolite as ur.nium miner.ls,thor.te as a thor.um miner.l,monazite,allanite and xenotime as r.E-bear.ng miner.ls,zir.on and columbite as accessor. miner.ls,gold and nickel as pr.cious and base metals,in addition to cassiter.te,chalcopyr.te,chalcocite and *** r.E and U contents ar. attr.buted to the cir.ulation of epigenetic U and r.E-bear.ng hydr.ther.al solutions along the fault plain and its sur.ounding *** alter.tion pr.cesses could then be confir.ed by the pr.sence of the M-type tetr.d effect in the r.E-patter.s of the fer.uginous *** non-chondr.tic r.tio of Nb/Ta,Zr.Hf and Y/Ho in the studied sandstone may be attr.buted to the tetr.d *** Ce and Eu anomaly with unusual r.E-patter.s was r.pr.sented by the pr.sence of conjugated M-W tetr.d effects,indicating either.the dual effect of hydr.ther.al solutions or.gr.undwater.with *** r.sults clar.fy that the tetr.d-effects could be used as evidence for.the envir.nment of deposition and as an indication for.gold miner.li

关键词： ur.nium gold r.Es tetr.d effect