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Journal of Materials.s.ience & Technology 2021年第19期78卷 100-109页

作者： Liqianyun Xu Liuyang Zhang Bei Cheng Jiaguo Yu ahmed A.al-Ghamdi s.Wageh s.ate Key Laboratory of Advanced Technology for Materials.s.nthes.s.and Proces.ing Wuhan University of TechnologyWuhan430070China s.hool of Materials.s.ience and Engineering Zhengzhou UniversityZhengzhou.450001China Department of Phys.cs Faculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia

Poor conductivity and rate capability are the obs.acles.faced by nickel-cobalt compos.tes.as.electrode materials.for s.percapacitor ***,s.mple electrochemical treatment conducted by cyclic voltammetry is.applied and the overall performance of the active material is.cons.derably *** dis.over that this.treatment triggers.the formation of Ni-Co-Cu ternary compos.te and optimizes.the crys.al s.ructure of the untreated *** areal capacitance of the treated s.mple rockets.up to 6.13 F cm^(-2)at 2 m A cm^(-2),almos. 13 times.higher than the untreated ***,the res.s.ance is.s.bs.antially reduced by cyclic voltammetry ***,the Coulombic efficiency and s.ability are concurrently *** reas.ns.behind this.treatment are mulled over and reas.nable hypothes.s.is.*** s.udy provides.a cheap and effortles. way to reform the s.ructures.of as.obtained s.mples.as.well as.vigorous.y rais. the performance of current available materials.

关键词： Cyclic voltammetry Ni-Co-Cu ternary compos.te Ion exchange s.percapacitor

The Two-Dimens.onal s.pers.nic Flow and Mixing with a Perpendicular Injection in a s.ramjet Combus.or

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Journal of Thermal s.ience 2003年第4期12卷 371-380页

作者： Mohammad ali s. ahmed A.K.M. s.drul Is.am Department of Mechanical Engineering Bangladesh University of Engineering and Technology (BUET) Dhaka-1000 Bangladesh.Department of Mechanical Engineering Bangladesh University of Engineering and Technology (BUET) Dhaka-1000 Bangladesh.Department of Mechanical Engineering Bangladesh University of Engineering and Technology (BUET) Dhaka-1000 Bangladesh.

A numerical inves.igation has.been performed on s.pers.nic mixing of hydrogen with air in a s.ramjet (s.pers.nic Combus.ion Ramjet) combus.or and its.flame holding capability by s.lving Two-Dimens.onal full Navier-s.okes.equations. The main flow is.air entering through a finite width of inlet and gas.ous.hydrogen is.injected perpendicularly from the s.de wall. An explicit Harten-Yee Non-MUs.L Modified-flux-type TVD s.heme has.been us.d to s.lve the s.s.em of equations. and a zero-equation algebraic turbulence model to calculate the eddy vis.os.ty coefficient. In this.s.udy the enhancement of mixing and good flame holding capability of a s.pers.nic combus.or have been inves.igated by varying the dis.ance of injector pos.tion from left boundary keeping cons.ant the backward-facing s.ep height and other calculation parameters. The res.lts.s.ow that the configuration for s.all dis.ance of injector pos.tion has.high mixing efficiency but the ups.ream recirculation can not evolved properly which is.an important factor for flame holding capability. On the other hand, the configuration for very long dis.ance has.lower mixing efficiency due to lower gradient of hydrogen mas. concentration on the top of injector caus.d by the expans.on of s.de jet in both ups.ream and downs.ream of injector. For moderate dis.ance of injector pos.tion, large and elongated ups.ream recirculation can evolve which might be activated as.a good flame holder.

关键词： s.ramjet engine TVD s.heme finite width of inlet s.pers.nic mixing parallel air s.ream flame holding.

Temperature Uniformity,Correlations.and the Flow Field in s.irling Impinging Jets

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Journal of Thermal s.ience 2023年第2期32卷 662-679页

作者： Zahir U.ahmed Yas.r M.al-ABDELI Department of Mechanical Engineering Khulna University of Engineering&TechnologyKhulna 9203Bangladesh s.hool of Engineering Edith Cowan UniversityJoondalupWA 6027Australia

Infrared thermography,velocity and impingement pres.ure meas.rements.alongs.de numerical modelling are us.d in this.s.udy to res.lve(heated)s.rface temperature dis.ributions.of turbulent s.irling impinging jets.for two Reynolds.numbers.Re=11600 and 24600).Whils. building upon earlier dis.overies.for this.s.me geometry,this.paper provides.three new contributions.(1)identifying the role of impingement dis.ance(H/D)as.a deciding factor in the trade-off between more efficient heat trans.er(at high s.irl numbers.and achieving better s.bs.rate temperature uniformity(lower gradients.,(2)developing correlations.to predict Nus.elt number for s.irling and non-s.irling cooling jets.and(3)predicting the underlying mixing field in thes. jets.and its.interplay with the thermal dis.ributions.*** indicate s.bs.rate temperature uniformity varies.bas.d on H/D and s.irl intens.ty(s.with a s.gnificant level of thermal non-uniformity occurring in near-field impingement(H/D=1)at s.ronger s.irl(s.0.59 and 0.74).Four correlations.des.ribing the effects.of s.Re,and H on the average heat trans.er and s.agnation heat trans.er are developed and yield accuracies.of 8%and 12%,*** recirculation near the impingement s.rface is.predicted at H/D=1 for s.ronger s.irl jets.which dis.ppears.at other s.bs.rate *** peak wall s.ear s.res. reduces.and the flow impingement becomes.radially wider at higher H/D and *** turbulence or eddy vis.os.ty regions.for non-s.irling jets.s.0)are predicted in the s.ear layer and entrainment regions.at H/D=1,but s.ch turbulence is.confined to the impingement and wall jet regions.for s.rongly s.irling flows.

关键词： Temperature uniformity Nus.elt number IR imaging CTA RANs

Trans.ocation of pharmaceuticals.and pers.nal care products.PPCPs.into plant tis.ues.A review

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Emerging Contaminants 2017年第4期3卷 132-137页

作者： Raya s.lim al-Fars. Mus.taque ahmed ahmed al-Bus.idi B.s.Choudri College of Agricultural and Marine s.iences Sultan Qaboos UniversityOman Center for Environmental s.udies.and Res.arch Sultan Qaboos UniversityOman

Occurrence and fate of pharmaceuticals.and pers.nal care products.PPCPs.in the environment and the potential cons.quences.for human health is.of s.rious.*** the current review,we have tried to provide a s.mmary on recent res.arch and an overview of PPCPs.in the s.il-plant s.s.ems.in the environment and analytical methods.us.d for determination of PPCPs.in plant *** review als. include highlights.on the fate of PPCPs.in agricultural s.ils.receiving treated was.ewater irrigation or bios.lids.amendment,and plant uptake of PPCPs.under laboratory and field *** have s.own to be releas.d to the environment and may caus. s.gnificant impacts.on different environmental *** roots.s.owed their abilities.to uptake and trans.er of PPCPs.into plant *** uptake of PPCPs.varies.depending on crop type and phys.ochemical properties.of the chemical compound that were *** of contaminated crops.with PPCPs.res.dues.may caus. s.rious.health *** chromatography in combination with mas. chromatography was.found to be the mos. popular analytical ins.rument us.d for PPCPs.determination in different ***,the information gaps.and few s.gges.ions.for future res.arch have been propos.d in this.review.

关键词： PPCPs Root uptake Trans.ocation Human expos.re Analytical methods

Bi-metallic catalys.s.of mes.porous.al_2O_3 s.pported on Fe, Ni and Mn for methane decompos.tion: Effect of activation temperature

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Chines. Journal of Chemical Engineering 2018年第9期26卷 1904-1911页

作者： Anis.H.Fakeeha ahmed s.al-Fates. Bis.ajit Chowdhury ahmed A.Ibrahim Was.m U.Khan s.ahid Has.an Kas.m s.s.deen ahmed Elhag Abas.eed Chemical Engineering Department College of Engineering King Saud University Department of Applied Chemis.ry Indian School of Mines

Methane decompos.tion reaction has.been s.udied at three different activation temperatures.500℃,800℃ and950℃）over mes.porous.alumina s.pported Ni–Fe and Mn–Fe bas.d bimetallic *** co-impregnation of Ni on Fe/al2O3the activity of the catalys. was.retained even at the high activation temperature at 950℃ and up to180 *** Ni promotion enhanced the reducibility of Fe/al2O3oxides.s.owing higher catalytic activity with a hydrogen yield of 69%.The reactivity of bimetallic Mn and Fe over al2O3catalys. decreas.d at 800℃ and 950℃ activation *** s.udies.revealed that the catalys. could be effectively recycled up to *** addition of O2（1 ml,2 ml,4 ml）in the feed enhanced s.bs.antially CH4convers.on,the yield of hydrogen and the s.ability of the catalys..

关键词： Carbon nanotube Hydrogen production Methane decompos.tion Manganes. promoter Nickel promoter

s.ructural,electronic,and magnetic properties.of Co-doped ZnO

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Chines. Phys.cs.B 2012年第9期21卷 414-421页

作者： Bakhtiar Ul Haq A. Afaq R. ahmed s. Nas.em Center of Excellence in s.lid s.ate Phys.cs University of the Punjab Quid-e-Azam CampusLahore-54590 Pakistan Department of Phys.cs Faculty of Science Universiti Teknologi Malaysia Skudai Johar Malaysia Center of Excellence in s.lid s.ate Phys.cs University of the Punjab Quid-e-Azam Campus Lahore-54590 Pakistan

Dens.ty functional theory bas.d calculations.have been carried out to s.udy s.ructural, electronic, and magnetic properties.of Znl-xCoxO （x = 0, 0.25, 0.50, 0.75） in the zinc-blende phas., and the generalized gradient approximation propos.d by Wu and Cohen has.been us.d. Our calculated lattice cons.ants.decreas. while the bulk moduli increas. with the increas. of Co2＋ concentration. The calculated s.in polarized band s.ructures.s.ow the metallic behavior of Co-doped ZnO for both the up and the down s.in cas.s.with various.doping concentrations. Moreover, the electron population is.found to s.ift from the Zn-O bond to the Co-O bond with the increas. of Co2~ concentration. The total magnetic moment~ the inters.itial magnetic moment, the valence and the conduction band edge s.in s.litting energies. and the exchange cons.ants.decreas., while the local magnetic moments.of Zn, Co, O, the exchange s.in s.litting energies. and crys.al field s.litting energies.increas. with the increas. of dopant concentration.

关键词： dens.ty functional theory magnetic s.miconductors generalized gradient approximation

Optimized Artificial Neural Network Techniques.to Improve Cybers.curity of Higher Education Ins.itution

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Computers. Materials.& Continua 2022年第8期72卷 3385-3399页

作者： Abdullah s.ad al-Malais. al-Ghamdi Mahmoud Ragab Maha Farouk s.s.bir ahmed Elhas.anein As.raf A.Gouda Information s.s.ems.Department Faculty of Computing and Information Technology King Abdulaziz UniversityJeddah21589Saudi Arabia Information Technology Department Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia Centre of Artificial Intelligence for Precis.on Medicines King Abdulaziz UniversityJeddah21589Saudi Arabia Mathematics.Department Faculty of ScienceAl-Azhar UniversityNaser City11884CairoEgypt Mathematics.Department College of ScienceUniversity of BishaBishaSaudi Arabia Mathematics.Department Faculty of ScienceDamanhour UniversityDamanhourEgypt

Education acts.as.an important part of economic growth and improvement in human *** educational s.ctors.have trans.ormed a lot in recent days.and Information and Communication Technology(ICT)is.an effective part of the education *** every action in univers.ty and college,right from the proces. fromcouns.lling to admis.ions.and fee depos.ts.has.been *** records.quiz,evaluation,mark,and grade s.bmis.ions.involved the utilization of the ***,s.curity is.es.ential to accomplis. cybers.curity in higher s.curity ins.itutions.HEIs..In this.view,this.s.udy develops.an Automated Outlier Detection for Cybers.curity in Higher Education Ins.itutions.AOD-Cs.EI)*** AOD-Cs.EI technique intends.to determine the pres.nce of intrus.ons.or attacks.in the *** AOD-Cs.EI technique initially performs.data pre-proces.ing in two s.ages.namely data convers.on and clas. *** addition,the Adaptive s.nthetic(ADAs.N)technique is.exploited for the removal of outliers.in the ***,the s.arrow s.arch algorithm(s.A)with deep neural network(DNN)model is.us.d for the clas.ification of data into the exis.ence or abs.nce of intrus.ons.in the HEIs.***,the s.A is.utilized to effectually adjus. the hyper parameters.of the DNN *** order to s.owcas. the enhanced performance of the AOD-Cs.EI technique,a s.t of s.mulations.take place on three benchmark datas.ts.and the res.lts.reported the enhanced efficiency of the AOD-Cs.EI technique over its.compared methods.with higher accuracy of 0.9997.

关键词： Higher s.curity ins.itutions intrus.on detection s.s.em artificial intelligence deep neural network hyperparameter tuning deep learning

Parkins.n’s.Detection Us.ng RNN-Graph-Ls.M with Optimization Bas.d on s.eech s.gnals

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Computers. Materials.& Continua 2022年第7期72卷 871-886页

作者： ahmed s.almas.ud Tais.er Abdalla Elfadil Eis. Fahd N.al-Wes.bi Abubakar Els.fi Mes.er al Duhayyim Is.faq Yas.en Manar ahmed Hamza Abdelwahed Motwakel Department of Information s.s.ems College of Computer and Information SciencesPrince Sultan UniversityMahayil62529Saudi Arabia Department of Information s.s.ems.Girls.s.ction King Khalid UniversityMahayil62529Saudi Arabia Department of Computer s.ience College of Science and Artsat MahayilKing Khalid UniversityMahayil62529Saudi Arabia Faculty of Computer and IT Sana’a UniversitySana’aYemen Department of s.ftware Engineering College of Computer Science and EngineeringUniversity of JeddahSaudi Arabia Department of Natural and Applied s.iences College of Community-AflajPrince Sattam bin Abdulaziz UniversityMahayil62529Saudi Arabia Department of Computer and s.lf Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharj62529Saudi Arabia

Early detection of Parkins.n’s.Dis.as.(PD)us.ng the PD patients.voice changes.would avoid the intervention before the identification of phys.cal *** machine learning algorithms.were developed to detect PD ***,thes. ML methods.are lack in generalization and reduced clas.ification performance due to s.bject *** overcome thes. is.ues.this.propos.d work apply graph long s.ort term memory(GLs.M)model to clas.ify the dynamic features.of the PD patient s.eech *** propos.d clas.ification model has.been further improved by implementing the recurrent neural network(RNN)in batch normalization layer of GLs.M and optimized with adaptive moment es.imation(ADAM)on network hidden *** cons.der the importance of feature engineering,this.propos.d s.s.em us. Linear Dis.riminant analys.s.LDA)for dimens.onality reduction and s.ars.Auto-Encoder(s.E)for extracting the dynamic s.eech *** on the computation of energy content trans.ted from unvoiced to voice(ons.t)and voice to voiceles.(offs.t),dynamic features.are *** PD datas.ts.is.evaluated under 10 fold cros. validation without s.mple *** propos.d s.art PD detection method called RNN-GLs.M-ADAM is.numerically experimented with pers.s.ent phonations.in terms.of accuracy,s.ns.tivity,and s.ecificity andMatthew correlation *** evaluated res.lt of RNN-GLs.M-ADAM extremely improves.the PD detection accuracy than s.atic feature bas.d conventional ML and DL approaches.

关键词： Dimens.onality reduction LDA feature extraction auto encoder clas.ification recurrent neural network Ls.M and optimization

Pulmonary Dis.as.s.Decis.on s.pport s.s.em Us.ng Deep Learning Approach

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Computers. Materials.& Continua 2022年第10期73卷 311-326页

作者： Yazan al-Is.a ali Mohammad alqudah Hiam alquran ahmed al Is.a Department of Computer Engineering Yarmouk UniversityIrbid21163Jordan Department of Biomedical s.s.ems.and Informatics.Engineering Yarmouk UniversityIrbid21163Jordan Department of Biomedical Engineering Jordan University of Science and TechnologyIrbid 22110Jordan Pediatrician Mediclinic HospitalAl Ain14444UAE

Pulmonary dis.as.s.are common throughout the world,es.ecially in developing *** dis.as.s.include chronic obs.ructive pulmonary dis.as.s.pneumonia,as.hma,tuberculos.s.fibros.s.and recently *** general,pulmonary dis.as.s.have a s.milar footprint on ches. radiographs.which makes.them difficult to dis.riminate even for expert *** recent years.many image proces.ing techniques.and artificial intelligence models.have been developed to quickly and accurately diagnos. lung *** this.paper,the performance of four popular pretrained models.namely VGG16,Dens.Net201,DarkNet19,and XceptionNet)in dis.inguis.ing between different pulmonary dis.as.s.was.*** the bes. of our knowledge,this.is.the firs. publis.ed s.udy to ever attempt to dis.inguis. all four cas.s.normal,pneumonia,COVID-19 and lung opacity from Ches.X-Ray(CXR)*** models.were trained us.ng Ches.-X-Ray(CXR)images.and s.atis.ically tes.ed us.ng 5-fold cros. *** individual models.XceptionNet outperformed all other models.with a 94.775%accuracy and Area Under the Curve(AUC)of Receiver Operating Characteris.ic(ROC)of 99.84%.On the other hand,DarkNet19 repres.nts.a good compromis. between accuracy,fas. convergence,res.urce utilization,and near real time detection(0.33 s..Us.ng a collection of models.the 97.79%accuracy achieved by Ens.mble Features.was.the highes. among all s.rveyed methods.but it takes.the longes. time to predict an image(5.68 s..An efficient effective decis.on s.pport s.s.em can be developed us.ng one of thos. approaches.to as.is. radiologis.s.in the field make the right as.es.ment in terms.of accuracy and prediction time,s.ch a dependable s.s.em can be us.d in rural areas.and various.healthcare s.ctors.

关键词： Pulmonary dis.as.s deep learning lung opacity clas.ification majority voting ens.mble features

s.s.heme ZnO/WO3 heterojunction photocatalys. for efficient H2O2 production

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Journal of Materials.s.ience & Technology 2022年第29期124卷 193-201页

作者： Zicong Jiang Bei Cheng Yong Zhang s.Wageh ahmed A.al-Ghamdi Jiaguo Yu Linxi Wang s.ate Key Laboratory of Advanced Technology for Materials.s.nthes.s.and Proces.ing Wuhan University of TechnologyWuhan 430070China Laboratory of s.lar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China Department of Phys.cs Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Des.gning highly efficient photocatalys. for hydrogen peroxide(HO)production is.an ideal s.rategy to avoid the s.ortcomings.of traditional HOproduction and to realize the convers.on of s.lar energy to chemical *** this.work,a s.ep-s.heme(s.s.heme)heterojunction photocatalys. compos.d of Zn O and WOis.carefully prepared by hydrothermal and calcination method for efficient photocatalytic *** ZW30 compos.te photocatalys.s.exhibit enhanced activity with the highes. HO-production rate of 6788μmol *** res.lts.s.ow that the photocatalytic HOproduction proces. is.dominated by a direct two-electron Oreduction *** enhanced photocatalytic HO-production activity is.attributed to the formation of interfacial internal electric field(IEF)in the s.s.heme heterojunction,which boos.s.the s.atial s.paration of charge carriers.and enables.electrons.with the s.ronges. reduction power to participate in *** work provides.an in-depth ins.ght of the great advantages.of s.s.heme heterojunction in photocatalytic HOproduction.

关键词： Photocatalys.s Hydrogen peroxide s.ep-s.heme heterojunction O2 reduction Zinc oxide