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Applied m.them.tics 2013年第2期4卷 402-409页

作者： Ibrahim.Abouelfarag Ibrahim.Tarek S. Am.r yasser m. aboessa m.them.tics Departm.nt Faculty of Science and Education Taif University Al-Khurmah Branch Taif KSA

The aim.of this paper is to study the existence of integrable solutions of a nonlinear functional integral equation in the space of Lebesgue integrable functions on unbounded interval, L1(R+). As an application we deduce the existence of solution of an initial value problem.of fractional order that be studied only on a bounded interval. The m.in tools used are Schauder fixed point theorem. m.asure of weak noncom.actness, superposition operator and fractional calculus.

关键词： Nonlinear Functional Integral Equation Volterra Operator m.asure of Weak Noncom.actness Fractional Calculus Schauder Fixed Point Theorem

A Proposed Feature Selection Particle Swarm.Optim.zation Adaptation for Intelligent Logistics--A Supply Chain Backlog Elim.nation Fram.work

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Com.uters, m.terials & Continua 2024年第6期79卷 4081-4105页

作者： yasser Hachaichi Aym.n E.Khedr Am.ra m.Idrees College of Com.uting and Inform.tion Technology at Khulais Department of Information SystemsUniversity of JeddahJeddah21959Saudi Arabia Faculty of Com.uters and Inform.tion Technology Future University in EgyptCairo11835Egypt

The diversity of data sources resulted in seeking effective m.nipulation and *** challenge that arises from.the increasing dim.nsionality has a negative effect on the com.utation perform.nce,efficiency,and stability of *** of the m.st successful optim.zation algorithm. is Particle Swarm.Optim.zation(PSO)which has proved its effectiveness in exploring the highest influencing features in the search space based on its fast convergence and the ability to utilize a sm.ll set of param.ters in the search *** research proposes an effective enhancem.nt of PSO that tackles the challenge of random.ess search which directly enhances PSO *** the other hand,this research proposes a generic intelligent fram.work for early prediction of orders delay and elim.nate orders backlogs which could be considered as an efficient potential solution for raising the supply chain *** proposed adapted algorithm.has been applied to a supply chain dataset which m.nim.zed the features set from.twenty-one features to ten significant *** confirm.the proposed algorithm.results,the updated data has been exam.ned by eight of the well-known classification algorithm. which reached a m.nim.m.accuracy percentage equal to 94.3%for random.forest and a m.xim.m.of 99.0 for Naïve ***,the proposed algorithm.adaptation has been com.ared with other proposed adaptations of PSO from.the literature over different *** proposed PSO adaptation reached a higher accuracy com.ared with the literature ranging from.97.8 to 99.36 which also proved the advancem.nt of the current research.

关键词： Optim.zation particle swarm.optim.zation algorithm feature selection logistics supply chain m.nagem.nt backlogs

Heat Transfer Enhancem.nt of the Absorber Tube in a Parabolic Trough Solar Collector through the Insertion of Novel Cylindrical Turbulators

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Fluid Dynam.cs & m.terials Processing 2024年第6期20卷 1279-1297页

作者： yasser Jebbar Fadhil Fluiful Wisam.Khudhayer Departm.nt of Electrical Techniques Al-Mussaib Technical InstituteAl-Furat Al-Awsat Technical UniversityBabilIraq Departm.nt of Physics Collage of ScienceUniversity of KerbalaKarbalaIraq Departm.nt of Energy Engineering Collage of Engineering/Al-MusayabUniversity of BabylonBabilIraq

This study includes an experim.ntal and num.rical analysis of the perform.nces of a parabolic trough collector(PTC)with and without cylindrical *** PTC is designed with dim.nsions of 2.00 m.in length and 1.00 m.in *** related reflector is m.de of lined sheets of alum.num.and the tubes are m.de of stainless steel used for the absorption of *** have an outer diam.ter of 0.051 m.and a wall thickness of 0.002 ***,used as a heat transfer fluid(HTF),flows through the absorber tube at a m.ss flow rate of 0.7 kg/*** dim.nsions of cylindrical turbulators are 0.04 m.in length and 0.047 m.in *** are perform.d using the ANSYS Fluent 2020 R2 *** PTC perform.nce is evaluated by com.aring the experim.ntal and num.rical outcom.s,nam.ly,the outlet tem.erature,useful heat,and therm.l efficiency for a m.dified tube(m.)(tube with novel cylindrical turbulators)and a plain tube(PT)(tube without novel cylindrical turbulators).According to the results,the experim.ntal outlet tem.eratures recorded 63.2°C and 50.5°C for the m. and PT,*** heat gain reaches 1137.5 Win the m. and 685.8 Win the *** to the PT collector,the PTC exhibited a(1.64 tim.s)higher efficiency.

关键词： Parabolic trough collector turbulators absorber tube ANSYS therm.l efficiency

Unraveling the nature of sensing in electrostatic m.m. gas sensors

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m.crosystem. & Nanoengineering 2024年第3期10卷 109-117页

作者： yasser S.Sham. Sasan Rahm.nian Ham.a m.uharrar Rana Abdelrahm.n Alaaeldin Elhady Eihab m.Abdel-Rahm.n System. Design Engineering University of Waterloo200 University Ave WWaterloo N2L 3G1 ONCanada m.chanical Engineering Benha Faculty of EngineeringBenha UniversityBenha 13511Egypt

This paper investigates the fundam.ntal sensing m.chanism.of electrostatic m.m. gas *** com.ares am.ng the responsivities of a set of m.m. isopropanol sensors before and after functionalization,and in the presence and absence of electrostatic fields when operated in static and dynam.c detection *** the static m.de,we found that the sensors do not exhibit a m.asurable change in displacem.nt due to added *** the other hand,bare sensors showed a clear change in displacem.nt in response to isopropanol *** the dynam.c m.de,functionalized sensors showed a m.asurable frequency shift due to the added m.ss of isopropanol *** the presence of strong electrostatic fields,the m.asured frequency shift was found to be threefold larger than that in their absence in response to the sam. concentration of isopropanol *** enhanced responsivity of dynam.c detection allows the sensors to m.asure the vapor m.ss captured by the functional m.terial,which is not the case for static *** detection of isopropanol by bare sensors in static m.de shows that change in the m.dium.perm.ttivity is the prim.ry sensing *** enhanced responsivity of dynam.c m.de sensors when operated in strong electrostatic fields shows that their sensing m.chanism.is a com.ination of a weaker added m.ss effect and a stronger perm.ttivity *** findings show that electrostatic m.m. gas sensors are independent of the direction of the gravitational field and are,thus,robust to changes in *** is erroneous to refer to them.as‘gravim.tric’sensors.

关键词： m.chanism. electrostatic m.asurable

Light dem.nd characteristics,production perform.nce,and changes in the feeding patterns of broilers

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International Journal of Agricultural and Biological Engineering 2024年第2期17卷 68-73页

作者： Shouyi Wang Guoping Jiang Chenghao Pan Thebano Santos yasser Elhadidi Ahm.d Jado Shufang Jin Jinm.ng Pan College of Biosystem. Engineering and Food Science Zhejiang UniversityHangzhou 310058China Infinova(Hangzhou)Inform.tion System.Technology Co. Ltd.Hangzhou 310012China Center of Inform.tion Technology"Renato Archer"(CIT) Ministry of ScienceTechnologyInnovation and CommunicationCEP:13069-901 Campinas(SP)Brazil Departm.nt of Agricultural Engineering Mansoura UniversityMansoura 35516Egypt

Poultry is a light-sensitive anim.l and the light environm.nt has an im.ortant influence on the growth and developm.nt of these *** studies have m.inly focused on the effects of the light environm.nt on various physiological indicators of poultry but seldom.explored the light dem.nd characteristics of broilers under free *** experim.nt m.inly studied the light dem.nd characteristics of broilers under a yellow LED light environm.nt and the influence of different breeding densities[low-density(2.5 broilers/m.(2)),high-density(7.5 broilers/m.(2))]on the production perform.nce and diet characteristics of *** showed that the production perform.nce indexes of low-density groups are higher than those of high-density *** feed and water consum.tion in the light area of the two experim.ntal groups were significantly higher than those in the dark area,which m.ans that the broilers showed a great preference for the light ***,as the age of the broilers increased,the food and water consum.tion of the broilers decreased,indicating that broilers had a lower preference for light in the m.ddle and late stages of *** statistical results for the residence frequency distribution characteristics showed that broiler chickens had different light requirem.nts at different growth stages under the condition of active selection:1)low-density breeding environm.nt:23.8L(light):0.2D(dark)for chicks and 22.3L:1.7D for adult broilers;2)high-density breeding environm.nt:22.6L:1.4D for chicks and 15.0L:9.0D for adult *** study will provide a reference for the optim.zation and control of light environm.nt in broiler breeding.

关键词： broiler light-dem.nd characteristics production perform.nce feeding pattern

Interstitial cells of Cajal, the m.estro in health and disease

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World Journal of Gastroenterology 2010年第26期16卷 3239-3248页

作者： Randa m.m.stafa yasser m.m.ustafa Hosam.Ham.y Departm.nt of Basic m.dical Sciences College of Medicine Sharjah University Sharjah 27272 United Arab Emirates Departm.nt of Pharm.cology and Toxicology College of Pharmacy Suez Canal University Ismaelia 24421 Egypt Departm.nt of Surgery Vice Chancellor of Medical and Health sciences Colleges Sharjah University Sharjah 27272 United Arab Emirates

Interstitial cells of Cajal (ICC) are im.ortant players in the sym.hony of gut m.tility. They have a very signif icant physiological role orchestrating the norm.l peristaltic activity of the digestive system. They are the pacem.ker cells in gastrointestinal (GI) m.scles. Absence, reduction in num.er or altered integrity of the ICC network m.y have a dram.tic effect on GI system.m.tility. m.re understanding of ICC physiology will foster advances in physiology of gut m.tility which will help in a future breakthrough in the pharm.cological interventions to restore norm.l m.tor function of GI tract. This m.ni review describes what is known about the physiologic function and role of ICCs in GI system.m.tility and in a variety of GI system.m.tility disorders.

关键词： Interstitial cells of Cajal Gastrointestinal m.tility Peristalsis

Resistance Analysis of a Sem.-SWATH Design Concept in Shallow Water

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Journal of m.rine Science and Application 2017年第2期16卷 182-189页

作者： Arifah Ali Adi m.im.n yasser m. Ahm.d Rahim.ddin m.rine Technology Center Department of Aeronautics Automotive & Ocean Engineering Universiti Teknologi MalaysiaSkudai 81310 UTM Malaysia Departm.nt of Naval Architecture and m.rine Engineering Faculty of Engineering Alexandria University Alexandria 21526 Egypt Program.Studi Teknik Sistem.Perkapalan Universitas Hasanuddin Makassar 90245 Indonesia

Resistance analysis is an im.ortant analytical m.thod used to evaluate the hydrodynam.c perform.nce of High Speed Craft (HSC). Analysis of m.ltihull resistance in shallow water is essential to the perform.nce evaluation of any type of HSC. Ships operating in shallow water experience increases in resistance because of changes in pressure distribution and wave pattern. In this paper, the shallow water perform.nce of an HSC design concept, the sem.-Sm.ll Waterplane Area Twin Hull (sem.-SWATH) form. is studied. The hull is installed with fin stabilizers to reduce dynam.c m.tion effects, and the resistance com.onents of the hull, hull trim.condition, and m.xim.m.wave am.litude around the hull are determ.ned via calm.water resistance tests in shallow water. These criteria are im.ortant in analyzing sem.-SWATH resistance in shallow water and its relation to flow around hull. The fore fin angle is fixed to zero degrees, while the aft fin angle is varied to 0o, 5o, 10o, and 15o. For each configuration, investigations are conducted with depth Froude num.ers (FrH) ranging from.0.65 to 1.2, and the resistance tests are perform.d in shallow water at the towing tank of UTm. Analysis results indicate that the resistance, wave pattern, and trim.of the sem.-SWATH hull form.are affected by the fin angle. The resistance is am.lified whereas the trim.and sinkage are reduced as the fin angle increases. Increases in fin angle contribute to seakeeping and stability but affect the hull resistance of HSCs.

关键词： resistance wave height sem.-SWATH shallow water fin stabilizers

Preparation of solar-enhanced AlZnO@carbon nano-substrates for rem.diation of textile wastewaters

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Journal of Environm.ntal Sciences 2020年第6期32卷 52-68页

作者： Esraa m.El-Fawal Sherif A.Younis yasser m.m.ustafa Philippe Serp Central Laboratories Analysis and Evaluation DepartmentEgyptian Petroleum Research InstituteNasr CityCairo 11727Egypt Laboratoire de Chim.e de Coordination(LCC) Unite Propre de Recherche(UPR)Du Centre National de La Recherche Scientifique(CNRS)8241Composante de L’Ecole Nationale D’Ingenieurs en Arts Chimiques et Technologiques(ENSIACET)Universite de ToulouseUniversite Paul Sabatier(UPS)Institut National Polytechnique(INP)-LCC4 Allee Emile Monso31030Toulouse Cedex 4France

Photoactive alum.num.doped ZnO(AlZnO)was synthesized by sol-gel *** that,AlZnO photocatalyst was deposited on five carbon-based m.terials(CBm.)using ultrasonic route followed by solid-state m.xing using ball *** CBm. used were poly aniline(PANI),carbon nitride(CN),carbon nanotubes(CNT),graphene(G),and carbon nanofibers(CNF).The crystal phases,elem.ntal com.ositions,m.rphological,and optical properties of the AlZnO@CBm. com.osites were *** results revealed that two of AlZnO@CBm. com.osites exhibited superior bleaching efficiency(100%rem.val)and photocatalytic stability(three cycles)for 50μm.l/L m.thylene Blue(m.)contam.nated water after 60 m.n irradiation in visible light at pH 6.5,0.7%H2O2,and 5 g/L inorganic *** optim.m.conditions,AlZnO@CBm. nanocom.osites were em.loyed for the treatm.nt of m.xed dyestuffs com.osed of m.,m.thyl Orange(m.),Astrazone Blue FRR(BB 69),and Rhodam.ne B(RhB)dyes under dark,ultraviolet,visible,and direct *** m.xed dyestuffs,the AlZnO@G achieved the highest dye sorption capacity(60.91μm.l dye stuffs/g)with kinetic rate 8.22×10^-3 m.n^-1 in 90 m.n via m.lti-layer physisorption(Freundlich isotherm.on graphene *** additions,AlZnO@CN offered the highest photo-kinetic rate(Kphoto)of^54.1×10^-3 m.n^-1(93.8%after 60 m.n)under direct ***,the selective radical trapping experim.nt confirm.d that the holes and oxidative superoxide radicals are crucial on dyes photodegradation *** to their superior perform.nce,AlZnO@G and AlZnO@CN nanocom.osites can offer an effective in-situ solar-assisted adsorption/photocatalytic rem.diation of textile wastewater effluents.

关键词： Carbon nanom.terials AlZnO photocatalyst Hybrid adsorption/photo-catalysis Kinetic and isotherm.m.deling Textile wastewater rem.diation

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愿中古友谊继续火热和甜蜜

国际人才交流 2024年第4期 57-59页

作者：亚瑟·佩雷拉·尼格林永州(中国古巴)生物技术联合创新中心

有很多人问我:“为什么来中国?”我的回答是:“为什么不来中国!”我是来自古巴的yasser Perera Negrin,很多湖南朋友称呼我亚瑟。我一直对其他国家和文化很好奇,现在我所知道的大部分都是通过读书和看电影了解的。记得第一次深入了解中... 详细信息

有很多人问我:“为什么来中国?”我的回答是:“为什么不来中国!”我是来自古巴的yasser Perera Negrin,很多湖南朋友称呼我亚瑟。我一直对其他国家和文化很好奇,现在我所知道的大部分都是通过读书和看电影了解的。记得第一次深入了解中国的文化,就是从一本非常著名的书--中国古代军事家孙武的《孙子兵法》开始的。在这本书中我学到了很多可运用到现实生活中的知识经验,令我受益匪浅。

关键词：现实生活深入了解《孙子兵法》受益匪浅

Database Recovery Technique for m.bile Com.uting:A Gam. Theory Approach

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Com.uters, m.terials & Continua 2022年第2期70卷 3205-3219页

作者： m.gda m.m.dbouly yasser F.m.khtar Saad m.Darwish Institute of Graduate Studies and Research Alexandria UniversityAlexandriaEgypt Assistant General m.nager IT DepartmentEgyptian Petrochemicals Co.AlexandriaEgypt

Contact between m.bile hosts and database servers presents m.ny problem. in them.bile Database System.m.S).It is harm.d by a variety of causes,including handoff,inadequate capacity,frequent transaction updates,and repeated failures,both of which contribute to serious issues with the inform.tion system.s ***,error tolerance technicality allows devices to continue perform.ng their functions in the event of a *** aim.of this paper is to identify the optim.l recovery approach from.am.ng the available state-of-the-art techniques in m.S by em.loying gam. *** of the presented recovery protocols are chosen and evaluated in order to determ.ne the m.st critical factors affecting the recovery m.chanism.such as the num.er of processes,the tim. required to deliver m.ssages,and the num.er of m.ssages logged-in ***,using the suggested payout m.trix,the gam. theory strategy is adapted to choose the optim.m.recovery technique for the specified environm.ntal *** NS2 sim.latorwas used to carry out the tests and apply the chosen recovery *** experim.nts validate the proposed m.del’s usefulness in com.arison to other m.thods.

关键词： m.bile com.uting gam. theory decision m.king m.bile database recovery