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Repla.ement of a.ka.i silica.e solution with silica.fume in meta.a.lin-ba.ed geopolymers

Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2019年第5期26卷 555-564页

作者： a.med Nmiri Myria. Duc noureddine Ha.di Ouma.a.Ya.oghli-Ma.zouk Ezzeddine Sra.ra Na.iona. Center for Resea.ch in Ma.eria.s Sciences Technop?le Borj Cedria (CNRSM) Depa.tment of Chemistry Faculty of Sciences of Tunis University of Tunis El-Manar French Institute of Science a.d Technology for Tra.sport Development and Networks (IFSTTAR) Center for Studies a.d Expertise on Risks Environment Mobility and Development (CEREMA)

a.meta.a.lin(Mk)-ba.ed geopolymer cement from Tunisia. Mk mixed with different a.ounts of silica.fume(SiO_2/a._2O_3 mola. ra.io va.ying between 3.61 a.d 4.09) a.d sodium hydroxide(10M) a.d without a.y a.ka.i silica.e solution, is developed in this work. a.ter the sa.ples were cured a. room tempera.ure under a.r for 28 d, they were a.a.yzed by X-ra. diffra.tion(XRD), Fourier tra.sform infra.ed(FTIR) spectroscopy, environmenta. sca.ning electron microscopy, mercury intrusion porosimetry, ^(27)a. a.d ^(29)Si nuclea. ma.netic resona.ce(NMR) spectroscopy, a.d compression testing to esta.lish the rela.ionship between microstructure a.d compressive strength. The XRD, FTIR, a.d ^(27)a. a.d ^(29)Si NMR a.a.yses showed tha. the use of silica.fume instea. of a.ka.i silica.e solutions wa. fea.ible for ma.ufa.turing geopolymer cement. The Mk-ba.ed geopolymer with a.silica.fume content of 6 wt%(compa.ed with those with 2% a.d 10%), corresponding to a. SiO_2/a._2O_3 mola. ra.io of 3.84, resulted in the highest compressive strength, which wa. expla.ned on the ba.is of its high compa.tness with the sma.lest porosity. Silica.fume improved the compressive strength by filling interstitia. voids of the microstructure beca.se of its fine pa.ticle size. In a.dition, a. increa.e in the SiO_2/a._2O_3 mola. ra.io, which is controlled by the a.dition of silica.fume, to 4.09 led to a.geopolymer with low compressive strength, a.compa.ied by microstructures with high porosity. This high porosity, which is responsible for wea.nesses in the specimen, is rela.ed to the a.ount of unrea.ted silica.fume.

关键词： meta.a.lin silica fume geopolymer cement compressive strength

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Use of genetic a.gorithm in new a.proa.h to modeling of flood routing

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Journa. of Ocea.ology a.d Limnology 2019年第1期37卷 72-78页

作者： EL a.a.UI EL FELS a.delha.id a.a. noureddine Ba.HNOU a.i La.ora.ory of Geosciences a.d Environnement Department of Earth Sciences Faculty of Science and Technics Gueliz (P. B. 549) Cadi Ayyad University La.ora.ory a.plied Ma.hema.ics a.d Informa.ics Department of Math and Informatics Faculty of Science and Technics Gueliz (P. B. 549) Cadi Ayyad University

The hydrologica. models a.d simpli?ed methods of Sa.nt-vena.t equa.ions a.e used extensively in hydrologica. modeling, in pa.ticula. for the simula.ion of the ?ood routing. These models require speci?c a.d extensive da.a.tha. usua.ly ma.es the study of ?ood propa.a.ion a. a.duous pra.tice. We present in this work a.new model, ba.ed on a.tra.sfer function, this function is a.function of pa.a.etric proba.ility density, ha.ing a.physica. mea.ing with respect to the propa.a.ion of a.hydrologica. signa.. The inversion of the model is ca.ried out by a. optimiza.ion technique ca.led Genetic a.gorithm. It consists of evolving a.popula.ion of pa.a.eters ba.ed prima.ily on genetic recombina.ion opera.ors a.d na.ura. selection to?nd the minimum of a. objective function tha. mea.ures the dista.ce between observed a.d simula.ed da.a. The precision of the simula.ions of the proposed model is compa.ed with the response of the Ha.a.i model a.d the a.plica.ility of the model is tested on a.rea. ca.e, the N'Fis ba.in river, loca.ed in the High a.la. Occidenta., which presents elements tha. a.pea. fa.ora.le to the study of the propa.a.ion. The results obta.ned a.e very sa.isfa.tory a.d the simula.ion of the proposed model is very close to the response of the Ha.a.i model.

关键词： Genetic a.gorithm flood routing Ha.a.i model simula.ion propa.a.ion

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a.Cha.lenging a.proa.h to Improve the Low a.finity of a.rylic Fibres to Be Successfully Dyed with a.Bio-Colora.t Extra.ted from Gra.e Ma.c

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Journa. of Renewa.le Ma.eria.s 2019年第3期7卷 289-300页

作者： noureddine Ba.ka.Ma.el Ben Ticha.Wa.a.Ha.da. Moha.ed Fa.ouk Mhenni University of Mona.tir Faculty of Sciences of MonastirResearch Unity of Applied Chemistry and Environment5000 MonastirTunisia Na.iona. Engineering School of Mona.tir 5019 MonastirTunisia Higher Institute of Technologica. Studies 5070Ksar HellalMonastirTunisia

a.rylic fibres a.e highly crysta.line a.d non-pola. polymers,which ma.es their dyeing a.very difficult step tha. poses rea. technica. *** order to overcome this concern,it is intended in this pa.er to modify a.rylic fibers by different methods na.ely ca.ionisa.ion using the Crosscolor DRT then a.idoxima.ion using hydroxyla.ine hydrochloride a.d a.monium *** resulted sa.ples were dyed then with the bio-colora.t extra.ted from gra.e *** effect of the pretrea.ment on fibers fine structure using X-ra. diffra.tion a.d the sca.ning electron microscope(SEM)ima.es a.d its correla.ion with the colour strength of the dyed fa.rics wa. *** dyeing pa.a.eters,such a. dye ba.h pH a.d tempera.ure on the performa.ces of this dyeing process were *** dyeing qua.ities a.d new sha.es va.ying from brown to grey a.d da.k green ha.e been obta.ned following process optimiza.ion,morda.ting a.d modifica.ion of a.rylic fibers by the technique of ca.ionisa.ion.

关键词： Modified a.rylic fibers gra.e ma.c bio-colora.t morda.t.

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a.sorption of Disperse Blue SBL dye by synthesized poorly crysta.line hydroxya.a.ite

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Journa. of Environmenta. Sciences 2008年第10期20卷 1268-1272页

作者： Ba.Ka.noureddine QOURZa. Sa.ir a.Sa.Ba.E a.i NOUNa. a.ederra.ma. a.T-ICHOU Yhya Ma.eria.s Photoca.a.ysis a.d Environment Tea. Depa.tment of Chemistry Fa.ulty of Sciences a.a.ir.BP: 8106 Ha. Da.hla.a.a.ir 80006 Morocco. La.ora.ory of Environmenta. Sciences Technology High School.BP.227 Sa.-Mdina.11000 Morocco

The present study ha. been underta.en to eva.ua.e the a.sorption in ba.ch mode of a.disperse dye (Disperse Blue SBL) by poorly crysta.line hydroxya.a.ite synthesized by coprecipita.ion between Ca.NO3)2a.d (NH4)2HPO4 rea.ents in a.ueous solution a. room tempera.ure. The a.sorption experiments were ca.ried out to investiga.e the fa.tors tha. influence the dye upta.e by the a.sorbent, such a. the conta.t time under a.ita.ion, a.sorbent dosa.e, initia. dye concentra.ion, solution tempera.ure, a.d pH. The experimenta. results show tha. the percenta.e of dye remova. increa.es with increa.ing the a.ount of a.sorbent, until the tota. discolora.ion. The a.sorption isotherms follow the model of La.gmuir with a.high a.sorption ca.a.ity. The a.sorption wa. pH a.d tempera.ure dependent.

关键词： hydroxya.a.ite Disperse Blue SBL a.sorption isotherm entha.py of a.sorption

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Study a.d Design of a.Medium Ca.iber Shell ——Multifunctiona. a.munition with Sha.ed Cha.ge Jet a.d Fra.menta.ion Effect

Study and Design of A Medium Caliber Shell ——Multifunction...

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作者： Medjra. noureddine 南京理工大学

学位级别：硕士

为研究典型多功能战斗部作用性能,分别采用数值模拟、理论分析和实验手段研究了战斗部参数对射流形成、射流侵彻及破片形成的影响规律,给出了典型聚能装药结构射流成型结果及侵彻性能,确定了优选后的聚能装药结构参数,并开展了射流侵彻... 详细信息

为研究典型多功能战斗部作用性能,分别采用数值模拟、理论分析和实验手段研究了战斗部参数对射流形成、射流侵彻及破片形成的影响规律,给出了典型聚能装药结构射流成型结果及侵彻性能,确定了优选后的聚能装药结构参数,并开展了射流侵彻性能实验进行验证。以破甲、杀伤双功能战斗部为基础,开展了刻槽参数、热处理硬度等对破片形成结果影响规律数值模拟计算,确定了优化后的刻槽弹体参数。本文研究的主要内容如下:(1)聚能射流形成的数值模拟与理论分析聚能装药形成射流影响因素较多,如装药类型、装药结构、药型罩结构、材料及起爆方式等。本文主要从药型罩结构入手分析药型罩结构参数对射流形成的影响规律,主要选择了不同的顶角(36°,42°,48°,56°)和厚度(1.2mm、2mm)进行研究。研究工作可分为两部分:一部分工作为采是用a.TODYN(?)软件对射流的成型规律进行系统的数值模拟研究;另一部分为基于Birkhoff聚能射流成型理论分析计算了射流的成型结果计算。数值模拟和理论模型分析计算结果表明:锥角为36°、厚度为1.2mm的药性罩结构可以获得较好的射流形态。(2)聚能射流侵彻能力的数值模拟与理论分析在a.TODYN(?)中对五种不同锥角和厚度的药型罩形成射流对钢靶的侵彻性能进行数值模拟,获得了侵彻过程中射流速度、动能衰减变化规律。同时基于Birkhoff射流侵彻理论对射流侵彻深度进行计算分析,理论计算结果与数值模拟结果吻合较好。同时也对比了不同结构药型罩聚能射流的侵彻威力,结果表明锥角为36°、厚度为1.2mm的药性罩结构可以获得较好的侵彻结果。(3)聚能装药侵彻钢靶作用性能试验研究以前述仿真及数值模拟所获取的聚能装药结构为基础,开展了药型罩锥角为42°和厚度为1.2 mm的聚能装药进行了侵彻实验,得到了侵彻钢靶深度。实验结果与数值模拟结果吻合较好,证明了本文所建立的数值模拟方法及理论模型的正确性。(4)自然破片和预控破片的数值模拟研究在a.TODYN(?)中采用三维建模的方法,对采用三种不同硬度(HRC 20,32,36)壳体的自然破片和预控破片形成进行研究。通过数值模拟,对成形过程中的自然破片和预控破片质量、速度和数量进行分析。数值模拟结果与理论结果一致,表明预控破片可以提供更好的破碎性能。

关键词：聚能装药药性罩药型罩厚度射流侵彻预控破片

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Experimenta. study of hea. tra.sfer coefficient with recta.gula. ba.fle fin of sola. a.r hea.er

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Frontiers in Energy 2014年第2期8卷 160-172页

作者： Foued CHa.a.E Nesrine Ha.Ra. noureddine MOUMMI Mecha.ica. Depa.tment a.d Mecha.ica. La.ora.ory University of Biskra Biskra 07000 Algeria

This pa.er presents a. experimenta. a.a.ysis of a.single pa.s sola. a.r collector with, a.d without using ba.fle fin. The hea. tra.sfer coefficient between the a.sorber pla.e a.d a.r ca. be considera.ly increa.ed by using a.tificia. roughness on the bottom pla.e a.d under the a.sorber pla.e of a.sola. a.r hea.er duct. a. experimenta. study ha. been conducted to investiga.e the effect of roughness a.d opera.ing pa.a.eters on hea. tra.sfer. The investiga.ion ha. covered the ra.ge of Reynolds number Re from 1259 to 2517 depending on types of the configura.ion of the sola. collectors. Ba.ed on the experimenta. da.a. va.ues of Nusselt number Nu ha.e been determined for different va.ues of configura.ions a.d opera.ing pa.a.eters. To determine the enha.cement in hea. tra.sfer a.d increment in therma. efficiency, the va.ues of Nusselt ha.e been smooth duct under simila. flow compa.ed with those of conditions.

关键词： Nusselt number flow ra.e hea. tra.sfer hea. tra.sfer coefficient therma. efficiency forced convection

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a.SUFFICIENT CONDITION OF a.POLYNOMIa. FISH POPULa.ION SYSTEM TO BE STa.LE

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Interna.iona. Journa. of Modeling, Simula.ion, a.d Scientific Computing 2012年第3期3卷 109-117页

作者： YOUNES LOUa.Ta.SI EL HOUSSINE EL Ma.OUDI noureddine ELa.a.I La.ora.oire d’a.toma.ique et Informa.ique Industrielle Ecole Moha.ma.ia.d’ing′enieurs a.enue Ibnsina.765 Agdal RabatMaroc La.ora.oire de Recherche en Economie de l’Energie Environnement et Ressources D′epartement d’Economie University Caddy AyyadMarrakechMaroc La.ora.oire d’a.toma.ique et Informa.ique Industrielle Ecole Moha.ma.ia.d’ing′enieurs a.enue Ibnsina 765Agdal RabatMaroc

In this pa.er,we use Lya.unov a.proa.h to study the sta.ility of a. exploited fish popula.ion *** model considered is structured in n a.e cla.ses a.d includes a.nonlinea. polynomia. stock-recruitment *** ca.dida.e functions is investiga.ed a.d sufficient conditions for globa. a.ymptotic sta.ility of the studied polynomia. system a.e proposed to a.low computa.iona. *** results obta.ned extend our previous study focusing on the solution to the sa.e problem solved using other tools of control *** a.va.ta.e of the proposed a.proa.h is tha. the derived conditions proving the sta.ility of the studied systems ca. be presented a. in inequa.ity in genera. a.d fea.ibility *** obta.ned results a.e tested by numerica. exa.ples.

关键词： Popula.ion dyna.ics continuous structured model ecosystem sta.iliza.ion polynomia. system Lya.unov a.proa.h

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Photoresponse a.d H2 ga. sensing properties of highly oriented a. a.d a./Sb doped ZnO thin films

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Progress in Na.ura. Science:Ma.eria.s Interna.iona. 2013年第6期23卷 519-523页

作者： Ha.na.e Benelma.ja. Boubekeur Boudine a.ssa.Keffous noureddine Ga.ouze La.ora.oire de Physico-Chimie des Semi-Conducteurs Departement de PhysiqueFaculte des Sciences ExactesUniversite Mentouri-Route Ain Elbey La.ora.oire de Crista.logra.hie Departement de PhysiqueFaculte des Sciences ExactesUniversite Mentouri-Route Ain Elbey Silicon Technology Development Unit

ZnO:a. a.d ZnO:a./Sb thin films ha.e been prepa.ed a.d *** thin films were deposited on Si substra.es by the sol-gel *** structura.,optica. a.d electrica. properties of ZnO films ha.e been investiga.ed by spectrophotometry,ellipsometry,X-ra. diffra.tion a.d current-volta.e *** is found tha. the films exhibit wurtzite structure with a.highly c-a.is orienta.ion perpendicula. to the surfa.e of the substra.e,a.high reflectivity in the infra.ed region a.d a.response to ***,it ha. been found tha. Si/（ZnO:a./Sb）/a. photodiode is promising in photoconduction device while Si/（ZnO:a.）/a. ca. be used a. ga. sensor responding to the low H2concentra.ions.

关键词： Zinc oxide Co-doping Thin films Ga. sensing Photoresponse

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In situ(α-a._2O_3+ZrB_2)/a. composites with network distribution fa.rica.ed by rea.tion hot pressing

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Interna.iona. Journa. of Minera.s,Meta.lurgy a.d Ma.eria.s 2015年第10期22卷 1092-1100页

作者： El Oua.id Mokhna.he Gui-song Wa.g Lin Geng Ka.eendra. Ba.a.ubra.a.ia. a.delkha.ek Henniche noureddine Ra.da.i School of Ma.eria.s Science a.d Engineering Harbin Institute of Technology Polymer Ma.eria.s Resea.ch Center Harbin Engineering University

In situ（α-a.2O3+ZrB2）/a. composites with network distribution were fa.rica.ed using low-energy ba.l milling a.d rea.tion hot pressing. Differentia. therma. a.a.ysis（DTa. wa. used to study the rea.tion mecha.isms in the a.–Zr O2–B system. X-ra. diffra.tion（XRD） a.d sca.ning electron microscopy（SEM） in conjunction with energy-dispersive X-ra. spectroscopy（EDX） were used to investiga.e the composite pha.es, morphology, a.d microstructure of the composites. The effect of ma.rix network size on the microstructure a.d mecha.ica. properties wa. investiga.ed. The results show tha. the optimum sintering pa.a.eters to complete rea.tions in the a.–Zr O2–B system a.e 850°C a.d 60 min. In situ-synthesized α-a.2O3 a.d Zr B2 pa.ticles a.e dispersed uniformly a.ound a. pa.ticles, forming a.network microstructure; the dia.eters of the α-a.2O3 a.d Zr B2 pa.ticles a.e a.proxima.ely 1–3 μm. When the size of a. powder increa.es from 60–110 μm to 150–300 μm, the overa.l surfa.e conta.t between a. powders a.d rea.ta.ts decrea.es, thereby increa.ing the loca. volume fra.tion of reinforcements from 12% to 21%. This increa.e of the loca. volume lea.s to a.significa.t increa.e in microha.dness of the in situ（α-a.2O3–Zr B2）/a. composites from Hv 163 to Hv 251.

关键词： meta. ma.rix composites network distribution sinte

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Sensor Fa.lt Detection, Isola.ion a.d Reconstruction Using Nonlinea. Principa. Component a.a.ysis

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Interna.iona. Journa. of a.toma.ion a.d computing 2007年第2期4卷 149-155页

作者： Moha.ed-Fa.uzi Ha.ka. Sa.a. Djelel noureddine Doghma.e Moha.ed Benoua.et Depa.tement d'Elecronique Faculté des Sciences de l'IngénieurUniversité Badji Mokhtar-AnnabaBP. 12Annaba 23000Algeria

Sta.e reconstruction a.proa.h is very useful for sensor fa.lt isola.ion, reconstruction of fa.lty mea.urement a.d the determina.ion of the number of components reta.ned in the principa. components a.a.ysis （PCa. model. a. extension of this a.proa.h ba.ed on a.Nonlinea. PCa.（NLPCa. model is described in this pa.er. The NLPCa.model is obta.ned using five la.er neura. network. a.simula.ion exa.ple is given to show the performa.ces of the proposed a.proa.h.

关键词： Fa.lt detection a.d isola.ion reconstruction nonlinea. PCa.(NLPCa. neura. networks.

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