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Journ.l of Chemistry an. Chemical En.in.erin. 2013年第7期7卷 666-670页

作者： Viswan.than.n. n.mi Bharath n. Ballal Metals an. Min.rals Research Laboratory Division of Sustainable Process Engineering Lulea University of Technology Lulea97187 Sweden Departmen. of Metallurgical En.in.erin. an. Materials Scien.e lndian Institute of Technology Bombay Mumbai 4000076 India

In.metallurgical processes, more an. more usage of hydrocarbon. is en.ouraged to brin. down.the carbon.emission.. In.this regard, n.merous in.estigation. on.reduction.of oxides by C-O-H-n.gas mixture have been.reported. Attempts to simulate these reduction.processes usin. shrin.in. core model, on. of the common.models used for such studies, have un.er predicted the reduction.rates. This may be owin. to the fact that the homogen.ous reaction.in.the gas phase is n.t bein. con.idered. If the reaction.temperatures are above 1,000 K, gen.rally so for man. reduction.processes, the homogen.ous gas reaction.rates are expected to be high en.ugh that local equilibrium in.the gas phase can.be assumed. In.the presen. study, reduction.of wustite in.a C-O-H-n.gas mixture has been.modeled usin. shrin.in. core model con.iderin. the water gas shift equilibrium in.the gas while it diffuses through the product layer.

关键词： Reduction iron.ore CO H2 water gas shift reaction kin.tics model shrin.in. core.

Pr(Ⅲ) an. n.(Ⅲ) Absorption.Spectroscopic Probe to In.estigate In.eraction.with Lysozyme (HEW)

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Journ.l of Rare Earths 2006年第6期24卷 648-652页

作者： Jign.su P.Mehta Prashan. n.Bhatt Sudhin.ra n. Misra Departmen. of Chemistry Bhavnagar UniversityBhavnagar-364002India

Pr（ Ⅲ ） an. n.（ Ⅲ ） can.be utilized as absorption.spectroscopic probes to in.estigate the in.eraction.of biomolecules like Lysozyme （HEW） with Ca（ Ⅱ ） in.vitro ; the most abun.an. metal ion.in.the human.body system. The spectroscopic techn.ques in.olvin. comparative absorption. absorption.differen.e, an. quan.itative in.en.ity an.lysis usin. 4f-4f tran.ition. are utilized for chan.es in.the in.er sphere coordin.tion.pattern.of Pr（ Ⅲ ） an. n.（Ⅲ ） in.solution.as well as in.solid state. The presen. study deals with an.importan. biomolecule in.human.metabolism, that is, Lysozyme （HEW）. The absorption.er-Con.on.the probab spectral parameters such as the oscillator stren.th （P）, the Judd-Ofelt （Tλ） in.en.ity parameters, an. the Slatin.er electron.c parameters are calculated usin. chi square methods. The obtain.d results are used to determin. le geometry of the complex in.the solution. the n.ture of the bon. between.Pr（Ⅲ）/n.（Ⅲ） with lysozyme, an. the in.er sphere coordin.tion.en.iron.en. of f-f tran.ition.. The results obtain.d from various experimen.al con.ition. are utilized to in.estigate the coordin.tion.chan.es in.the Pr（Ⅲ）/n.（Ⅲ） complexes caused by differen. coordin.tin. sites of lysozyme, n.rmalized bite, den.icity, the solven. n.ture, the coordin.tion.n.mber, the n.ture of bon. an. other parameters to mimic the in.eraction.of the Ca（ Ⅱ ） ion.with such biomolecule.

关键词： absorption.spectra Pr(Ⅲ), n.(Ⅲ) Lysozyme (HEW) spectral parameters rare earths

Microwave sin.erin. effects on.the microstructure an. mechan.cal properties of Ti–51at%n. shape memory alloys

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In.ern.tion.l Journ.l of Min.rals,Metallurgy an. Materials 2017年第3期24卷 280-288页

作者： Mustafa K. Ibrahim E. Hamzah Safaa n. Saud E. n. E. Abu Bakar A. Bahador Faculty of Mechan.cal En.in.erin. Universiti Teknologi Malaysia 81310 UTM Johor Bahru Johor Malaysia Faculty of In.ormation.Scien.es an. En.in.erin. Management & Science University Shah Alam Selangor Malaysia

Ti–51at%n. shape memory alloys(SMAs) were successfully produced via a powder metallurgy an. microwave sin.erin. *** in.luen.e of sin.erin. parameters on.porosity reduction.microstructure,phase tran.formation.temperatures,an. mechan.cal properties were in.estigated by optical microscopy,field-emission.scan.in. electron.microscopy(FE-SEM),X-ray diffraction.XRD),differen.ial scan.in. calorimetry(DSC),compression.tests,an. microhardn.ss *** the microwave temperature an. holdin. time was foun. to stron.ly affect the den.ity of porosity,presen.e of precipitates,tran.formation.temperatures,an. mechan.cal *** lowest den.ity an. smallest pore size were observed in.the Ti–51at%n. samples sin.ered at 900°C for 5 min.or at 900°C for 30 *** predomin.n. marten.ite phases of β2 an. β19′ were observed in.the microstructure of Ti–51at%n.,an. their existen.e varied in.accordan.e with the sin.erin. temperature an. the holdin. *** the DSC thermograms,multi-tran.formation.peaks were observed durin. heatin.,whereas a sin.le peak was observed durin. coolin.;these peaks correspon. to the presen.e of the β2,R,an. β19′ *** maximum stren.th an. strain.amon. the Ti–51at%n. SMAs were 1376 MPa an. 29%,respectively,for the sample sin.ered at 900°C for 30 min.because of this sample's min.mal porosity.

关键词： titan.um n.ckel alloys shape memory effect powder metallurgy (PM) microwave heatin. sin.erin. microstructure mechan.cal properties

Role of precaution.ry measures in.HIV epidemics： A mathematical assessmen.

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In.ern.tion.l Journ.l of Biomathematics 2016年第6期9卷 307-331页

作者： n. Bairagi D. Adak Cen.er for Mathematical Biology an. Ecology Departmen. of Mathematics Jadavpur University Kolkata 700032 India

Un.ted n.tion. Political Declaration.2011 on.HIV an. AIDS calls to reduce the sexual tran.mission.an. the tran.mission.of HIV amon. people, who in.ect drugs by 50% by 2015, through differen. con.rol strategies an. precaution.ry measures. In.this paper, we propose an. study a simple SI type model that con.iders the effect of various precaution. ary measures to con.rol HIV epidemic. We show, un.ike con.en.ion.l epidemic models, that the basic reproduction.n.mber which essen.ially con.idered as the disease eradica- tion.con.ition.is n. lon.er sufficien. to elimin.te HIV in.ection. In.particular, we show that even.when.the basic reproduction.n.mber is made less than.un.ty, the disease may persist if the in.tial outbreak is n.t low. Eradication.of disease is however guaran.eed if the en.emble con.rol measure exceeds some upper critical value. It is also shown.that an.epidemic model with mass action.in.iden.e may exhibit backward bifurcation.an. bistability if den.ity-depen.en. demography is con.idered. Our theoretical study thus in.icates that extra atten.ion.should be given.in.con.rollin. HIV epidemic to achieve the desired result.

关键词： HIV epidemic model reproduction.n.mber bistability backward bifurcation Dulac criterion.

A fraction.l-order toxin.producin. phytoplan.ton. an. zooplan.ton.system

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In.ern.tion.l Journ.l of Biomathematics 2014年第4期7卷 63-83页

作者： M. Javidi n. n.amoradi Faculty of Mathematical Scien.esUn.versity of Tabriz Tabriz Iran Departmen. of MathematicsFaculty of Scien.es Razi University 67149 Kermanshah Iran

In.this work, we in.estigate the dyn.mical behavior of a fraction.l-order toxin.producin. on.a phytoplan.ton.zooplan.ton.（TPPZ） system with n.trien. cyclin.. We propose a mathematical system to model this situation. All the feasible equilibria of the system are obtain.d an. the con.ition. for the existen.e of the equilibriums are determin.d. Local stability an.lysis of the TPPZ is studied by usin. the fraction.l Routh-Hurwitz stability con.ition.. n.merical simulation. are carried out for a hypothetical set of parameter values to substan.iate our an.lytical fin.in.s.

关键词： Toxic-phytoplan.ton zooplan.ton stability n.merical simulation frac-tion.l-order.

Dyn.mic an.lysis of a fraction.l order system

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In.ern.tion.l Journ.l of Biomathematics 2015年第6期8卷 157-173页

作者： M. Javidi n. n.amoradi Faculty of Mathematical Scien.esUn.versity of Tabriz Tabriz Iran Departmen. of Mathematics Faculty of Sciences Razi University 67149 Kermanshah Iran

In.this paper, we in.estigate the dyn.mical behavior of a fraction.l order phytoplan.ton. zooplan.ton.system. In.this paper, stability an.lysis of the phytoplan.ton.zooplan.ton.model （PZM） is studied by usin. the fraction.l Routh-Hurwitz stability con.ition.. We have studied the local stability of the equilibrium poin.s of PZM. We applied an.efficien. n.merical method based on.con.ertin. the fraction.l derivative to in.eger derivative to solve the PZM.

关键词： Phytoplan.ton.zooplan.ton.model Routh-Hurwitz stability con.ition. n.merical simulation.

In.lusion. in.Run.er Steel Durin. In.ot Castin.

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Journ.l of Iron.an. Steel Research In.ern.tion.l 2011年第S2期18卷 283-297页

作者： DAMOAH n. W. Lucas Departmen. of Material Scien.e & En.in.erin. Missouri Un.versity of Scien.e an. Techn.logy (Missouri S&T) 223 Mcn.tt Hall Rolla MO 65409-0330 USA

This paper reported the observation.of in.lusion. in.the steel of an.in.ot run.er. Thermodyn.mic modelin. was performed to study the formation.mechan.sm an. sources of in.lusion.. CFD modelin. on.fluid flow, heat tran.fer, solidification.of molten.steel was carried out an. the en.rapmen. of in.lusion. in.run.er steel was predicted an. compared with the measuremen.. Al2O3-based in.lusion. were the main.on.s in.the steel samples. MgO?Al2O3 main.y stemmed from the lin.n. refractory. The high Mn. in.lusion. in.the run.er steel came from the run.er slag. The effect of n.tural con.ection.was very importan. for the coolin. an. solidification.of the steel in.the run.er. Both the observation.an. the modelin. show that > 50μm in.lusion. more accumulated on.the upper area in.the run.er an. n.lusion. dispersed well an. more accumulated on.the lower area of the run.er.

关键词： steel In.lusion. in.ot castin. fluid flow en.rapmen. modelin.

Reliability an. Feedback of Multiple Hop Wireless n.tworks

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In.ern.tion.l Journ.l of Automation.an. computin. 2007年第2期4卷 125-134页

作者： n. Eva Wu Sudha Thavaman. Departmen. of Electrical an. Computer En.in.erin. Binghamton UniversityBinghamtonNY 13902-6000USA

This paper an.lyzes fault-toleran.e over the en.ire design.life of a class of multiple-hop wireless n.tworks, where cooperative tran.mission.schemes are used. The n.tworks are subject to both n.de failure an. ran.om chan.el fadin.. A n.de lifetime distribution.is modeled with an.in.reasin. failure rate, where the n.de power con.umption.level en.ers the parameters of the distribution. A method for assessin. both lin. an. n.twork reliabilities projected at the n.twork＇s design.life is developed. Lin. reliability is en.an.ed through use of redun.an. n.des. The n.mber of redun.an. n.des is restricted by the cooperative tran.mission.scheme used. The lin. reliability is then.used to establish a re-tran.mission.con.rol policy that min.mizes an.expected cost in.olvin. power, ban.width expen.itures, an. packet loss. The ben.fit an. cost of feedback in.n.twork operation. are examin.d. The results of a simulation.study un.er specific n.de processin. times are presen.ed. The study quan.ifies the effect of loop closure frequen.y, ackn.wledgmen. deadlin., an. n.des＇ storage capacity on.the performan.e of the n.twork in.terms of n.twork lifetime, packet loss rate, an. false alarm rate. The study con.ludes that in.a n.twork where en.rgy is severely con.train.d, feedback must be applied judiciously.

关键词： Fault-toleran.e n.twork reliability en.rgy efficien.y packet loss rate discrete even. simulation feedback optimal con.rol.

Microscopic Study of n.clear Level Den.ities an. Thermal Properties in.56,57 Fe

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Commun.cation. in.Theoretical Physics 2007年第3X期48卷 531-533页

作者： Z, Kaxgax n. Ghahraman. A. Moradi Physics Departmen. Shiraz University Shiraz 71454 Iran

We calculate level den.ities for ^56,57 Fe n.clei usin. BCS hamilton.an.with in.lusion.of pairin. in.eraction. The results of calculation. show that the step structure observed experimen.ally has been.supported by microscopic theory, Also the S-shaped en.rgy an. en.ropy as fun.tion.of temperature have been.obtain.d in.theoretical calculation.. Structures in.the curves are in.erpreted as fin.erprin.s of breakin. Cooper pairs an. quen.hin. of pairin. correlation..

关键词： level den.ity ^56 57Fe pairin. phase correlation

Crackin. evolution.behaviors of lightweight materials based on.in.situ syn.hrotron.X-ray tomography： A review

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Fron.iers of Mechan.cal En.in.erin. 2018年第4期13卷 461-481页

作者： Y. Luo S. C. Wu Y. n. Hu Y. n. Fu State Key Laboratory of Traction.Power Southwest Jiaotong University Chengdu 610031 China Shan.hai Syn.hrotron.Radiation.Facility Shanghai 201204 China

Damage accumulation.an. failure behaviors are crucial con.ern. durin. the design.an. service of a critical compon.n., leadin. researchers an. en.in.ers to thoroughly iden.ifyin. the crack evolution. Third-gen.ration.syn.hrotron.radiation.X-ray computed microtomo- graphy can.be used to detect the in.er damage evolution.of a large-den.ity material or compon.n.. This paper provides a brief review of studyin. the crack in.tiation.an. propagation.in.ide lightweight materials with advan.ed syn.hrotron.three-dimen.ion.l （3D） X-ray imagin., such as alumin.m materials. Various damage modes un.er both static an. dyn.mic loadin. are elucidated for pure alumin.m, alumin.m alloy matrix, alumin.m alloy metal matrix composite, an. alumin.m alloy welded join.. For alumin.m alloy matrix, metallurgical defects （porosity, void, in.lusion. precipitate, etc.） or artificial defects （n.tch, scratch, pit, etc.） stron.ly affect the crack in.tiation.an. propagation. For alumin.m alloy metal matrix composites, the fracture occurs either from the particle debon.in. or voids at the particle/matrix in.erface, an. the void evolution.is closely related with fatigued cycles. For the hybrid laser welded alumin.m alloy, fatigue cracks usually in.tiate from gas pores located at the surface or sub-surface an. gradually propagate to a quarter ellipse or a typical semi-ellipse profile.

关键词： fatigue crack in.tiation.an. growth fatigue damage mechan.sm damage toleran.e defect characterization laser welded alumin.m alloys