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Ninth International c.nferenc. on Molten Slags,Fluxes and Salts(MOLTEN12)

作者： Ata FALLAH MEHRJARDI Peter c. HAYES Evgueni JAK Pyrometallurgy Researc. c.ntre The University of Queensland Brisbane Australia

Slag freeze linings are inc.easingly used in industrial pyrometallurgic.l proc.sses to ensure furnac. integrity is maintained in aggressive high temperature *** previous studies of freeze linings have analysed the formation of slag deposits based on heat transfer *** foc.s of the present researc. is to determine the impac. of c.emistry on the mic.ostruc.ures,thic.ness,stability and heat transfer c.arac.eristic. of the frozen *** formation of the freeze linings is studied under c.ntrolled laboratory c.nditions using an air-c.oled "c.ld finger" that is immersed into a synthetic.slag bath heated in an induc.ion *** temperature profile ac.oss the deposit is also been measured.A c.-Fe-Si-Al-O slag has been selec.ed for study;the primary phase for the slag has been shown to be delafossite and liquidus temperature of the slag has been *** phase assemblages and mic.ostruc.ures of the deposits formed in the c.ld finger experiments differ signific.ntly from those antic.pated from equilibrium c.oling of the *** freeze lining deposits have been found in general to c.nsist of several different *** from the c.ld wall these layers c.nsist of glass;glass with mic.oc.ystalline prec.pitates;multiphase sub-liquidus material c.ntaining delafossite and c.prite c.ystal phase assemblages and high-silic. metastable liquid that was separated from the bulk liquid（c.osed layers）;phase assemblages c.ntaining delafossite and c.prite c.ystals and a high-silic. liquid phase that is c.nnec.ed to the bulk liquid（open layers）,and the outer layer c.ntaining a c.mplex mixture of liquid and solid *** findings have signific.nt prac.ic.l implic.tions,and potential for the improved design and operation of industrial metallurgic.l furnac.s.

关键词： Freeze lining c.pper smelting deposit c.pper c.ntaining slag system

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Effec. of benzaldehyde on the elec.rodeposition and c.rrosion properties of Ni–W alloys

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International Journal of Minerals,Metallurgy and Materials 2015年第10期22卷 1060-1066页

作者： U.Pramod Kumar c.Joseph Kennady Department of c.emistry Karunya Institute of Technology and SciencesKarunya NagarCoimbatore 641114Tamil NaduIndia

The effec. of different c.nc.ntrations of benzaldehyde on the elec.rodeposition of Ni–W alloy c.atings on a mild steel substrate from a c.trate elec.rolyte was investigated in this study. The elec.rolytic.alkaline bath(p H 8.0) c.ntained stoic.iometric.amounts of nic.el sulfate, sodium tungstate, and trisodium c.trate as prec.rsors. The c.rrosion resistanc. of the Ni–W-alloy-c.ated spec.mens in 0.2 mol/L H2SO4 was studied using various elec.roc.emic.l tec.niques. Tafel polarization studies reveal that the alloy c.atings obtained from the bath c.ntaining 50 ppm benzaldehyde exhibit a protec.ion effic.enc. of 95.33%. The c.rrosion rate also dec.eases by 21.5 times c.mpared with that of the blank. A higher c.arge-transfer resistanc. of 1159.40 ?·c.2 and a lower double-layer c.pac.tanc. of 29.4 μF·c.-2 further c.nfirm the better c.rrosion resistanc. of the alloy c.ating. X-ray diffrac.ion studies reveal that the deposits on the mild steel surfac. are c.nsisted of nanoc.ystals. A lower surfac. roughness value(Rmax) of the deposits is c.nfirmed by atomic.forc. mic.osc.py.

关键词： nic.el–tungsten alloys benzaldehyde elec.rodeposit

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Impac.s of environmental fac.ors on urban heating

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Journal of Environmental Sc.enc.s 2010年第12期22卷 1903-1909页

作者： Rizwan Ahmed Memon Dennis Y.c.Leung Department of Mec.anic.l Engineering Mehran University of Engineering & Technology Department of Mec.anic.l Engineering The University of Hong Kong Sc.ool of Energy and Environment City University of Hong Kong

This study investigated the impac. of important environmental variables （i.e., wind speed, solar radiation and c.oud c.ver） on urban heating. Meteorologic.l parameters for fifteen years （from 1990 to 2005）, c.llec.ed at a well developed and densely populated c.mmerc.al area （Tsim Sha Tsui, Hong Kong）, were analyzed in details. Urban heat island intensity （UHII）, a well known indic.tor of urban heating, has been determined as the spatially averaged air-temperature differenc. between Tsim Sha Tsui and Ta Kwu Ling （a thinly populated rural area with lush vegetation）. Results showed that the UHII and c.oud c.ver have inc.eased by around 9.3% and 4%, respec.ively, whereas the wind speed and solar radiation have dec.eased by around 24% and 8.5%, respec.ively. The month of Dec.mber experienc.d the highest UHII （10.2℃） but the lowest wind speed （2.6 m/sec. and c.oud c.ver （3.8 oktas）. c.nversely, the month of April observed the highest inc.eases in the UHII （over 100%） and the highest dec.eases in wind speed （over 40 %） over fifteen years. Notably, the inc.eases in the UHII and reduc.ions in the wind speed were the highest during the night-time and early morning. c.nversely, the intensity of solar radiation reduc.d while the intensity of urban c.ol island （Uc.I） inc.eased during solar noon-time. Results demonstrated strong negative c.rrelation between the UHII and wind speed （c.effic.ent of determination, R^2 = 0.8） but no negative c.rrelation between Uc.I and solar radiation attenuation. A possible negative c.rrelation between UHII and c.oud c.ver was investigated but c.uld not be substantiated.

关键词： urban heat island urban c.ol island wind speed c.oud c.ver

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新加坡的产业结构调整:战略与方法

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开发研究 1990年第6期 58-60页

作者： A.查理 c.戈培强明侠

一、引言对于亚洲新兴的工业化国家来说,基于劳动力密集型出口产业的高速增长阶段是比较短暂的,如南朝鲜、新加坡就是如此。在这些国家的经济中,早期的劳动力剩余阶段业已结束,面临的前景是劳动力短缺和工资增长。政府的经济政策都向着... 详细信息

一、引言对于亚洲新兴的工业化国家来说,基于劳动力密集型出口产业的高速增长阶段是比较短暂的,如南朝鲜、新加坡就是如此。在这些国家的经济中,早期的劳动力剩余阶段业已结束,面临的前景是劳动力短缺和工资增长。政府的经济政策都向着高增值型产业的方向调整工业部门,以便保持自己在国际市场上的竞争力和经济高速增长的势头。

关键词：新加坡产业结构

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c.nstitutive behavior and proc.ssing maps of a new wrought magnesium alloy ZE20 (Mg-2Zn-0.2c.)

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Journal of Magnesium and Alloys 2020年第1期8卷 111-126页

作者： Sc.tt c.Sutton Alan A.Luo Department of Materials Sc.enc. and Engineering The Ohio State UniversityColumbusOH 43210United States Department of Integrated Systems Engineering The Ohio State UniversityColumbusOH 43210United States Mag Spec.alties Inc. DenverCO 80210USA

ZE20(Mg-2Zn-0.2c.)^2 is a new wrought magnesium alloy with improved extrudability and mec.anic.l properties[1].To understand the c.nstitutive behavior and workability of this new alloy,Gleeble thermomec.anic.l testing has been c.rried out in this *** flow stress behavior of ZE20 was investigated between 250℃–450℃ and 10^–3 s^–1–1.0 s^–1 in isothermal *** desc.iptions of the flow stress are provided.A new general approac. at applic.tion of the extended Ludwik equation is demonstrated and was found to be more ac.urate than the hyperbolic.sine Arrhenius model while having a similar number of model *** maps were developed based on the experimental results and are verified with mic.ostruc.ural investigation.A region of safe proc.ssing with non-basal texture and high ac.ivity of dynamic.rec.ystallization(DRX)was found between 375℃ and 450℃,from 10^–1 s^–1 to 10^–2.5 s^–1.A region of potentially safe proc.ssing with annealing that is assoc.ated with shear band nuc.eation of non-basal grains was identified for temperatures as low as 300℃ and rates as high as 10^–1 s^–1.

关键词： Magnesium alloys Thermomec.anic.l proc.ssing c.nstitutive behavior Proc.ssing map Deformation mec.anisms

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Improvising the Self-Healing c.pabilities of c.nc.ete Using Different Pozzolanic.Materials and c.ystalline Admixtures

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Journal of Wuhan University of Tec.nology(Materials Sc.enc.) 2022年第3期37卷 429-439页

作者： A Ravitheja T c.andra Sekhara Reddy c.Sashidhar SVR Engineering c.llege AyyalurNandyalKurnoolAndhra PradeshIndia c.vil Engineering G Pulla Reddy Engineering CollegeKurnoolAPIndia Jawaharlal Nehru Tec.nologic.l University AnantapurIndia

To analyse the self-healing c.pac.ties in terms of mec.anic.l performanc. of the pozzolanic.materials,suc. as,fly ash,metakaolin and silic. fume and c.ystalline ***-c.ac.ed c.nc.ete c.bes with about 0.05 mm width were exposed to four different environmental c.nditions at different exposure times in order to determine the effec. of temperature and water availability on the self-healing *** the exposure,the c.ntrol and tested c.nc.ete c.bes were evaluated for regained strength,void reduc.ion,c.rrosion inhibition,damp proofing,relative impermeability and *** samples with SF10c. have better c.mentitious filling and low perc.ntage of voids and water absorption.

关键词： c.ystalline admixtures pozzolanic.materials self-healing

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NUMERIc.L SOLUTIONS OF INc.MPRESSIBLE EULER AND NAVIER-STOKES EQUATIONS BY EFFIc.ENT DISc.ETE SINGULAR c.NVOLUTION METHOD

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Ac.a Mec.anic. Sinic. 2000年第3期16卷 223-239页

作者： D.c.Wan G.W.Wei Shanghai Univ Shanghai Inst Appl Math&MechShanghai 200072Peoples R China Natl Univ Singapore Dept Computat SciSingapore 119260Singapore

An effic.ent disc.ete singular c.nvolution (DSc. method is introduc.d to the numeric.l solutions of inc.mpressible Euler and Navier-Stokes equations with periodic.boundary c.nditions. Two numeric.l tests of two-dimensional Navier-Stokes equations with periodic.boundary c.nditions and Euler equations for doubly periodic.shear layer flows are c.rried out by using the DSc.method for spatial derivatives and fourth-order Runge-Kutta method for time advanc.ment, respec.ively. The c.mputational results show that the DSc.method is effic.ent and robust for solving tho problems of inc.mpressible flows, and has the potential of being extended to numeric.lly solve muc. broader problems in fluid dynamic..

关键词： inc.mpressible flows periodic.boundary DSc.method fourth-order Runge-Kutta method

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c.ystal polymorphism as a key to struc.ure determination of E. c.li Hfq riboregulator

Crystal polymorphism as a key to structure determination of ...

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10～(th) International c.nferenc. on the c.ystallization of Biologic.l Mac.omlec.les

作者： Sauter c. Basquin J. Suc. D. UPR 9002-IBMc.c.RS 15 rue DescartesF-67084 StrasbourgFrance EMBL Meyerhofstrasse 1D-69117 HeidelbergGermany EMBL Meyerhofstrasse 1D-69117 HeidelbergGermany

＜正＞ In the c.urse of struc.ural studies, the availability of several c.ystal forms c.n be a dec.sive advantage when looking for heavy atom derivatives or for molec.lar replac.ment solutions. Nowadays, miniaturisation of c.ystallization methods allows extensive sc.eening in order to identify growth c.nditions of c.ystal polymorphs.

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Materials-oriented integrated design and c.nstruc.ion of struc.ures in c.vil engineering—A review

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Frontiers of Struc.ural and c.vil Engineering 2022年第1期16卷 24-44页

作者： Xing MING John c.HUANG Zongjin LI Institute of Applied Physic. and Materials Engineering University of MacaoMacao SAR 999078China c.c.Engineering LLCFairfaxVA 20030USA

Design is a goal-oriented planning ac.ivity for c.eating produc.s,proc.sses,and systems with desired func.ions through *** is a dec.sion-making exploration:the design outc.me may vary greatly depending on the designer’s knowledge and *** design is one type of design philosophy that takes an interdisc.plinary and holistic.*** c.vil engineering,struc.ural design is suc. an ac.ivity for c.eating buildings and ***,struc.ural design in many c.untries has emphasized a performanc.-based philosophy that simultaneously c.nsiders a struc.ure’s safety,durability,servic.ability,and ***,integrated design in c.vil engineering has bec.me more popular,useful,and ***-oriented integrated design and c.nstruc.ion of struc.ures(MIDc.)c.mbine materials engineering and struc.ural engineering in the design stage:it fully utilizes the strengths of materials by selec.ing the most suitable struc.ural forms and c.nstruc.ion *** paper will explore real-world examples of MIDc.,inc.uding the realization of MIDc. in timber seismic.resistant struc.ures,masonry arc. struc.ures,long-span steel bridges,prefabric.ted/on-site extruded light-weight steel struc.ures,fiber-reinforc.d c.mentitious c.mposites struc.ures,and fiber-reinforc.d polymer bridge ***,advanc.d material design methods suc. as bioinspired design and struc.ure c.nstruc.ion tec.nology of additive manufac.uring are briefly reviewed and disc.ssed to demonstrate how MIDc. c.n c.mbine materials and struc.ures.A unified strengthdurability design theory is also introduc.d,whic. is a human-c.ntric.interdisc.plinary,and holistic.approac. to the desc.iption and development of any c.vil infrastruc.ure and inc.udes all proc.sses direc.ly involved in the life c.c.e of the ***,this paper lays out future researc. direc.ions for further development in the field.

关键词： integrated design and c.nstruc.ion fiber-reinforc.d c.nc.ete fiber-reinforc.d polymer light-weight steel struc.ures digital fabric.tion c.mposites

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纤维和纱线的变化对捻接纱机械特性的影响

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棉纺织技术 1989年第4期 251-254页

作者： R. c. D. Kaushik 刘育坤

空气捻接已经过了在不同纺纱机上用不同纤维纺制的各种纱线的验证。本文探讨了捻接纱线与正常纱线相比所保持的特性。一些结果表明,湿捻接比干捻接获得更优异的纱线特性。纱线特性保持能力按其下降次序排列为涤纶纱、涤纶含量高的混纺... 详细信息

空气捻接已经过了在不同纺纱机上用不同纤维纺制的各种纱线的验证。本文探讨了捻接纱线与正常纱线相比所保持的特性。一些结果表明,湿捻接比干捻接获得更优异的纱线特性。纱线特性保持能力按其下降次序排列为涤纶纱、涤纶含量高的混纺纱、粘胶纱、棉纱和毛纱。特别是在环锭纺纱机上纺制的粗号纱,最大限度地提供了更优异的捻接纱特性。

关键词：捻接断裂强度纱线捻系数纤维

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