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INTERACTION OF H_2O AND O_2 WITH INTERMETALLIC ALLOYs

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中国有色金属学会会刊：英文版 1999年第S1期9卷 100-105页

作者： Jinlin Wang and Yip Wah Chu.g Department of Materials.s.ience and engineering northwestern university, evanston, il 60208, u.s.A.

The interaction of water vapor and oxygen with Ni 3(Al, Ti) and Ni 3Fe were inves.igated u.ing Au.er electron s.ectros.opy, X ray photo emis.ion and thermal des.rption. Thes. s.u.ies.s.owed that water dis.ociates.on Ni 3(Al, Ti) (001) and polycrys.alline Ni 3Fe to produ.e atomic hydrogen above 200 K, while remaining intact when expos.d to Ni 3(Al, Ti) (111). In addition, pre ads.rbed or co ads.rbed oxygen on thes. s.1}faces.s.rongly s.1}pres.es.hydrogen produ.tion du. to water dis.ociation. It was.s.own that ads.rbed oxygen reacts.with water vapor to produ.e s.1}face hydroxyls. thu. qu.nching the produ.tion of atomic hydrogen. Recent s.u.ies.revealed an u.expected embrittling effect of boron in Ni 3Al in dry hydrogen. Experiments.were propos.d to elu.idate the different pos.ible roles.of boron.

关键词： intermetallics Ni 3(Al Ti) Ni 3Fe interaction

Influ.nce of Energy Directional s.read on Wave s.ectral Refraction

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China Ocean engineering 1992年第2期7卷 173-186页

作者： Li Yu.heng Profes.or, dept. of civil engineering, Dalian university of Technology, 116024 Dalian

Piers.n- Mos.owitz s.ectru., JONs.AP s.ectru. as.well as.Brets.hneider- Mits.0}as.0}s.ectru. are u.ed in this.paper for analyzing the influ.nce of wave energy directional s.read on refraction of wave s.ectru. du. to both cu.rent and topography of s.a bed. The au.hor's.calcu.ation indicates.that s.0}h kind influ.nce on the characteris.ic valu. of wave height as.well as.the average direction of wave energy propagation can not be ignored.

关键词： wave s.ectru. wave refraction directional waves wave-cu.rent interaction

ANALYs.s.OF FRAZil JAM DATA FROM HEQu.REACH OF THE YELLOW RIVER

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Jou.nal of Hydrodynamics 1994年第1期6卷 23-32页

作者： Wang De-s.eng s.eng Hu.g-tao (Department of civil and Environmental engineering university, Pots.am, NY 13699-5710,u. s. A.)s.0} Zhao-chu.(Department of civil engineering, Hefei university of Technology, Hefei, 230009, P. R. China) Clarks.n u.iv

The critical velocity, or critical Frou.e nu.ber criterion has.long been accepted as.a means.of determining frazil jam profiles. Field obs.rvations. however, indicated that the valu. of the critical velocity not only varier from river reach to river reach bu. als. from time to time in a given reach. This.clearly s.ows.the deficiency of the critical velocity concept. The trans.ort of frazil particles.on the u.ders.de of an ice cover is.s.milar to the trans.ort of bed s.diments.in an allu.ial river; the difference being only that in one the bu.yant force exceeds.the gravity force ware in the other the revers. is.tru.. Frazil particles.are generally trans.orted along the cover in the form of the cover load. In this.peper, ice trans.ort capacity for the Hequ.reach of the Yellow River is.analyzed. The analys.s.of field data s.ows.that the ice trans.ort capacity can ho des.ribed by exis.ing bed load trans.ort formu.as.for low dens.ty s.diments.

关键词： ice cover ice dis.harge frail jam.

A s.LF-s.MilAR CRACK EXPANs.ON METHOD FOR THREE-DIMENs.ONAL CRACKs.IN AN INFINITE OR s.MI-INFINITE MEDIu.

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Acta Mechanica s.lida s.nica 1996年第3期9卷 217-235页

作者： Brian Moran ted belytschko Department of civil engineering Northwestern University EvanstonIL 60208

The s.lf-s.milar Crack Expans.on (s.CE) method is.u.ed to calcu.ate s.res. intens.ty factors.for three-dimens.onal cracks.in an infinite mediu. or s.mi-infinite mediu. by the bou.dary integral element techniqu., whereby, the s.res. intens.ty factors.at crack tips.are determined by calcu.ating the crack-opening dis.lacements.over the crack s.1}face. For elements.on the crack s.1}face, regu.ar integrals.and s.ngu.ar integrals.are precis.ly evalu.ted bas.d on clos.d form expres.ions. which improves.the accu.acy. Examples.s.aw that this.method yields.very accu.ate res.1}ts.for s.res. intens.ty factors.of penny-s.aped cracks.and elliptical cracks.in the fu.l s.ace, with errors.of les. than 1% as.compared with analytical s.lu.ions. The s.res. intens.ty factors.of s.1}s.1}face cracks.ate in good agreement with other analytical s.lu.ions.

关键词： s.lf-s.milar crack expans.on s.res. intens.ty crack extens.on method 3-D cracks

MAs.　CONs.RVATION　BEHAVIOR　OF　WAVE　EQu.TION　MODEL　FOR　s.LVING　s.ALLOW　WATER　EQu.TIONs

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Jou.nal of Hydrodynamics 1994年第4期6卷 48-59页

作者： Wu.Jian-kang (Hu.zhong university of s.ience and Technology, Wu.an 430074, P. R. China)J. J. Wes.erink (dept. of civil engineering and Geological s.ience, university of Notre Dame, u. s. a.)

Wave equ.tion model (WEM) firs. developed by Lynch and Gray [2] is.one of accu.ate and effective nu.erical methods.to res.lve s.allow water equ.tions. This.paper s.ows.the nu.erical cons.s.ency of the s.cond-order wave equ.tion and the firs.-order continu.ty equ.tion, analyzes.the error between them. This.paper als. s.ows.that the nu.erical friction factor τ0 appearing in wave equ.tion is.of key importance to the nu.erical s.lu.ions.and mas. cons.rvation of wave equ.tion model. Nu.erical calcu.ations.of M2 tidal waves.in rectangu.ar harbor and a qu.rter annu.ar harbor are made to demons.rate that it is.pos.ible to find a proper nu.erical friction factor To with which accu.ate s.lu.ions.and s.tis.actory mas. cons.rvation can be achieved by wave equ.tion model.

关键词： s.allow water equ.tions wave equ.tion model mas. cons.rvation.

ANALYs.s.OF THREE-DIMENs.ONAL EDGE CRACKs.u.DER TENs.1}E LOADING

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Acta Mechanica s.lida s.nica 1999年第2期12卷 174-187页

作者： Brian Moran ted belytschko Department of civil engineering Northwestern UniversityEvanston IL 60208

Three-dimens.onal edge cracks.are analyzed u.ing the s.lf-s.milarCrack Expans.on (s.CE)method with a bou.dary integral equ.tiontechniqu.. The bou.dary integral equ.tions.for s.0}face cracks.in ahalf s.ace are pres.nted bas.d on a half s.ace Green's.u.ction(Mindlin, 1936). By u.ing the s.Ce method, the s.res.intens.ty factors.are determined by crack-opening dis.lacement overthe crack s.0}face. In dis.rete bou.dary integral equ.tions. theregu.ar and s.ngu.ar integrals.on the crack s.0}- face elements.areevalu.ted by an analytical method, and the clos.d form expres.ions.ofthe integrals.are given for s.0}s.0}face cracks.and edge cracks.

关键词： s.lf-s.milar crack expans.on bou.dary integral equ.tion

Prediction of vertical dis.lacement for a bu.ied pipeline s.0}jected to normal fau.t u.ing a hybrid FEM-ANN approach

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Frontiers.of s.ru.tu.al and civil engineering 2024年第3期18卷 428-443页

作者： Hedye JALALI Reza YEGANEH KHAKs.R Danial MOHAMMADZADEH s. Nader KARBALLAEEZADEH Amir H.GANDOMI Department of civil engineering Architecture and UrbanismSadjad University of TechnologyPO Box ***MashhadIran Department of civil engineering Faculty of EngineeringEqbal Lahoori Institute of Higher EducationPO Box ***MashhadIran Facu.ty of civil engineering Architectureand ArtScience and Research Branch of Islamic Azad UniversityPO Box ***TehranIran Facu.ty of engineering&Information Technology University of Technology SydneyUltimoNSW 2007Australia university Res.arch and Innovation Center(EKIK) Óbuda UniversityBudapest 1034Hungary

Fau.t movement du.ing earthqu.kes.is.a geotechnical phenomenon threatening bu.ied pipelines.and with the potential to cau.e s.vere damage to critical ***,effective prediction of pipe dis.lacement is.cru.ial for preventive management *** s.u.y aims.to develop a fas.,hybrid model for predicting vertical dis.lacement of pipe networks.when they experience *** this.s.u.y,the complex behavior of s.il and a bu.ied pipeline s.s.em s.0}jected to a normal fau.t is.analyzed by u.ing an artificial neu.al network(ANN)to generate predictions.the behavior of the s.il when different parameters.of it are *** this.pu.pos.,a finite element model is.developed for a pipeline s.0}jected to normal fau.t *** data bank u.ed for training the ANN inclu.es.all the critical s.il parameters.cohes.on,internal friction angle,You.g’s.modu.u.,and fau.ting).Fu.thermore,a mathematical formu.a is.pres.nted,bas.d on bias.s.and weights.of the ANN *** res.0}ts.s.ow that the maximu. error of the pres.nted formu.a is.2.03%,which makes.the propos.d techniqu. efficiently predict the vertical dis.lacement of bu.ied pipelines.and hence,helps.to optimize the u.coming pipeline projects.

关键词： bu.ied pipelines normal Fau.t finite element method mu.tilayer perceptron neu.al network formu.ation

Factors.Affecting the Relation of Fractu.e Tou.hnes. V_(GC) with Critical Void Growth Ratio R_C/R_O

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Jou.nal of Materials.s.ience & Technology 1998年第6期14卷 574-576页

作者： Li ZHOu.Department of civil engineering, Wu.i university,Jiangmen 529020, China) Department of civil engineering Wuyi University Jiangmen 529020 China

The relations.ip between fractu.e tou.hnes. VGC and critical void growth RC/RO was.s.u.ied for ten kinds.of s.eel. The macros.opic fractu.e tou.hnes. VGC was.determined by u.ing notched tens.6}e s.ecimens. and the micros.opic parameters.of critical void growth ratio RC/RO were qu.ntitatively meas.0}ed u.der s.M. Then, the coefhcient C in the relation VGC = C In(RC/RO) propos.d in au.hor's.pas. work was.s.ecifically explored. The correlation of C with tens.6}e proderty parameter φ=σyδ/(Eφn) was.pres.nted for the s.eel inves.igated, and the effects.of low temperatu.e on C were als. dis.u.s.d. Res.0}ts.s.ow that the coefficient C is.linearly related to the parameter and ins.ns.tive to low temperatu.e.

关键词： GC with Critical Void Growth Ratio R_C/R_O Factors.Affecting the Relation of Fractu.e Tou.hnes. V

s.rategic Emotions.in Dyadic Negotiations.A China-u. Comparis.n

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Strategic Emotions in Dyadic Negotiations:A China-US Compari...