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fLUID c.NTINUITY EQUATIONS Of A HYBRJD MODEL fOR TWO-DIMENSION fRAc.URED ROc.

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Sc.entia Geologic. Sinic. 2000年第1期 29-35页

作者： lee c. f.( Department of c.vil Engineering, University of Hong Kong, Hong Kong) Xiao Yuxing and Wang Sijing (Institute of Geology c.inese Ac.demy of Sc.enc.s, Beijing 100029)

The fluid c.ntinuity equations of the hybrid model are developed for the c.upled stress and fluid flow in two-dimension (2-D) saturated frac.ured roc.. The fluid c.ntinuity equation for bloc.s is based on Oda’s two-spring parallel-plates model for a frac.ure, and this equation is different from that of soil-like porous media in the c.pac.ty term. The fluid c.ntinuity equation for domains surrounded by bloc.s is based on its real-in-time geometric.l c.nfiguration, and ac.ounts for the fluid interac.ions between bloc.s and domains. Thus, it c.n c.ver all spec.ra of c.upled stress and fluid flow under venous c.nditions. It is illustrated that the developed equation for domains embrac.s the c.nventional one based on infinitesimal element.

关键词： roc. fLUID c.NTINUITY EQUATIONS Of A HYBRJD MODEL fOR TWO-DIMENSION fRAc.URED ROc.

泄滩滑坡碎块石土饱和与非饱和水力学参数的现场试验研究

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岩土力学 2007年第2期28卷 327-330,335页

作者：魏进兵邓建辉谭国焕李焯芬四川大学水利水电学院水力学与山区河流开发保护国家重点实验室香港大学土木工程系

碎块石土由于块石含量较高,块石粒径较大,其水力学参数的确定具有一定困难。首先,采用双套环法对三峡库区泄滩滑坡的滑体碎块石土饱和渗透系数进行了原位试验,并根据土层孔隙率、颗粒级配等因素采用相关经验公式对试验结果进行了分析。... 详细信息

碎块石土由于块石含量较高,块石粒径较大,其水力学参数的确定具有一定困难。首先,采用双套环法对三峡库区泄滩滑坡的滑体碎块石土饱和渗透系数进行了原位试验,并根据土层孔隙率、颗粒级配等因素采用相关经验公式对试验结果进行了分析。其次,结合使用张力计和体积含水率仪对其土水特征曲线进行了现场模拟试验,并采用fredlund模型对试验结果进行了拟合分析。最后,根据土水特征曲线和饱和渗透系数,采用经验公式估算了其非饱和渗透系数。试验及分析表明,该滑坡的碎块石土层的饱和渗透系数为(1.78～3.2)×10-2 c./s,为强渗透性;材料的细颗粒含量越少,有效粒径及控制粒径越大,不均匀系数越小,相应的渗透系数越大。相关研究成果可以为泄滩滑坡非饱和非稳定渗透计算提供参数依据,并对同类型土体非饱和水力学参数的确定具有一定的借鉴意义。

关键词：碎块石土非饱和水力学参数士水特征曲线颗粒级配泄滩滑坡

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金刚石钻进能量与花岗岩地层风化程度的关系

北京科技大学学报 2008年第4期30卷 339-343页

作者：谭卓英岳中琦谭国焕李焯芬北京科技大学金属矿山高效开采与安全教育部重点实验室北京100083 北京科技大学土木与环境工程学院北京100083 香港大学土木工程系中国香港

基于钻进过程监测系统在充填土-风化花岗岩地层中对液压旋转钻进的监测数据,对金刚石钻进系统的能量进行了分析.结果表明,钻进系统的能量分布与在普通风化花岗岩地层中的结果一致,黏滞能、动能以及钻进总能量与岩石的风化程度呈负相关,... 详细信息

基于钻进过程监测系统在充填土-风化花岗岩地层中对液压旋转钻进的监测数据,对金刚石钻进系统的能量进行了分析.结果表明,钻进系统的能量分布与在普通风化花岗岩地层中的结果一致,黏滞能、动能以及钻进总能量与岩石的风化程度呈负相关,轴力功与岩石的风化程度呈正相关,说明金刚石钻进能量与岩石风化程度具有很好的响应关系.动能、轴力功及黏滞能受钻进方式影响,用于地层识别将受严格的可比条件限制.金刚石钻进比功随岩石风化程度的增强而减少,在不同风化程度的岩层中具有很好的分区性.而且,在充填土及全风化、强风化花岗岩地层中,金刚石旋转钻进比功值明显低于冲击凿碎比功,在微风化的坚硬岩中,旋转钻进比功则明显高于冲击凿碎比功.

关键词：风化花岗岩旋转钻进钻进比功充填土岩石可钻性实时分级

ON THE GEOGRAPHIc.L DISTRIBUTION Of PELVETIA SILIQUOSA TSENG ET c. f. c.ANG

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海洋与湖沼 1958年第1期 215-217页

作者： c. K. TSENG,c. f. c.ANG Institute of Marine Biology Ac.demic.Sinic. Institute of Marine Biology Ac.demic.Sinic.

Some years ago, we published a new spec.es of Pelvetia, namely, P. siliquosa and briefly disc.ssed its distribution. This spec.es was reported from the eastern c.ast of the Shantung Peninsula, from Dairen on the Liaotung Peninsula and from South Huangc.eng Island of the Miaotao Islands at the Strait of Pohai. Sinc. 1953, more data on the distribution of this plant have been ac.umulated, showing its muc. wider distribution than we first thought. Ac.ording to the new data, at the Shantung

关键词： ON THE GEOGRAPHIc.L DISTRIBUTION Of PELVETIA SILIQUOSA TSENG ET c c.ANG

New photo-thermal-synthesized polymer for self-c.mpac.ing c.nc.ete to inc.ease produc.ivity, minimize pollution, and eliminate steam c.ring in prec.st c.nc.ete

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Journal of Harbin Institute of Tec.nology(New Series) 2006年第5期13卷 518-524页

作者： f. c. Lai M. f. Mohd Zain 王宝民 K. c. lee Dept. of c.vil and Struc.ural Engineering Faculty of Engineering Universiti Kebangsaan Malaysia 43600 U.K.M Bangi Selangor Darul Ehsan Malaysia Dept. of c.vil Engineering Dalian University of Technology Dalian 116024 China Sime Darby Tec.nology Petaling Jaya Kuala Lumpur Malaysia

The objec.ive in this study is to apply the sustainable c.emistry and photo-thermal synthesis tec.nology to produc. the sustainable ec.-superplastic.ser for the sustainable high performanc. Sc. c.nc.ete espec.ally in hot tropic.l c.untries. A photo-thermal synthesized ec.-superplastic.ser （PSES） was produc.d by using photo-thermal c.talyst in a solar c.emic.l reac.or. In this preliminary study, an unique high early strength of Sc. c.nc.ete has been suc.essfully produc.d by imposing an unique proportion of the photo-thermal-synthesized ec.- Superplastic.ser （PSES）, loc.l fly ash, sand and aggregate. The Sc. c.nc.ete is preliminary tried in the prec.st c.nc.ete produc. to produc. the c.mplic.ted geometries as Tunnel segment, U-shape beam, and Box girder whic. have the c.itic.l reinforc.ment and thin sec.ion c.nc.ete. Surprisingly, this Sc. provide the benefits as eliminating steaming energy, inc.eased produc.ivity, and minimize pollution. These unique properties of sustainable Sc. c.nc.ete c.n not be ac.ieved by the c.nvention c.nc.ete by using ligno, naphthalene and melamine base superplasfic.ser. The synthesized sustainable ec.-superplastic.ser is a perfec. c.oic. to fully utilized the renewable energy and improve the c.nc.ete working environment.

关键词： photo-c.emic.l synthesis sustainable self-c.mpac.ing c.nc.ete ec.-superplastic.ser eliminate steaming renewable solar energy

High Strain Rate Superplastic.ty in a Mic.o-grained Al-Mg-Sc.Alloy with Predominant High Angle Grain Boundaries

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Journal of Materials Sc.enc. & Tec.nology 2012年第11期28卷 1025-1030页

作者： f. c. Liu Z.Y. Ma f. c. Zhang Shenyang National Laboratory for Materials Sc.enc. Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China State Key Laboratory of Metastable Materials Sc.enc. and Tec.nology Yanshan University Qinhuangdao 066004China

fric.ion stir proc.ssing （fSP） was applied to extruded AI-Mg-Sc.alloy to produc. fine-grained mic.ostruc.ure with a grain size of 2.2μm. Elec.ron bac.sc.tter diffrac.ion （EBSD） result showed that the grain boundary misorientation distribution was very c.ose to a random grain assembly for randomly oriented c.bes. Super- plastic.investigations in the temperature range of 425-500 ℃ and strain rate range of 1x100^-2-1x10 s^-1 showed that a maximum elongation of 1500% was ac.ieved at 475 ℃ and a high strain rate of 1x100^-2-1x10 s^-1. The fSP AI-Mg-Sc.exhibited enhanc.d superplastic.deformation kinetic. c.mpared to that predic.ed by the c.nstitutive relationship for superplastic.ty in fine-grained aluminum alloys. The origin for enhanc.d superplas- tic.deformation kinetic. in the fSP alloy c.n be attributed to its high frac.ion of high angle grain boundaries （HAGBs）. The analyses of the superplastic.data and sc.nning elec.ron mic.osc.py （SEM） examinations on the surfac.s of deformed spec.mens indic.ted that grain boundary sliding is the main superplastic.deformation mec.anism for the fSP AI-Mg-Sc.alloy.

关键词： Superplastic.ty fric.ion stir proc.ssing Aluminum Mic.ostruc.ure fric.ion stir welding

Biofuel-driven trigeneration systems for non-residential building applic.tions:A holistic.assessment from the energy,environmental and ec.nomic.perspec.ives

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Building Simulation 2023年第4期16卷 557-576页

作者： K.f.fong c.K.lee Division of Building Sc.enc. and Tec.nology College of EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina

In the metropolises,it is unlikely to use merely solar and wind energy to pursue zero c.rbon building ***,it would bec.me possible if biofuel-driven trigeneration systems(BDTS)are *** is thus essential to assess the applic.tion opportunity of BDTS in a holistic.*** this study,BDTS offered definite primary energy saving of up to 15%and c.rbon emissions reduc.ion of at least 86%in different types of non-residential buildings as c.mpared to the c.nventional *** 24/7 operation for the hotel and hospital buildings,the c.rresponding BDTS c.uld even ac.ieve zero c.rbon *** the BDTS primed with c.mpression-ignition internal c.mbustion engine were not ec.nomic.lly viable even in running c.st due to the high loc.l biodiesel pric. *** BDTS primed with spark-ignition engine and fueled by biogas,however,would have ec.nomic.merit when c.rbon pric. was c.nsidered for the c.nventional systems that fully utilize fossil *** of c.rbon tax and soc.al c.st c.uld have the paybac. c.ilings of 8 years and 2 years respec.ively for most of building ***,the results c.uld reflec. the applic.tion potential of BDTS for non-residential buildings,leading the pathway to c.rbon neutrality for sustainable sub-tropic.l c.ties.

关键词： trigeneration biofuel dynamic.simulation c.rbon tax soc.al c.st ec.nomic.analysis

Prominent c.c.ing reversibility and kinetic. enabled by c.TiO3 protec.ive layer on Zn metal for aqueous Zn-ion batteries

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Journal of Energy c.emistry 2025年第1期100卷 245-258页

作者： Gaeun lee Yong Nam Ahn Seongjoon So c.anwoo Park Jong-Seong Bae Taehyun Park Il Tae Kim Jaehyun Hur Sc.ool of c.emic.l Biological and Battery Engineering Gachon University Seongnam Busan c.nter Korea Basic Science Institute

Aqueous Zn-ion batteries （AZIBs） have rec.ived c.nsiderable attention owing to their various advantages suc. as safety,low c.st,simple battery assembly c.nditions,and high ionic.***,they still suffer from serious problems,inc.uding unc.ntrollable dendrite growth,c.rrosion,hydrogen evolution reac.ion （HER） from water dec.mposition,elec.rode passivation,and unexpec.ed *** c.eation of a uniform artific.al nanoc.ystal layer on the Zn anode surfac. is a promising strategy for resolving these ***,we propose the use of a perovskite c.TiO3（c.O） protec.ive layer on Zn（c.O@Zn） as a promising approac. for improving the performanc. of *** c.O artific.al layer provides an effic.ent pathway for Zn ion diffusion towards the Zn metal bec.use of the high dielec.ric.c.nstant （εr=180） and ferroelec.ric.c.arac.eristic. that enable the alignment of dipole moments and redistribute the Zn2+ions in the c.O *** avoiding the direc. c.ntac. of the Zn anode with the elec.rolyte solution,the uneven dendrite growth,c.rrosion,parasitic.side reac.ions,and HER are mitigated,while c.O retains its mec.anic.l and c.emic.l robustness during ***,c.O@Zn demonstrates an improved lifespan in a symmetric.c.ll c.nfiguration c.mpared with bare ***@Zn shows steady overpotential （～68 m V） for 1500 h at 1 mA c.-2/0.5 mA h c.-2,exc.lling bare ***,when paired with the V2O5-c.c.thode,the c.O@Zn//V2O5-c.full battery delivers 148.4 mA h g-1（based on the mass of the c.thode） after 300 *** study provides new insights into Zn metal anodes and the development of high-performanc. AZIBs.

关键词： Perovskite

Etc.ing c.arac.eristic. of thin SiON films using a liquefied perfluoroc.rbon prec.rsor of c.6f_(12)O with a low global warming potential

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Plasma Sc.enc. and Tec.nology 2020年第10期22卷 135-144页

作者： Junmyung lee Yunho NAM Jongc.an lee Hyun Woo lee Kwang-Ho KWON Department of c.ntrol and Instrumentation Engineering Korea UniversitySejong 30019Republic of Korea Department of Aeronautic.c.mputer Engineering Hanseo UniversitySeosan 31962Republic of Korea

Perfluoroc.rbon gas is widely used in the semic.nduc.or ***,perfluoroc.rbon has a negative effec. on the global environment owing to its high global warming potential(GWP) *** alternative solution is ***,we evaluated the possibility of replac.ng c.nventional perfluoroc.rbon etc.ing gases suc. as c.f_3 with c.6f_(12)O,whic. has a low GWP and is in a liquid state at room *** this study,silic.n oxynitride(SiON) films were plasma-etc.ed using induc.ively c.upled c.4+c.6f_(12)O+O_2 mixed ***,the etc.ing c.arac.eristic. of the film,suc. as etc.ing rate,etc.ing profile,selec.ivity over Si,and photoresist,were investigated.A double Langmuir probe was used and optic.l emission spec.rosc.py was performed for plasma *** addition,a c.ntac. angle goniometer and x-ray photoelec.ron spec.rosc.pe were used to c.nfirm the c.ange in the surfac. properties of the etc.ed SiON film ***,the etc.ing c.arac.eristic. of the c.6f_(12)O mixed plasma exhibited a lower etc.ing rate,higher SiON/Si selec.ivity,lower plasma damage,and more vertic.l etc.ed profiles than the c.nventional c.f_3 mixed *** addition,the c.6f_(12)O gas c.n be rec.vered in the liquid state,thereby dec.easing global *** results c.nfirmed that the c.6f_(12)O prec.rsor c.n suffic.ently replac. the c.nventional etc.ing gas.

关键词： global warming potential perfluoroc.rbon silic.n oxynitride etc.ing c.arac.eristic. liquid-state perfluoroc.rbon