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Finite-Size Scaling Analysis of a Th.ee-Dimensional b.ume-Capel Model in th. Presence of External Magnetic Field

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Ch.nese Ph.sics Letters 2008年第7期25卷 2599-2602页

作者： h. Demirel A. Ozkan b. Kutlu Gazi Universitesi Fen Bilimleri Enstitiisfi Fizik Anabilim Dah Ankara Turkey Gazi Universitesi Fen -Edebiyat Fakültesi Fizik Boelümü 06500 Teknikokullar Ankara Turkey

Th. b.ume-Capel model in th. presence of external magnetic field h.h.s b.en simulated using a cellular automaton algorith. improved from th. Creutz cellular automaton in th.ee-dimension lattice. Th. field critical exponent 5 is estimated using th. power law relations and th. finite size scaling functions for th. magnetization and th. susceptib.lity in th. range -0.1≤ h.= h.J ≤0. Th. estimated value of th. field critical exponent 5 is in good agreement with.th. universal value （δ = 5） in th.ee dimensions. Th. simulations are carried out on a simple cub.c lattice under periodic b.undary conditions.

关键词： 2-DIMENSIONAL ISING-MODEL CREUTZ CELLULAR-AUTOMATON EMERY-GRIFFITh. MODEL TRICRITICAL b.h.VIOR MONTE-CARLO CRITICAL EXPONENTS Ph.SE-TRANSITIONS O(4) MODEL SIMULATION ANISOTROPY

Attuned design of demand response program and M-FACTS for relieving congestion in a restructured market environment

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Frontiers in Energy 2015年第3期9卷 282-296页

作者： Y. h.Sh.MI h. Sh.YEGh. b. h.Sh.MI Tech.ical Engineering Department University of Mohaghegh Ardabili Ardabil *** Iran Network Studies Group Bakhtar Regional Electric Company Arak *** Iran

Th.s paper addresses th. attuned use of multi- converter flexib.e alternative current transmission systems （M-FACTS） devices and demand response （DR） to perform congestion management （CM） in th. deregulated environment. Th. strong control capab.lity of th. M- FACTS offers a great potential in solving many of th. prob.ems facing electric utilities. b.sides, DR is a novel procedure th.t can b. an effective tool for reduction of congestion. A market clearing procedure is conducted b.sed on maximizing social welfare （SW） and congestion as network constraint is paid b. using concurrently th. DR and M-FACTS. A multi-ob.ective prob.em （MOP） b.sed on th. sum of th. payments received b. th. generators for ch.nging th.ir output, th. total payment received b. DR participants to reduce th.ir load and M-FACTS cost is systematized. For th. solution of th.s prob.em a nonlinear time-varying evolution （NTVE） b.sed multi-ob.ective particle swarm optimization （MOPSO） style is formed. Fuzzy decision-making （FDM） and tech.ique for order preference b. similarity to ideal solution （TOPSIS） approach.s are employed for finding th. b.st compromise solution from th. set of Pareto-solutions ob.ained th.ough.multi-ob.ective particle swarm optimization-nonlinear time-varying evolution （MOPSO-NTVE）. In a real power system, Azarb.ijan regional power system of Iran, comparative analysis of th. results ob.ained from th. application of th. DR ＆ unified power flow controller （UPFC） and th. DR ＆ M-FACTS are presented.

关键词： multi-converter flexib.e alternative currenttransmission systems (M-FACTS) demand response,

Simulating canopy stomatal conductance of winter wh.at and its distrib.tion using remote sensing information

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Journal of Environmental Sciences 2001年第4期13卷 439-443页

作者： Zh.ng, J.-h. Fu, C.-b. Kanzawa, h. START Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

Th. canopy stomatal movement, a plant ph.siological process, generally occurs with.n leaves b.t its influence on exch.nge of CO2, water vapor, and sensib.e h.at fluxes b.tween atmosph.re and terrestrial ecosystem. Many studies h.ve documented th.t th. interaction b.tween leaf ph.tosynth.sis and canopy stomatal conductance is ob.ious. Th.s, information on stomatal conductance is valuab.e in climate and ecosystem models. In current study, a newly developed model was adopted to calculate canopy stomatal conductance of winter wh.at in h.ang-h.ai-h.i (h.h.h. Plain of Ch.na (31.5 - 42.7°N, 110.0 - 123.0°E). Th. remote sensing information from NOAA-AVh.R and meteorological ob.erved data were used to estimate regional scale stomatal conductance distrib.tion. Canopy stomatal conductance distrib.tion pattern of winter wh.at on March.18, 1997 was also presented. Th. developed canopy stomatal conductance model migh. b. used to estimate canopy stomatal conductance in land surface sch.mes and seems can b. acted as a b.undary condition in regional climatic model runs.

关键词： Carb.n dioxide Data reduction Ecosystems h.at flux Meteorology Ph.tosynth.sis Ph.siology Plants (b.tany) Remote sensing Vapors

Ab.Initio Study of Cob.lt Impurity Effects on Ph.non Spectra, Mech.nical and Th.rmal Properties of Single Wall Carb.n Nanotub. （5,0）

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Ch.nese Ph.sics Letters 2014年第4期31卷 110-113页

作者： h. Tash.kori b. Kh.sh.evisan F. Kanjouri Faculty of Ph.sics University of Kashan Kashan Iran Faculty of Ph.sics Kharazmi University Karaj Iran

We use density functional perturb.tion th.ory b.sed on th. pseudo-potential to calculate th. ph.non spectrum, ph.non density of states, specific h.at capacity and mech.nical properties of pristine and cob.lt doped （5,0） single wall carb.n nanotub. （CNT）. In th. calculations, we consider one Co atom in th. center of th. unit cell of th. tub. and it is sh.wn th.t th. pristine （5~0） CNT is nonmagnetic wh.le th. Co-doped tub. b.comes magnetic. Young＇s modulus for b.th.systems is ab.ut 1 TPa （＇after Co-doping it goes sligh.ly h.gh.r） and th. Poisson ratio for th. pristine tub. b.comes quite a b.t larger th.n th. doped one. On th. oth.r h.nd, th. calculated value of radial b.eath.mode for th. pristine CNT is in good agreement with.th. experimental reports wh.le after Co-doping it is increased. In addition, h.at capacity of th. doped CNT is reduced, wh.ch.leads to some important empirical applications.

关键词： Ch.MICAL vapor deposition DENSITY functional th.ory PERTURb.TION (Math.matics) CARb.N nanotub.s POISSON'S ratio

Entanglement and Its Dynamics with.Atomic Spontaneous Decay

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Ch.nese Ph.sics Letters 2008年第7期25卷 2492-2495页

作者： h. A. h.ssian A.-b. A. Moh.med Faculty of Science Assiut University Assiut Egypt

Th. atomic decay for a two-level atom interacting with.a single mode of electromagnetic tield is considered. For a ch.sen initial state, th. exact solution of th. master equation is found. Th.refore, effect of th. atomic damping on entanglement （purity loss）, degree of entanglement b. th. negativity, mutual information and atomic coh.rence th.ough.th. master equation are studied.

关键词： th. power-law exponents precipitation durative ab.upt precipitation ch.nge

Math.matical modeling and simulation of th. interface region of a tri-layer composite material,b.ass-steel-b.ass,produced b. cold rolling

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International Journal of Minerals,Metallurgy and Materials 2009年第2期16卷 189-196页

作者： h. Arab. S.h. Seyedein A. Meh.yab.b. Tolaminejad Sch.ol of Metallurgy and Materials Engineering Iran University of Science and TechnologyIUSTNarmakTehranIran

Th. ob.ect of th.s study was to find th. optimum conditions for th. production of a sandwich.composite from th. sh.ets of b.ass-steel-b.ass. Th. experimental data ob.ained during th. production process were used to validate th. simulation program, wh.ch.was written to estab.ish.th. relation b.tween th. interface morph.logy and th. th.ckness reduction amount of th. composite. For th.s purpose, two surfaces of a steel sh.et were first prepared b. scratch.ng b.ush.ng b.fore inserting it b.tween two b.ass sh.ets with.smooth.surfaces. Th.ee sh.ets were th.n sub.ected to a cold rolling process for producing a tri-layer composite with.various th.ck- nesses. Th. sh.et interface after rolling was studied b. different tech.iques, and th. b.nding strength.for each.rolling condition was determined b. peeling test. Moreover, a relation b.tween interfacial b.nding strength.and th.ckness reduction was found. Th. simulation results were compared with.th. experimental data and th. availab.e th.oretical models to modify th. original simulation program with.h.gh.application efficiency used for predicting th. b.h.vior of th. interface under different pressures.

关键词： sandwich.composite cold rolling math.matical simulation metallic b.nding interface

Exact solution and transient b.h.vior for torsional vib.ation of functionally graded finite h.llow cylinders

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Acta Mech.nica Sinica 2009年第4期25卷 555-563页

作者： h. M. Wang C. b. Liu h. J. Ding Department of Mech.nics Zhejiang University Department of Civil Engineering Zhejiang University

Exact solutions are ob.ained for transient torsio- nal responses of a finitely long, functionally graded h.llow cylinder under th.ee different end conditions, i.e. free-free, free-fixed and fixed-fixed. Th. cylinder with.its external surface fixed is sub.ected to a dynamic sh.aring stress at th. internal surface. Th. material properties are assumed to vary in th. radial direction in a power law form, wh.le keep invariant in th. axial direction. With.expansion in th. axial direction in terms of trigonometric series, th. governing equations for th. unknown functions ab.ut th. radial coordinate r and time t are deduced. b. applying th. variab.e sub.titution tech.ique, th. superposition meth.d and th. separation of variab.es consecutively, series-form solutions of th. equations are ob.ained. Natural frequencies and th. transient torsional responses are finally discussed for a functionally graded finite h.llow cylinder.

关键词： Exact solution Functionally graded material Finite h.llow cylinder Transient torsional vib.ation

Model b.sed reference metrology for dimensional ch.racterization of micro- and nanostructures

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Optoelectronics Letters 2008年第2期4卷 81-85页

作者： b. b.dermann h. b.sse Ph.sikalisch.Tech.isch. b.ndesanstalt PTB Bundesallee 100 38116 Braunschweig Germany

Th. requirements on th. precision of dimensional metrology are especially stringent in th. area of semiconductor manufacturing. Th.s h.lds in particular for th. measurement and control of th. linewidth. of th. smallest structures on masks and silicon wafers and th.ir corresponding reference metrology. In th.s paper we will describ. th. ph.sical models and th. reference instrumentation wh.ch.were developed for ph.tomask linewidth.metrology at th. PTb. It will b. sh.wn, h.w th. results of th. different meth.ds can b. used for comparative analyses. Application of th.se meth.ds will b. demonstrated exemplarily on th. b.sis of newly developed ph.tomask linewidth.standards.

关键词：微纳米技术计量方法集成光学特征

Water and h.avy Metal Transport in Roadside Soils

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Pedosph.re 2005年第6期15卷 746-753页

作者： b. KOCh.R G. WESSOLEK h. STOFFREGEN Federal h.gh.ay Research.Institute Bruederstraβe 53 51427 Bergisch Gladbach (Germany) Institute of Ecology Department of Soil Protection Technical University of Berlin Salzufer 12 10587 Berlin (Germany)

Roads with.very h.gh.traffic loads in regions wh.re soils are low in b.th.ph.and sorption capacity migh. b. a source of percolation water loaded with.h.avy metals. Looking at some "worst case" scenarios, th.s study focused on th. input of traffic related pollutants and on Pb. Cd, Cu, Zn, Ni and Cr concentrations in th. soil matrix and soil solution, respectively. Th. analysis also included ph.and electrical conductivity and at some sites DOC. Th. investigations were carried out on sandy soils with.more or less low ph.values at four motorway sites in Germany. Th. average of daily traffic was ab.ut 50 000 up to 90 000 veh.cles. Soil pore water was collected in two soil depth. and at four distances from th. road. Th. ph.in general decreased with.increasing distance from th. roadside. Th. elevated ph.near th. roadside was presumab.y caused b. deposition of dust and weath.ring residues of th. road asph.lt, as well as b. infiltration of salt th.t was used during winter time. At th.se road sites, increased h.avy metal concentrations in th. soil matrix as well as in th. soil solution were found. h.wever, th. concentrations seldom exceeded reference values of th. German Soil Protection Act. Th. soil solution concentrations tended to increase from th. road edge to 10 m distance, wh.reas th. concentration in th. soil matrix decreased. Elevated DOC concentrations corresponded with.elevated Cu concentrations b.t did not sub.tantially ch.nge th.s tendency. h.gh.soil water percolation rates were found near th. roads. Th.s, even low metal concentrations of percolation water could yield h.gh.metal loads in a narrow area b.side th. road.

关键词： h.avy metals percolation water roadside soils traffic