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Deep lev.ls. trans.ort and THz emis.ion properties.of s.Ge/s. quantum-well s.ructures

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s.ience China(Technological s.iences. 2009年第1期52卷 6-9页

作者： I. v. ANTONOv. M. s. KAGAN E. P. NEUs.ROEv.s. A. s.AGULOv. Ins.itute of s.miconductor Phys.cs Russian Academy of Sciences Ins.itute of Radioengineering and Electronics Russian Academy of Sciences Yakuts. s.ate Univ.rs.ty

Recharging of quantum confinement lev.ls.in s.Ge quantum wells.(QW) was.s.udied by charge deep-lev.l trans.ent s.ectros.opy (Q-DLTs. for s./s.Ge/s. s.ructures.with different Ge contents.in the s.Ge layer. A peak with activ.tion energy v.rying in the range from 0 to 100 mev.in different tempera-ture interv.ls.was.obs.rv.d in Q-DLTs.s.ectra. Activ.tion energies.extracted from Q-DLTs.meas.re-mens.are in good agreement with energies.of quantum confinement lev.ls.in the QW.

关键词： s.Ge quantum wells DLTs s.ectra confinement lev.ls

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Frontiers.of phys.cs 2016年第5期11卷 57-78页

作者： v. R. s.aginyan A. Z. Ms.zane G. s. Japaridze K. G. Popov.v. A. Khodel Peters.urg Nuclear Phys.cs.Ins.itute NRC Kurchatov Institute Gatchina 188300 Russia Clark Atlanta Univ.rs.ty Atlanta GA 30314 USA Komi s.ience Center Ural Division RAS Syktyvkar 167982 Russia Rus.ian Res.arch Centre Kurchatov.Ins.itute Moscow 123182 Russia McDonnell Center for the s.ace s.iences.& Department of Phys.cs Washington University St. Louisa MO 63130 USA

The aim of this.rev.ew paper is.to expos. a new s.ate of matter exhibited by s.rongly correlated Fermi s.s.ems.repres.nted by v.rious.heav.-fermion （HF） metals. two-dimens.onal liquids.like 3He, compounds.with quantum s.in liquids. quas.crys.als. and s.s.ems.with one-dimens.onal quantum s.in liquid. We name thes. v.rious.s.s.ems.HF compounds. s.nce they exhibit the behav.or typical of HF metals. In HF compounds.at zero temperature the unique phas. trans.tion, dubbed throughout as.the fermion condens.tion quantum phas. trans.tion （FCQPT） can occur; this.FCQPT creates.flat bands.which in turn lead to the s.ecific s.ate, known as.the fermion condens.te. Unlimited increas. of the effectiv. mas. of quas.particles.s.gnifies.FCQPT; thes. quas.particles.determine the thermodynamic, trans.ort and relaxation properties.of HF compounds. Our dis.us.ion of numerous.s.lient experimen- tal data within the framework of FCQPT res.lv.s.the mys.ery of the new s.ate of matter. Thus. FCQPT and the fermion condens.tion can be cons.dered as.the univ.rs.l reas.n for the non-Fermi liquid behav.or obs.rv.d in v.rious.HF compounds. We s.ow analytically and us.ng arguments.bas.d completely on the experimental grounds.that thes. s.s.ems.exhibit univ.rs.l s.aling behav.or of their thermodynamic, trans.ort and relaxation properties. Therefore, the quantum phys.cs.of different HF compounds.is.univ.rs.l, and emerges.regardles. of the micros.opic s.ructure of the compounds. This.uniform behav.or allows.us.to v.ew it as.the main characteris.ic of a new s.ate of matter exhibited by HF compounds.

关键词： quantum phas. trans.tion flat bands s.s.ems quantum s.in liquids heav. fermions effects s.aling behav.or new s.ate of matter non-Fermi-liquid s.ates s.rongly correlated electron quas.crys.als thermoelectric and thermomagnetic

FINITE DIFFERENCE METHODs.FOR THE HEAT EQUATION WITH A NONLOCAL BOUNDARY CONDITION

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Journal of Computational Mathematics 2015年第1期33卷 17-32页

作者： v. Thomee A.s. v.s.dev. Murthy Mathematical s.iences Chalmers University of Technology and University of Gothenburg SE-412 96 GSteborg Sweden TIFR Centre for Appl. Math Yelahanka New Town Bangalore India

We cons.der the numerical s.lution by finite difference methods.of the heat equation in one s.ace dimens.on, with a nonlocal integral boundary condition, res.lting from the truncation to a finite interv.l of the problem on a s.mi-infinite interv.l. We firs. analyze the forward Euler method, and then the 0-method for 0 〈 θ ≤ 1, in both cas.s.in maximum-norm, s.owing O（h2 ＋ k） error bounds. where h is.the mes.-width and k the time s.ep. We then giv. an alternativ. analys.s.for the cas. θ= 1/2, the Crank-Nicols.n method, us.ng energy arguments. yielding a O（h2 ＋ k3/2） error bound. s.ecial attention is.giv.n the approximation of the boundary integral operator. Our res.lts.are illus.rated by numerical examples.

关键词： Heat equation Artificial boundary conditions unbounded domains productquadrature.

Beneficiation of an Indian non-coking coal by column flotation

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International Journal of Coal s.ience & Technology 2016年第2期3卷 206-214页

作者： N. v.s.mathi T. v. v.jaya Kumar s. Ratchambigai s. s.bba Rao s. Prabhakar G. Bhas.ar Raju Cs.R-National Metallurgical Laboratory Madras.Centre CSIR Madras Complex Taramani Chennai 600 113 India

Beneficiation of non-coking coal is.gaining ground in India. It not only reduces.the v.lume of inert content to be trans.orted to the power plant and als. lowers.the wear in the boiler hous.s. For s.ecial applications.s.ch as.the fuel for integrated gas.fication combined cycle plant （IGCC）, the as. content in the coal s.ould preferably be below 15 %. Indian coals.are characterized by high inter-grown as. content mainly due to ＇drift origin＇ of Gondwana formation in Permian age. This.warrants.fine grinding of non-coking coal in order to liberate the as. forming minerals.from coal macerals. A non- coking coal s.mple of v.trinite type from India was.ground to 44 ~tm （ds.） and s.bjected to column flotation to improv. its.quality. The non-coking coal analyzing 34.6 % as., 26.2 % v.latile matter, 1.3 % mois.ure and 37.9 % fixed carbon could be upgraded to a concentrate/froth of 14.83 % as. at 72.18 % yield by optimizing collector and frother dos.ges.and flotation column operating parameters. namely, froth depth, s.perficial feed v.locity and s.perficial air v.locity. The concentrate produced by this.proces. is.s.itable as.fuel for IGCC in coal-to-electricity route.

关键词： Non-coking coal Was.ability Beneficiation Column flotation Coal gas.fication

Analys.s.of the s.atis.ical Behav.our of Daily Maximumand Monthly Rainfall Data at New DelhiDuring Mons.on Period

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Adv.nces.in Atmos.heric s.iences 2002年第3期19卷 425-432页

作者： C. v. s.ngh R. s. Adhikari H. P. Garg Centre of Energy s.udies Indian Institute of Technology Hauz Khas 110 016 New Delhi India

A s.atis.ical analys.s.of monthly mean and daily maximum rainfall data at New Delhi during the mon-s.on (June-s.ptember) period 1940-1980 is.pres.nted. It has.been obs.rv.d that a good correlation exis.s.between the monthly and daily maximum rainfall. A linear regres.ion analys.s.of the data is.found to be s.g nificant for all the four months. s.me key s.atis.ical parameters.like the mean v.lues.of Coefficient of v.ri ability (Cv., Relativ. v.riability (Rv. and Percentage Interannual v.riability (PIv. hav. been s.udied and found to be at v.riance. Howev.r, their corres.onding ratios.between mean daily maximum and mean monthly rainfall are s.gnificantly lower.

关键词： Mons.on rainfall Coefficient of v.riability Relativ. v.riability Percentage interannual v.ria-bility

Power coupler kick of the TRIUMF ICM capture cav.ties

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Chines. Phys.cs.C 2011年第6期35卷 590-595页

作者：闫芳 R. E. Laxdal v. Zv.agints.v.Yu. Chao s. Kos.ielniak Ins.itute of High Energy Phys.cs CAS Beijing 100049 China TRIUMF Vancouvcr V6T2A3 Canada

The TRIUMF Injector CryoModule （ICM） adapted two s.perconducting s.ngle cav.ties.as.the capture s.ction for the low injecting energy of 100 kev.electrons. Coupler kick induced beam deflection and projected emittance growth are one of the prime concerns.of the beam s.ability, es.ecially at low energies. In low energy applications. the electron v.locity changes.rapidly ins.de the cav.ty, which makes.the numerical analys.s.much more complicated. The commonly us.d theoretical formulas.of the direct integral or the Panofs.y- Wenzel theorem is.not s.itable for the kick calculation of β 1 electrons. Des.ite that, the abov. mentioned kick calculation method does.’t cons.der injecting electron energy, the beam offs.t due to the coupler kick may not be negligible becaus. of the low injection energy ev.n if the kick is.optimized. Thus.the beam dynamics.code TRACK is.us.d here for the s.mulation of the power coupler kick perturbation. The coupler kick can be compens.ted for by a judicious.choice of the coupler pos.tion in s.cces.iv. cav.ties.from ups.ream to downs.ream. The s.mulation s.ows.that becaus. of the adiabatic damping by the following s.perconducting 9-cell cav.ty, ev.n for the wors. orbit dis.ortion cas. after two capture cav.ties. the kick is.s.ill acceptable at the exit of the ICM after reaching 10 Mev. This.paper pres.nts.the analys.s.of the trans.0}rs. kick and the projected emittance growth induced by the coupler for β 1 electrons. The s.mulated res.lts.of the TRIUMF ICM capture cav.ties.are des.ribed and pres.nted.

关键词： coupler RF kick capture cav.ties β 〈1 electron

Genetic analys.s.of growth and wood v.riations.in Leucaena leucocephala (Lam.) de Wit.

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Journal of Fores.ry Res.arch 2013年第3期24卷 485-493页

作者： E K. Pande A. Kumar s. Rav.chandran s. Naithani v. Kothiyal E B. K. Kis.ore A. Raturi E Gautam s. Dobhal s. s.arma Fores. Res.arch Ins.itute EO. IPE Dehradun 248195 India. Directorate of Rice Res.arch Hyderabad India. Os.ania Univ.rs.ty Hyderabad India

We s.lected 28 populations.of Leucaena leucocephala from different geographical locations.in the s.ates.of Andhra Prades., Tamil Nadu and Oris.a of India on the bas.s.of height and girth at breas. height （GBH）. We ev.luated fiber length, optical dens.ty, wall thicknes., v.s.el element length, v.s.el element diameter, s.ecific grav.ty and lignin of thes. populations.of L. leucocephala in different s.tes. Populations.had s.gnificant v.riations.for all growth, wood and paper parameters. Girth at breas. height （GBH） and s.ecific grav.ty were the mos. important pa- rameters.for heritability and genetic gain, res.ectiv.ly. The minimum heritability was.reported for v.s.el element length and genetic gain for fiber length. The populations.were grouped into s.x clus.ers. clus.er II had maximum number of populations.（14） and clus.ers.Iv.and v. had one population each. GBH contributed maximum of 34.39 % towards.total div.rgence followed by s.ecific grav.ty （14.02%）. An economic technique to produce quality s.ed by es.ablis.ing s.ed orchards.with genetically div.rgent parents.was.s.gges.ed. The hybridization among the populations.s.lected from div.rs. clus.ers.could produce greater heteros.s.needed for higher growth and s.itable wood and paper manu- facturing parameters.

关键词： Leucaena leucocephala wood parameters heritability ge-netic adv.nce s.ed orchards

H_2^+,H_3^+团簇离子在沟道条件下的背散射质子产额测量

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物理学报 2003年第8期52卷 1895-1900页

作者：杨朝文 v. A. Khodyrev.v. s. Kulikaus.as 四川大学物理科学与技术学院原子核科学技术研究所成都610064 莫斯科大学核物理研究所

采用卢瑟福背散射方法 ,测得了每质子能量为 6 5 0kev.H+2 ,H+3团簇离子在s.晶体和沟道条件下的质子背散射能谱 .结果发现 ,由于H+2 ,H+3团簇在晶体中的库仑爆炸和团簇效应 ,H+2 的背散射质子产额大于H+ 的背散射产额 ,而H+3的背散... 详细信息

采用卢瑟福背散射方法 ,测得了每质子能量为 6 5 0kev.H+2 ,H+3团簇离子在s.晶体和沟道条件下的质子背散射能谱 .结果发现 ,由于H+2 ,H+3团簇在晶体中的库仑爆炸和团簇效应 ,H+2 的背散射质子产额大于H+ 的背散射产额 ,而H+3的背散射质子产额又大于H+2 的背散射质子产额 .通过计算 ,分别得到了H+2 ,H+3在和沟道方向的背散射质子产额相对于随机方向背散射产额之比随深度的分布 .

关键词：团簇离子 H2^+ H3^+ 沟道效应质子产额测量库仑爆炸卢瑟福背散射碰撞

s.perconducting magnetic energy s.orage for s.abilizing grid integrated with wind power generation s.s.ems

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Journal of Modern Power s.s.ems.and Clean Energy 2019年第2期7卷 400-411页

作者： Poulomi MUKHERJEE v. v. RAO Applied s.perconductiv.ty Laboratory Cryogenic Engineering Centre Indian Institute of TechnologyKharagpur

Due to the interconnection of v.rious.renewable energies.and adaptiv. technologies. v.ltage quality and frequency s.ability of modern power s.s.ems.are becoming erratic. s.perconducting magnetic energy s.orage(s.Es.,for its.dynamic characteris.ic, is.v.ry efficient for rapid exchange of electrical power with grid during s.all and large dis.urbances.to addres. thos. *** addition,s.Es.plays.an important role in integrating renewable s.urces.s.ch as.wind generators.to power grid by controlling output power of wind plant and improv.ng the s.ability of power *** application of s.Es.in v.rious.power s.s.em operations.depends.on the proper location in the power s.s.em, exact energy and power ratings.and appropriate controllers. In this.paper, an effort is.giv.n to explain s.Es.dev.ce and its.controllability to mitigate the s.ability of power grid integrated with wind power generation s.s.ems.

关键词： Power fluctuation Power quality Low v.ltage ride through s.perconducting magnetic energy s.orage s.perconductors Wind energy