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3. vir.ual r.constr.ction of the p.eistocene cheetah skull fr.m the Tangshan, Nanjing, china

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p.ogr.ss in Natur.l Science:Mater.als Inter.1} 2007年第1期17卷 74-79页

作者： DONG Wei, HOU Xinwen, LIU Jinyi, FANG Yingsan, JIN Changzhu and ZHU Qizhi ( institute of Ver.ebr.te p.leontology and p.leoanthr.p.logy, chinese academy of sciences, beijing 100044, {3. State key laboratory of pattern recognition, institute of automation, chinese academy of sciences, beijing 100080, {3. Nanjing p.ovincial Museum, Nanjing 210016, {3. r.diology Dep.r.ment, r.nmin Hosp.tal, p.king Univer.ity, beijing 100044, {3.) [a]institute of Ver.ebr.te p.leontology and p.lecanthr.p.logy Chinese Academy of Sciences Beijing China [b]State key laboratory of pattern {3. Institute of Automation Chinese Academy of Sciences Beijing China [c]Nanjing p.ovincial Museum Nanjing China [d]r.diology Dep.r.ment Renmin Hospital Peking University Beijing China

The develop.ent of comp.ter.tomogr.p.y and image p.ocessing has made it p.ssible to establish vir.ual 3. r.constr.ction and non-invasive dissection of fossil sp.cimens. We used these methods to r.constr.ct a vir.ual 3. skull of a p.eistocene cheetah skull fr.m the Tuozi cave, Tangshan, Nanjing, and vir.ually dissected it for.anatomic studies, and measur.d the volumes of differ.nt p.r.s of the endocr.nium. The endocr.nium of the cheetah skull has showed that its fr.ntal sinus is beehive-like, the fr.ntal lobe of cer.br. is r.latively lar.e but the temp.r.l lobe is r.latively small, its cer.br.l sulcus and gyr.s ar. mor. comp.icated than those of the domestic cat, similar.to those of the domestic dog, but simp.er.than those of giant p.nda, p.g, cattle and hor.e. The technology of vir.ual 3. r.constr.ction and non-invasive dissection of fossil sp.cimens can extend the mor.0}ological study fr.m the exter.or.to the inter.or. and it can also help.to study fr.gile sp.cimens and vir.ually backup.r.r. and p.ecious sp.cimens.

关键词： CT imaging 3. r.constr.ction cheetah skull ear.y p.eistocene Tangshan Nanjing.

Finer.discr.mination of br.in activation with local multivar.ate distance

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p.ogr.ss in Natur.l Science:Mater.als Inter.1} 2007年第12期17卷 1508-1514页

作者： Zhen Zonglei, Tian Jie and Zhang Hui(Medical Image p.ocessing Gr.up. key laboratory of Comp.ex Systems and Intelligence Science, institute of automation,{3., beijing 100080, china) Medical Image p.ocessing Gr.up Key Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing 100080 China

The or.anization of human br.in function is diver.e on differ.nt sp.tial scales. Var.ous cognitive states ar. always r.p.esented as distinct activity patterns acr.ss the sp.cific br.in r.gion on fine scales. Conventional univar.ate analysis of functional Mr. data seeks to deter.ine how a p.r.icular.cognitive state is encoded in br.in activity by analyzing each voxel sep.r.tely without consider.ng the fine-scale patterns infor.ation contained in the local br.in r.gions. In this p.p.r. a local multivar.ate distance map.ing (LMDM) technique is p.op.sed to detect the br.in activation and to map.the fine-scale br.in activity patterns. LMDM dir.ctly r.p.esents the local br.in activity with the patterns acr.ss multip.e voxels r.ther.than individual voxels, and it emp.oys the multivar.ate distance between differ.nt patterns to discr.minate the br.in state on fine scales. Exp.r.ments with simulated and r.al fMr. data demonstr.te that LMDM technique can dr.matically incr.ase the sensitivity of the detection for.the fine-scale br.in activity patterns which contain the subtle infor.ation of the exp.r.mental conditions.

关键词： functional magnetic r.sonance imaging (fMr.) statistical analysis multivar.ate distance local pattern pattern classification.

EXp.NSION OF STEp.Tr.NSITION Op.r.TOr.OF MULTI-STEp.METHOD AND ITS Ap.LICATIONS (Ⅱ)

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Jour.al of Comp.tational Mathematics 2002年第2期20卷 461-478页

作者： Yi-fa Tang(State key laboratory of Scientific and Engineer.ng Comp.ting, ICMSEC, academy of Mathematics and System {3., chinese academy of sciences, p.O. Box 2719, beijing 100080, china) 中科院数学与系统科学院 LSEC ICMSEC CAS 北京 100080

We give some for.ulae for.calculation of the exp.nsions for.(1) comp.sition of step.tr.nsition op.r.tor. (STO) of any two differ.nce schemes (DS) for.ODE's, (2) inver.e op.r.tor.of STO of any DS, and (3. conjugate op.... 详细信息

关键词： Step.tr.nsition op.r.tor Exp.nsion Comp.sition Inver.e op.r.tor Conjugate op.r.tor.

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High-r.solution p.otofr.gment tr.nslational sp.ctr.- scop. for.the UV p.otodissociation of C_2H_5I

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Science china Chemistr. 2007年第4期50卷 476-482页

作者： BI WeiBin, XU XiLing, HUANG JianGou, XIAO DaoQing & ZHU QiHe beijing national laboratory for.Molecular.{3., State key laboratory of Molecular.r.action Dynamics, institute of Chemistr., chinese academy of sciences, beijing 100080, china 1. beijing national laboratory for.Molecular.{3. State Key Laboratory of Molecular Reaction Dynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

The p.otodissociation of ethyl iodide at 279.71, 281.73. 3.4.02 and 3.4.67 nm has been studied on our.new mini-p.otofr.gment tr.nslational sp.ctr.meter.with a total flight p.th of only 5 cm. Some vibr.-tional p.aks ar. fir.tly r.solved in the TOF sp.ctr. of I*(2p./2) and I(2p.0}2) channels. These vibr.tional p.aks ar. assigned to the excitation states (ν2 = 0, 1, 2,…) of the umbr.lla mode (ν2, 540 cm-1) of the p.otofr.gment C2H5, and the distr.bution of the vibr.tional states is obtained. The dissociation ener.y has been deter.ined to be D0(C-I)=2.3.4 ± 0.03.eV. The ener.y p.r.itioning of the available ener.y (Eavl=ET+Eint=ET+EV,r. calculated fr.m our.exp.r.mental data E int /E avl= 22.1% at 281.73.nm, 22.4% at 3.4.02 nm for.the I* channel, and E int /E avl= 25.2% at 279.71 nm, 25.9% at 3.4.67 nm for.the I channel, seem to be mor. r.liable.

关键词： p.otofr.gment tr.nslational sp.ctr.scop. C_2H_5I p.otodissociation vibr.tional state distr.bution ener.y p.r.itioning dissociation ener.y

Numer.cal exp.or.tion of new featur.s on thr.e-dimensional tr.nsition of a cylinder.wake

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Science china Mathematics 2004年第z1期47卷 69-80页

作者： LING Guocan, XIONG Jun & ZHU KeqinState key laboratory of Nonlinear.Mechanics, institute of Mechanics,{3., beijing 100080, china Dep.r.ment of Engineer.ng Mechanics, Tsinghua Univer.ity, beijing 100084, china chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100080 Peoples R China Tsing Hua Univ Dept Engn Mech Beijing 100084 Peoples R China

The thr.e-dimensional tr.nsition of the wake flow behind a cir.ular.cylinder.is studied in detail by dir.ct numer.cal simulations using 3. incomp.essible N-S equations for.r.ynolds number.r.nging fr.m 200 to 3.0. New featur.s and vor.ex dynamics of the 3. tr.nsition of the wake ar. found and investigated. At r. = 200, the flow pattern is char.cter.zed by mode A instability. However. the sp.nwise char.cter.stic length of the cylinder.deter.ines the tr.nsition featur.s. p.r.icular.y for.the sp.cific sp.nwise char.cter.stic length linear.stable mode may dominate the wake in p.ace of mode A and deter.ine the sp.nwise p.ase differ.nce of the p.imar. vor.ices shedding. At r. = 250 and 3.0 it is found that the str.amwise vor.ices evolve into a new typ. of mode "dual vor.ex p.ir.mode" downstr.am. The str.amwise vor.ex str.ctur.s switch among mode A, mode B and dual vor.ex p.ir.mode fr.m near.wake to downstr.am wake. At r. = 250, an indep.ndent low fr.quency fm in addition to the vor.ex shedding fr.quency fs is identified. Fr.quency coup.ing between fm and fs occur.. These r.sult in the ir.egular.ty of the temp.r.l signals and become a key featur. in the tr.nsition of the wake. Based on the for.ation analysis of the str.amwise vor.icity in the vicinity of cylinder. it is suggested that mode A is caused by the emer.ence of the sp.nwise velocity due to thr.e dimensionality of the incoming flow p.st the cylinder. Ener.y distr.bution on var.ous wave number. and the fr.quency var.ation in the wake ar. also descr.bed.

关键词： cylinder. wake, 3. tr.nsition, Four.er.sp.ctr.l-sp.ctr.l-element method, dir.ct numer.cal simulation (DNS).

r.sear.h of the Gas-solid Flow Char.cter.Based on the DEM Method

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Jour.al of Ther.al Science 2011年第6期20卷 521-526页

作者： Xueyao Wang and Yunhan Xiao r.sear.h Center.for.Clean Ener.y and p.wer.chinese academy of sciences {3. laboratory of Advanced Ener.y and p.wer.chinese academy of sciences (institute of Engineer.ng Ther.op.ysics),beijing,100190,china r.sear.h Center.for.Clean Ener.y and p.wer Chinese Academy of Sciences Beijing China key laboratory of Advanced Ener.y and p.wer Chinese Academy of Sciences (Institute of Engineering Thermophysics) Beijing China

Numer.cal simulation of gas-solid flow behavior. in a r.ctangular.fluidized bed is car.ied out thr.e dimensionally by the discr.te element method (DEM).Euler.method and Lagr.nge method ar. emp.oyed to deal with the gas p.ase and solid p.ase *** collided for.e among p.r.icles,str.king for.e between p.r.icle and wall,dr.g for.e,gr.vity,Magnus lift for.e and Saffman lift for.e ar. consider.d when establishing the mathematic ***-sp.er. model is used to descr.be the collision of *** addition,the Euler.method is also used for.modeling the solid p.ase to comp.r. with the r.sults of *** flow patterns,p.r.icle mean velocities,p.r.icles' diffusion and p.essur. dr.p.of the bed under.typ.cal op.r.ting conditions ar. *** r.sults show that the DEM method can descr.be the detailed infor.ation among p.r.icles,while the Euler.Euler.method cannot cap.ur. the micr.-scale *** matter.which method is used,the diffusion of p.r.icles incr.ases with the incr.ase of gas *** the gather.ng and cr.shing of p.r.icles cannot be simulated,so the ener.y loss of p.r.icles' collision cannot be calculated and the diffusion by using the Euler.Euler.method is *** addition,it is shown by DEM method,with str.ngthening of the car.ying cap.city,mor. and mor. p.r.icles can be schlep.ed up.ar. and the dense susp.nsion up.low pattern can be ***,the r.sults given by the Euler.Euler.method ar. not consistent with the r.al situation.

关键词： DEM gas-solid flow numer.cal simulation

Unsteady Numer.cal Simulation of Hot Str.ak/Blades Inter.ction and Film Cooling

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Jour.al of Ther.al Science 2010年第5期19卷 402-409页

作者： Weilin Yi,Lucheng Ji and Yunhan Xiao r.sear.h Center.for.Ener.y and p.wer.chinese academy of sciences,{3.,china key laboratory of Advanced Ener.y and p.wer.chinese academy of sciences,(institute of Engineer.ng Ther.op.ysics),{3.,china p.O.Box 2706,{3. 100190,china r.sear.h Center.for.Ener.y and p.wer Chinese Academy of Sciences Beijing China key laboratory of Advanced Ener.y and p.wer Chinese Academy of Sciences (Institute of Engineering Thermophysics) Beijing China beijing China

Deep.y r.sear.h on management and ap.lication of hot str.ak is an imp.r.ant way to br.akthr.ugh technique obstacle of aer. engine hot *** method is a useful instr.ment to investigate the cor.elative *** the p.p.r.develop.d indep.ndently thr.e dimensional unsteady p.r.llel comp.tational code-Mp.Tur.o based on For.r.n 90 and Mp. at Linux op.r.ting *** unsteady numer.cal simulation was car.ied out to investigate imp.cts of the factor.,which included cir.umfer.ntial locations of hot str.ak and clocking p.sitions of blade r.ws,on the ther.al envir.nment of a 1+1 counter.r.tating *** r.sults clear.y indicated that clocking p.sitions of hot str.ak/blade r.w and blade r.w/blade r.w had gr.at influence on the time-aver.ged temp.r.tur. distr.bution of the thir. blade ***,it can be effective for.imp.oving ther.al envir.nment of tur.ine to op.imize blade p.r.meter. and clocking *** film cooling layout was designed by the r.p.titious steady simulation based on sour.e ter. *** the flow str.ctur. detail was given by the unsteady simulation.

关键词： hot str.ak tur.ine p.r.llel comp.tation film cooling

An integr.tive estimation model of summer.r.infall-band patterns in china

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p.ogr.ss in Natur.l Science:Mater.als Inter.1} 2007年第3期17卷 280-288页

作者： WEI Fengying (State key laboratory of Sever. Weather. chinese {3. of Meteor.logical sciences, beijing 100081, china) State key laboratory of Sever. Weather Chinese Academy of Meteorological Sciences Beijing 100081 China

Thr.e var.ation indices ar. defined to objectively and quantitatively r.p.esent fluctuations of thr.e r.infall-band patterns in summer. in china for.the p.r.od fr.m 1951 to 2005, and the var.ation featur.s of these indices ar. analyzed on both of inter.ecadal and inter.nnual scales. A new method is p.op.sed to establish an integr.tive estimation model based on the analysis of r.infall-band indices, and the model is ap.lied to air. ocean factor. to estimate their.r.les on var.ations of thr.e r.infall-band patterns on differ.nt time-scales. The tests of estimation effects show that the fluctuations of thr.e r.infall-band patterns ar. comp.sed of var.ations on both significant inter.decadal and inter.nnual scales, of which the inter.nnual var.ation is mainly influenced by the Elnino/Lanina events, the East Asia monsoon and the r.dge locations of subtr.p.cal high p.essur.s in wester. p.cific, while the inter.ecadal var.ation is mainly contr.lled by the p.cific decadal oscillation and inter.ecadal oscillations of the Ar.tic oscillation, ENSO, Nino3.sea sur.ace temp.r.tur. and summer.monsoon. The estimated r.sults fr.m the integr.tive estimation model of r.infall-band patterns suggest that the way of estimation fir.t accor.ing to each time scale of both the inter.ecadal and inter.nnual scales, then estimating with an integr.tion, which is p.op.sed in this p.p.r. has an obvious imp.ovement on that without sep.r.tion of time scales.

关键词： r.infall-band pattern inter.nnual var.ation inter.ecadal var.ation integr.tion estimation model.

INFLUENCE OF CAp.LLAr.TY ON NANO-LITEr.FLOWr.TE MEASUr.MET WITH DISp.ACEMET METHOD

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Jour.al of Hydr.dynamics 2007年第5期19卷 594-600页

作者： GUO Qiang CHENG r.i SILBEr.LI Zhan-hua State key laboratory of Nonlinear.Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China Shanghai institute of Ap.lied Mathematics and Mechanics Shanghai University Shanghai 200072 China

Nanoqiter.flowr.te measur.ments in micr.-tubes with disp.acement method wer. p.r.or.ed and the effect of cap.llar.ty for.e on the accur.cy was investigated thr.ugh lab exp.r.ments and theor.tical analysis in this ar.icle. The exp.r.ments wer. conducted under.the p.essur. dr.p. r.nging fr.m 1 kp. to 10 kp. in a cir.ular.p.p. with a diameter.of 50 p., to give the p.essur.-flowr.te （p.Q） r.lation and ver.fy the ap.licability of the classical Hagen-p.iseuille （Hp. for.ula. The exp.r.mental r.sults showed that ther. existed a discr.p.ncy between the exp.r.mental data and the theor.tical values p.edicted by the Hp.for.ula if the cap.llar. effect was not consider.d, which exceeded obviously the limit of the system er.or. And hence a modified for.ula for.the r.lation, taking the cap.llar. effect into account, was p.esented thr.ugh theor.tical deduction, and after.the Hp.for.ula had been modified the er.or.was p.oved to be less than 3., which was p.r.itted in comp.r.son with the system er.or. It was also concluded that only by eliminating the effect of the cap.llar. for.e in exp.r.ments could the or.ginal Hp.for.ula be emp.oyed to p.edict the p.essur.-flowr.te r.lation in the Hagen-p.iseuille flow in the micr.-tube.

关键词： nano-liter flowr.te measur.ment,Hagen-p.iseuille (Hp. for.ula disp.acement method,cap.llar.ty for.e