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B_c Meso. Studies

高能物理与核物理 2002年第Z1期26卷 1-10页

作者： CHANG Chao.Hsi (institute o. Theo.etical physics, chinese academy o. sciences, beijing 100080,{3.) Inst. o. Theo.. phys. Chinese Acad. of Sci. Beijing 100080 China

o.r studies o. the meso. Bc arc briefly *** decays o. the meso. Bc to.a p-wave charmo.ium Xc o. hc are repo.ted co.paratively precisely because they are fresh

关键词：高能物理核物理增刊张肇西 B_c Meso. Studies Rev

Mo.eling o. elastic wave pro.agatio. o. a curved free surface using an impro.ed finite-difference algo.ithm

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Science china(physics,Mechanics & Astro.o.y) 2004年第5期47卷 633-648页

作者： WANG Xiuming1,3.& ZHANG Hailan2 1. CSIRo.petro.eum, ARRC, po.Bo. 113., Techno.o.y park, Bentley, WA 6102, Australia 2. institute o. aco.stics, chinese academy o. sciences,{3., china 3. p.esent address: institute o. aco.stics, chinese academy o. sciences,{3., china CSIRo.petro.eum ARRC Bentley Australia institute o. aco.stics Chinese Academy of Sciences Beijing China

Based o. existing direct and imaging metho.s o. a staggered finite-difference scheme, an impro.ed algo.ithm fo. staggered finite-difference is pro.o.ed to.implement rugged to.o.raphic free bo.ndary co.ditio.s. This metho. assumes that the free surface can be implemented with ho.izo.tal and vertical free surface segments and their co.ners; the free surface passes thro.gh the grid po.nts o. shear stress co.po.ents, instead o. the no.mal stress co.po.ents. Imaging is carried o.t fo. stress co.po.ents in bo.h ho.izo.tal and vertical directio.s, thus increasing the accuracy. To.update particle- velo.ities, imaging and updating are first perfo.med in the ho.izo.tal directio., and then in the vertical directio.. The numerical results fo. elastic flat ho.izo.tal free surface with the imaging metho. and tho.e fo. flat free surfaces o. vario.s slo.e angles with the pro.o.ed metho. are co.pared, and are sho.n to.be in go.d agreement. The advantage o. the pro.o.ed metho. is that o.ly the stresses are dealt with in implementing the free surface into.the staggered algo.ithm, which impro.es co.putatio. efficiency.

关键词： elastic wave simulatio., curved free surface, staggered finite-difference, algo.ithm stability.

SUBSpACE SEARCH METHo. Fo. A CLASS o. LEAST SQUARES pRo.LEM

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Jo.rnal o. Co.putatio.al Mathematics 2000年第2期18卷 133-140页

作者： Zi-Luan Wei (institute o. Co.putatio.al Mathematics and Scientific / Engineerin Co.puting, chinese academy o. sciences, p.o. Bo. 2719, beijing 100080,{3.) 中科院计算数学与科学工程计算所北京 100080

p.esents info.matio. o. a study which described a subspace search metho. fo. so.ving a class o. least squares pro.lem. Derivatio. o. the algo.ithm; Co.vergence results; Mo.ificatio. o. algo.ithm and applicatio.s.

关键词： subspace search metho. A class o. least squqres pro.lem co.vergence analysis.

Quasi-Ho.eo.o.phisms and Measures o. Finite Energy Integrals o. Generalized Dirichlet Fo.ms

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Acta Mathematica Sinica,English Series 2000年第2期16卷 325-336页

作者： Wei Sun institute o. Applied Mathematics,chinese academy o. {3.,beijing,100080,p.R.china institute o. Applied Mathematics Chinese Academy of Sciences Beijing 100080 P. R. China

We intro.uce the quasi-ho.eo.o.phisms o. generalized Dirichlet fo.ms and pro.e that any quasi-regular generalized Dirichlet fo.m is quasi-ho.eo.o.phic to.a semi-regular generalized Dirichlet fo.m. Mo.eo.er. we apply this quasi-ho.eo.o.phism metho. to.study the measures o. finite energy integrals o. generalized Dirichlet fo.ms. We sho. that any 1-co.xcessive functio. which is do.inated by a functio. in is asso.iated with a measure o. finite energy integral. Co.sequently, we pro.e that a Bo.el set B is-exceptio.al if and o.ly if μ(B)=0 fo. any measure μ o. finite energy integral.

关键词： Generalized Dirichlet fo.m Quasi-ho.eo.o.phism Measure o. finite energy integral

o.TIMAL MIXED H-p FINITE ELEMENT METHo.S Fo. STo.ES AND No.-NEWTo.IAN FLo.

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Jo.rnal o. Co.putatio.al Mathematics 2001年第1期19卷 67-76页

作者： ping-bing Ming Zho.g-ci Shi (institute o. Co.putatio.al Mathematics, chinese academy o. sciences, beijing 100080,{3.) 中科院计算数学与工程计算数学所北京 100080

p.esents an h -- p finite element metho.s based upo. a mixed variatio.al fo.mulatio. fo. the three-field Sto.es equatio.s and linearized No.-Newto.ian flo.. Co.putatio. o. the algebraic system generated fro. pro.lem H... 详细信息

关键词： mixed hp- finite element metho. no.-Newto.ian flo. stabilizatio. scaled weak B-Binequality

MATHEMATICAL ANALYSIS Fo. QUADRILATERAL Ro.ATED Q_1 ELEMENT Ⅲ: THE EFFECT o. NUMERICAL INTEGRATIo.

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Jo.rnal o. Co.putatio.al Mathematics 2003年第3期21卷 287-294页

作者： ping-bing Ming Zho.g-ci Shi (institute o. Co.putatio.al Mathematics, chinese academy o. sciences, beijing 100080,{3.) institute o. Co.putatio.al Mathematics Chinese Academy of Sciences 北京 100080

This is the third part o. the paper fo. the ro.ated Q1 no.co.fo.ming element o. quadrilateral meshes fo. general seco.d o.der elliptic pro.lems. So.e o.timal numerical fo.mulas are p.esented and analyzed. The no.elty is that it includes a fo.mula with o.ly two.sampling po.nts which excludes even a Q1 uniso.vent set. It is the o.timal numerical integratio. fo.mula o.er a quadrilateral mesh with least sampling po.nts up to.no..

关键词： Quadrilateral ro.ated Q1 element Numerical quadrature.

Special relativity and theo.y o. gravity via maximum symmetry and lo.alizatio.

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Science china Mathematics 2008年第4期51卷 568-603页

作者： GUo.HanYing institute o. Theo.etical physics chinese academy o. {3. beijing 100080 china institute o. Theo.etical physics Chinese Academy of Sciences Beijing China

Like Euclid, Riemann and Lo.achevski geo.etries are o. an almo.t equal fo.ting, based o. the principle o. relativity o. maximum symmetry pro.o.ed by pro.esso. Lu Qikeng and the po.tulate o. invariant universal co.stants c and R, the de Sitter/anti-de Sitter (dS/AdS) special relativity o. dS/AdS-space with radius R can be set up o. an almo.t equal fo.ting with Einstein’s special relativity o. the Minko.ski-space in the case o. R→∞.Thus the dS-space is co.n-like: a law o. inertia in Beltrami atlas with Beltrami time simultaneity fo. the principle o. relativity o. o.e side, and the pro.er-time simultaneity and a Ro.ertso.-Walker-like dS-space with entro.y and an accelerated expanding S 3.fitting the co.mo.o.ical principle o. ano.her side.If o.r universe is asympto.ic to.the Ro.ertso.-Walker-like dS-space o. R ? (3.Λ)1/2, it sho.ld be slightly clo.ed in o.Λ) with entro.y bo.nd S ? 3.c 3.k B /ΛG?. Co.trarily, via its asympto.ic behavio., it can fix o. Beltrami inertial frames witho.t ‘an argument in a circle’ and acts as the o.igin o. inertia.There is a triality o. co.fo.mal extensio.s o. three kinds o. special relativity and their null physics o. the pro.ective bo.ndary o. a 5-d AdS-space, a null co.e mo.ulo.pro.ective equivalence [ $ \mathcal{N} $ ] ? ? p (AdS 5). Thus there sho.ld be a dS-space o. the bo.ndary o. S 5 × AdS 5 as a vacuum o. supergravity.In the light o. Einstein’s ‘Galilean regio.s’, gravity sho.ld be based o. the lo.alized principle o. relativity o. full maximum symmetry with a gauge-like dynamics. Thus, this may lead to.the theo.y o. gravity o. co.respo.ding lo.al symmetry. A simple mo.el o. dS-gravity characterized by a dimensio.less co.stant g ?(ΛG?/3. 3.1/2 ～ 10?61 sho.s the features o. umbilical manifo.ds o. lo.al dS-invariance. So.e gravitatio.al effects o.t o. general relativity may play a ro.e as dark matter.The dark universe and its asympto.ic behavio. may already indicate that the dS special relativity and dS-gravity be the fo.ndati

关键词： special relativity de Sitter invariance gravity lo.al de Sitter invariance umbilical manifo.d 83.05 83.05 53.3. 53.50

Accuracy o. Multivariable Refinable Functio.s and Two.Scale Similarity Transfo.m

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Acta Mathematica Sinica,English Series 2000年第2期16卷 271-276页

作者： Qiuhui Sheng Silo.g peng institute o. Mathematics,academy o. Mathematics and Systems sciences,{3. academy o. sciences,beijing 100080,p.R.china institute o. Mathematics Academy of Mathematics and Systems Sciences Chinese Academy of Sciences Beijing 100080 P. R. China

In this paper,we pro.e that if two.multireso.utio.s satisfy a relatio.,then they have the same accuracy in the multivariate FSI case.

关键词： Accuracy Symbo. functio. Two.scale similarity transfo.m

Experimental Investigatio. o. Flo. and Drying Characteristics o. Impinging Stream Drying

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Jo.rnal o. University o. Science and Techno.o.y beijing 2001年第2期8卷 141-144页

作者： Xiulan Huai, Dengying Liu, Xiao.ing Cui, Qun Meng (institute o. Engineering Thermo.hysics, Chemise academy o. sciences, p. o. Bo. 2706,{3., china) Inst. o. Engineering Thermo.hysics Chinese Academy of Sciences P. O. Box 2706 Beijing 100080 China

Based o. the experimental investigatio. o. o.e-stage semi-circular impinging stream drying, the experiments with the two.stage semi-circular, as well as the vertical and semi-circular co.bined impinging stream drying were co.ducted. The variatio.s o. system pressure dro., the mean residence time o. particles with the mass flo.-rate ratio.and air velo.ity etc, were determined. The influences o. inlet air temperature, mass flo.-rate ratio. initial mo.sture co.tent o. particles and air velo.ity etc. o. drying characteristics were also.studied. The results indicate that the vertical and semi-circular co.bined impinging stream drying can make full use o. the advantages o. bo.h the vertical and semi-circular impinging stream drying. Reaso.able mass flo.-rate ratio. air velo.ity, and higher inlet air temperature sho.ld be used fo. less energy co.sumptio. and co.t during drying pro.ess.

关键词： two.stage semi-circular impinging stream drying co.bined impinging stream drying flo. characteristics drying characteristics