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Low-cost, highly efficient Dye-Sensitized Solar Cells

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Low-cost, highly efficient Dye-Sensitized Solar Cells

An SGS Model and Its Application

ICAM Workshop physics of Novel energy Materials

作者： Qingbo Meng, Dongmei Li, Yanhong Luo renewable energy {2., institute of physics, chinese academy of sciences, beijing, 100190, China

Dye-sensitized solar cell (DSC) has received widely attention due to its low cost, easy fabrication and relatively high light-to-electricity conversion efficiency [1]. Up to now, the highest efficiency of DSCs in the ...

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来源： cnki会议评论

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Communications in Nonlinear Science and Numerical Simulation 1999年第2期4卷 87-90页

作者： Zhengtong XIE Jiachun LI (institute of Mechanics, chinese academy of sciences, {2. 100080, China) institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

Based on the turbulent energy and structure function model, a subgridstress model named transitional structure function (TSF) is proposed, which exhibitsmore satisfactory performance than the previous one when applied in turbulent flow withinand above forest *** time and horizontal averaged statistics such as mean verticalprofiles of wind velocity, Reynolds stress, turbulent kinetic energy etc., and instantaneousfields as well are in general agreement with earlier observations, at least in a qualitativesense.

关键词： Large-Eddy simulation SGS model turbulent flow canopy

The geometrical structure, electronic structure and magnetism of bimetallic Au_nM_2.(n=1, 2. M=Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd) clusters

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Science China(physics,Mechanics & Astronomy) 2009年第7期52卷 1011-1020页

作者： GU Juan1,2. WANG ShanYing2.& GOU BingCong1 1 Department of physics, beijing {2. of Technology, beijing 100081, China 2.Department of physics, Tsinghua University, beijing 100084, China Department of physics Beijing Institute of Technology Beijing 100081 China Department of physics Tsinghua University Beijing 100084 China

The geometrical structure, stability, magnetism, and electronic structure of bimetallic clusters AuM2.and Au2.2. where M are 4d transition metal elements, are investigated systematically by using the first-principles method based on density functional theory. The calculation results show that there is a large amount of low-energy isomers with the very similar structure. AuM2.and Au2.2.clusters display dramatic magnetism. The magnetic moment of the 4d element is either enhanced or weakened with respect to the bulk value, which is largely dependent on the orbital exchange-splitting.

关键词： density functional theory first-principles cluster electronic structure magnetism

Inelastic Scattering of Antiproton From ^(18)O

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chinese journal of nuclear physics 1997年第2期19卷 73-76页

作者： Hu Sufen~1 Yang Chaoyun~2.Zhang Yushun~(3,4)1 Department of physics,Zhejiang University,Hangzhou 31002.2.Department of physics,The School of Zhejiang Light Industry,Hanzhou 3100153 {2. of High energy physics,the chinese academy of sciences,beijing 1000394 CCAST(World Lab.),beijing 100080, 浙江大学物理系浙江杭州浙江轻工业学校物理系浙江杭州 310015 中科院高能物理所北京

The differential cross sections of the inelastic scattering of antiproton leading to the2. excited stae of 18O are calculated at 178.4 MeV by the Eikonal approximation and thecollective model of *** may be concluded t... 详细信息

The differential cross sections of the inelastic scattering of antiproton leading to the2.sup>+ excited stae of 18O are calculated at 178.4 MeV by the Eikonal approximation and thecollective model of *** may be concluded that the 2.sup>+ state is a quadruple *** results are in good agreement with experimental data.

关键词： Inelastic scattering Antiproton Eikonal approximation Collective model

MODIFICATION OF EPOXY RESIN WITH POLYSILOXANE BEARING PENDANT QUATERNARY AMMONIUM GROUPS

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chinese Journal of Polymer Science 2002年第6期20卷 537-541页

作者： Zuo-xin Huang Ying Huang Yun-zhao Yu The State Key laboratory of Engineering Plastics, institute of Chemistry{2., beijing 100080 China chinese Acad Sci Inst Chem State Key Lab Engn Plast Beijing 100080 Peoples R China

Polysiloxane bearing pendant quaternary ammonium groups (PSI) was used to modify the surface properties of epoxy resins. In the cured resin, PSI formed the dispersed phase. Remarkable enrichment and gradient distribution of polysiloxane on the surface region of the epoxy resins were demonstrated by XPS analysis. The composition and properties of the surface of PSI-modified epoxy resin, which is in contact with the mold, are dependent on the material of the mold. Through the incorporation. of PSI, epoxy resins with low surface energy and low friction coefficient were obtained. Polysiloxane with lower ionic group content shows a higher degree of enrichment on the resin surface and leads to a higher contact angle against water, while the polysiloxane having optimum compatibility with the epoxy resin shows a greater effect in reducing the static friction coefficient of the resin against glass.

关键词： polysiloxane epoxy resin surface composition friction coefficient

Calculation of triaxial superdeformation in ^(174)Hf

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Science China(physics,Mechanics & Astronomy) 2007年第5期50卷 553-557页

作者： YU ShaoYing1,2.4, LI XiaoWei2. SHEN CaiWan1,5 & CHEN YongShou3,4 1 School of Science, Huzhou Teachers College, Huzhou 313000, China 2.College of Mathematics, physics and Information Engineering, Zhejiang Normal University, Jinhua 32.000, China 3 China institute of Atomic {2., beijing 102.13, China 4 institute of Theoretical physics, chinese academy of sciences, beijing 100080, China 5 Center of Theoretical Nuclear physics, National laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China 1. School of Science Huzhou Teachers College Huzhou 313000 China 2. College of Mathematics Physics and Information Engineering Zhejiang Normal University Jinhua 321000 China 4. institute of Theoretical physics Chinese Academy of Sciences Beijing 100080 China 5. Center of Theoretical Nuclear physics National Laboratory of Heavy Ion Accelerator of Lanzhou Lanzhou 730000 China 3. China institute of Atomic energy Beijing 102413 China

A two-dimensional Total Routhian Surface (TRS) calculation with the fixed hexa- decapole deformation ε4 = 0.03 was carried out for several configurations of 174Hf. Results indicate that the shell corrections have an important contribution to the formation of triaxial superdeformation in 174Hf and some possible configuration assignments are made to the 4 TSD bands experimentally found in 174Hf.

关键词： Total Routhian Surface (TRS), triaxial superdeformation, configuration

The Amplitude of Mass Fluctuations and Mass Density of the Universe Constrained by Strong Gravitational Lensing

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chinese Journal of Astronomy and Astrophysics 2004年第2期4卷 118-124页

作者： Da-Ming ChenNational Astronomical Observatories, chinese academy of sciences, beijing 100012.cdm@*** National Astronomical Observatories Chinese Academy of Sciences Beijing 100012

We investigate the linear amplitude of mass fluctuations in the universe, σ8, and the present mass density parameter of the Universe, Ωm, from statistical strong gravitational lensing. We use the two population model of lens halos with fixed cooling mass scale Mc = 3×1013h-1M⊙ to match the observed lensing probabilities, and leave σ8 orΩm as a free parameter to be constrained by the data. Another varying parameter, the equation of state of dark energy ω, and its typical values of -1, -2.3, -1/2.and -1/3 are investigated. We find that σ8 is degenerate with Ωm in a way similar to that suggested by present day cluster abundance as well as cosmic shear lensing measurements: σ8Ω0.6m≈0.33. However, both σ8≤0.7 and Ωm≤0.2.can be safely ruled out, the best fit is when σ8 = 1.0, Ωm = 0.3 and ω= - 1. This result is different from that obtained by Bahcall & Bode, who gave σ8 = 0.98±0.1 and Ωm = 0.17 ±0.05. For σ8 = 1.0, the higher value ofΩm = 0.35 requires ω = -2.3 and Ωm = 0.40 requires ω= -1/2.

关键词： cosmology: theory - cosmological parameters - gravitational lensing

The rms-flux relation of Cyg X-2.in the horizontal branch

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中国科学：物理学、力学、天文学英文版 2010年第S1期53卷 86-90页

作者： LI ZhiBing,LEI YaJuan,QU JinLu,ZHANG Shu & SONG LiMing Key laboratory for Particle Astrophysics,{2. of High energy physics,chinese academy of sciences(CAS),beijing 100049,China chinese Acad Sci Inst High Energy Phys Key Lab Particle Astrophys Beijing 100049 Peoples R China

We have investigated the relation between the root mean square(rms) variability and the X-ray flux(rms-flux relation) of the Z source Cyg X-2.and as well the energy dependence based on the Rossi X-ray Timing Explorer(RXTE) *** currently focus on the horizontal branch(HB),due to the negative correlation in flux of the soft and the hard *** rms-flux correlation has energy dependence as follows:positive at hard X-rays(above 10 keV) but negative at soft X-rays(below 10 keV).This provides a feature different from the previous one,and may be suggestive of different origins of X-rays below and above 10 ***,the overall spectrum can be well fitted with a model consisting of a blackbody and Comptonization components,but the fitting results do not reveal any features around 10 keV that could account for such a change in the rms-flux relation.

关键词： accretion accretion disk—binaries:close-stars:individual(Cygnus X-2.-X-rays:binaries

Virtualities of quark and gluon in QCD vacuum

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Science China(physics,Mechanics & Astronomy) 2008年第10期51卷 1439-1447页

作者： ZHOU LiJuan1, QIN SongMei2. WU Qing3 & MA WeiXing4 1 Collaboration Group of Hadron physics and Non-perturbative QCD Study, Guangxi University of Tech- nology, Liuzhou 545006, China 2.Department of physics, Guangxi University, Nanning 540003, China 3 Department of physics, Qingdao University, Qingdao 2.6071, China 4 institute of High energy physics, chinese academy of sciences, beijing 100049, China 1. Collaboration Group of Hadron physics and Non-perturbative QCD Study Guangxi University of Technology Liuzhou 545006 China 2. Department of physics Guangxi University Nanning 540003 China 3. Department of physics Qingdao University Qingdao 266071 China 4. institute of High energy {2. Chinese Academy of Sciences Beijing 100049 China

The non-local vacuum condensates of quantum chromodynamics (QCD) describe the distributions of quarks and gluons in the non-perturbative QCD vacuum state. Physically, this means that vacuum quarks and gluons have a nonzero mean-squared momentum in the vacuum, called virtuality. The quark virtuality is given by the ratio of the local quark-gluon mixed vacuum condensate to the quark local vacuum condensate. The gluon virtuality is expressed by gluon vacuum condensates and four-quark vacuum condensates. We study the two virtualities by solving Dyson-Schwinger Equations and calculating quark and gluon vacuum condensates. Our theoretical results for quark virtuality are in good agreement with many other theoretical model predictions such as QCD sum rules and lattice QCD calculations. Our calculation on gluon virtuality is initial and the results are quite interesting.

关键词： quark gluon virtuality QCD vacuum condensate non-perturbative QCD