检索结果-南通市图书馆

EQUATION OF STATE CALCULATIONS FOR HOT, DENSE MATTER AT ARBITRARY DENSITIES AND TEMPERATURES

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 1989年第4期5卷 361-368页

作者： Li Zhaoning Pan Shoufu institute of Atomic and Molecular physics, Jilin University institute of Atomic and Molecular physics Jilin University Jilin China

Within the approximations of spherical lattice cell, central-field, and relativistic Fermi statis- tics, an algorithm with average atom model is presented to calculate the electronic energy levels and equation of state for hot and dense matter at arbitrary densities and temperatures. Choosing Zink's analytical potential as initial potential, we have solved the Dirac-Slater equation which satisfies the Weigner-Seitz boundary condition. The electronic energy bands are not taken into account. Tak- ing energy level degeneracy as a continuous function of density, we have considered the pressure ionization effects for highly dense matter. Results for ^(13)Al atom are shown.

关键词： average atom model equation of state Dirac-Slater equation pressure ionization effect.

A 3.9 V polyanion-type cathode material for Li-ion batteries

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2011年第3期21卷 211-215页

作者： Lei LIU,Bin ZHANG,Xue-jie HUANG Beijing National Laboratory for Condensed Matter physics, institute of physics,Chinese Academy of Sciences,Beijing,100190,China Beijing National Laboratory for Condensed Matter physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China

Monoclinic phase LiFeSO4F was synthesized by a simple fast solid state reaction from the mixture of FeSO4·7H2O and LiF pulverized by high energy ball milling.m-LiFeSO4F was confirmed by GITT measurement to be a 3.9 V polyanion-type cathode materials for Li-ion *** electrochemical activity can be enhanced by addition of carbon.A discharge capacity of 105 mA·h/g (70%of theoretical value) was achieved for a m-LiFeSO4F/CNT *** separation behavior during lithium extraction and insertion was observed by ex-situ XRD test.

关键词： LiFeSO4F polyanion cathode Li-ion battery

Linear relationship between the interdecadal and interannual variabilities of North China rainfall in rainy season

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2003年第10期48卷 1040-1044页

作者： LU Riyu institute of Atmospheric physics, Chinese Academy of Sciences, Beijing 100080, China institute of Atmospheric physics Chinese Academy of Sciences Beijing 100080 China

Interdecadal and interannual timescales are dominant in the North China rainfall in rainy season (July and August). On the interdecadal timescale, the North China rainfall exhibited an abrupt decrease at the end of 1970s. In this study, we examined the effect of this abrupt rainfall decrease on the association between rainfall and circulation on the interannual timescale, and found that the interdecadal variation does not change the physical mechanism responsible for the interannual variation of North China rainfall. There is a linear relationship between the interdecadal and interannual variabilities of North China rainfall in rainy season.

关键词：线性关系中国北部降雨量大气环流

MEASUREMENT OF PLASMA POTENTIAL USING EMISSIVE PROBE IN A MAGNETIC MI

在线全文

学校读者我要写书评

暂无评论

国防科技大学学报 1995年第3期17卷 104-108页

作者： Zhang Jiande(Department of Applied physics, NUDT, Changsha, 410073)Fang Yude Qiu Lijian Ren Zhaoxing(institute of Plasma physics, Academia Sinica, Hefei, 230031)

ＭＥＡＳＵＲＥＭＥＮＴＯＦＰＬＡＳＭＡＰＯＴＥＮＴＩＡＬＵＳＩＮＧＥＭＩＳＳＩＶＥＰＲＯＢＥＩＮＡＭＡＧＮＥＴＩＣＭＩＲＲＯＲＺｈａｎｇＪｉａｎｄｅ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，ＮＵＤＴ，Ｃ... 详细信息

ＭＥＡＳＵＲＥＭＥＮＴＯＦＰＬＡＳＭＡＰＯＴＥＮＴＩＡＬＵＳＩＮＧＥＭＩＳＳＩＶＥＰＲＯＢＥＩＮＡＭＡＧＮＥＴＩＣＭＩＲＲＯＲＺｈａｎｇＪｉａｎｄｅ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，ＮＵＤＴ，Ｃｈａｎｇｓｈａ，４１００７３）Ｆａ...

关键词：离子体电势测量发射探针磁镜

A LAX-WENDROFF TYPE SCHEME WITH PREDICTOR-CORRECTOR

在线全文

学校读者我要写书评

暂无评论

计算物理 1991年第1期 95-101页

作者： Xu Guorong(institute of Applied physics and Computational Mathematics. Beijing)

In this paper a Lax- Wendroff type scheme with predictor-corrector is presented for solving the hyperbolic equations of fluid flow. The predictor solutions without introducing nonphysical oscillation are obtained by the method of flux vector splitting. The numerical flux of the corrector step is an anti - diffusive term, on which contraints are imposed to decrease the oscillation. Numerical experiments are presented to illustrate the performance of our proposed scheme.

关键词： A LAX-WENDROFF TYPE SCHEME WITH PREDICTOR-CORRECTOR 一刁二川

Light A physics in the lepton-specific two-Higgs doublet model

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(physics,Mechanics & Astronomy) 2010年第11期53卷 1981-1987页

作者： CAO JunJie 1,HENG ZhaoXia 2,3 & WAN PeiHua 1 1 College of physics & Information Engineering,Henan Normal University,Xinxiang 453007,China 2 Key Laboratory of Frontiers in Theoretical physics,institute of Theoretical physics,Chinese Academy of Sciences,Beijing 100190,China 3 Kavli institute for Theoretical physics China,Chinese Academy of Sciences,Beijing 100190,China College of physics & Information Engineering Henan Normal University Xinxiang China Key Laboratory of Frontiers in Theoretical physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing China Kavli institute for Theoretical physics China Chinese Academy of Sciences Beijing China

We examine various direct and indirect constraints on the lepton-specific two-Higgs doublet model and discuss its phenomenology at colliders in the allowed parameter *** constraints we consider come from the precision electroweak data,the direct search for Higgs boson,the muon anomalous magnetic moment,as well as some theoretical consistency *** find that in the allowed parameter space the CP-odd Higgs boson A is rather light (m A < 30 GeV with 95% possibility),which is composed dominantly by the leptonic Higgs and decays dominantly into τ + τ;while the SM-like Higgs boson h (responsible largely for electroweak symmetry breaking) decays dominantly in the mode h → AA → 4τ with a large decay width,which will make the Higgs discovery more difficult at the ***,this scenario predicts rare Z decays Z → AAA and Z →τ + τA with their branching ratios ranging from 10-8 to 10-and 10-5 to 10-4 respectively,which may be accessible at the GigaZ option of the ILC.

关键词： Lepton-specific two-Higgs doublt model light Higgs boson A Z decays

Microstructure of Pd_(77.5)Au_6Si_(16.5) Alloy Droplet Solidified in a Drop Tube Process

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 1996年第5期12卷 385-388页

作者： Liling SUN Qi WU Liwei SUN and Wenkui WANG (institute of physics, Chinese Academy of Sciences, Beijing 100080, China) institute of physics Chinese Academy of Sciences Beijing 100080 China

The microstructure development of Pd77.5Au6Si16.5 alloy droplet solidified in a drop tube process was studied. It was found that two distinct microstructures, i.e. (Pd,Au)3Si primary phase and Pd+(Pd,Au)3Si eutectic can be obtained when the droplet diameter is within the range between 2.3~0.4 mm. The morpologies of the (Pd,Au)3Si developed from dendrite trunk-like with single branching only into dendrite cluster-like with ternary branching with the decrease of the droplet diameter. When the droplet diameter is about 0.25 mm, the primary phase (Pd,Au)3Si almost disappears and the microstructure mainly shows Pd+(Pd,Au)3Si eutectic. The morphology of the eutectic transforms from fiber-like to plate-like with the decrease of the droplet diameter in the range between 2.3-0.25 mm. When the droplet diameter is about 0.19 mm, the microstructure is only the single phase of Pd solid solution

关键词： Microstructure of Pd Au6Si Alloy Droplet Solidified in a Drop Tube Process

Experimental Study of Motion of Nitrogen Taylor Bubbles and Liquid Slugs in Inclined Tubes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2009年第4期22卷 349-354页

作者： Zhang Hua,Wang Shuhua,Wang Jing institute of Engineering Thermo-physics,Shanghai Jiao Tong University,Shanghai 200240,China institute of Engineering Thermo-physics Shanghai Jiao Tong University Shanghai 200240 China

This article studies rising velocity of Taylor bubbles and liquid slugs in liquid nitrogen at different axial positions in upward inclined tubes by means of a high speed motion analyzer. The bottom-closed tubes in the experiments are 1.0 m long with an inner diameter of 0.014 m or 0.018 m. The tube inclines upward from 0~ to 50~ with respect to the normal. Statistical method is used to analyze the data of the Taylor bubble and the liquid slug velocity. Reflecting the effects of the inclination angle on the rising velocity of Taylor bubbles and liquid slugs, the experimental results indicate the similar trend the Taylor bubble velocity and the liquid slug velocity have： it increases first, and then decreases with the increase of the inclination angle. Moreover, with the increase of the inclination angle, the liquid slug velocity becomes greater than Taylor bubble velocity.

关键词： cryogenic two-phase flow rising velocity high speed motion analyzer liquid nitrogen Taylor bubble liquid slug inclined tube

Morphology and the M_(BH)-σ_* relation for NLS1s

在线全文

学校读者我要写书评

暂无评论

Science China(physics,Mechanics & Astronomy) 2010年第S1期53卷 256-258页

作者： BIAN WeiHao & HUANG Li Department of physics and institute of Theoretical physics,Nanjing Normal University,Nanjing 210097,China Department of physics and institute of Theoretical physics Nanjing Normal University Nanjing China

For a sample of 33 narrow-line Seyfert 1 galaxies(NLS1s)(z<0.1) from the Sloan Digital Sky Survey,we investigate their *** find that 24 NLS1s show clear bar structure and 9 NLS1s show no bar *** bar frequency in this NLS1s sample is about 70%.We do not find any difference in the location of NLS1s with or without bars on the MBH-σ* diagram.

关键词： active galaxies bar black hole mass