范德瓦耳斯和他的状态方程

在物理学发展史上，范德瓦耳斯对气—液流体系统做了开创性的研究工作，建立了人类历史上第一个既能反映气、液各相性质，又能描述相交和临界现象的状态方程。范德瓦耳斯的理论成就和研究方法对热力学、统计力学和低温物理学的发展产生了重要而深远的影响。文章系统探讨了范德瓦耳斯方程产生的历史背景、科学意义和局限性，讨论了范德瓦耳斯的理论和方法对当代物理学的启发意义。     

相对论热力学中玻意耳定律与焦耳定律之间的关系

证明在相对论热力学理论系统中,焦耳定律是玻意耳定律的推论,但玻意耳定律不是焦耳定律的推论.     

非相对论热力学中玻意耳定律与焦耳定律的相互独立性

证明在非相对论热力学理论系统中,焦耳定律不是玻意耳定律的推论,玻意耳定律也不是焦耳定律的推论．用热力学证明理想气体的低温热容满足关系式∫0ε[Cv(θ）/θ]dθ= ∞,并对以往的争论给予一些评论．     

玻耳兹曼分布定律对固相表面短程引力场的应用

把玻耳兹曼分布定律应用于固相表现短程引力场并结合平均的概念给出了范德瓦耳斯方程,讨论了固相表现短程引力场对固－气相间压力的影响。     

用理想气体物态方程求玻耳兹曼常量——宏观理论与微观理论的印证

从热力学与统计物理两个角度建立了理想气体的物态方程，通过比较两个方程求出玻耳兹曼常量，说明宏观理论与微观理论是相互印证的．     

理想气体状态方程——从经典到量子

1 经典理想气体状态方程 1662年玻意耳和1679年马略特发现气体的压强p和体积V的乘积,在温度T一定下,是一个常量,称为玻意耳-马略特定律.     

Hot Nuclear Matter Equation of State and Finite Temperature Kaon Condensation

We perform a systematic calculation of the equation of state of asymmetric nuclear matter at finite temperature within the framework of the Brueckner-Hartree-Fock approach with a microscopic three-body force. When applying it to the study of hot kaon condensed matter, we find that the thermal effect is more profound in comparison with normal matter, in particular around the threshold density. Also, the increase of temperature makes the equation of state slightly stiffer through suppression of kaon condensation.     

Calculation of Equation of State of QCD at Finite Chemical Potential and Temperature

In this paper, using path integral techniques we derive a model-independent formula for the pressure density P（μ, T） （or equivalently the partition function） of Quantum Chromodynamics （QCD）, which gives the equation of state （EOS） of QCD at finite chemical potential and temperature. In this formula the pressure density P（μ, T） consists of two terms： the first term （p（μ, T）｜T=0） is a μ-independent （but T-dependent） constant; the second term is totally determined by G[μ, T]（p, ωn） （the dressed quark propagator at finite μ and finite T）, which contains all the nontrivial μ-dependence. Then, in the framework of the rainbow-ladder approximation of the Dyson-Schwinger （DS） approach and under the approximation of neglecting the μ-dependence of the dressed gluon propagator, we show that G[μ, T]（p,ωn） can be obtained from G[T]（p,ωn ） （the dressed quark propagator at μ= 0） by the substitution ωn →ωn ＋ iμ. This result facilitates numerical calculations considerably. By this result, once C [T] （p, ωn） is known, one can determine the EOS of QCD under the above approximations （up to the additive term p（μ, T）｜T=0）. Finally, a comparison of the present EOS of QCD and the EOS obtained in the previous literatures in the framework of the rainbow-ladder approximation of the DS approach is given. It is found that the EOS given in the previous literatures does not satisfy the thermodynamic relation ρ（μ,T） =δp（μ,T）/δμ｜T.     

室温高压下天然锡石状态方程研究

 利用金刚石压腔同步辐射X射线就位衍射技术,在室温、最高压力达13 GPa条件下,对采自云南个旧锡矿的天然锡石做了X衍射测量。结果表明,在实验压力范围内锡石未发生相变,其晶胞参数随压力增大而逐渐减小。与前人合成锡石实验结果相比,本次实验测定的晶胞参数偏大。由Birch状态方程对实验结果p-V进行最小二乘法拟合,得出锡石的K_T(0)＝228 GPa。分析认为,在天然矿物晶体中,Zr对Sn的类质同象置换是晶胞参数偏大的主要原因。     

The Renormalized Equation of State and Quark Star

By means of the EOS of QCD at zero temperature and finite quark chemical potential we proposed [Phys. Rev. D 78 （2008） 054001] in the framework of rainbow-ladder approximation of Dyson-Schwinger approach, we investigate the structure of quark star and its property. It is found that the mass-radius relation in our model is very different from that of usual quark star models, but similar to neutron star models. The obtained mass of quark star is about 1.75M⊙- 2.2M⊙. The obtained radius of quark star is 22 - 26 km, which is obviously larger than the results in other models. The reason for this discrepancy is analyzed.     

Equation of State in the Fugacity Format for the Two-Dimensional Coulomb Gas

We derive the general form of the equation of state, in the fugacity format, for the two-dimensional Coulomb gas. Our results are valid in the conducting phase of the Coulomb gas, for temperatures above the Kosterlitz–Thouless transition. The derivation of the equation of state is based on the knowledge of the general form of the short-distance expansion of the correlation functions of the Coulomb gas. We explicitly compute the expansion up to order in the activity ζ. Our results are in very good agreement with Monte Carlo simulations at very low density.     

爆轰产物物态方程（Ⅰ）——爆热、爆轰产物的等熵方程和物态方程

 讨论了爆热、爆轰产物的等熵方程和物态方程，试澄清这方面的一些疑点。     

二元混合工质的节流最大转变温度状态方程计算

基于对 Joule- Thomson系数αh 及转变曲线计算公式的推导 ,计算了二元混合工质的最大转变温度 Tkm ,所得结果对节流制冷机的性能分析及工质选择具有重要的意义     

Temperature Effects on the Equation of State and Symmetry Energy at Low and High Densities

Thermal properties of symmetric nuclear matter and pure neutron matter are studied in a selfconsistent Green’s function and Brueckner–Hartree–Fock approaches with the inclusion of the contact interaction using CDBONN potential. Also we investigate the temperature dependence of the symmetry energy. The symmetry energy at fixed density is found to generally decrease with temperature. The temperature effects on the nuclear matter symmetry energy are found to be stronger at lower densities while become much weaker at higher densities. The results of several microscopic approaches are compared. Also the results are compared with recent experimental data. There is good agreement between the experimental symmetry energy and those calculated in the Brueckner–Hartree–Fock approach.