MEASUREMENTS OF Fe AND Cu K-Shell IONIZATION CROSS SECTIONS BY SLOW ELECTRON IMPACT

ＭＥＡＳＵＲＥＭＥＮＴＳＯＦＦｅＡＮＤＣｕＫ－ＳｈｅｌＩＯＮＩＺＡＴＩＯＮＣＲＯＳＳＳＥＣＴＩＯＮＳＢＹＳＬＯＷＥＬＥＣＴＲＯＮＩＭＰＡＣＴＬｉＴａｉｈｕａＡｎＺｈｕＬｕｏＺｈｅｎｇｍｉｎｇＣｅｎｔｅｒｆｏｒＲａｄｉａｔｉｏｎＰｈｙｓｉｃｓ，Ｉｎｓ...     

DEUTERIUM INFLUX PROFILE ALONG THE APEX OF THE UPPER X-POINT TILES IN JET

ＤＥＵＴＥＲＩＵＭＩＮＦＬＵＸＰＲＯＦＩＬＥＡＬＯＮＧＴＨＥＡＰＥＸＯＦＴＨＥＵＰＰＥＲＸ－ＰＯＩＮＴＴＩＬＥＳＩＮＪＥＴ￥Ｙ．Ｋ．Ｚｈｕ（ＳｏｕｔｈｗｅｓｔｅｒｎＩｎｓｔｉｔｕｔｅｏｆＰｈｙｓｉｃｓ，Ｐ．Ｏ．Ｂｏｘ４３２，Ｃｈｅｎｇｄｕ６１００４１...     

EFFECT OF RADIAL ELECTRICAL FIELD ON NEOCLASSICAL TRANSPORT IN TOKAMAKS

ＥＦＦＥＣＴＯＦＲＡＤＩＡＬＥＬＥＣＴＲＩＣＡＬＦＩＥＬＤＯＮＮＥＯＣＬＡＳＳＩＣＡＬＴＲＡＮＳＰＯＲＴＩＮＴＯＫＡＭＡＫＳＥＦＦＥＣＴＯＦＲＡＤＩＡＬＥＬＥＣＴＲＩＣＡＬＦＩＥＬＤＯＮＮＥＯＣＬＡＳＳＩＣＡＬＴＲＡＮＳＰＯＲＴＩＮＴＯＫＡＭＡＫＳ￥...     

离心叶栅内气固两相流动的数值模拟

离心叶栅内气固两相流动的数值模拟蔡体菁，王文琪，郁斌（东南大学动力工程系南京２１００１８）关键词：离心叶栅，粒子轨迹，龙格－库塔方法。ＮＵＭＥＲＩＣＡＬＭＯＤＥＬＩＮＧＦＯＲＧＡＳ－ＳＯＬＩＤＳＦＬＯＷＳＴＨＲＯＵＧＨＡＣＥＮＴＲＩＦＵＧＡＬＣＡＳＣ...     

PUSHING THE ENVELOPE IN RAMAN SPECTROSCOPY

ＰＵＳＨＩＮＧＴＨＥＥＮＶＥＬＯＰＥＩＮＲＡＭＡＮＳＰＥＣＴＲＯＳＣＯＰＹＧ．Ｄ．Ｐｉｔｔ（ＵｎｉｖｅｒｓｉｔｙｏｆＬｅｅｄｓａｎｄＲｅｎｉｓｈａｗｐｌｃＵ．Ｋ）ＮｅｗｔｅｃｈｎｉｑｕｅｓｈａｖｅｂｅｅｎｄｅｖｅｌｏｐｅｄｆｏｒＵＶＲａｍａｎｍｉｃｒ...     

ELECTRON MOMENTUM SPECTRA OF EXCITED He(2~1S) AND He(2~3S)

ＥＬＥＣＴＲＯＮＭＯＭＥＮＴＵＭＳＰＥＣＴＲＡＯＦＥＸＣＩＴＥＤＨｅ（２１Ｓ）ＡＮＤＨｅ（２３Ｓ）ＣｈｅｎＺｈａｎｇｊｉｎＳｈｉＱｉｃｕｎＣｈｅｎＪｉＸｕＫｅｚｕｎＤｅｐａｒｔｍｅｎｔｏｆＭｏｄｅｒｎＰｈｙｓｉｃｓ，ＵｎｉｖｅｒｓｉｔｙｏｆＳｃｉｅｎ...     

华中理工大学“激光技术”国家重点实验室

华中理工大学“激光技术”国家重点实验室ＴＨＥＳＴＡＴＥＫＥＹＯＰＥＮＬＡＢＯＲＡＴＯＲＹＯＦＬＡＳＥＲＴＥＣＨＮＯＬＯＧＹ，ＨＵＳＴ￥／／激光技术实验室于１９８６年经国家计委批准筹建，１９８９年建成并通过国家验收，同期获准对外开放。１９９４年进行实验...     

CALCULATION FOR STRETCHING VIBRATIONAL SPECTRUM OF CH_4

ＣＡＬＣＵＬＡＴＩＯＮＦＯＲＳＴＲＥＴＣＨＩＮＧＶＩＢＲＡＴＩＯＮＡＬＳＰＥＣＴＲＵＭＯＦＣＨ４ＣｈｅｎＸｉａｎｇｒｏｎｇＧｏｕＱｉｎｇｑｕａｎＰａｎｇＸｉａｏｆｅｎｇＩｎｓｔｉｔｕｔｅｏｆＡｔｏｍｉｃａｎｄＭｏｌｅｃｕｌａｒＳｃｉｅｎｃｅａｔＨｉｇ...     

THE MACQM CALCULATION OF THE TOTAL ENERGY CURVE FOR THE ICOSAHEDRAL CENTRAL STRUCTURE OF THE CLUSTER H_13~-

ＴＨＥＭＡＣＱＭＣＡＬＣＵＬＡＴＩＯＮＯＦＴＨＥＴＯＴＡＬＥＮＥＲＧＹＣＵＲＶＥＦＯＲＴＨＥＩＣＯＳＡＨＥＤＲＡＬＣＥＮＴＲＡＬＳＴＲＵＣＴＵＲＥＯＦＴＨＥＣＬＵＳＴＥＲＨ－１３ＺｈａｎｇＪｉａｎｐｉｎｇ＊ＬｉＰｉｎｇＧｏｕＱｉｎｇｑｕａｎＩｎｓｔ...     

POPULATION DYNAMICS IN THE FOUR-PHOTON THREE-STEP PHOTOIONIZATION

ＰＯＰＵＬＡＴＩＯＮＤＹＮＡＭＩＣＳＩＮＴＨＥＦＯＵＲ－ＰＨＯＴＯＮＴＨＲＥＥ－ＳＴＥＰＰＨＯＴＯＩＯＮＩＺＡＴＩＯＮ￥ＳｈｉｌｉａｎｇＸｉｅ；ＤｅｗｕＷａｎｇ；ＣｈｕｎｔｉｏｎＹｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＥｎｇｉｎｅｅｒｉｎｇＰｈｙｓｉｃｓ，...     

HFC混合物二元交互作用系数研究

目前国际上已商业化使用或提出的潜在的环保工质,大多数为氢氟烃(HFC)混合物,利用状态方程描述混合工质热力性质时,交互作用系数是重要参数之一。本文应用Peng-Robinson状态方程对多种HFC二元混合物的气液相平衡(vapor—liquid equilibrium,VLE)实验数据进行了回归,得到了相应混合物的交互作用系数。提出了交互作用系数新关联式,结果表明所得到的交互作用系数能很好的应用于描述HFC混合物气液相平衡性质,计算精度可以满足工程应用的需要。     

二甲基醚液滴超临界蒸发的数值模拟

建立了二甲基醚(DME)在N2介质中超临界蒸发的数学模型.采用状态方程法计算了DME-N2体系的高压气液相平衡,在相关文献的基础上得出一套流体热物性和输运参数的计算方法.完成了DME超临界蒸发过程的数值模拟.从数值模拟的结果讨论了超临界条件下环境压力、环境温度和液滴运动等因素对液滴升温、滴径变化以及生存时间的影响.     

三元混合制冷剂R290+R600a+N2汽液相平衡实验研究

在氢气液化工艺中，预冷循环是重要的一环，其中混合制冷剂(mixed refrigerant,MR)预冷循环是单位能耗比较低的，故对MR性能的优化显得尤为重要.为此利用液相单相循环法搭建汽液相平衡(Vapor-liquid equilibrium,VLE)实验系统，研究了R290+R600a+N₂三元体系的VLE性质，在273.15 K～323.15 K的温度范围内，对三元混合工质R290+R600a+N₂进行实验研究，并获得18组实验数据.同时使用Peng-Pobinson-Stryjek-Vera (PRSV)状态方程结合van der Waals(vd W)混合法则对R290+R600a、R290+N₂、R600a+N₂三组二元体系的VLE文献数据进行了拟合计算，得到二元交互作用系数，拟合结果与文献数据吻合良好.以此为基础，推算该三元体系的VLE性质.最后将实验数据与计算结果对比表明，体系压力平均相对偏差AARDp为0.85%，系统组分R290、R600a和N₂的气相平均绝...     

On the solution to the Boltzmann kinetic equation in calculating the heat flux in polyatomic gases

The solution of the linearized Wang Chang-Uhlenbeck equation using the Hanson-Morse model for calculating the heat flux in a plane molecular gas layer has been considered. General expressions (independent of the form and method for solving the kinetic equation) of the dependence of heat flux on the energy accommodation coefficients have been derived. The values of the temperature jump coefficient for specific gases have been obtained.     

统一性溶液理论及其应用

本文基于正规溶液模型和胞腔溶液模型构作了一个称之为统一性的溶液理论，并以此建立了相应的超额Ｇｉｂｂｓ自由能和活度系度数方程。另外，还应用该模型的活度系数方程计算了一些具有代表性体系的汽液平衡，取得很好的结果。     

Thermal expansion and compressibility of β-As4S3

Temperature and pressure variation of the lattice constants and unit cell volume have been studied with the help of low temperature Guinier-Simon film technique and energy dispersive high pressure X-ray diffraction. Volume thermal expansion coefficient at room temperature and its derivative have been obtained by fitting the experimental data with volume-temperature equation obtained from purely thermodynamic considerations. Similarly bulk modulus at ambient pressure and its derivative with respect to pressure have been obtained by fitting volume-pressure data with the Murnaghan equation of state. The anisotropy of thermal expansion coefficient and the compressibility have been discussed.     

Ab initio calculations of the thermodynamic parameters of lithium, sodium, and potassium oxides under pressure

The parameters of the equation of state and Grüneisen parameters for lithium, sodium, and potassium oxides have been calculated in the generalized gradient approximation of the density functional theory using a linear combination of atomic orbitals with the CRYSTAL09 software package. The frequencies of long-wavelength normal mode vibrations have also been calculated and the dependence of these frequencies on the pressure has been established. The Debye temperature has been determined from the elastic characteristics of the compounds. The dependences of the Debye temperature, compressibility, thermodynamic potential, entropy, specific heat, thermal expansion coefficient, and thermal conductivity coefficient on the pressure in the range from ?3 to ?15 GPa and on the temperature have been calculated in the quasi-harmonic Debye model. The results obtained are in satisfactory agreement with the available reference and experimental data.     

Galvanomagnetic and Thermomagnetic Properties of a Nonideal Xenon Plasma at Megabar Pressures in Megagauss Magnetic Fields

A method has been developed for the calculation of tensors of the electrical conductivity, Seebeck coefficient, and thermal conductivity of a nonideal plasma in a magnetic field within a unified approach where the kinetic coefficients are calculated together with the equation of state of the nonideal plasma within a quasichemical model. The calculations have shown that the Seebeck coefficient in xenon reaches 3 mV/K, which is slightly smaller than that in hydrogen or deuterium, and the figure of merit appears to be insignificantly higher in xenon. Consequently, the transition from hydrogen (deuterium) to xenon does not result in the expected noticeable improvement of thermoelectric properties. This is due to lower values of the Seebeck coefficient and electrical conductivity, as well as to a fast increase in the thermal conductivity of neutral xenon with an increase in its density. It has been shown for the first time that there is a density range where all components of the Seebeck tensor in xenon change their sign because of the Ramsauer minimum in the cross section for scattering of electrons on neutral atoms in the region of comparable values of cyclotron and transport frequencies of electrons.     

Computer simulation of the phenomenological transport coefficient in the lattice gas and Fick's First Law

A direct steady state computer simulation method for calculating the Onsager phenomenological transport coefficient from the gradient of the chemical potential in the one component lattice gas is presented. It is shown that the results are in good agreement with the Einsteinian method. A recent alternative formulation for Fick's First Law that had been proposed to replace the standard Fick's First Law formulation is also analysed using the same model. It is shown that the alternative formulation gives poor agreement with the simulation data whereas the standard Fick's First Law gives excellent agreement. Accordingly, the alternative formulation does not appear to have merit as a new definition of the diffusion coefficient. It is shown that the alternative formulation is a rough approximation for the dependence of the interstitial solute diffusion coefficient on solute concentration in an interstitial solid solution if information about the activity coefficient and solute diffusion coefficient at very dilute concentrations is available. However, in this role, this is not an entirely new idea.