Mathematical Modeling of Two-Phase Convective Flows with Fine Particles

A two-phase convective flow with convection caused by a nonuniform distribution of solid particles is considered. The use of the mathematical model proposed is illustrated by an example of a two-phase flow in a shutter sedimentation reservoir.     

A high pressure-high temperature cell for electrical resistivity studies

A high pressure-high temperature cell which permitsin-situ pressure and temperature calibration is described. The cell is in an opposed anvil configuaration, and houses two samples with four probes each along with a miniature furnace and a thermocouple. The pressure and temperature capability of the cell are 100 kbar and 1000°C respectively. This cell was developed to study the electrical resistivity of metals and alloys at high pressure and high temperature. Bismuth was used to calibrate the cell. We report in this paper the design details and the performance of this cell. Ni has been chosen as a test problem and the observed behaviour is indicated to show the quality of data.     

Anisotropic emission characteristics of semitransparent spherical particle with spherically asymmetric temperature distribution

The Monte Carlo ray-tracing method (MCRT) based on the concept of radiation distribution factor is extended to study the anisotropic emission characteristics of semitransparent spherical particle with spherically asymmetric temperature distribution. The dimensionless apparent spectral radiative intensity of particle emission is calculated by the radiation distribution factor. The effects of the related parameters on the dimensionless apparent spectral radiative intensity are analyzed and discussed. The results show that the anisotropy of particle emission increases with the spherically asymmetry of particle temperature, and the refractive index and the particle optical thickness strongly affect the anisotropic emission characteristics of semitransparent spherical particle with spherically asymmetric temperature distribution.     

费米子动力学效应对胶子凝聚的贡献

研究了费米子动力学效应对两胶子、三胶子凝聚的贡献,研究结果表明:随温度升高,胶子凝聚值比未计及费米子动力学效应衰减得更快;并且随着夸克味数的增加,加快衰减.当味数N_f=3时,胶子凝聚消失的温度为T_0≈200MeV。     

恶性肿瘤的传质问题（Ⅱ）——药物传输部分

本文提出肿瘤中药物传输的三重介质模型·基于第（Ⅰ）部分流体动力学的计算结果，采用有限元方法，在不同初始和边界条件下求解了对流—扩散方程组·根据计算结果，详细分析了药物注射方式、分子量、淋巴、药物结合和坏死区等对抗体免疫球蛋白ＩｇＧ及其片断Ｆａｂ在肿瘤中浓度分布的影响·     

Optical Transfer Function of a Binary Markovian Mixture

A system of differential equations describing the optical transfer function (OTF) of a binary Markovian mixture is considered in a small-angle approximation. Its analytical solution has been found for the case where the mixture components have different extinction and scattering coefficients but identical scattering indicatrixes. The results of investigation show that the optical transfer function of the binary Markovian mixture depends strongly on the dimensions of nonuniformities and on the difference between the optical parameters of the mixture components, but it always markedly exceeds the optical transfer function of a uniform medium.     

大白鼠的肝电探测及肝电效应

介绍了一种探测大白鼠肝肝电的方法和几种肝电图，并探讨了鼠肝肝电产生的机理；还发现鼠肝具有二极管效应和储电能力．根据鼠肝肝电图和上述肝电效应能明确区分肝功能正常鼠和肝功能异常鼠（包括患肝病鼠）．     

核子碰撞截面的介质修正对多重碎裂的影响

利用同位旋相关的量子分子动力学模型研究了中能重离子碰撞过程中,同位旋相关的核子碰撞截面的介质修正对于多重碎裂的影响.结果表明:在包括动量相关作用在内的软势的情况下,介质修正明显地提高了自由核子的发射和中等质量碎片的多重性对于核子碰撞截面的同位旋依赖的敏感性.但对于原子核阻止敏感地依赖于核子碰撞截面的同位旋效应而不敏感地依赖于对称势的形式这一性质的影响并不明显,因此,原子核阻止对于核子碰撞截面的同位旋依赖的敏感性主要决定于自由核子碰撞截面的同位旋相关性.     

中等精度塑料光学透镜的批量生产技术

提高批量生产中塑料光学透镜的质量及稳定性，需采取综合的技术和管理措施。如提高模具的精度，特别是型芯、型腔的精度；在模具上采用特种浇注系统、控温系统；选择合适的设备；采用合理的工艺及参数；加强生产时的在线质量监控等等。通过二种较典型的塑料光学透镜的生产，证明只要措施得当，就能大批量、稳定地生产出较高合格率的产品。