The Isoelectric Point and the Points of Zero Charge of Fe-Al-Mg Hydrotalcite-like Compounds

The relation of the isoelectric point (IEP) and the point of zero net charge (PZNC) of the hydrotalcite-like compounds was discussed. It was found that the IEP does not equal to the PZNC and the IEP is higher than the PZNC. The structural positive charges existing in the HTlc,which cause the difference between the IEP and the PZNC. The effects of the structural positive charges of the HTlc on its IEP and PZNC are the same as the specific adsorption of metal cations.     

Geometric Characterizations for Subgroups of PU（1, n; C）

In this paper, we discuss non-elementary subgroups and discontinuous subgroups of PU(1,n; C), and give their geometric characterizations.     

超幂等环的交换性

证明了下面的命题:若对环R中任意元x都存在整数k(x)>1使x~(k(?))=x,则R为交换环。这是Jacobson的一个著名结果的较大的改进。还得到了更普遍的结果。     

Covariant Perturbation Theory of Non—Abelian Kinetic Theory

A “double perturbation” theory is presented in the framework of the kinetic theory of quark-gluon plasma.A solvable set of equations from the double perturbation are derived and proven to be gauge invariant.The Landau damping rate for the plasmon at zero momentum is shown to be a convergent series in correlators.     

Bound States of the S-Wave Equation with Equal Scalar and Vector Standard Eckart Potential

A supersymmetric technique for the bound-state solutions of the s-wave Klein-Gordon equation with equal scalar and vector standard Eckart-type potential is proposed. Its exact solutions are obtained. Possible generalization of our approach is outlined.     

关于态射的Drazin逆

给出了态射的Drazin逆存在的条件及显式表达式，改进并推广了[1]、[2]与[3]中的一些主要定理。     

摄像型等厚干涉实验仪器的研究

介绍了“摄像型等厚干涉实验仪”的构造及等厚干涉实验新的测量方法。     

QIC-160等静压机自动控制系统的设计与实现

QIC-160等静压机是20世纪80年代初引进的国外成套大型设备，主要用于粉末成型产品的压制。设备最高工作压力达200MPa，温度可达120℃。设备从引进到现在已经20多年了，电器元件也已老化，鉴于该设备现在液压系统及主体运行还基本正常，故对原设备控制系统进行了设计更新。     

天体运行立法者开普勒

本文介绍了开普勒发现天体运行第二定律的发现过程。重点讨论了开普勒从一个神秘主义者到近代物理学家的变化，以及开普勒发现第三定律的实际过程（私人科学）与他公开发表描述过程（公众科学）的差别。     

Erds方程的全等解

本文运用初等方法给出了Erds方程的所有全等解.