一种改善La-Mg-Ni贮氢电极合金性能的方法

提出用放电等离子烧结技术(SPS)改善La-Mg-Ni贮氢电极合金的综合电化学性能.所选La-Mg-Ni贮氢电极合金为La0.7Mg0.3Ni2.5Co0.5.实验结果表明,用SPS和真空中频感应熔炼制备得到的合金具有近似的最大放电容量.SPS技术增强了合金电极的循环寿命:在经过150次的充放电循环后,用SPS法制备的La0.7Mg0.3Ni2.5Co0.5合金的容量保持率为61.8%;而感应熔炼法得到的合金电极的容量保持率仅为39.6%.同时用SPS技术使合金的放电中值电压增加,放氢平台变宽,平台倾斜度减小.     

Direct determination of trace silicon in lanthanum oxide by using a selective volatility and slurry sampling-FETV-ICP-AES

A new method for determination of trace sillicon in high purity lanthanum oxide by using electrothermal vaporization (ETV)-ICP-AES with polytetrafluoroethylene (PTFE) slurry as a fluorinating reagent has been proposed. Under the optimized experimental conditions, the fluorination reactions of analyte (Si) and matrix(La) with PTFE in the graphite furnace took place at high temperature, and the fractional volatilily between Si and La was observed. Based on this principle the matrix interference could be eliminated. The detection limit of Si was 4.0μg·L⁻¹, and the RSD was 3.4%(C=0.2mg·L⁻¹,n=10). The procedure proposed has been applied successfully to determine trace Si in La₂O₃ without any chemical pre-treatment. Supported by the National Natural Science Foundation of China Qin Yongchao: born in Dec. 1953, ph. D., Assciate Professor     

低温等离子体促进羊绒净洗的研究

为了开发和利用山羊绒,促进羊绒的净洗,我们用低温等离子体对它进行了处理。本文给出了实验结果,并初步分析了等离子体对羊绒纤维表面的作用。     

Transient reconnection caused by non-homogenous dynamic pressure

It is proposed that local and transient reconnection in the plasma boundary layer can be caused by the impact and switch-off of non-homogenous dynamic pressure. Magnetohydrodynamic simulation is used to investigate the reconnection processes in these two cases. It is found that if the inflow is homogeneous, the reconnection will not take place; if the inflow is a shearing flow, no matter how great the shear of the flow is, the reconnection can be caused either during or after the impacting period. It is pointed out that a sudden stop of external force may be an important triggering mechanism of energy transformation and reconnection in the plasma boundary layer region.     

X模耦合微波的ECR溅射装置的放电特性

探讨采用真空波导及反常波模式（X模）微波输入技术，以避免微波石英窗口的污染，并研究了这种微波耦合模式装置中等离子体的放电特性．     

Characteristics of self-focusing due to the pondermotive force in laser-plasma interaction

The Max’s equation of self-focusing in laser-plasma interaction due to the pondermotive force has been discussed and its physical meaning of the assumption has been predicted. The characteristics of selffocusing due to the pondermotive force with different initial situations have been analyzed through the numerical calculation. Supported by the Foundation of China Academy of Engineering Physics Zhang Yuesheng: born in 1975, Master graduate student     

相对论等离子体中的下混杂孤子

本文用相对论各向同性流体动力学方程,研究了磁化等离子体中横越磁场传播的非线性下混杂波,导出了下混杂孤子。     

双层辉光离子渗金属手用锯条工艺及切削性能

本文将介绍一种新型手用锯条——双层辉光离子渗金属手用锯条。在对已转入生产应用的离子渗金属手用锯条工艺过程及其主要工序进行分析的基础上，对批量处理４５００支连续稳定生产的锯条进行切削性能检测，结果证明该锯条切削性能不仅大大优于高碳钢锯条，而且与英国双金属手用锯条相当     

香叶木苷的血浆蛋白结合率研究

研究香叶木苷的血浆蛋白结合率．以体外方式，用平衡透析法模拟香叶木苷在大鼠体内与血浆蛋白结合的过程，并以高效液相色谱法测定香叶木苷在透析袋内血浆中的药物质量浓度与透析袋外缓冲液中的质量浓度，计算血浆蛋白结合率．香叶木苷在血浆中药物质量浓度为1～90μg／mL范围内，其与大鼠血浆蛋白的结合率范围为29．83％～32．56％，波动较小，结果可靠．香叶木苷属于低血浆蛋白结合率药物，大部分药物分子以游离形式发挥药效．