Simultaneous Elastic Recoil Detection Analysis of H and Other Elements in Foils

Hydrogen and other elements in SixNyHz foils have been simultaneously measured by using a single E（gas）- E（PSD） telescope and heavy ^127I ion beam in elastic recoil detection analysis （ERDA）. Hydrogen is measured in the non-coincidence spectrum of E（PSD）, and other elements from the △E - E coincidence spectrum. The composition and depth profiling of the foils are obtained from the simulated spectra.     

Spectroscopic Study on the Interaction of Al^3＋ with Flavonoids and BSA

The interaction of Chinese herbal medicine component flavonoids(morin and rutin)with trivalent aluminiumion and the complex of aluminium ion and Bovine Serum Albumin in Hank's artificial simulate body fluid wasstudied using UV-Vis absorption spectra.The result showed that morin and rutin could conjugate with Al~(3 ) inHank's artificial simulate body fluid.It was found that morin and rutin could competed with the complex of alu-minium ion and Bovine Serum Albumin for aluminium ion.The mechanism of flavonoids and Bovine Serum Al-bumin compete aluminium ion was discussed,and the constant of rutin complex with aluminium ion was calculated.     

汽轮机湿蒸汽级中凝结流动的三维数值分析

对一台凝汽式汽轮机低压末三级中的湿蒸汽自发凝结流动进行了三维数值分析,并与忽略自发凝结影响的流动计算结果进行了比较。结果表明,自发凝结流动中,湿蒸汽级组内焓降在各级之间的分配、各级反动度、级的工作压力范围、叶栅出口气流角和出口气流速度发生明显变化。各湿蒸汽级处于“变工况”运行状态,部分湿蒸汽级内流动状况显著变差,并导致叶片强度与振动方面安全性降低。除非平衡凝结损失外,凝结导致湿蒸汽透平级“变工况”运行是湿蒸汽级效率降低的重要原因。     

GH-927网络炸药配方

GH-927网络炸药是一种由敏化处理后的黑索金（RDX）为主炸药，弹性高聚物为粘结剂组成的可曲挠炸药。其特点是可以实现小直径、多拐角和大长径比传爆延时，主要用于常规战斗部起爆传爆序列装药，如鱼雷起爆器和爆炸逻辑网络装药。2003年研制了以RDX为基的两种网络炸药配方，2004年通过对比论证，确定了一种以RDX为基的GH-927炸药配方，并考察了该炸药的综合性能。     

氢化物发生原子荧光光谱法测定三七中的砷

采用硝酸、高氯酸混合酸消解试样 ,氢化物发生原子荧光光谱法测定三七中的砷 ,并对仪器的工作条件、盐酸、还原剂用量、共存元素的干扰进行了试验。方法的检出限为 7.4 ng· g-1;测定精密度为 4 .67%— 7.0 1 % ;回收率在 97%— 1 0 1 %之间     

Linear and Nonlinear Optical Properties of Quasicrystals

An investigation is carried out on the linear and nonlinear optical properties of quasicrystaJs. The linear and nonlinear susceptibilities are determined for two- and three-dimensional ctuasicrystals. The results show that for optical linearity, two-dimensional quasicrystals are uniaxial, while icosahedral quasicrystals are optically isotropic. Meanwhile all ctuasicrystals, except those with 5, 5m, N, Nmm (N = 8, 10, 12) symmetries, have no the firstorder optical nonlinearity. The tensor scheme of the first order nonlinear susceptibility is the same for these eight exceptional kinds of quasicrystals.     

基于Euler网的企业流程建模方法研究

本文主要介绍了基于离散事件系统的 Euler网建模方法 ,Euler网方法是在活动周期图方法的基础上 ,以图论和网论为描述语言的一种建模方法 ,它可以较好地支持生命周期 ,能够充分反映企业不断改进和扩展的过程 ,因此本文采用 Euler网方法对企业流程建模进行了重点研究 ,为企业建模提供了新的思路 .     

发挥“三算结合”教学实验优势大面积提高小学数学教学质量

北安市铁东小学于1987年秋开始“三算结合”实验，目前1-5年共3个班，学生112人。九二年七月份，在全市首届“三算结合”实验班毕业统考中，数学平均成绩85．4分，优秀率71%，及格率98.7%，成绩居全市城乡五年制小学毕业班第一名，76名学生全部以优异成绩升入初中．