Studies on NaXe Clusters

In this paper all NaCl crystal samples containing metallic sodium colloids used in experiments were cleaved to ~1mm thickness from a block of NaCl single crystal at room temperature1,2. Two parallel large surfaces of each crystal were polished. Then these NaCl crystal specimens were implanted at 10-6 Torr with xenon ions using an accelerating voltage of 36 keV. The xenon ion fluences were in the range from 1(1015/cm2 to 7(1017/cm2. The chemical shifts of 23Na in these NaCl crystal specime…     

Elman动态递归神经网络在陀螺仪系统建模中的应用

本文针对Ｅｌｍａｎ 动态递归神经网络的特点,提出了一种基于Ｅｌｍａｎ 动态递归神经网络建立陀螺仪系统模型的方法。文中给出了Ｅｌｍａｎ 网络的网络结构和学习方法,并对建立起的网络模型进行了仿真,仿真结果表明,该方法是可行的。     

GC-MS测定桔子皮中的挥发性成分

桔子皮经水蒸汽蒸馏,乙醚萃取挥发性成分。通过气－质联用（ＧＣ－ＭＳ）测定,发现桔子皮中含有３８个组分,确定了其中２３个组分的结构。     

POPULATION TRAPPING IN MULTI-LEVEL SYSTEM VIA QUANTUM INTERFERENCE

Population trapping via quantum interference in a multi-level system driven by a coherent field is investigated. The influences of the alignment of the transition dipole moments and the energy-level separation of the upper levels are taken into account. Detailed trapping population profiles under the different conditions are given. The research result is helpful for simplifying the theoretical model and selection rational energy level system.     

多吡啶-铜(Ⅱ)-L-α-氨基酸配合物与DNA的作用

应用电子吸收光谱、荧光光谱、粘度测定及琼脂糖凝胶电泳法研究了多吡啶-铜(Ⅱ)-L-α-氨基酸型配合物:[Cu(TATP)(L-Val) (H2O)]ClO4·0.5H2O (1)、[Cu(IP)(L-Val)(H2O)]ClO4·1.5H2O (2) 、[Cu(TATP)(L-Tyr)(H2O)]ClO4·H2O(3)...     

反相高效液相色谱法对秦岭21种蕨类植物中槲皮素与山柰酚含量的测定

运用反相高效液相色谱(RP/HPLC)法对21种蕨类植物中槲皮素、山柰酚的含量进行测定。使用Shimadzu C18(250 mm×4.6 mm,5μm)色谱柱,以甲醇-水溶液为流动相进行等度洗脱,流速1.0 mL/min,检测波长360 nm,进样量20μL,柱温28℃。各对照品的质量浓度与色谱峰面积线性关系良好,具有较好的精确度和重复性,槲皮素、山柰酚的加标回收率分别为93%和95%。采用该方法分别对采自秦岭的21种蕨类植物的地上和地下部分进行测定,地上部分有19种含槲皮素、15种含山柰酚,其中毡毛石韦中槲皮素含量最高(2.11 mg/g),蜈蚣草中山柰酚含量最高(19.80 mg/g);而地下部分除有边瓦韦、大瓦韦含槲皮素(含量分别为0.11、0.12 mg/g)外,其余根状茎中几乎没有这两种黄酮类化合物;表明槲皮素与山柰酚在蕨类植物的地上部分广泛存在。     

维基(Wiki)网站在物理实验教学中的作用

实验中心的网站要求展现的知识点多、更新快、功能强,是物理教学的重要组成部分.文章介绍了复旦大学物理教学实验中心使用基于维基(Wiki)的网站系统~([1]) 在建站、运行和维护等方面的经验,以及维基网站在物理实验教学中的作用.     

Investigation of the segregation on a Fe-3.5at% Si bicrystal with AES and SAM

A fundamental investigation of transport phenomena involved in the surface segregation in polycrystalline systems has been performed, studying a Fe-3.5at% Si bicrystal with one (001) and one (011) oriented surface, separated by an asymmetric grain boundary. The segregation kinetics of Si, P and S was investigated by means of AES (Auger electron spectroscopy). A combined mechanism of bulk diffusion and diffusion across the grain boundary was found to be responsible for the complex segregation behaviour.     

微束X射线荧光分析

用能量色散微束X射线荧光分析仪实际测量了微束准直器孔径和X射线强度对微束空间分辨率的影响,在准直器孔径为0.1mm条件下,获得以FWHM定义的空间分辨率最好为0.073mm。通过微束扫描测量出某硫化锰矿微区内的Mn、Fe、Zn、Pb的三维等高线荧光强度分布图和不同小区域内的能谱。     

A multisource image processing environment in surface analysis

To use data from a number of different surface analytical instruments (such as SAM, SIMS, STM, EPMA, AFM)¹ in a synergistic manner, the problem of interchangeability of surface analytical data as well as that of multi-method analysis has to be solved. Starting from the measured images being stored in a standardized format, a preliminary set of low-level data processing routines based on the software packages Khoros [1] and HDF² [2] has been implemented. The aim is to standardize the storage as well as the processing of the images or spectra. A first version is presented.