SrFCl:Eu~(2+)晶体的电子自旋共振谱研究

用程序降温法生长了SrFCl:Eu~(2+)晶体,并测量了它的电子自旋共振谱。应用最小二乘法拟合技术对g因子及自旋哈密顿参数进行了精确拟合。报道了各向异性的g因子及有关自旋哈密顿参量。发现并归属了Eu~(2+)的高阶禁阻跃迁。     

ZrO_2纳米微粒红外振动特征

测定了单斜ＺｒＯ_２纳米材料在各种粒度下的付里叶变换红外光声光谱（ＦＴ—ＩＲ—ＰＡＳ），发现随粒度的减小，大部分的谱线位置蓝移，而有些谱线的位置红移，同时在不同频段，有的强度增强，有的强度减弱甚至消失。研究了量子尺寸效应和介电限城效应对其光学特征的影响，对观察到的物理现象进行了物理机制探讨     

吲哚化合物的光化学——Ⅲ.薄层层析—光度法对2—苯基吲哚敏化光氧化反应体系的定量分析研究

本文为2—苯基吲哚(1)的光氧化反应体系建立了一种薄层层析—紫外分光光度定量分离分析方法。该法灵敏、简便准确度和精密度均好。     

Brdicka溶液中β_2—微球蛋白和巯基乙酸的检测

本文首次研究了β_2—微球蛋白和巯基乙酸在Brdicka溶液中产生灵敏“活性钴”催化电流的条件,并在此基础上分别测定了二者的最低检测限和线性范围。实验表明:利用该催化电流进行伏安免疫检测(VIA),其灵敏度将不亚于传统的放射免疫检测(RIA),同时,该法还具有简单、快速、可均相测定的优点。     

B值随机变量序列部分和的矩的收敛速度

本文讨论2阶一致光滑空间及2型空间中随机变量序列部分和的矩的收敛速度问题,所得定理推广了Chow的结果。     

基于DirectX的视频编程

介绍了采用DirectX技术的微机上进行视频编程的原理，并给出了视频叠加的应用例子。     

全球化知识经济潮流与两岸未来教育发展趋势（Ⅱ）——以指标评价为基础的检证观点

3．3评价结果 3．3．1多元尺度法 (1)评价对象 1)检定值 依据多元尺度法分析结果，采三维构面进行17个评价对象的空间配置，压力系数可达0．03769．R^2为0．98917，介于“非常好”与“好”之间；若采二维构面进行空间配置，则压力系数值为0．14148，介于“还可以”与“不好”之间(参表2)，R^2为0．89671．     

Resource Search in Unstructured Peer-to-Peer System Based on Multiple-Tree Overlay Structure

We propose a multiple-tree overlay structure for resource discovery in unstructured P2P systems. Peers that have similar interests or hold similar type of resources will be grouped into a tree-like cluster. We exploit the heterogeneity of peers in each cluster by connecting peers with more capacities closer to the root of the tree. The capacity of a peer can be defined in different ways （e.g. higher network bandwidth, larger disk space, more data items of a certain type etc.） according to different needs of users or applications.     

Joint Strength with Soldering of Al2O3 Ceramics After Ni-P Chemical Plating

Ni-P alloy was chemically plated on Al2O3 ceramics to produce uniform alloy coatings at temperatures below 70~C. Cu metal was electroplated onto the Ni-P coating to facilitate the soldering and shorten the chemical plating time. Then, the electroplated ceramic specimens were soldered with 60 wt.% Sn-40 wt.% Pb solder in active colophony. The highest shear strength was acquired after the heat treatment at 170℃ for 15 min. The joint fractures mostly propagated along the interface between the ceramics and the Ni-P coating, with some fracture in both the ceramics and the Ni-P coating near the interface and some along the interface between the Cu and Ni-P coatings. The results show that ceramic surface roughness and the chemical plating parameters influence the coating quality, and that suitable heat treatment before the soldering also improves the adhesion between the ceramics and Ni-P coatings, thus strengthening the joints.