Influences of Thalliation on the Morphology and Critical Temperature of Tl2Ba2CaCu2O8 Thin Films

Tl2Ba2CaCu2Ox(Tl-2212) thin films were prepared by the two-step technique.A precursor film was first prepared by the pulsed laser deposition method,and then experienced the incorporation of thalliation in a one-step or two-step annealing process.The experimental results show that the two-step annealing process produces dense and smooth films,and that the one-step annealing process produces a high critical temperature film of 101K,but the transition width is wide.Precursor films with homogeneous Ba2Ca1.3Cu2.1Ox composition are essential for producing high-quality Tl-2212 films.     

Identical Superdeformed Bands in ^171Ta and ^173Re

The rotational band built on the i13/2 proton [660,1/2] Nilsson state in ^173Re is proven to be identical to that in ^171Ta.The close similarity of the two bands in ^171Ta and ^173Re suggests that the ^173Re nucleus with the odd proton based on the i13/2 [660,1/2] Nilsson state may be triaxially superdeformed.     

Equation of State of Dense Liquid Nitrogen in the Region of the Dissociative Phase Transition

We have measured the equation of state for liquid nitrogen compressed dynamically to a pressure of 10-60 GPa by employing a two-stage light-gas gun.The data show a continuous phase transition above the shock pressure of 33GPa,as indicated previously by shock wave experiments.A theoretical model has been derived to examine the experimental data by inducing a molecular dissociative fraction.According to theoretical and experimental date the phase transition was thought to be a molecular dissociative phase transition.     

Hydrogenation Properties of Zr Films Under Various Conditions of Hydrogen Plasma

The hydrogenation properties of Zr samples with and without an Ni overlayer under various plasma conditions were investigated by means of non-Rutherford backscattering and elastic recoil detection analysis.The theoretical maximum hydrogen capacity,66.7 at%,could be achieved at a hydrogen absolute pressure of-2Pa and a substrate temperature of-393K for a plasma irradiation of only 10min;this was significantly greater than that for gas hydrogenation under the same hydrogen pressure and substrate temperature.It was also found that the C and O contamination on the sample surface strongly influences the hydrogenation,and that the maximum equilibrium hydrogen content drops dramatically with the increasing total contamination.In addition,the influence of the Ni overlayer on the plasma hydrogenation is discussed.     

复合型模糊控制技术在电力系统稳定器中的应用

针对传统电力系统稳定器的缺点，以提高系统抗部干扰和内部参数变化的鲁棒性以及提高稳态控制精度为原则，提出了复合型模糊电力系统稳定器的设计方案，理论分析及仿真结果均表明所提出的方案正确可行并具有良好的性能。     

从家乐福超市在东南亚市场的发展看零褒业的全球化

近些年来，零售业国际化持续的增长势头，已广泛地引起了人们的注意，同时，零售业是中国加入WTO后开放程序非常高的一个行业，其全球化的经营方向势不可挡，本文首先阐述了零售业全球化的历程，简介了东南亚市场的特点；在后通过对家乐福超市在这一地区发展的介绍，通过对零售业要进行全球化所面临的挑战的分析，总结，指出了零售业在全球化的发展过程中，应采取的措施，方法，可能出现的问题以及发展的趋势。     

基于COMPAQ产品的容错系统

以COMPAQ产品为例，给出了几何可实行实用的数据容错系统方案。并详细介绍了磁盘阵列管理系统和服务器自恢复系统的组成、功能及特点。同时，结合计算机网络数据信息容错系统的应用，提出了解决系统随机故障和后台数据重建的两种方法。在计算机网络信息系统中，为防止服务器数据系统灾难的发生提供了解决措施。     

液体可视图象序列中杂质小目标的检测方法

在分析红外图象和视图象差异的基础上，研究了一种适用于可视图像序列的运动小目标检测算法。受目标影响的象素点具有较弱的时间相关性，即相对普通象素点有较大的时间方差，根据此特征，用管道更新的方法产生新方差图象序列，再用管道更新的方法累积，增加信噪比，然后用基于统计均值的自适应门限方法分割出目标，最后将原图象的梯度倒数作为象素点强度的加权，有效地抑制灰度突变边界的传感器噪音，保存目标点。     

Photoeletricity Capability of Imager Detector with Coated Blends of Polymer and Perylene or Coronene

Perylene and coronene have been synthesized with good yield via the Dields-Alder reaction.They have good photoluminescence properties and could transfer ultraviolet light to visible-loght.To find an easy way of making a better ultraviolet charge coupled device,we blended perylene or coronene with polymers.Then,these blends were analysed by the photoluminescence spectrum.The results indicate that the blends have larger fluorescence intensity than pure perylene or coronene.Through spreading these blends on image detectors,organic image detectors with good ultraviolet photoelectricity capability were prepared.