Fabrication Process of Sol-Gel Spin Coating for SrBi2Ta2O9 Films Applied to FeRAM

We investigate SrBi2 Ta2 O9 （SBT） films prepared by the sol-gel spin method with different spin rates or different anneal conditions for the first layer of SBT, as promising ferroelectric layer materials applied to ferroelectric random access memory （FeRAM）. All the specimens in this experiment have similar SBT crystal orientations of （115）, （020）, （220）, and （135）. The Pt/SBT/Pt capacitor with coating of 3000rpm spin rate has a perfect rectangle shape of hysteresis loops, remanent polarization of 7.571μC/cm^2 and coercive voltage of 0.816 V at 5 V voltage amplitude. These characteristics are better than those with coating of 3500rpm spin rate, which is attributed to the influence for thickness and grain size of the film from depressed spin rate. Slow-rate anneal in the furnace for the first layer of SBT can improve the crystallization processes and properties for SBT layers slightly, compared with rapid thermal annealing. The ion damage from etching for the top electrode can influence leakage current characteristics of the Pt/SBT/Pt capacitor at positive voltage bias.     

BIVARIATE ESTIMATION WITH LEFT-TRUNCATED DATA

1. Introductionffendomly truncated data frequently arise in medical studies; other application areas include economics, insurance and astronomy in a broad senses random truncation correspondsto biased sampling, where only partial or incomplete data are aVailable about the variableof interest. A typical realization. can occur as follows: Suppose that individuals/items experience tWO consecutive events in time, an initiating eveal at t and a terminating eveal ats. Usuajly, statistical niterest …     

Ce-5％La合金在空气中的表面氧化过程

采用拉曼光谱原位分析、扫描探针显微镜、扫描电镜和X射线能谱研究了Ce-5％（质量分数）La合金在空气中的氧化过程。     

二氧化锆中Er3+发光性质的研究

用固相反应法制备了Er^3 掺杂摩尔分数为1％的ZrO2材料；x射线衍射图表明该种材料为混合相晶体结构；用Nd：YAG激光器的三次谐波(355nm)和二极管激光器(980nm)为激发源激发样品，分别测量了它的发光和上转换发射，观察到了较强的绿光和相对较弱的红光发射。同时对该样品进行了剩曼光谱实验，发现该材料的晶格振动能量相对较小。通过分析发现低的声子能量和低的掺杂浓度是该样品发绿光的主要原因。     

利用UCDOS的特显功能为foxpro应用软件制作封面

特殊显示是ＵＣＤＯＳ向用户提供的物色功能之一，本文叙述了利用其特显功能为应用软件制作封面的方法，并就其显示速度问题进行了分析，提出了改进方法。     

Ground State Properties of New Element Z=113 and Its Alpha Decay Chain

We investigate the ground state properties of the new element ^278 113 and of the α-decay chain with different models, where the new element Z=113 has been produced at RIKEN in Japan by cold-fusion reaction [Morita et al. J. Phys. Soc. Jpn. 73 (2004) 2593]. The experimental decay energies are reproduced by the deformed relativistic mean-field model, by the Skyrme-Hartree-Fock (SHF) model, and by the macroscopic-microscopic model.Theoretical half-lives also reasonably agree with the data. Calculations further show that prolate deformation is important for the ground states of the nuclei in the α-decay chain of ^278 113. The common points and differences among different models are compared and discussed.     

当代激光颗粒分析技术的进展与应用

简要介绍了当代激光颗粒分析技术的最新主要的进展．内容涉及测试原理的发展、仪器结构的改进、数据处理技术的突破、多次散射的处理、样品分散系统的多样化、颗粒形状对测试的影响、颗粒散射模型、工业在线应用等一系列理论和应用问题．     

铜阴极溅射辉光放电在强短脉冲供电时的发射光谱研究

本研究工作以强短脉冲供电和直流供电时辉光放电的伏安特性为基础，详细研究了强短脉冲供电时的电流、脉冲频率、脉冲宽度以及Ａｒ气压力对原子线和离子线强度的影响。实验结果揭示了大电流强短脉冲供电时辉光放电发射光谱的现象。     

内层电子相关对NaH分子特征的影响

采用从头计算多参考组态CI方法(MRCI)研究了NaH分子的基电子态的内层电子相关对其分子特征的影响。计算了不同内层电子数目相关情况下的势能曲线，通过解析势能函数拟合，计算出了光谱常数。利用求解分子核运动薜定谔方程的方法，得出了振动能级。通过分析Na原子内层电子与价电子相互作用受H原子核影响的变化，对NaH分子的势能曲线、光谱常数和振动能级等特征量随相关电子数目的变化作了合理的解释。     

异戊二烯分子10a′轨道的电子动量谱

首次获得了异戊二烯分子10a′轨道的电子动量谱的实验结果，并与用Hatree-Fock方法和密度泛函理论计算得到的结果作了比较，实验结果和理论结果符合较好。