Quantum—Confined Stark Effect of Vertically Stacked Self—Assembled Quantum Discs

We study the electronic energy levels and probability distribution of vertically stacked self-assembled InAs quantum discs system in the presence of a vertically applied electric field. This field is found to increase the splitting between the symmetric and antisymmetric levels for the same angular momentum. The field along the direction from one disc to another affects the electronic energy levels similarly as that in the opposite direction because the two discs are identical. It is obvious from our calculation that the probability of finding an electron in one disc becomes larger when the field points from this disc to the other one.     

业界快讯

<正>应用材料公司推出新Carina系统克服高k介电常数/金属栅极刻蚀难题应用材料公司推出Centura(r)Carina(tm)Etch系统用于世界上最先进晶体管的刻蚀。该系统能提供45nm及更小技术节点上采用高k介电常数/金属栅极的逻辑和存储器件工艺扩展所必需的材料刻蚀轮廓,是目前唯一具有上述能力并可以用于生产的解决方案。这套系统高性能的关键之处在于其拥有知识产权的高温阴极。高温工艺可以提供平坦垂直的轮廓,不会产生传统温度工艺下带来困扰的高k介质材料残留和硅材料凹陷。     

Optical spectra and Exciton State in Vertically Stacked Self—Assembled Quantum Discs

We study the oscillator strengths of the optical transitions of the vertically stacked self-assembled InAs quantum discs.The oscillator strengths change evidently when the two quantum discs are far apart from each other.A vertically applied electric field affects the oscillator strengths severely.while the oscillator strengths change slowly as the radius of one disc increases.We also studied the excitonic energy of the system.including the Coulomb interaction.The excitonic energy increases with the increasing radius of one disc.but decreases as a vertically applied electric field increases.     

能不忆江南

每个人心中都有一个江南，自居易笔下的江南是满目桃红柳绿，旖旎风光：“江南好，风景旧曾谙,日出江花红胜火，春来江水绿如蓝，能不忆江南。”戴望舒笔下的江南是湿漉漉，春雨的街头，撑油纸伞哀怨的姑娘。在江南人心中，江南是一种意境，是粉墙黛瓦，是小桥流水，是吴侬细语，是摇啊摇，摇到外婆桥的童谣。星文唱片眼中的江南是什么样子的呢？     

基于自相关的激光编码解算

分析了半自主激光制导武器的激光编码规律，提出了运用自相关技术对激光编码进行解算。通过仿真试验验证，运用该技术可准确预测、精确同步复制敌方激光编码，并形成有效的激光诱饵，达到全程自适应干扰的目的。     

回归模型中异方差或变离差检验问题综述

回归模型的异方差或变离差检验是统计诊断的重要课题。本文系统介绍了普通回归模型、广义回归模型和基于纵向数据的随机效应或自相关回归模型的异方差检验或变离差检验的研究概况和最新进展；同时介绍了作者关于非线性回归模型的相应工作，最后指出了若干有有待进一步研究的问题。     

Application of CPLD in CSR Control System

CPLD is the complex programmable logic device. The logic function of CPLD can be changed by different; program. The applications of CPLD have not only simplified the circuit‘s design and reduced its costs, but also enhanced the reliability and secrecy of the system. Here we introduce an example of the CPLD‘s implementation in the CSR control system.     

基于选择性多分辨率Kohonen网络的自适应灰度图像分割方法

针对多阈值分割中存在的问题,提出一种新的基于测量空间的空间聚类方法,即基于选择性多分辨率Kohonen网络的自适应灰度图像分割方法.算法的优点在于不需预知图像分割级数,而能够动态地根据图像局部特性决定.实验证明该方法具有良好的适应性.     

Bergman－Weil积分公式的拓广

本文把Ｃｎ空间中著名的Ｂｅｒｇｍａｎ－Ｗｅｉｌ公式拓广到一类具有低维解析待征流形的微分多面体域上，从而获得在一类非解析的多面体域上建立具有全纯核的全纯函数的积分表示式．