MPEG-4形状编码器二进制运动估计的VLSI结构设计

阐明了所设计的二进制运动估计的VLSI硬件结构.首先介绍了MPEG-4形状编码中BME的基本原理,以及前人设计的一种DDBME结构;接着分析指出DDBME在利用数据冗余方面的缺陷,并给出了一种改进的运动估计结构,通过扩大PE阵列以及重新安排数据的分发机制,可以达到75%的数据利用率.硬件仿真结果与软件运行结果的对比表明了本设计的正确性,综合结果也说明了本设计可以在最低5.93 MHz的频率下满足MPEG-4 Core Profile & Level2的实时编码,可用于MPEG-4的VLSI实现.     

权集保护自适应滤波算法的研究

针对自适应滤波算法中稳健性和灵敏度之间的矛盾，本文提出了一种典型权集保护的方法，并在误差聚类和欧几里德最小距离选优的基础上，构造了一种算法结构。在此算法结构中，传统的FIR自适应滤波算法被推广为粗调和细调两个过程。最后，在信道均衡器仿真实验中，验证了这种算法结构在抗突发扰动和降低跟踪差方面的优良性能。     

一个符号神经网络的学习算法

本文首先根据神经科学和认知科学的研究，提出了一种符号神经网络结构，该结构溶符号机制和神经网络于一体，然后在此基础上研究了其学习算法，该算法结合神经网络ＢＰ学习算法和符号机制中学习算法的特点；最后通过实验，证实该算法的可行性和先进性。     

多尺度地形结构提取方法

在地形分析中，地形结构特征的研究具有重要的意义，文章将三维地形看成一种多层次的嵌套结构，采用小波分析实现了地形的多尺度表示，并根据三维地形数据本身的特点，发展了两种多尺度地形上的地形结构线提取算法：结构算法和流水算法。文中最后给出了部分实验结果。该算法实现简洁，速度快，效果好。     

基于水印结构的脆弱性数字水印技术

文章基于Yeung—Mintzer脆弱水印算法，提出一种新颖的水印结构处理技术．可用于数字图像完整性认证的脆弱水印算法，并可以解决原有算法所存在的安全问题。由于采用空域中嵌入水印的方法．该算法具有良好的局部检测性能。理论分析和实验结构证明了水印结构处理技术的有效性。     

血管数字减影图象中的结构特征提取

基于Ｘ线数字减影图象的三维血管结构重建很大程度上依赖于图象中血管的有效检测和结构关系描述。本文给出一个在局部特征检测基础上的结构特征提取和组织方法，涉及结构分析之前的中间视觉处理层次，即将图象中主要结构分离出来供结构分析之用。首先用一个突出结构检测算法独立地组织和选择中轴曲线片断和边缘曲线片断，然后将两者信号相结合以验证突出结构算法获得的结果并滤除噪声结构。     

基于面积的LUT结构FPGA的工艺映射

提出了一种基于面积的针对ＬＵＴ结构ＦＰＧＡ的工艺映射算法。该算法在映射的过程中充分利用了网络节点的属性，通过计算节点的参数，采用线性规划方法给出网络的目标函数和约束条件，把一个电路网络的问题转化为纯数学的规划问题求解，映射问题转化为节点属性的分配问题，来得到最后的映射结构。与其它算法相比，该算法的映射结构较优。     

Crossbar交换结构高性能调度算法研究

文章对高速路由器交换技术中普遍采用的Crossbar交换结构的各种主要调度算法进行了分类阐述和对比分析，讨论了调度算法的基本问题，主要分析了最大匹配类算法和权重匹配类算法两种目前的主流调度算法，最后对高性能调度算法研究的最新进展进行了介绍。     

面向密码算法的异步可重构结构设计

针对FPGA和ASIC在实现密码算法时的不足之处，本文介绍了一种面向密码算法的异步可重构结构。该结构的运算功能由一个可重构单元阵列提供，数据通路由可重构单元之间的相互连接实现，异步通信采用握手信号完成。在分析握手信号传输延时对可重构结构的影响后，文章提出了一种适合该结构的单元信号传输握手控制电路。同时在单元结构中，使用改进的DSDCVS逻辑来设计其运算电路，减小了单元的面积，提高了单元的工作速度。应用实例表明，在实现密码算法时，面向密码算法的异步可重构结构表现出了比FPGA更好的性能。     

面向实时视频压缩的单片硬件结构

从视频信号的特征出发，简要说明了实时视频压缩的常用算法及其国际标准。通过系统地分析了视频压缩算法中内在的模块特性和并行特性，结合数字信号处理领域中具有并行实现机制的典型硬件结构，得出了可用于实时视频压缩的两种单片硬件结构模型。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.