基于移动agent的分布式仿真体系框架研究

基于HLA(high level architecture，高层体系结构)的分布式仿真技术是国内外研究的重点。文中依据原有的HLA分布式仿真体系架构的一般特征，设计出基于移动agent的分布式仿真体系框架。在设计中引入了各类功能各异的移动agent，让这些agent分布在仿真节点和联邦中，承担传统HLA体系中的RTI接口规范．协助实现仿真系统功能。移动agent技术的引入，有助于整个系统加强规范性，提高复用性，增加互操作性。     

HLA战场虚拟环境仿真框架研究

高层体系结构(HLA)的出现为分布式仿真提供了新的技术支撑．有效地利用HLA为虚拟战场环境仿真服务,需对战场环境的描述方法和开发方案进行系统的研究．分析了基于HLA构造分布式虚拟战场环境的优越性,提出了有利于提高仿真逼真度、增强用户沉浸感的新的战场环境描述方法,给出了分布式虚拟战场环境研究框架,重点讨论了开发所涉及的几个关键问题,包括联邦成员、系统结构、仿真对象模型(SOM)和联邦对象模型(FOM)．实验和系统联调表明,该分布式虚拟战场环境仿真系统可以实现与其他作战实体仿真成员的正确交互,基本满足作战仿真需求．     

基于XMSF 的预警探测仿真系统

针对高层体系结构(HLA)在不同厂商运行支撑环境(RTI)之间交互问题,以及下一代分布式仿真标准可扩展建模与仿真架构(XMSF),提出了一种基于XMSF的预警探测仿真系统。首先,介绍了XMSF 及其对HLA 的扩展;然后,分析了预警探测仿真系统的功能需求,并设计了该系统的功能框架图;最后,分析了仿真模型、基于数据分发服务(DDS)的运行框架、桥接代理、基于Web 服务的扩展等关键技术。     

基于HLA/pRTI1516和OPNET的航空战术数据链仿真系统

将HLA分布式仿真技术与OPNET网络仿真平台相结合, 设计了一种基于HLA/pRTI1516和OPNET的航空战术数据链分布式仿真系统;解决了OPNET不支持HLA底层支撑软件pRTI1516的问题, 实现了OPNET的pRTI1516的通信接口, 完成了外部仿真系统联邦成员与OPNET仿真平台的数据交互, 以及外部仿真实体节点在OPNET中的建模和仿真分析。通过这个系统测试了Link16网络协议JTIDS的性能, 验证了系统的可行性。     

基于HLA的仿真程序设计研究

在分布式交互仿真中,高层体系结构HLA以其灵活性、开放性和突出的互操作和重用性成为当今的分布式交互仿真的标准IEEE1516。研究基于HLA的程序设计方法对于开发分布式交互仿真系统具有重要意义。本文从HLA的对象模型模板(OMT)和接口规范实现的运行支撑环境(RTI)所提供的6种服务入手,结合相应设计实例,给出了设计的步骤和一般方法。     

分布式仿真网格技术简析

分布式仿真在面对向大规模发展及需要使用分布式计算资源和数据资源时,存在一定的局限性。分布式仿真网格是刚刚起步的新兴技术,致力于将传统的分布式仿真移植到网格环境中,以利用网格技术的各项优势。文章介绍网格技术及分布式仿真网格的发展与应用现状,论述分布式仿真网格技术基本概念及关键技术,分析其面临的问题,展望其发展方向。     

基于CCA模型和OGSI架构的XCAT开发

针对大规模并行超级计算的通用构件体系结构(Construction Component Architecture,CCA)并不能适用于网格环境中的问题,在分析CCA面向分布式网格应用构件框架在时间和空间上的结合与实现技术的基础上,首先提出了开发基于CCA模型和开放网格服务基础设施(Open Grid Services Infrastructure,OGSI)上的分布式网格应用构件(Extreme Cluster Administration Toolkit,XCAT)的思想,以此实现构件之间的无缝互操作,介绍了该技术的实现方案及构件的组合方法,并做了简要分析,最后举出了应用实例。     

基于HLA OMT的通信对抗建模仿真

传统的通信对抗仿真都采用面向对象(OO)方法建模仿真。这种仿真技术随着IEEE HLA3.1建模和仿真通用性框架协议产生已经不适应当今仿真需求。针对HLA建模和仿真技术,着重介绍基于HLA OMT建模的一种新的思路,实现通信对抗建模仿真。     

分布式仿真技术及其靶场应用前景研究

主要对分布式交互仿真DIS、高层体系结构HAL和基于Web的分布式仿真等3种分布式仿真技术进行了简单的介绍，并对分布式仿真技术在靶场的应用前景以及目前应注意开展的工作进行了阐述。     

基于HLA的电子战分布仿真环境设计

HLA是当今国际仿真界通用的体系结构，它通过IEEE标准定义了仿真框架与规则、成员接口规范以及对象模型模板规范，但是如何在这套规范上设计为电子战服务的分布式仿真环境却没有标准可寻。通过对HLA的研究和实践，本文尝试提出基于HLA的电子战分布式仿真环境设计的思路、规范与标准、功能要求，并以正在建设中的仿真环境为例，进行说明。     

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.