基于OWL－S语义栅格运动目标信息快速分发技术

运动目标的跟踪打击需要情报部门实时接收多源信息，同时目标信息的订阅部门也需要在有限时间内从情报部门订阅并快速获取此类信息。这些信息包括实时变化的遥感图像、坐标位置等各类参数数据，数据量大、分类繁多，而各类信息的使用部门所应用的系统技术体制、数据格式及传输方式也不尽相同。文中提出一种基于栅格和P2P网络分发拓扑结构下，设立情报部门统一的信息分发系统。使用OWL—S语言对获取的多源目标信息进行语义分类描述和本体建模，通过多Agent协同进行兴趣识别、语义推理和信息匹配过滤，最终通过判断负载均衡进行路由选择，以满足大规模订阅需求的信息同步分发。     

网络化条件下的态势信息分发与Pub/Sub通信范型

探讨了网络化条件下态势信息分发的概念和机制.首先介绍态势信息分发的现状并分析其存在的不足;其次将发布/订阅(Pub/Sub)通信范型引入网络化态势信息分发机制之中,提出基于Pub/Sub网络化态势信息分发机制,分析其合理性和有效性;最后根据未来网络化战争的发展方向,预测其发展趋势.     

发布／订阅机制在协同作战系统中的应用

基于数据链网络构建了协同作战系统,该系统通过协同处理机分发战场态势和需求信息,实现了协同作战能力。根据系统以数据为中心的数据处理特点,采用了发布/订阅机制。搭建了协同作战系统框架,以实时数据分发中间件作为软件适配层,并利用其服务质量(QoS)机制满足了复杂的战场信息传输需求。     

虚拟现实技术在电子显微镜操作模拟中的应用

基于虚拟现实技术对电子显微镜外观结构及其操作流程进行虚拟动态仿真。首先运用三维建模软件对电子显微镜进行精细建模,并对其中涉及到的关键问题,如模型优化、材质制作等进行了阐述。在此基础上,研究运用虚拟现实引擎对电子显微镜的操作流程模拟进行了设计与实现。采用这种的模拟系统,用户可以在虚拟环境下直观、交互地了解电子显微镜的复杂结构,并体验电子显微镜的操作流程。该项工作对电子显微镜的三维动态展示、使用流程演示、用户体验式培训都具有很好的应用意义。文章给出了实例和可视化结果。     

联合作战密钥分发架构设计

以联合作战使命任务需求为牵引,基于作战网络模型,提出了密码信息网络和密码任务群组概念;作战网络的动态性导致了密码任务群组的不确定性,从而增大了密钥的生成与分发难度。利用复杂网络的邻接矩阵机理设计了密码任务群组的计算方法,并对密码态势认知、密码网络建模、密钥的生成和分发路径等关键环节进行了分析研究。结合信息化条件下联合作战指挥特点,设计了分发流程和架构,实现了密钥自动生成和灵活动态调整,解决了特定战斗任务之不确定性、多样性和复杂性带来的密钥分发难题。有效提高了密钥分发科学化和规范化水平,为密钥分发系统与指挥信息系统的深度融合、与作战系统和通信网络系统的自动协同筹划奠定了基础。     

偏馈栅格天线的栅面误差分析与仿真

研究了某偏馈栅格天线的栅面误差仿真技术。在分析栅格天线装配过程基础上,建立了其反射面装配的仿真模型,并对栅支板中心圆孔位置误差、栅条穿入误差和栅面误差进行了建模与仿真计算。对影响栅面精度的关键因素进行了讨论和优化。通过对比实验,验证了仿真结果的合理性。     

基于Yaksha密钥托管机制的命名数据网络内容发布/订阅系统

命名数据网络（NDN）允许内容生成者的数据缓存于网络任何位置,这种数据和数据源分离的网内缓存机制导致的结果是以主机为中心的端到端认证数据传输不能用于命名数据网络。目前提出的NDN内容传输机制要求依赖内容分发网络（CDN）或要求数据源始终在线,然而这些要求不适合移动自组织网络环境。针对这一问题,首先基于ElGamal公钥密码体制设计了一种新的Yaksha系统,然后,基于新的Yaksha系统提出了命名数据移动自组织网络内容发布/订阅系统EY-CPS。EY-CPS系统中,Yaksha服务器分配和管理网络上传输内容的加/解密密钥,在不存在CDN或数据源离线的情况下,内容消费者也能访问网络上缓存的内容;另外,通过仅给合法用户发放内容发布/订阅“许可”,保证仅合法用户向网络发布内容或访问网络上缓存的内容;最后,在安全系统逻辑LS2中建模并分析了EY-CPS系统的安全性,并对相关方案作了分析比较。     

基于Agent的复杂系统建模与仿真研究

基于Agent建模与仿真克服了传统的建模技术存在的不足,为复杂系统研究提供了新的思路.在基于Agent的复杂系统建模方法分析的基础上,结合信息对抗环境下护航舰艇编队防空作战系统实例,设计了各个仿真Agent实体的模型结构,采用HLA/RTI作为多Agent仿真环境的支撑环境,在此基础上给出了系统仿真的逻辑结构和仿真流程...     

SLM—一种安全分层组播协议

流媒体分发的一种典型实现方法是采用具有接收方驱动拥塞控制机制的分层组播.由于目前分层组播拥塞控制协议缺乏对用户行为的限制,接收方可违规订阅上层组播组发起自利型攻击,导致非公平的带宽利用.本文提出了一种较通用的安全分层组播协议SLM(Secure Layered Multicast).在路由器辅助拥塞控制条件下,在边界路由器采用基于Shamir秘密共享体制的拥塞状态相关访问控制(CR-AC,Congestion state Related Access Control)算法,管理用户组订阅行为,避免了用户自利型攻击,并使服务提供商可根据其与用户的协约限定不同用户的最高订阅级别.分析和仿真实验表明,该协议可实时保证网络流量安全共享带宽并具有较好的可扩展性.     

战术数据链支撑环境建模方法研究

战术数据链系统,凭借统一的通信协议实现了传感器平台、武器平台、指控平台的互联互通互操作,显著提高了信息分发效率,提高了作战系统的整体效能,已成为作战行动的有力支撑。然而,由于数据链系统作战运用涉及的人员多、装备多、覆盖地域广,从而导致数据链系统的实装演练难以开展,作战训练难以组织。基于此背景,对数据链网络与作战环境的关系进行剖析,对数据链网络支撑作战的模式进行了研究,并对数据链网络支撑环境模型的基本结构以及建模基本方法进行了研究。     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

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.     

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.     

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.     

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.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.     

GaAsSb/InAlAs PA DHBTs Grown by Production MBE

The epi material growth of GaAsSb based DHBTs with InAlAs emitters are investigated using a 4 × 100mm multi-wafer production Riber 49 MBE reactor fully equipped with real-time in-situ sensors including an absorption band edge spectroscope and an optical-based flux monitor. The state-of-the-art hole mobilities are obtained from 100nm thick carbon-doped GaAsSb. A Sb composition variation of less than ± 0.1 atomic percent across a 4 × 100mm platen configuration has been achieved. The large area InAlAs/GaAsSb/InP DHBT device demonstrates excellent DC characteristics,such as BVCEO＞6V and a DC current gain of 45 at 1kA/cm2 for an emitter size of 50μm × 50μm. The devices have a 40nm thick GaAsSb base with p-doping of 4. 5 × 1019cm-3 . Devices with an emitter size of 4μm × 30μm have a current gain variation less than 2% across the fully processed 100mm wafer. ft and fmax are over 50GHz,with a power efficiency of 50% ,which are comparable to standard power GaAs HBT results. These results demonstrate the potential application of GaAsSb/InP DHBT for power amplifiers and the feasibility of multi-wafer MBE for mass production of GaAsSb-based HBTs.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.