基于PowerPC的某型数据加载器的设计

为了坦克等武器作战任务信息传输和传递的准确性和安全性，并考虑数据加载的方便快捷，文章提出了一种采用PowerPC处理器实现安全可靠加载任务数据的解决方案。设计方案采用PCMCIA标准线性FLASH存储卡作为任务数据加密存储和传递载体，在坦克驾驶室操纵台安装一个集成PCMCIA存储卡内数据读取解密和CAN总线数据加载等功能为一体的作战任务加载器。文章从应用需求出发，对加载器的软硬件设计与实现方法进行了较为详尽的描述。此作战任务加载器的应用丰富了任务数据的加载方式，减少了驾驶员的操作，并能保证作战任务数据的可靠传输。     

航空导航计算机快速数据加载器设计与实现

为了提高航空导航计算机导航数据加载速度，设计开发了导航计算机的快速数据加载设备，即以PCI04工控机为主控器，以智能IC卡为导航数据存储器，编制了数据加载存储驱动程序，采用合理的硬件接口电路，实现了在飞机起飞前对导航数据完全程序化的快速加载，极大地提高了数据加载速度和飞机的快速出勤能力。     

USB技术在指纹识别门禁系统中的应用

USB总线是一种方便可靠而且快速的数据传输方法。文章介绍了采用USB技术来传递指纹数据和控制门禁开关的指纹识别门禁系统的实现方法,对此系统中的中间传输单元的设计进行了说明。     

基于FPGA的刷卡拍照考勤系统硬件设计

采用Altera公司的FPGA作为核心微处理器,结合带3Mbit存储器的OV7670图像传感器模块、SD存储卡、USB通信芯片以及带触摸的TFT液晶显示屏等设备,实现刷卡拍照考勤系统的硬件设计。系统具有USB图像数据采集传输功能,考勤记录集查询功能,同时考勤图像数据通过液晶显示屏显示出来。     

基于AFDX的跨总线ARINC615协议软件设计及实现

ARINC615协议定义了一种基于ARINC429总线的数据加卸载方法,在以AFDX网络为核心的航电网络中,数据加载器一般为基于AFDX通信的端系统设备,为了完成航电网络加载器对ARINC429总线设备的加载,文章提出了一种基于AFDX的跨总线加载结构,采用有穷状态机的方法实现了ARINC615协议的功能,设计并实现了基于ARINC615协议的应用软件,保证了文件传输的有效性和可靠性。     

利用FT8U232AM实现的USB/RS-232转换器

通用串行总线以其传输速度快、占用资源少，真正的即插即用等优点正在逐步取代传统的RS-232总线，以传统的RS-232接口为数据通信通道的外部设备可以通过USB/RS-232转换器连接在主机上，文章详细叙述了FTDI公司的USB/RS-232双向转换芯片FT8U232AM的工作原理，内部结构、引脚分布及功能，给出了一个利用FT8U232AM实现的USB/RS-232转换器的典型设计电路和驱动软件以及片外EEPROM的编程清单。     

基于耐高温存储卡的PCR仪校准系统研制

采用耐高温存储卡技术设计开发了一套适合PCR仪在线监测的校准系统。该系统以存储卡为媒介对采集的数据收集和传递,消除校准过程外接数据引线而引起PCR仪运行故障或测量结果偏离的影响。实验结果表明,该系统温度传感器误差在0.03℃以内,16路温度传感器均匀性良好,存储卡收集的数据真实可靠,可作为校准PCR仪温度参数的标准器使用。     

基于USB的家庭健康监护系统数据采集的设计

文章介绍了基于USB口的家庭健康监护系统中数据采集系统的设计 ,给出了系统的结构及其主要部分的工作原理。利用PC所具备的USB数据传输功能 ,可与带USB口的各种台式计算机、笔记本电脑连接构成家庭保健监护系统 ,且具有USB设备连接方便 ,无需外接电源 ,即插即用 ,支持热插拔 (PNP)动态加载驱动程序 ,使用方便。     

模拟器中基于Slave FIFO模式USB数传系统设计

在模拟器的设计中,为了使数据能够快速有效地在模拟器的各个模块之间进行高速传递,提出了一种同步Slave FIFO模式高速USB数据传输设计方法,并完成了系统的软硬件设计。系统以FPGA作为核心逻辑控制单元,优化设计有限状态机实现同步Slave FIFO接口协议,设计了芯片固件程序,实现系统在线自动升级加载功能。实际测试表明,本系统数据传输能力平均可达40 MB/s,本系统设计可扩展性好,易于修改和移植,能降低模拟器成本。     

人工智能在无人作战飞机上的应用与展望

在未来高对抗环境下，夺取空中优势至关重要，无人作战飞机（UCAV）的参战将实现飞行员零伤亡。人工智能（AI）作为无人作战飞机未来发展的颠覆性技术之首，将从力量倍增器或作战支持转变为真正的人类替代者。从AI对UCAV的作用与意义出发，介绍了国外UCAV相关的人工智能项目的研究进展，总结了UCAV相关的AI智能算法，分析了UCAV的发展趋势。随着人工智能技术、机载处理技术以及传感器技术的进步，UCAV将在未来战争中实现智能协同、智能任务与智能飞行，成为空战的主力。     

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.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

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.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

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.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.