后射火控系统原理及关键技术分析

越肩发射是歼击机对付尾后敌机的一种新的、有效的方法.越肩发射就是本机利用机载火控系统控制机载空空导弹攻击尾追本机的敌机的一种新型的攻击方式,它分两种发射方式:前射和后射,即本机向前发射导弹,"越肩"攻击尾后目标和本机向后发射导弹攻击尾后目标.本文重点讨论了后射火控原理和关键技术:机载后视传感器、发射架和后射导弹等的问题;最后定性地研究了解决这些问题的方法.     

地面对卫星瞄准精度受大气湍流的影响分析

分析了地面对卫星激光瞄准精度受大气湍流效应的影响。首先,提出了大气湍流作用下地面对卫星激光瞄准精度的概念。其次,采用多层相位屏的数值方法求解激光大气传输满足的抛物型方程,仿真研究了不同发射参数下地面对卫星的激光瞄准精度,结果表明:地面对卫星的激光瞄准精度与激光束的发射口径成正比,发射口径越大,瞄准精度越高;而与激光束的发散角成反比,光束发散角越大,瞄准精度越低。最后,比较研究了不同瞄准精度下到达卫星入瞳处的功率以及功率密度。研究成果可为开展地面对抗卫星的试验提供理论依据和数据参考。     

越肩发射和其它攻击方式

作为当今最新的火控攻击方式，越肩发包括前射和后射两种方式，本文首先详细地介绍了越肩发射方式；然后比较了它们和其它攻击方式的关系。     

第三方追踪的安全研究

第三方追踪可以获得用户的浏览历史等隐私信息,如何保护第三方追踪带来的隐私威胁问题成为安全领域的重要研究内容.首先介绍第三方追踪的基本概念、特点及安全现状,并结合第三方应用的类型,总结了第三方追踪存在的隐私威胁.然后从有状态追踪和无状态追踪2个方面介绍第三方追踪的技术,并对第三方追踪防御的相关研究进行了分析和比较.最后总结第三方追踪中研究领域的开放性问题和发展方向.     

双射弹的擦肩发射原理探索

美国双射程导弹代表着下一代空空导弹的发展方向，它的一个重要性能就是擦肩发射，即在本机和目标擦肩而过时发射导弹。本文主要研究了在未来空战中将发挥十分重要作用的擦肩发射的原理，认为擦肩发射是越肩发射的一种新形式，它可以通过缩短导弹的最小发射距离来增大本机的攻击机会，在近距格斗中由于擦肩发射放宽对本机指向的要求，从而降低了对本机敏捷性的要求。     

YAG激光测距仪接收系统小孔位置调整方法

YAG激光测距仪一般包含有瞄准、发射、接收三个光学系统。目前所生产的YAG激光测距仪有两种:一种是瞄准、发射、接收光学系统彼此独立的分离式测距仪;另一种是发射系统独立,瞄准、接收共用一个物镜和三个系统共用一个物镜的复合式测距仪。所有YAG激光测距仪的光学系统在生产装配过程中,都必须进行调校。调校内容有:三轴平行性,激光束散角,接收小孔光栏位置等等。     

YAG激光测距仪三轴检校方法探讨

YAG激光测距仪三轴(瞄准、发射、接收三系统光轴)检校方法,目前用得最多的是平行光管检校法.其中瞄准系统和接收系统的光轴平行性,用一台带高斯目镜的大口径平行光管,就可准确进行校正,方法简单易行,不在此多述.     

后向攻击技术方案的对比与选择

以空战前向攻击为参照，以对比的方式分析，论证了导弹越肩发射后向攻击和后向发射后向攻击技术方案的特点和存在的问题，在此讨论的基础上，提出了选择空战导弹后向攻击技术方案的倾向性意见。     

基于第三方信号无源探测系统研究

针对隐形飞机不断更新换代,雷达截面积越来越小,而且隐形飞机执行任务时需保持无线电静默,使得通过接收、处理隐形飞机发射信号,对其进行探测、定位和跟踪原理的无源探测系统失效。文中主要讨论了基于第三方信号检测隐形目标的无源探测系统,并对侦察第三方信号作用距离和基于第三方信号无源探测系统的作用距离进行仿真,证明基于第三方信号无源探测系统在检测隐形飞机方面是可行的。     

发展中的五所质量检测业务

信息产业部电子第五研究所安全与电磁兼容检测中心,即中国赛宝(总部)实验室,专业从事电子、电器产品的认证检测、鉴定评价,以及检测技术研究、仪器设备开发制造等,是独立于产品制造方和产品使用方的第三方认证检测机构.该中心20世纪80年代初建成,20多年来,完成了难以胜数的检测业务量,同时也取得了多项科研成果.到今天,拥有员工150多人,仪器设备800多台套,已成为国内规模最大的以电子产品检测业务为主的综合性产品检测机构.目前,该中心正瞄准国内外电子、电器产品检测市场,积极开拓,全面发展,力争在近几年内跻身于国际一流的知名大型认证检测机构之列.     

移动应用程序的认证管理

针对移动互联网中第三方移动应用程序的安全管理问题,给出了对第三方应用程序认证管理的思路和建议,并重点介绍了移动代码签名关键技术。     

Service-oriented Access to Next Generation Networks—from Service Creation to Execution

Existing telecommunication networks and classical roles of operators are subject to fundamental change. Many network operators are currently seeking for new sources to generate revenue by exposing network capabilities to 3rd party service providers. At the same time we can observe that services on the World Wide Web (WWW) are becoming mature in terms of the definition of APIs that are offered towards other services. The combinations of those services are commonly referred to as Web 2.0 mash-ups. Rapid service design and creation becomes therefore important to meet the requirements in a changing technology and competitive market environment. This report describes our approach to include Next Generation Networks (NGN)-based telecommunications application enabler into complex services by defining a service broker that mediates between 3rd party applications and NGN service enablers. It provides policy-driven orchestration mechanisms for service enablers, a service authorization functionality, and a service discovery interface for Service Creation Environments. The work has been implemented as part of the Open SOA Telco Playground testbed at Fraunhofer FOKUS.     

一种基于LabVIEW和第三方驱动程序的无线电环境自动测试平台

一种基于LabVIEW和第三方驱动程序的自动化无线电环境测试平台,分别由天线控制转台、总控电脑、频谱仪三部分组成,其中总控电脑分别与天线转动平台、频谱仪相连;而集成于总控电脑中的控制程序包括实时天线转动平台控制和频谱仪控制两个子模块,其中实时天线转动平台控制模块通过串口向天线转台下发当前的方位、俯仰值,频谱仪控制模块通过网线将总控电脑与频谱仪相连具有设置控制频谱仪的观测参数,读取观测数据的功能.     

Novel growth of ZnO micro-rod arrays using hydrophobically micropatterned surfaces

Large-area ZnO micro-rod arrays were successfully achieved on a patterned glass substrate in an aqueous solution at mild growth conditions. Self-assembled monolayers (SAMs) of octadecyltrichlorosilane (OTS, C₁₈H₃₇SiCl₃) were prepared on a glass substrate through micro-contact printing (μCP) technique. Site-selective ZnO growth was achieved by the patterned SAM-covered substrate. X-ray diffraction (XRD) and scanning electronic microscopy (SEM) were used to analyze as-fabricated ZnO arrays. ZnO micro-rods have a uniform diameter of about 300 nm with an aspect ratio of 15. It is noteworthy that the alkyl end-groups of OTS strongly directed the nucleation and growth of ZnO, and ZnO arrays were crystallized on organic group-covered regions. By modifying the μCP process, patterns that differ from the original PDMS stamp could be obtained.     

1024QAM调制解调系统的FPGA实现

在MQAM调制解调原理的基础上重点介绍了如何利用DSP Builder实现1024QAM调制解调系统模型以及对模型进行算法级仿真和生成VHDL代码,以及与第三方软件结合生成的VHDL代码如何下载到FPGA器件中进行验证.     

Scenario based techno-business analysis of service platforms and their service portfolios

This work focuses on techno-business analysis of service platforms and service portfolios. Service platform (SP) hosts services and enabling service functionality. Service providers deliver two main products: end-user services to their customers and enablers to other business actors. 3rd party service providers combine enablers with their own functionality, wrap them in end-user services and deliver them to their customers.     

Interfaces analysis by impedance spectroscopy and transient current spectroscopy on semiconducting polymers based metal–insulator–semiconductor capacitors

Impedance and transient current measurements on metal–insulator–semiconductor (MIS) capacitors are used as tools to thoroughly investigate the bulk and interface electronic transport properties of semiconducting polymers, i.e. poly(3-hexylthiophene) (P3HT). Distinct features were observed at both interfaces, i.e. metal–semiconductor and semiconductor–insulator. The results revealed a dispersive transport in the bulk due to the band tail of the localized states, presence of interface states at the interface between the insulator and the semiconductor and formation of a less conductive small layer at the interface semiconductor–metal contact due to intrusions of sputtered Au particles. Effects of self-assembled monolayers (SAMs) treatments of the gate insulating dielectric were investigated showing that treating the gate dielectric with either ozone or hexamethyldisilazane (HMDS) or octyltrichlorosilane (OTS) alter not only the interface semiconductor–insulator but the bulk properties as well. An exponential density of states with a width parameter of 38–58 meV depending on the surface treatment was found to be representative of the band tail of P3HT. Though both OTS and HMDS treatments slightly increase the density of interface states, only OTS treated samples showed a decrease in disorder parameter of the bulk. The latter fact can be attributed to an increase of the grain size due to a favored π-π stacking film growth. An outcome explaining the already reported increase of the lateral mobility and decrease of the vertical mobility observed upon OTS treatment of the gate insulating dielectric in poly(3-hexylthiophene) based devices.     

金属材料对M-PC-M结构中光学Tamm态的影响

为了研究金属材料对金属-光子晶体-金属结构中的Tamm态的影响,采用Drude-Lorentz色散模型研究了金和银复折射率的特性,得出了复折射率的实部和虚部随波长的变化规律。并对Au-PC-Au和Ag-PC-Ag中的光学Tamm态随金属厚度、入射角、周期数的变化规律进行了对比研究。得出:在Au-PC-Au和Ag-PC-Ag中都会出现两个光学Tamm态,即OTS1和OTS2。Au-PC-Au和Ag-PC-Ag中光学Tamm态的中心波长和透射峰值随金属厚度、入射角、周期数的变化规律是一致的。但Ag-PC-Ag中光学Tamm态的透射峰值明显大于Au-PC-Au中光学Tamm态的透射峰值,Ag-PC-Ag中OTS1和OTS2的分离程度明显大于Au-PC-Au中OTS1和OTS2的分离程度。     

复合自组装分子膜的摩擦特性研究

本文采用自组装技术制备了三氯十八硅烷(octadecyltrichorosilane 0TS)／3-胺基丙基-三甲氧基硅炕(3-amino-propyltrimethoxysilane APTMS)和APTMS／OTS复合自组装分子膜,在原子力／摩擦力显微镜上对薄膜的摩擦特性进行了测试,并与0TS和APTMS自组装分子膜(self-assembledmonolayers SAMs)进行了对比。结果表明,OTS／APTMS复合自组装分子膜因既保持了一定的键合强度叉增加了自组装分子的流动性,使其摩擦力显著降低。复合自组装分子膜的摩擦力随着载荷和滑动速度的增大而增大,这与自组装分子的受力响应和弛豫特性相关。合理地设计自组装分子膜可有效地减小摩擦。     

具有无机有机双绝缘层和修饰电极的薄膜晶体管

研究了有机薄膜晶体管器件.器件是以热生长的SiO2作为有机薄膜晶体管的栅绝缘层,酞菁铜作为有源层的.实验表明采用一种硅烷耦合剂-十八烷基三氯硅烷(OTS)修饰SiO2可以有效地降低栅绝缘层的表面能从而明显提高了器件的性能.器件的场效应迁移率提高了2.5倍、阈值电压降低了3 V、开关电流比从103增加到104.同时我们采用MoO3修饰铝作为器件的源漏电极,形成MoO3/Al双层电极结构.实验表明在同样的栅极电压下,具有MoO3/Al 电极的器件和金电极的器件有着相似的源漏输出电流Ids.结果显示具有OTS/SiO2双绝缘层的及MoO3/Al 电极结构的器件能有效改进有机薄膜晶体管的性能.