目标探测.识别和跟踪的传感器数据融合

多传感器组合系统数据融合技术是当代探测，识别领域的一项新技术，本文在介绍多传感器组合与数据融合技术优点的基础上，介绍了成像激光雷达与前视红外传感器数据融合技术，重点介绍了红外行扫描器和红外成像摄像机的数据融合技术。     

低慢小目标监视技术现状及发展

本文首先阐述了低慢小目标特性,包括其外形特性、速度特性、红外特性,分析现有低慢小监视技术能力,问题具体表现为目标雷达截面积小导致回波弱、目标速度低导致杂波和干扰混叠严重、热量辐射小导致红外特性不明显等;然后,分析了未来技术发展方向,指出多元传感器协同探测、数据融合、综合识别的可行性,并仿真证明了提升雷达探测识别能力的方法。结果证明,采用“宽带多普勒处理”方式可有效提升改善因子,而基于窄带时、频域相结合的目标分类识别方法有望解决目标分类识别问题。     

红外偏振在目标探测识别中的研究进展

简要论述了红外偏振成像技术的特点及其优势,并分类讨论了红外偏振成像系统的结构;随后,重点介绍了红外偏振技术在国内外被应用于目标探测与识别方面的研究进展;最后,基于红外偏振技术的特性,提出了采用圆偏振光进行目标探测识别的概念。     

大气层外弹道目标红外辐射特性研究

针对来袭弹道导弹大气层外飞行过程中的目标识别问题,提出了对弹道目标的红外辐射探测仿真方法。红外辐射特性是大气层外弹道式目标的基本特性之一,也是开展目标识别的重要依据。对于弹道式目标的红外辐射特性识别的需求,本文开展了天基红外传感器对大气层外弹道式目标探测红外辐射特性的建模与仿真研究工作。首先建立了天基红外传感器对大气层外弹道式目标探测的红外辐射计算模型,接着基于STK/EOIR开展了典型目标的红外辐射特性仿真,最后分析了弹头目标和诱饵的红外辐射特性。     

基于多波段特征融合模板匹配的目标识别方法

为了满足天基系统对红外探测目标的高精度识别需求,提出了一种基于多波段特征融合模板匹配的目标识别方法。首先阐述分析了目标多维特征要素以及分类手段。结合目标运动特征、多波段下目标光谱特征以及红外辐射变化等特征实现了特征融合处理,并基于区域特征变化,采用动态规整模板匹配算法完成了目标识别。最后结合合作目标的红外辐射强度序列数据对参数进行了训练调整。分析结果表明,本文建立的识别方法能够较好地实现目标型号识别,性能优于传统的动态规整匹配算法。     

红外目标隐身效果评价仿真软件设计

根据红外目标设计过程中对红外隐身效果评价的需求,设计开发了基于探测概率的红外目标隐身效果评价仿真软件。使用较为成熟的FLIR92模型,对红外目标设计过程中生成的三维目标热模型数据进行了等效温差处理,再利用二代焦平面热成像系统静态性能模型,仿真了不同系统参数下热成像系统的静态性能,结合探测概率模型估算出不同方向上目标被该红外成像系统发现、定向、识别、认清的距离,从目标探测的角度实现了对不同红外目标设计参数下红外隐身效果的评价。     

结合雷达目标特征的红外成像目标识别

由于单传感器在导弹的目标识别和跟踪方面存在的固有缺陷,近年来,数据融合技术在这一方面得到广泛地应用和研究。文中提出了在双模（ 雷达,红外） 数据融合方案中,结合雷达目标特征的红外成像目标识别方法,并详细讨论了所涉及的图像处理技术（ 区域分割,骨架提取） 和人工神经网络分类技术。最后给出了实验结果和结论。     

激光/红外复合扫描引信目标识别算法

针对激光、红外单模引信抗环境干扰能力差、目标识别概率不高的问题,提出了一种基于关联的多元线阵激光/红外复合扫描的模糊识别算法。该算法通过建立激光/红外线阵扫描模型,对目标的顶部三维轮廓与顶部红外辐射图像进行特征提取与关联信息融合,对比真实目标特征参数,设计了基于模糊理论的目标识别算法,得出三组识别特征各自的识别概率,在此基础上对三种识别概率继续进行模糊推理融合得出目标的最终识别概率。仿真结果表明,该复合探测目标识别概率比单模识别方法有较大幅度的提高。     

《电讯技术》专题资料 《现代战争目标识别技术的现状及发展》题要(二)

超视距雷达的舰船目标识别技术探讨传统的敌我识别系统都只能在视距内工作 ,而高频地波和天波雷达、微波超视距雷达均可探测到视距外的海上目标 ,但目标的属性识别问题一直是它们的难点 ;本文针对超视距雷达的技术特点 ,对有关的舰船目标识别方法进行了探讨。非协同目标识别的相关技术目标识别是雷达发展过程中的一个重大研究课题 ,而非协同目标识别更是当今最为活跃的研究领域。本文对非协同目标识别的概念及其相关技术进行了介绍和简要分析。基于多传感器数据融合的非协同目标识别文中介绍了多传感器数据融合的概念 ,数据融合应用于非协同…     

基于玫瑰扫描目标探测与识别的研究

针对＂毒刺＂导引头双色探测系统,介绍了玫瑰扫描原理,分析目标探测与识别方法,建立了目标探测与识别模型。讨论非重叠图像扫描信息转化为二维图像的过程,提出了重叠图像映射方法及目标识别方法的应用策略。最后基于VC建立仿真平台,并结合红外弹的数学模型分别验证在红外弹投放瞬间,目标与红外弹分离时玫瑰扫描结果及目标识别应用策略。     

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.     

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.     

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.