面源红外诱饵技术特性及材料组分研究

介绍了国外2种典型面源红外诱饵的技术特征,对红外成像制导导弹制导过程进行了分析,研究了面源型红外诱饵干扰红外成像制导导弹的干扰模式,分析了面源型红外诱饵的光谱辐射特性、辐射对比度、辐射时间特性和辐射面积特性,探讨了2类主要面源型红外诱饵材料的化学组分及燃烧辐射特性等.     

面源红外诱饵对抗成像制导导弹的仿真研究

面源红外诱饵是一种有效对抗红外成像制导导弹的干扰装备.它能模拟被保护目标的红外特征,达到干扰红外成像制导导弹的目的.首先,分析面源红外诱饵对抗红外成像制导导弹的干扰机理.其次,建立面源红外诱饵的辐射模型和运动模型.然后,分析面源红外诱饵红外图像的位置、面积和灰度的变化规律,仿真生成面源红外诱饵红外图像.最后,以干扰成功率作为面源红外诱饵干扰效果评估准则,计算不同距离和不同投放数量下面源红外诱饵干扰成功概率,并对仿真结果进行分析.仿真结果表明:面源红外诱饵能够逼真地模拟目标飞机的光谱辐射分布特性,有效干扰红外成像制导导弹,显著提高目标飞机的战场生存力.     

点面复合红外诱饵空中动态散布特性仿真及使用研究

点面复合红外诱饵是国内外飞机平台使用的先进红外干扰装备之一,具备较好的对抗红外制导导弹的能力。为获得点面复合红外诱饵空中动态散布特性,为其使用提供理论基础,提升点面复合红外诱饵使用效能,对点面复合红外诱饵的点源诱饵和面源诱饵进行动力学和运动学分析,联立方程组并进行求解,获得了点源诱饵空中运动轨迹和面源诱饵在空中的散布情况,然后改变飞机平台速度进行仿真,获得了点源诱饵和面源诱饵的相对运动趋势和平台速度影响规律。基于点面复合红外诱饵空中动态散布特性仿真,开展使用研究,阐述了点面复合红外诱饵的干扰特性和干扰机理,干扰特性主要包括辐射强度值、辐射强度变化率和辐射面积,分析了点面复合红外诱饵在红外制导导弹导引头视场的形成特点,并基于此开展干扰机理研究,分析了点面复合红外诱饵在红外制导导弹的成像阶段和非成像阶段的干扰机理,能够为诱饵使用策略的制定提供参考和借鉴,提升飞机平台战场生存能力。     

面源红外诱饵的建模与仿真研究

红外成像导弹已经得到了广泛的发展,与之对抗的面源诱饵随之诞生。根据面源红外诱饵的干扰原理,结合红外成像制导导弹的工作原理、抗干扰方法,以美国MJU-50/B面源红外诱饵为基础,建立了飞机、红外成像制导导弹、机载面源红外诱饵的运动和红外辐射模型,实现了面源红外诱饵空中对抗的仿真,总结分析了机载面源红外诱饵的特性。     

空战对抗中面源红外诱饵干扰效能仿真

面源红外诱饵相比于传统的红外诱饵,在燃烧速率、扩散范围、干扰效能等方面具有显著的优越性。考虑实验成本的经济性和测试干扰效能的效率,提出了一种空战对抗中面源红外诱饵干扰效能的仿真思路。首先,建立了导弹运动和导引头跟踪模型、飞机红外辐射模型,作为空战对抗双方的假想;其次,建立了诱饵箔片的运动与燃烧模型,以诱饵箔片为研究对象,求解箔片表面温度分布,并通过燃烧算法优化,得到整体辐射特性;最后,通过改变面源诱饵的发射角度、高度、目标机速度等参数,进行干扰成功率的仿真。仿真结果表明,提出的效能评估思路可行有效,与真实测试很接近,达到面源诱饵干扰效能评估的要求。     

面源红外诱饵仿真建模方法研究

分析了典型面源红外诱饵的组成,总结了面源红外诱饵与点源红外诱饵在结构组成和光谱特性方面的差异。通过理论推导,研究了面源红外诱饵的运动特性和三维模型建模方法,基于VC软件实现了面源红外诱饵的运动学仿真,利用OpenGL技术实现了面源红外诱饵三维模型和动态红外图像生成,仿真结果验证了面源红外诱饵的干扰特性。     

面源红外诱饵辐射特性及其图像仿真

本文根据箔片表面的化学反应,从燃烧学原理出发,建立了箔片的燃烧模型,并对箔片的燃烧和辐射特性进行了分析,在此基础上利用VC++与OpenGL编程建立了面源红外诱饵图像的仿真系统,得到面源红外诱饵的红外仿真图像,并对面源红外诱饵的红外辐射特性进行了分析。     

诱饵参数对面源红外诱饵干扰效能的影响

面源红外诱饵作为一种主动干扰型的红外对抗装备,与传统的红外诱饵弹相比,在运动特性和干扰效能等方面有显著的优越性。综合考虑到试验的成本和干扰效能评估的效率,文中提出了一种基于空战对抗仿真算例的效能评估思路:首先,建立了导弹运动模型、介绍了跟踪优化算法和抗干扰识别算法;其次,重点分析了飞机蒙皮红外辐射特性的求解过程;然后,分析了诱饵箔片的运动扩散模型以及燃烧优化算法;最后,改变面源诱饵的参数,如发射角度、发射高度以及发射速度,进行干扰成功率的仿真计算。将仿真结果与实测数据进行比对,验证了效能评估思路的可行性,基本满足干扰效能评估的要求。     

分布式面源型红外诱饵建模研究

随着红外成像制导抗干扰性能的增强,促进了红外诱饵技术的发展,面源型红外诱饵是一种有效对抗红外成像制导的手段,通过对面源型红外诱饵燃烧单元空中分布和辐射特性2方面的研究,构建了面源型红外诱饵仿真模型.     

机载面源红外诱饵及干扰效能研究

红外制导导弹,特别是红外成像制导导弹的发展,给飞机造成了巨大的威胁。而面源红外诱饵是对抗红外成像制导武器的有效手段。首先,在分析红外成像制导的原理和弱点的基础上,探讨了机载面源红外诱饵的干扰机理和作战能力指标,并介绍了机载面源诱饵的装备现状。其次,概述了自燃箔片红外诱饵和的自燃液体红外诱饵的装备现状和制备方法。然后,从试验研究、建模研究、图像生成、干扰策略研究等几个方面综述了机载面源红外诱饵干扰效能的研究现状。最后提出了一种基于探索性分析方法的机载面源红外诱饵干扰效能的仿真方案,能够综合多种因素分析诱饵的干扰策略。     

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.