炮兵阵地中对抗激光制导武器的实现方案

在现代作战中,对炮兵而言,炮兵阵地防激光制导武器的打击显得十分重要。在研究高重频激光干扰机理及干扰方式的基础上,提出了一种可以在炮兵阵地上对抗激光制导武器的方案。     

光纤在现代海军中的应用

着重叙述光纤目前在海军最有发展前途的几个领域(光纤通信、光纤制导鱼雷、导弹、光纤陀螺和光学水听器等)的应用。     

远程反坦克导弹方案弹道研究

本文对定高飞行的远程反坦克导弹的方案弹道进行了探讨,给出了各典型弹道的数学模型,最后对末制导段的最佳制导规律进行了分析,可供远程反坦克导弹初步设计时参考。     

基于电视跟踪器的撞网回收全自动制导系统仿真研究

本文概述了无人机全自动撞网回收制导系统的特点和组成；选择了控制导引方案,给出了仿真结果,分析了系统误差分布并对影响系统的主要误差建模仿真,最后给出了系统误差分配,为全自动制导方案的工程实现提供了理论根据.     

国外近几年光纤制导导弹发展现状

阐述近几年来美国光纤制导导弹的发展现状及制导所用的光纤、寻的器等有关技术问题。概述法国和德国等国家在光纤制导方面的发展现状。     

从海湾战争看军用光纤技术的发展

从现代战争特点出发论述了光纤技术在未来战争中的地位、应用和发展,最后简要介绍我国光纤技术发展情况。     

半导体激光器在激光遥控制导中的空间耦合

针对高功率脉冲半导体激光器的远场特点,及激光制导对激光功率密度和光斑均匀性的要求,给出多孔径空间耦合方案并对其优点进行理论分析;针对纳米叠层芯片高功率半导体激光器偏振特性,基于偏振复用的原理,进行2支高功率半导体阵列激光器的偏振合束研究。通过试验得出结论:偏振耦合后系统输出光功率几乎2倍于单个激光器输出功率,采用多孔径耦合及偏振耦合均能满足遥控制导光斑要求。     

新型反坦克武器精确制导体制分析

本文概述精确制导反坦克武器的发展现状及其制导特点，分析未来新型制导兵器应重点发展的几种先进的制导方式，提出精确制导应走多功能化、多制导类型兼容发展道路的建议。     

光学透明频率选择表面的设计研究

以氟化镁为基底材料, 采用基底、金属网栅与频率选择表面一体化设计方法设计了一种雷达波与光学波段双带通的结构. 利用模式匹配法对设计结构的传输特性进行了仿真研究, 并将设计结果与制备样件的测试结果进行了对比分析. 结果发现: 采用一体化设计的方法设计光学透明频率选择表面, 不仅能够快速得到电场基函数而且还能够准确预估其谐振尺寸, 从而在提高计算效率的同时避免了模式互作用零点的出现. 采用一体化设计方法获得了具有稳定滤波特性的光学透明频率选择表面, 为雷达/红外双模制导头罩的电磁屏蔽技术和隐身技术提供了一种有效技术方案. 关键词： 复合制导 频率选择表面 金属网栅 一体化设计     

物理学与精确制导技术

从物理学的观点出发，介绍现代高技术战争中精确制导技术的基本原理，分析目前常用的几种精确制导技术（如微波雷达制导、红外制导、激光制导、惯性制导、电视制导等）在应用过程中显露出来的优缺点，从而论证物理学是精确制导技术的重要理论基础。     

Maps and inverse maps in open quantum dynamics

Two kinds of maps that describe evolution of states of a subsystem coming from dynamics described by a unitary operator for a larger system, maps defined for fixed mean values and maps defined for fixed correlations, are found to be quite different for the same unitary dynamics in the same situation in the larger system. An affine form is used for both kinds of maps to find necessary and sufficient conditions for inverse maps. All the different maps with the same homogeneous part in their affine forms have inverses if and only if the homogeneous part does. Some of these maps are completely positive; others are not, but the homogeneous part is always completely positive. The conditions for an inverse are the same for maps that are not completely positive as for maps that are. For maps defined for fixed mean values, the homogeneous part depends only on the unitary operator for the dynamics of the larger system, not on any state or mean values or correlations. Necessary and sufficient conditions for an inverse are stated several different ways: in terms of the maps of matrices, basis matrices, density matrices, or mean values. The inverse maps are generally not tied to the dynamics the way the maps forward are. A trace-preserving completely positive map that is unital cannot have an inverse that is obtained from any dynamics described by any unitary operator for any states of a larger system.     

Ablation of Transparent Materials Using Excimer Lasers for Photonic Applications

For many years, the development of effective ablation or laser machining techniques for making micro-optical components has been the key factor in the birth of new photonic devices and systems. In this article, the ablation characteristics of two types of the most important transparent materials, transparent polymers and glasses, are studied. Simple shaped microcavities are first machined for studying the fundamental ablation parameters, including threshold fluence, effective absorption coefficient, and ablation rate. In studying polymer ablation, five standard grades and five proprietary polymeric compounds are selected. Ablation techniques using these transparent polymers for making arrayed ferrules and curved microlenses are presented. Applications of these ablated microstructures for optical fiber connectors, optical fiber coupling and alignment, and transparent chip encapsulants, are introduced and demonstrated with emphasis on the quality of the ablated profiles and dimensions to satisfy the required performance. In glass ablation, borosilicate glasses are considered and their associated ablation behaviors are studied. The procedures to ablate glass-based arrayed microstructures with flat and curved surfaces are described. The utilizations of these arrayed microstructures for optical waveguide, wave absorber, and beam guider, are specifically discussed. Finally, concluding remakes for future trends are presented.     

电感耦合等离子体发射光谱法测定铝合金中La、Ce、Pr、Nd、Sm

利用ICP—AES仪测定稀土铝合金中微量的La、Ce、Pr、Nd、Sm。试样用酸分解,直接上机测定,对光谱干扰情况和仪器参数的选择进行了研究。实验结果和推荐值核对相符。     

杆的离散系统的某些混合型振动反问题

研究杆的离散系统的混合型振动反问题,即由给定的部分频谱数据和部分模态数据构造一个杆的离散系统的刚度矩阵和质量矩阵.提出3个此类反问题,给出反问题的解法,讨论反问题的解的存在条件,给出相应的计算实例,并分析这类反问题的潜在价值.     

半导体量子点激光器研究进展

首先简要地回顾了半导体激光器发展的历史和量子点激光器所特有的优异性能,进而介绍半导体量子点及其三维量子点阵列的制备技术,然后分别讨论了量子点激光器（能带）结构设计思想,实现基态激射时所必须具备的条件和近年来国内外半导体量子点器的研究进展。最后分析讨论了量子点激光器研制中存在的问题和发展趋势。     

现代信息安全与混沌保密通信应用研究的进展

本文首先概述现代保密通信及网络信息安全的主要概念和发展状况，对迄今发展的几种现代著名密码算法进行分析比较；然后综述国际上已经提出的一些典型的混沌保密通信方案及其应用研究的新发展。从通信角度，为了向实用化方向发展，我们将混沌通信研究中常用的混沌遮掩、混沌开关、混沌调制三种主要技术方案，按照实际应用需要，重新把它们分类为三种主要形式，即模-模通信、模-数-模通信和数-数通信，这样便于实际应用，易于借鉴已有知识分析各类通信的性能优劣。在评述性分析了当前国际上三种混沌保密通信方式的典型方案及其进展后，最后简要总结混沌保密通信的一些关键技术，指出今后值得研究的方向，并展望了混沌通信的应用前景。     

功率GaAs MESFET小信号模型参数的提取（英）

采用非本征元件的参数作为本征元件参数函数的自变量的方法，求解MESFET小信号等效电路模型，并彩相对误差来构建目标函数。以FET在零偏置状态的非本征元件值作为初值，通过优化求得了热FET状态的本征元件值，S参数的计算值与实验值吻合得很好，S11的相对误差为0.09%,S12为1.1%,S21为0.08%，S22为 2.26%。该方法收敛快，精度高并且效率高，便于移植到微波器件CAD设计和模拟软件中。     

Relativistic Distorted-Wave Collision Strengths of Ni-, Cu- and Zn-like Au Ions

Excitation energies and electron impact excitation strengths from the ground states of Ni-, Cu- and Zn-like Au ions are calculated. The collision strengths are computed by a 213-levels expansion for the Ni-like Au ion, 405- levels expansion for the Cu-like Au ion and 229-levels expansion for the Zn-like Au ion. Configuration interactions are taken into account for all levels included. The target state wavefunctions are calculated by using the Grasp92 code. The continuum orbits are computed in the distorted-wave approximation, in which the direct and exchange potentials among all the electrons are included. Excellent agreement is found when the results are compared with previous calculations and recent measurements.     

Influence of the Shape of the Orifice on the Local Heat Transfer Distribution of a Flat Plate Impinged by Under-Expanded Sonic Jets

Experiments are carried out for the circular, square, and equilateral triangular orifices of the same contraction ratio in order to explore the heat transfer characteristics for nozzle pressure ratios of 2.36, 3.04, 3.72, 4.4, and 5.08 at z/d = 2, 4, 6, and 8. The presence of vena contracta and shock cells and its locations are estimated from the impact pressure distribution along the axial direction. The pressure drop during the initial expansion is minimal for the equilateral triangular orifice. However, this pressure drop is comparable for the square and circular orifices. The heat transfer characteristics of the circular orifice are nearly axisymmetric, but that for non-circular jets are asymmetric, and the three dimensional effects are clearly observed. This is inferred through the spatial gradients of the Nusselt number and adiabatic wall temperature distributions. The linear correlations for the average Nusselt number are proposed for the circular, square, and equilateral triangular orifices.     

一种视频图像规则圆目标的超分辨率位置测量方法

介绍了一种用于视频图像规则圆目标的超分辨率位置测量方法。分析了超分辨率测量的原理 ,并提出和完成了测量方案 ,取得了满意的结果。首先在目标静止时 ,连续采集多帧视频图像 ,通过叠加平均进行降噪 ;其次通过罗伯特微分算子进行边界探测 ,求出目标的大致位置 ;最后通过边界重心拟合法、边界圆拟合法和最小二乘法拟合求出目标的精确位置。理论分析和实验表明 ,完整圆目标时 ,测量精度可达 1/4像素 ;而当目标图像有缺陷时 ,边界圆拟合法和最小二乘法拟合测量误差增加较少 ,边界重心法的测量误差增加较多。在具体情况下 ,算法及参数应该作相应的调整