毫米波主被动复合探测器目标识别技术

提出了一种在毫米波主被动复合探测器目标识别中利用D-S证据理论进行时空融合的方法。首先将每个传感器不同高度处的信息进行时间上的融合,然后再对两个传感器进行空间上的信息融合。为了适应现代战场的复杂环境和系统实时性的要求,文章采用灰关联分析方法来构造基本概率赋值函数。实验结果表明该方法可行,较以往的单一时间或空间融合,识别率得到了进一步的提高。     

基于二维DFT变换的调频引信信号处理方法

针对无线电调频引信信号处理难以对目标距离-速度信息进行联合估计,提出了基于二维DFT(离散傅里叶变换)变换的调频引信信号处理方法。该方法把无线电调频引信的一维差频信号变换为二维矩阵,然后对二维矩阵数据进行二维DFT变换。通过二维DFT变换后的二维频域信息联合估计差频信号中的距离,速度信息。仿真试验表明,该方法能够利用无线电调频引信差频信号进行运动目标距离-速度联合估计,为无线电调频引信实现高精度分档装定,干扰信号识别提供了一种技术途径。     

基于非负矩阵分解算法的目标成像识别方法

针对激光引信在简易距离轮廓像的识别过程中抗背景结构噪声能力差和处理速度慢的问题,提出了基于非负矩阵分解算法的激光成像引信目标识别方法。该方法利用非负矩阵分解算法从高维数据矩阵里提取出具有判别能力的低维特征矩阵,同时利用激光引信成像过程中图像信息逐行更新的特点,结合逐行分解的方法提高激光成像引信的目标识别速度。仿真验证表明:所提出的方法可以有效地从地面结构噪声中分辨出目标,且处理速度快,可应用于扫描式激光成像引信中。     

无线电引信定向探测技术

讨论了利用引信天线赤道面方向图的不对称性弹丸的旋转探测目标的方向信息，达到定向探探测的目的。通过峰值检测的方法，引信可以识别目标的方向，给出了引信定各探测和识别的总体框图。     

复合引信的信号处理设计及实现

反辐射导弹引信为适应较高的攻击速度多采用近程激光探测体制,但容易受到烟尘、烟雾等干扰.通过对引信与目标交会状态的分析,利用复合探测体制综合处理激光与无线电信息,采用时频分析方式完成目标识别、抗干扰,并给出了引信信号处理工作原理和组成、信息处理流程和软硬件实现.     

战术空地导弹激光引信目标识别方法研究

针对战术空地导弹激光引信复杂的目标背景，提出了一种利用激光测距识别目标的方法．给出了识别判据和识别区域。通过仿真计算．说明了该方法对战术空地导弹激光引信目标识别的理论和实践价值。     

基于薄/厚识别开关的引信自适应延期方法

针对引信采用固定延期起爆方式的攻坚弹的炸点难以适应不同厚薄目标的问题,提出了基于薄厚目标识别开关的攻坚引信自适应延期方法,该方法利用薄厚目标识别开关对薄厚目标的反应不同给出两种不同的信号,延期起爆时间调整电路据此给出两种不同延期时间。仿真表明:基于薄厚目标识别开关的攻坚引信自适应延期方法对厚度200 mm以下,400 mm以上的混凝土目标能够进行自适应起爆控制。     

双电极静电引信起爆控制技术研究

静电引信是一种通过探测目标周围的静电场来获取目标信息并进行起爆控制的新型近感引信,为了解决双电极静电引信的起爆控制问题,通过对目标特性曲线特征的分析,提出了一种用于静电引信起爆控制的方法。采用实验的方法对双电极静电引信起爆控制技术进行了验证。实验结果表明,当控制电路可检测nA级电流时,在几十米左右的探测距离内该方法能够准确识别目标特征,并在最佳炸点位置给出起爆信号。     

基于神经网络与改进D—S证据理论的目标识别

研究基于神经网络（NN）和D—S证据理论相结合对多传感器多测量周期进行数据融合的目标识别方法．采用中心式融合算法,利用神经网络对单个传感器不同周期的目标进行融合识别;利用D—S证据理论对识别信息进行全局融合,得到综合的目标识别,达到对目标识别的目的,并通过实例证明了该方法的有效性．     

一种基于DS证据理论的多雷达目标识别方法

文中研究了利用目标的位置和运动信息通过DS证据理论完成多雷达目标融合识别的方法.单雷达目标识别利用目标位置和运动信息建立目标线性隶属度函数,利用模糊综合评判进行目标分类.融合中心对来自各个雷达的识别概率利用DS证据进行最终的判决.仿真结果表明利用位置和运动信息进行识别的可行性和有效性,验证了多个雷达融合后的识别效果优于单个雷达的效果.     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

Experimental Study on the Small Flyer Initiating Behavior of Fine-grained Explosives

The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.     

Algorithm for Multi-laser-target Tracking Based on Clustering Fusion

Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.     

Robust Graded Sliding Mode Tracking Control for Low Speed Spinning Ballistic Missiles

The nonlinear dynamic model of spinning ballistic missiles is established during the first boosting phase of the missile. Based on the conventional backstepping sliding mode control and the assumption of a two time-scale separation of missile dynamics, a graded sliding mode controller is designed with two sub-sliding surfaces which have invariability to external disturbances and parameter perturbations, and a matrix which comprises three first order low pass filters is introduced to prevent ＂explosion of terms＂. Owing to the upper bounds of the uncertainties are difficult to obtain in advance, adaptive laws are introduced to estimate the values of the uncertainties in real-time. Eventually, the numerical simulation results given to show the proposed controller can ensure the steady flight of missiles.     

A Study on the Estimation of Aeroheating upon the Warhead Nose at Supersonic Speed

An expression for estimating the aeroheating on a warhead nose at different supersonic speeds is proposed by incorporating CFD （computational fluid dynamics） and the least-square method. Compared with the traditional estimation formula, the expression is more accurate, convenient and can be used in the optimized design of warheads. The error from the result obtained in the test of a ball cartridge flight is less than 3 %. It satisfies the engineering requirements.     

Influence of Installing Error on the Surface Shape Precision of the Axial Symmetry Aspheric Workpiece in Lapping

A method to calculate the surface shape error, which is caused by the installing error between the workpiece and the lapping tool in the process of form lapping, is proposed. The mathematical model which the installing translation error influences on the workpiece surface shape error is established. The changing rule of the error is simulated through the calculating example of the paraboloid workpiece. The results indicate that the surface shape error of the workpiece is increasing with the increase of the installing translation error, it is also increasing gradually along the center point of the curve surface to the edge, and the influence is severer to the curve surface with great curvature than that of the small curvature when the translation error is the same.