基于粒子群优化算法的子母弹最佳抛撒半径选择

子母弹抛撒半径是由产品和射击条件决定的,是评定子母弹打击效果的必要条件.为了使子母弹对目标的打击效果达到最佳,需要确定子母弹最佳抛撒半径.针对子母弹打击机场跑道问题,通过Monte Carlo方法模拟子弹落点并计算机场跑道的失效率.基于粒子群优化算法,对子母弹抛撒半径进行优化求解,使跑道失效率达到最大值.仿真结果表明,粒子群优化算法能够有效的达到或接近全局最优.同时,与遗传算法相比,粒子群优化算法收敛速度更快,精度更高,能够有效的求解子母弹最佳抛撒半径问题.     

直升机悬停双雷齐射初探

针对直升机投雷一般采用单雷射击的现状,提出了采用直升机悬停双雷齐射的方法。通过对双雷齐射搜索面的组织、目标可能位置区域、齐射射击瞄准点的选取以及潜艇规避机动模型的分析,建立了潜艇纯机动规避情况下鱼雷命中概率仿真模型。仿真结果表明,与单雷射击相比,双雷齐射可有效提高对目标的发现概率,并能弥补单雷射击在大舷角时命中概率较低的不足,在相同发现概率条件下双雷齐射对目标的射击距离更远。     

舰空导弹射击方案优选模型研究

为了提高舰空导弹防空反导的作战效能,充分发挥其火力综合控制优势,对舰空导弹射击问题进行研究。基于对舰空导弹射击方案的分析,采用分三步优选的方式寻求最佳的射击方案,首先按照目标来袭态势确定舰空导弹最多可拦截次数,在拦截次数范围内,按照不同的拦截次数、每次不同的发射数量确定可以满足毁伤预期的射击方案;其次就满足毁伤预期的射击方案根据发射时间筛选出最早毁伤瞬时射击方案和最大毁伤概率方案;最后利用射击方案模糊优选模型对筛选出的射击方案进行模糊优选,通过实例分析证实了该方法的合理性。     

动态规划法在防空群火力分配中的应用

根据来袭目标威胁程度,运用动态规划法可解决防空群火力分配中目标-武器的最佳分配.首先建立相关模型及其目标函数,并求出发射弹数,再求所有来袭目标构成的威胁值,最后处理所有来袭目标.以防空导弹对三个来袭目标的最佳分配数为例,通过分别确定导弹射击数及向第二个来袭目标射击的导弹数,再由纵横交叉查表确定最小威胁值.     

舰空导弹低空区对单个目标作战能力仿真模型

以导弹的单发杀伤概率为基础,对舰空导弹的低空作战能力进行科学评估。首先,对众多武器系统射击效能指标进行分析和筛选,建立适合对舰空导弹低空作战能力进行评估的指标体系,包括对单个目标和单个目标群2个方面。然后对每一指标进行具体分析建立相应的数学模型。对低空作战能力的仿真计算出各种射击方式下的杀伤概率,通过对仿真结果数据表格的分析,得出对典型目标和目标群的最优射击方案。     

基于混合离散粒子群算法的多无人作战飞机协同目标分配

针对多无人作战飞机(UCAV)协同目标分配问题,提出了一种基于混合离散粒子群算法的多UCAV协同目标分配方法。混合离散粒子群算法根据多UCAV协同目标分配问题的特点,设计了新的粒子群位置和速度更新公式,并且充分利用粒子群优化算法的全局搜索能力,同时利用禁忌搜索的局部搜索能力,使2种算法的优势得到互补,较为显著地提升了原算法的性能。仿真结果表明:混合离散粒子群算法能够有效地解决多约束条件下多UCAV协同目标分配问题,并且算法简单、灵活,易于实现和扩展。     

基于杂交粒子群算法的弹炮混编防空群火力优化模型

针对弹炮混编防空群射击指挥中的火力分配问题,提出了弹炮混编防空群的火力分配方法,建立了优化的火力分配数学模型。在此基础上,借鉴遗传算法中的杂交概念,采用改进后的粒子群优化算法对此模型求解。通过算例和仿真结果与实际经验对比表明,改进粒子群优化算法是解决弹炮混编防空群火力优化分配问题的一种有效方法。     

防空导弹武器系统的目标分辨能力对射击效能的影响

防空导弹武器系统的目标分辨能力是影响射击效能的主要因素之一，对于一个密集目标群，能分辨每一个目标和不能分辨每一个目标射击效能有很大的差别，不能分辨每个目标时，射击效能大幅度下降，分析表明，对群目标（不能分辨每个目标情况下的密集目标群）实施间隔射击，可一定程度地提高射出效能。     

交叉粒子群算法在空间飞行目标定位中的应用

针对现有目标定位求解算法推导复杂、工程实现困难的缺点,提出了一种基于交叉粒子群算法的空间飞行目标定位方法。通过建立飞行目标定位模型,引入遗传算法中的交叉因子改进标准粒子群算法,实现了空间连续飞行目标的定位。仿真结果表明利用交叉粒子群算法能有效地对空间飞行目标进行定位,定位精度达到0.5%。该方法可广泛应用于导弹、飞机等飞行目标定位领域。     

弹丸飞行时间与射击诸元关系分析

为提高火控计算机弹道计算精确度,减小射击误差,提出一种射击诸元与弹丸飞行时间 tf关系的算法分析。通过射击诸元与 tf的灵敏度解析表达式,分析了 tf计算精度在不同航路段对射击诸元影响的大小。利用3条航路进行灵敏度曲线仿真,在不同目标速度下,定量分析了弹丸飞行时间对射击诸元即火炮高低、方位角的影响。仿真结果表明：在航路捷径附近,对1000 m距离上的目标射击误差方位为0.5 m、高低向0.1 m;因此,要减小射击误差,关键之一是提高弹丸飞行时间的计算精度。     

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.     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

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.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

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.     

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.