偏最小二乘回归在导弹研制费用预测中的应用

分析了影响导弹研制费用的性能参数,提出用偏最小二乘回归方法来预测导弹研制费用.该方法对变量进行主要成分分析、典型相关分析和多元性回归,在处理存在多重线性相关的小样本多元数据方面精确度高.实例证明,该方法在导弹研制费用的预测应用中可行且精确可靠.     

应用改进的BP神经网络预测导弹的研制费用

结合导弹武器系统研制的特点，分析并确定了影响导弹武器系统研制费用的主要因素，并在前人研究的基础上，提出了基于改进的BP神经网络的费用预测模型。该模型不仅克服了以往由于专家主观因素而造成的负面影响，而且提高了算法的运行效率和模型的预测精度。通过具体的实例分析比较，充分证明了利用该方法的科学合理性。最后探讨了利用BP神经网络进行数值预测的方法和应该注意的问题，并给出了一些有益的建议。     

基于改进PSO-LSSVM 的军用工程机械研制费用预测模型

针对传统参数法对装备研制费用进行预测存在的局限性问题,采用改进粒子群算法（particle swarm optimization,PSO）对LSSVM模型进行改进,构建军用工程机械研制费用预测模型。运用2种优化策略改进粒子群算法,对种群初始化过程进行控制、克服粒子群算法易于早熟的缺点。用改进后的粒子群算法优化最小二乘支持向量机的模型参数和核参数,以获得更好的预测效果。预测结果表明：该费用预测模型运用于军用工程机械研制费用预测,明显优于传统预测模型,具有很好的预测精度和效率。     

基于参数法的3种研制费用估算模型

以防空导弹武器系统研制费用估算为研究对象,阐述了参数费用法中数据收集整理和自变量的选取两个重要内容,介绍了最小二乘、偏最小二乘和BP神经网络的原理,然后以国外8种型号导弹研制费用为实例,研究了如何建立这3种研制费用估算模型,最后对3种估算模型的计算结果进行了对比分析,得出了3种估算模型的优劣,并阐明了原因。本研究结果,对防空导弹武器系统研制费用的估算具有积极的参考意义。     

基于组合神经网络的装备研制费用预测研究

利用组合神经网络预测法.对装备研制费用进行预测研究.采用了两层预测系统第一层用灰色模型和神经网络分别对装备研制费用进行预测,第二层用BP网络对第一层的输出进行组合预测.通过对某型装备研制费用的预测分析,证实了本模型的科学性与正确性.     

导弹武器系统研制费用模型的建模思想，方法及实际应用

以导弹武器系统的研制为例，给出建立导弹武器系统研制费用模型的基本思想，假设费用模型构造的基本形式，以及在实际中的应用。     

基于BP网络的导弹研制费用预测

根据导弹武器系统研制的特点，分析并确定了影响导弹武器系统研制费用的主要因素，提出了基于人工神经网络的费用预测模型。该模型不需要确定各因素的定量关系，克服了以往由于专家主观因素而千万的负面影响，最后通过实际应用，说明了该方法简便易行，精确可靠。     

飞航导弹经济性的探讨

预测和估算费用是探讨经济性的一种方法,它是一项十分困难但又是非常重要的工作。正确的决策既取决于过去的经验,又取决于对未来的判断。特别是当今,导弹设计计中的研制费用已逐步成为重要的设计参数之一,更需要在型号的规划预研阶段,较早地预测出研制阶段的总费用。而随着对导弹性能要求越来越高,导弹武器系统的研制费用逐年增长,飞航导弹的研制费用也不例外,也在逐年增长。这就促使我们必须精细地研究导弹性能和研制经费之间的综合关系。     

基于BP神经网络的飞机机体研制费用估算

提出一种应用人工神经网络预测飞机机体研制费用的方法.该方法利用偏最小二乘法对飞机性能参数进行了主成分提取,用这些主成分作为BP网络的输入变量,建立了一种基于BP神经网络的飞机研制费用的估算模型,应用该模型对典型的飞机机体研制费用进行了预测.预测结果表明,该方法是有效的、可行的.     

基于变精度粗糙集的导弹需求量预测模型

建立了基于变精度粗糙集的战时导弹需求量预测模型。在对导弹需求量影响因素分析的基础上建立了导弹需求量预测决策表,采用基于属性重要度的启发式算法求解β近似约简,从而获取导弹需求量预测的相关规则。结果表明,该模型具有一定的有效性,为战时导弹需求量预测提供了一种新的途径。     

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.     

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。     

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.     

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.