基于面向对象的智能决策支持系统模型库自动选择

面向对象的智能决策支持系统(IDSS)模型库管理系统的模型自动选择方法有多种.基于人工神经网络方法,通过人机交互接口将问题分解出的文字特征分解为问题的目标和初始态要素,再用智能识别器推理并选择模型.基于遗传算法的模型自动选择通过决策树表示以实现.基于自然语言理解的模型自动选择方法,通过加入问题识别模块实现.基于灰色关联度方法,通过自然语言理解法对用户的问题进行分析再选择适合问题的模型.     

QTZ25塔式起重机起升机构的改进设计

分析了原起升机构在电机选择，调速方法，制状况等上存在的缺陷。并根据该塔机的起吊参数结合使用功能，对起升机构进行了改进设计，满足了用户的使用要求。     

数值仿真中湍流模型的选择

文中主要讨论FLUENT软件在数值仿真中网格类型和计算模型对仿真结果的影响。在分析湍流流动特征的基础上，说明湍流模型对计算网格的要求并提出了湍流模型的选择方法，然后通过实例对此方法进行了具体说明。     

降落伞流场数值模拟方法研究

应用有限体积法求解可压流的N-S方程，采用K-ERNG模型作为湍流模型，对某降落伞稳定下降阶段的流场特征进行了数值模拟，同时提出了数值仿真中湍流模型的选择方法。     

导弹的终端仿真

为正确评价导弹的战斗部效果，建立了模拟导弹与目标最接近炸引信与战斗部的工作，战斗部破片对目标的冲撞等的计算模型，开发了利用这些模型进行计算机仿真（简称终端仿真）和评价截击性能的方法。介绍了在终端仿真的作用及仿真方法，包括建模参数的选择，近炸引信模型，战斗部模型和目标破坏程度的判断等。     

地空导弹武器选型方案模型决策初探

运用模糊数学的原理和方法，建立了地空导弹武器选型方案的多级模糊综合评判模型，对评价因素中的模糊概念作了恰当的描述，客观地反映了实际。同时给出了选择地空导弹型号的评价因素指标体系，并简单介绍了选型的具体实施方法。     

基于用户偏好的地理计算应用检索

针对现有检索系统对用户过去行为和历史数据关注较少的问题,笔者提出一种基于用户偏好的地理计算应用检索方法。以地理计算领域中的应用检索为背景,基于互联网信息检索中的用户偏好模型,通过分析用户搜索地理计算应用历史,充分考虑用户对地理计算应用的最近访问时间对确定用户偏好的影响,提取用户偏好因子矩阵和时间因子矩阵,算出与用户查询最相关的地理计算应用。实验结果表明,该方法能有效提高用户对地理计算应用的检索效率,为地理计算应用检索优化提供有力支撑。     

三星定位算法的研究

提出了一种利用多普勒测量量和伪距测量量相结合进行静态三维定位的算法。该算法不仅可以求解用户的三维位置，而且可以求出接收机的时钟偏差和频率偏差。经过进一步的改进，还可以实现对动态用户的定位和测速。文中对所提出的算法模型进行了计算机仿真，仿真结果证明了该算法的正确性及实用性。     

高超声速飞行器后体内部喷管设计

利用了CFD软件对二维非对称喷管进行数值模拟，分析了不同内部喷管长度下，喷管压力、推力、升力和俯仰力矩的变化规律，以及对后体喷管性能的影响．提出了一种内部喷管长度选择方法，并采用这种方法所得的结论与NASA公布的模型进行比较，表明提出的方法具有可行性．     

基于GIOWA的地空导弹总体方案选择研究

文中对属性值以模糊语言的形式给出的多属性决策问题进行了研究,针对地空导弹总体方案的选择问题．采用基于GIOWA算子的方法,建立了总体方案的选择模型。通过对某地空导弹总体方案选择问题的实例研究．结果表明,模型的可用性,检验了模型的实用性。     

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.