舰船装备保障能力评估指标及建模方法

针对舰船保障能力的精准评估问题,建立舰船全寿期保障能力评估指标体系及各指标的计算模型。构建 舰船装备保障能力评估指标体系,包括各种指标的计算模型;制定调研策略、基本数据结构和数据处理方法;选取 某个舰船系统进行案例计算。结果表明：构建的简易、实用舰船装备保障能力评估指标体系及各种指标的简易计算 模型,可用于舰船相关系统的保障能力评估。     

舰载机救援装备效能评估指标体系

为解决舰载机救援装备效能评估过程中目标与实现未达到完全匹配的问题,构建一种效能评估指标体系.通过舰载机救援装备效能评估指标的分类和指标体系的构建准则,对构建装备效能评估指标体系过程及普遍性问题进行分析,基于"软件体系框架结构"的概念,提出效能评估指标体系构建的规范过程,根据舰载机救援装备效能评估任务的目标和要求,建立效能评估指标体系结构,并对指标有效性进行检验,运用主客观组合赋权的方法确定指标权重.该研究具有较好的应用价值,建立的指标体系为舰载机救援装备效能评估奠定了基础.     

舰船装备海上维修对表面工程技术的需求

为提升舰船装备海上维修能力,采用任务能力分解方法,开展了表面工程技术在海上维修中的应用研究。在对现阶段装备维修中广泛采用的表面工程新技术详细分析的基础上,围绕舰船装备海上维修过程中存在的备件精确化保障难度大、经费支撑有限、伴随维修保障能力亟待提高等诸多问题,开展舰船装备海上维修的表面工程技术需求分析及案例研究工作。分析研究表明:传统的"前换后修"维修模式不足以完全满足舰船装备的海上维修需求,在远洋舰船编队(或本船)的维修设备配置中选配基于表面工程新技术的先进维修设备能够实现装备零部件的现场快速修复及成形再制造,有效解决海上维修面临的备件携行空间有限、经费不足、筹措困难等难题,是强化舰员级维修能力、提升海上伴随维修保障能力的一项重要手段。     

装备维修保障效能评估指标体系

装备维修保障效能评估指标体系对于战时维修保障系统的建设、优化和评估具有十分重要的地位．分析了装备维修保障效能与能力的区别,从装备维修保障效能影响因素和战时维修保障任务需求2个方面着手,分析了装备维修保障效能构成,并遵循建立指标体系的原则,对效能指标进行层层分解,最终给出装备维修保障效能评估指标体系．     

考虑随机共因失效的战时合成部队任务成功概率仿真评估

共因失效是装备遂行作战任务过程中存在的一种常见现象,是影响战时装备任务成功概率的重要因素。分析合成部队装备层次结构,构建合成部队作战任务剖面,并对合成部队装备共因失效和维修保障特点进行分析;以合成部队进攻阶段任务为研究对象,提出合成部队任务成功要求;充分考虑随机共因失效、多种类装备、多作战单元协同作战、随机任务时间、换件修理时间等复杂因素对战时合成部队任务成功性的影响,建立基于蒙特卡洛方法的合成部队作战任务成功概率仿真评估模型;通过算例,验证仿真模型的可行性和有效性。研究结果表明：所建模型能够用于战时合成部队任务成功概率评估和作战任务时间的规划;合理配置各类备件的携行数量,可以提升战时合成部队任务成功概率。     

航空装备保障特性综合评估指标体系

科学完善的评估指标体系是考核验证航空装备保障特性的前提和和基础。提出了航空装备保障特性综合评估指标体系构建原则,基于航空装备综合保障目标要求,对保障特性综合评估指标进行了分析、筛选和分解,构建了航空装备保障特性综合评估指标体系。     

战时装备保障分队生存能力评估

针对当前战时装备保障分队生存能力评估较少或不足的问题,综合考虑了各种因素的作用,提出了战时装备保障分队生存能力评估指标体系,并运用AHP法和模糊综合评判相结合的方法对装备保障分队生存能力进行了有效评估,得出了应对修理营的机动性和修理效率进行重点改进的结论,同时给出了相关建议。     

基于CM-FCE-AHP的战时维修器材供应保障能力评价研究

战时维修器材供应保障具有高度的复杂性、随机性和动态性,导致战时维修器材供应保障评价的不确定性和模糊性。以战时维修器材供应保障任务与流程为依据构建保障能力评价指标体系,提出一种基于云模型的层次分析法和模糊综合评价方法,对战时维修器材供应保障能力进行客观评价。利用云模型对判断矩阵进行标度并聚合,得到指标权重,降低权重计算的主观性和随机性;利用云模型描述评价矩阵,得到隶属度矩阵。评价结果表明,指标体系能够很好地反映战时维修器材供应保障能力,改进的综合评价方法能有效解决战时维修器材供应保障能力评价中的高度模糊性和不确定性,提高评价结果的鲁棒性和客观性。     

基于贝叶斯网络的战时装备维修保障效能评估

从战时装备维修保障效能定义入手,深入剖析装备维修保障效能和装备维修保障能力的区别,以贝叶斯 网络理论为基础,结合装备维修领域专家经验知识,建立以装备指挥效能、供应保障效能、装备维修效能等为主要 评估指标的战时装备维修保障效能评估模型。依托Netica 软件实现战时装备维修保障效能评估贝叶斯网络构建,采 用梯度下降法进行网络参数学习,并结合实际案例证明模型的可行性。     

基于集对论的导弹装备技术保障能力评估

针对导弹装备技术保障能力评估中存在的诸多不确定问题,依据导弹保障建制的分类构建导弹装备技术保障能力评估指标体系,基于集对论的思想,建立导弹装备技术保障能力集对评估模型。为了使得到的评估指标权重向量同时反映主观程度和客观程度,提出通过构造一个双目标决策问题,进行主客观综合赋权确定指标权重的方法。实例分析表明,该方法通过联系度量化了评估指标的确定程度,提高了评估结果的可信性,对解决导弹装备技术保障能力评估中不确定性问题具有很强的指导作用。     

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.