一种波束内目标与诱饵 DOA联合估计新方法

拖曳式诱饵干扰下目标和诱饵DOA参数的准确估计是导引头实现目标分选的前提条件。波束内目标和诱饵的存在引起雷达回波混叠和观测耦合,导致常规观测提取与参数测量方法失效。通过挖掘雷达接收回波和、差通道信号条件概率分布协方差所包含的未知参数信息,获得了目标和诱饵DOA估计的解析表达式,针对估计求解中所需相对功率比未知的情况,提出了基于干扰检测、雷达测量与目标跟踪信息辅助循环估计相对功率比的DOA二次联合估计方法。不同干扰条件的仿真实验验证了估计方法的有效性。     

履带车辆转向过程循环功率分析

针对差速式、独立式2类转向机构,分别给出了不计和计及履带接地段打滑条件下最大循环功率及相应的相对转向半径的计算方法,定量讨论了不计和计及履带接地段打滑时循环功率的差别。在示例给定的计算条件下计算结果表明,计及履带接地段打滑时循环功率较不计打滑时小约20％。实车试验结果证实:考虑履带接地段打滑计算的循环功率同实际值更接近,在分析循环功率时不能忽略履带接地段的打滑。     

弹目交会条件的分布规律

提出了研究弹目交会条件分布规律的必要性,阐述了空空导弹六自由度弹道仿真数学模型。通过对大量的数字仿真结果进行统计分析,得出了导弹脱靶量和弹目交会角的重要分布规律,为进一步研究导弹单发杀伤概率的分布规律及其影响因素奠定了基础。     

关于U算子有界性的证明

利用Hardy Littlewood极大算子及性质与分数次极大算子及性质 ,证明了u(x)在Lq(Rn) ,L∝ ,Lq(E)空间上是有界的 ,Coσoπeβ定理应予以推广。     

Iterative coloring extension of a maximum clique

In this paper we present an improved branch and bound algorithm for the vertex coloring problem. The idea is to try to extend the coloring of a maximum clique to its adjacent vertices. If this succeeds, its successive neighbors are considered; in case of failure (i.e., in the case the initial colors are not sufficient), working on the subgraph induced by the maximum clique and its neighborhood, the lower bound is improved by seeking for an optimal coloring of this subgraph by branch and bound. The process is repeated iteratively until the whole graph is examined. The iterative scheme exploits a further lower bound obtained by integrating a simple algorithm into the maximum clique search, and a new method to compute upper bounds on subgraphs. Furthermore, a new branching rule and a method for the selection of the initial maximum clique are presented. Extensive computational results and comparisons with existing exact coloring algorithms on random graphs and benchmarks are given. © 2001 John Wiley & Sons, Inc. Naval Research Logistic 48: 518–550, 2001     

坦克火控首发命中率试验脱靶弹数据处理方法

通过对出现脱靶弹情况下的散布特征参数估计方法的研究 ,建立了正态双边截尾样本均值和方差估计数学模型 ,并给出了数值计算方法 ,为坦克火控系统首发命中概率试验脱靶弹数据处理提供了理论依据。     

高效计算网格壁面距离的KD树方法

计算流体动力学的一些领域中经常要用到流场点到壁面的最小距离,为了提高壁面距离计算的精度和效率,将KD树应用于非结构网格的壁面距离计算,计算了若干三维外形的壁面距离,结果表明:基于KD树的网格壁面距离计算方法鲁棒性好,计算效率和结果精度高,适应复杂外形的能力强;算法的通用性好,可以拓展应用到多种网格类型。     

基于集对分析的战场态势分析模型

在防空作战中,战场态势的分析非常重要,它是辅助决策的基础.针对战场态势的问题,以集对分析的同异反联系度和距离测度为基础,构造了战场态势的分析模型,进行了深入探讨.最后,通过实例计算表明了分析模型对于评估战场态势的可行性和有效性.     

Single machine sequencing with linear models of release dates

The paper deals with a problem of scheduling a set of jobs on a single machine. Before a job is released for processing, it must undergo some preprocessing treatment that consumes resources. It is assumed that the release date of a job is a linear decreasing continuous function of the amount of a locally and globally constrained, continuously divisible resource (e.g., energy, catalyzer, financial outlay, gas). The problem is to find a sequence of jobs and a resource allocation that will minimize the maximum job completion time. Such a problem appears, for example, in the ingot preheating and hot-rolling process in steel mills. It is shown that the problem is strongly NP-hard. Some polynomially solvable cases of the problem and approximate algorithms with both experimental and worst-case analysis are presented. © 1998 John Wiley & Sons, Inc. Naval Research Logistics 45: 99–113, 1998     

内闭环火控系统技术研究

内闭环火控系统技术研究,是鉴于我国目前对脱靶量检测仪器尚不能很好地解决的情况下,提出的一种折衷的技术途径。它对引起脱靶量的几种主要误差因素的可校正性进行了分析,利用火控、校正、数字图像合成、误差预测和炮控计算机系统,完成内闭环控制、仿真模拟火控系统的脱靶量,将热线控制原理应用于该系统,并提出了工程实现的方案。