自动目标识别(ATR)技术发展述评

能够自动进行目标识别 ( ATR)是现代武器装备力争具备的先进性能之一。从历史回顾、当前状态及未来发展等几个方面对自动目标识别的研究历程、技术现状和发展前景进行了较为详细的论述 ,并指出了当前发展中遇到的主要技术难题及可能的解决办法     

分布式作战仿真接口概念设计

接口设计是实现分布式作战仿真互操作的关键。本文在对高层体系结构研究的基础上 ,提出了一种基于状态空间影子模型的接口概念设计方案 ,分析和论述了相关系统结构、接口数据的表达、接口的构成及其工作原理。     

Discrete equal‐capacity p‐median problem

This paper examines the discrete equal‐capacity p‐median problem that seeks to locate p new facilities (medians) on a network, each having a given uniform capacity, in order to minimize the sum of distribution costs while satisfying the demand on the network. Such problems arise, for example, in local access and transport area telecommunication network design problems where any number of a set of p facility units can be constructed at the specified candidate sites (hence, the net capacity is an integer multiple of a given unit capacity). We develop various valid inequalities, a separation routine for generating cutting planes that are specific members of such inequalities, as well as an enhanced reformulation that constructs a partial convex hull representation that subsumes an entire class of valid inequalities via its linear programming relaxation. We also propose suitable heuristic schemes for this problem, based on sequentially rounding the continuous relaxation solutions obtained for the various equivalent formulations of the problem. Extensive computational results are provided to demonstrate the effectiveness of the proposed valid inequalities, enhanced formulations, and heuristic schemes. The results indicate that the proposed schemes for tightening the underlying relaxations play a significant role in enhancing the performance of both exact and heuristic solution methods for this class of problems. © 2000 John & Sons, Inc. Naval Research Logistics 47: 166–183, 2000.     

惯导系统恒定工作温度的实现研究

介绍了一种实现惯导系统恒定工作温度的方法,并针对该系统的实际特点给出了该系统的硬件和软件组成,大量的实验结果表明该系统具有设计先进合理、可实现性强、可靠性高及可在诸多领域推广等特点.     

国外红外侦察告警装备的新发展

综述了国外机载、卫星载红外告警设备和舰载红外搜索与跟踪系统的最新进展。     

用灰色理论GM（1，1）模型预测主动力装置在不同破坏半径下的生命力

用传统的方法预测主动力装置在不同破坏半径下的生命力 ,存在所需数据量大、不易预测、准确性不高等缺点 .运用灰色理论GM(1,1)模型预测了舰船主动力装置受到武器攻击时在各种破坏半径下的生命力 ,方法简单易行 ,结果准确可靠 ,为决策者进行科学的决策提供了相关的理论依据     

Markovian approximation for manufacturing systems of unreliable machines in tandem

This paper studies production planning of manufacturing systems of unreliable machines in tandem. The manufacturing system considered here produces one type of product. The demand is assumed to be a Poisson process and the processing time for one unit of product in each machine is exponentially distributed. A broken machine is subject to a sequence of repairing processes. The up time and the repairing time in each phase are assumed to be exponentially distributed. We study the manufacturing system by considering each machine as an individual system with stochastic supply and demand. The Markov Modulated Poisson Process (MMPP) is applied to model the process of supply. Numerical examples are given to demonstrate the accuracy of the proposed method. We employ (s, S) policy as production control. Fast algorithms are presented to solve the average running costs of the machine system for a given (s, S) policy and hence the approximated optimal (s, S) policy. © 2001 John Wiley & Sons, Inc. Naval Research Logistics 48: 65–78, 2001     

基于正交最小二乘估计的非线性时间序列的预测

在对非线性时间序列的短期预测中经常采用局部线性化的预测算法 ,原有的算法使用普通最小二乘法 (LS)估计近似线性模型的参数。对于存在噪声的数据 ,该算法的数值稳定性较差。本文在对非线性空间进行局部线性化的基础上 ,采用正交最小二乘方法 (OLS)对线性模型同时进行结构选择与参数辨识 ,改善了数值的病态特性 ,增强了算法的稳定性     

基于最优未知输入观测器的BIT降虚警技术

针对基于模型的机电控制系统BIT中的虚警问题,分析了系统中的信息不确定性和产生虚警的机理,基于最优未知输入观测器方法设计了BIT故障检测诊断系统,该系统对信息不确定性具有较强的鲁棒性,能够充分地抑制虚警。在某机电跟踪与稳定伺服平台BIT系统上进行了试验研究,结果表明机理分析正确,所提方法有效。     

激光陀螺数字抖动控制方法与特性

针对传统的模拟抖动控制系统体积大、灵活性差的缺点,设计了一种基于单片机的新的激光陀螺数字抖动控制方法,建立了陀螺抖动的数学模型,比较研究了传统的模拟正弦波驱动和新的数字方波驱动的抖动特性,指出了后者不同于前者的抖幅变化律及非线性的随机噪声注入方式。仿真和实验证明,该方法能很好满足激光陀螺抖动控制要求,保证陀螺性能。