某型空空导弹控制舱检测设备设计

对某型空空导弹控制舱检测设备进行了总体设计。采用8031单片机,提出各类参数的检测方案,并对系统采取了抗干扰措施。     

A dual criteria sequencing problem with earliness and tardiness penalties

We consider the problem of sequencing n jobs on a single machine, with each job having a processing time and a common due date. The common due date is assumed to be so large that all jobs can complete by the due date. It is known that there is an O(n log n)‐time algorithm for finding a schedule with minimum total earliness and tardiness. In this article, we consider finding a schedule with dual criteria. The primary goal is to minimize the total earliness and tardiness. The secondary goals are to minimize: (1) the maximum earliness and tardiness; (2) the sum of the maximum of the squares of earliness and tardiness; (3) the sum of the squares of earliness and tardiness. For the first two criteria, we show that the problems are NP‐hard and we give a fully polynomial time approximation scheme for both of them. For the last two criteria, we show that the ratio of the worst schedule versus the best schedule is no more than . © 2002 Wiley Periodicals, Inc. Naval Research Logistics 49: 422–431, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/nav.10020     

基于改进平方根UKF双向滤波的单站无源定位算法

针对单站无源定位可观测性弱、观测噪声大而导致的定位精度低、稳定性差和收敛速度慢等问题,在结合平方根无迹卡尔曼滤波(Square-Root Unscented Kalman Filter,SRUKF)以及后向平滑思想的基础上,提出了一种改进SRUKF的双向滤波算法。该算法采用Q-R分解的形式,使用误差协方差的平方根代替协方差参与递推运算,提高了算法的稳定性与运算效率。同时,该算法对状态向量进行扩维,将过程噪声与观测噪声通过非线性系统传播,降低了噪声对滤波精度的影响,并利用当前时刻滤波结果通过Rauch-Tung-Striebel(RTS)后向平滑得到再次前向滤波更高精度的起始值,提高了算法的定位精度与收敛速度。仿真结果表明,新算法在保证实时性的基础上改善了单站无源定位的性能。     

Single machine just‐in‐time scheduling problems with two competing agents

In scheduling problems with two competing agents, each one of the agents has his own set of jobs to be processed and his own objective function, and both share a common processor. In the single‐machine problem studied in this article, the goal is to find a joint schedule that minimizes the total deviation of the job completion times of the first agent from a common due‐date, subject to an upper bound on the maximum deviation of job completion times of the second agent. The problem is shown to be NP‐hard even for a nonrestrictive due‐date, and a pseudopolynomial dynamic program is introduced and tested numerically. For the case of a restrictive due‐date (a sufficiently small due‐date that may restrict the number of early jobs), a faster pseudopolynomial dynamic program is presented. We also study the multiagent case, which is proved to be strongly NP‐hard. A simple heuristic for this case is introduced, which is tested numerically against a lower bound, obtained by extending the dynamic programming algorithm. © 2013 Wiley Periodicals, Inc. Naval Research Logistics 61: 1–16, 2014     

面向大型机构的统一身份管理方法

通过借鉴自由联盟组织提出的Liberty框架,并针对该框架的结构以及身份提供者之间信任关系的建立模式进行改造,提出一种面向大型机构的新型身份管理联盟。新型的身份管理联盟比Liberty框架更加适用于具有分布性、自治性、全局性和协同性的大型机构。新型的身份管理联盟在物理结构上可看作由多个身份提供者节点组成的一棵树,其中每个身份提供者节点必须并且只能与其父节点和子节点建立信任关系,这与现实中各个大型机构的树状层级结构是完全相符的。在系统实现过程中,依托新型身份管理联盟的树状结构,并采用LDAP实现了用户认证数据的分级存储。此外还通过安全认证网关在网络层对用户的接入进行控制,从而能够同时支持B/S和C/S两类应用系统的单点登录。     

金属化聚丙烯膜脉冲电容器过载特性研究*

脉冲电容器作为爆磁压缩激励电流源的储能元件之一,通常要求单次可靠运行。正是由于单次运行,为脉冲电容器的过载工作提供了极大的可能。过载工作的电容器与额定电容器相比具有体积小、重量轻的优点,可实现爆磁压缩激励电流源的紧凑化。本文研究了不同温度下国产金属化聚丙烯膜脉冲电容器的过载特性,如过载运行的储能密度,放电电流及可靠度等。实验表明：在-45℃~60℃范围内过载运行这种电容器,其储能密度可达额定储能密度的1.8倍,同时在0.95的置信水平下,其过载运行的可靠度单侧置信下限为0.9,可以实现稳定可靠运行。     

弹载星敏感器应用方案比较研究

简述了弹载星敏感器几种应用方案的原理,从视场大小、导航星等、观星方式、像元分辨率、三轴姿态精度、动态性能、惯性基准误差分离等方面分析、比较了各种方案的优缺点.除平台方案外,捷联星图方案和单(双)星方案的技术参数相当,动态性能均有待提高.星图方案较单(双)星方案在2个方面占优势:一是星图方案不要求调整星敏感器光轴对准导航星,星跟踪算法等技术能快速识别星图;二是星图方案可同时、连续观测6～8颗星,解算出弹体三轴姿态,可以采用先进的滤波技术准确地分离惯性基准误差.     

基于循环频域滤波及Schmidt正交对消的单通道信号分离算法

单通道盲信号分离是信号处理领域中的研究热点和难点.分析了循环频域滤波用于单通道时频重叠信号分离的可行性,提出了基于循环平稳频移滤波器及Schmidt正交对消的信号分离方法.利用频移滤波器提取一个源信号,通过Schmidt正交化法从观测信号中消去已提取的源信号获得另一个源信号.仿真表明,本文算法可有效分离时频重叠的雷达通信信号,相比时域维纳滤波,分离性能提高了10dB以上.     

稳像式火控系统实车训练装置的研制

该训练装置可以在安装稳像式火控系统的坦克上完成射击基础练习的训练与考核.它以单片机为核心,在射击操作与实车相同的条件下,具有自动检靶,自动记录发射数、命中数,自动变换目标,自动报警,自动评定和显示成绩等功能.射手可独自在坦克内操作,自行开始练习,自我检查操作结果.     

装备器材库温湿度监控系统的设计与实现

军用装备器材仓库温湿度监控是目前亟待解决的问题.文中详细地阐述了种切实可行的设计方法--主从式两级数字化监控系统的设计原理与实现方法,并用Borland C++Builder语言对其组态软件进行程序设计.