推进军队政治工作信息化建设的几点思考

政治工作信息化建设是加快军队现代化建设的客观需要,又是充分发挥政治工作服务保障作用的必然要求。必须充分认清军队政治工作信息化面临的形势任务,加快建设步伐。要抓住关键,把握政治工作信息化建设的宏观思路;突出重点,打牢政治工作信息化建设的基础;采取有效措施,确保政治工作信息化建设的跨越式发展。     

Data‐driven variation source identification for manufacturing process using the eigenspace comparison method

Variation reduction of manufacturing processes is an essential objective of process quality improvement. It is highly desirable to develop a methodology of variation source identification that helps quickly identify the variation sources, hence leading to quality improvement and cost reduction in manufacturing systems. This paper presents a variation source identification method based on the analysis of the covariance matrix of process quality measurements. The identification procedure utilizes the fact that the eigenspace of the quality measurement covariance matrix can be decomposed into a subspace due to variation sources and a subspace purely due to system noise. The former subspaces for different samples will be the same if the same variation sources dominate. A testing procedure is presented, which can determine the closeness of the subspaces under sampling uncertainty. A case study is conducted to illustrate the effectiveness of this methodology. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006.     

人机共融的远程态势智能感知系统

针对人与远程无人设备协同精准配合的迫切需求,以机器人操作系统为基础构建了一种人机共融的远程态势感知系统,并开展了实验与分析。该系统以视觉定位技术为基础,以人机感知共融为切入点,通过实时三维场景重建技术与场景一致性融合方法,将无人设备探测到的环境及目标信息进行三维重构,并通过增强现实设备进行显示,与人的视觉信息进行一致性融合,实现无GPS条件下远程无人设备与人所佩戴的增强现实设备之间的协同定位。实验结果表明,系统在近距离时具有较好的人机协同定位准确度,定位精度随着距离的增加而逐渐降低。所构建的系统使无人设备成为人眼的延伸,在不干扰人员正常行动的情况下实现了穿障碍、跨视距的感知能力,在未来信息化作战中可发挥重要作用。     

An efficient and modular modeling for launch dynamics of tubed rockets on a moving launcher

This paper develops a modular modeling and efficient formulation of launch dynamics with marching fire (LDMF) using a mixed formulation of the transfer matrix method for multibody systems (MSTMM) and Newton-Euler formulation. Taking a ground-borne multiple launch rocket systems (MLRS), the focus is on the launching subsystem comprising the rocket, flexible tube, and tube tail. The launching subsystem is treated as a coupled rigid-flexible multibody system, where the rocket and tube tail are treated as rigid bodies while the flexible tube as a beam with large motion. Firstly, the tube and tube tail can be elegantly handled by the MSTMM, a computationally efficient order-N formulation. Then, the equation of motion of the in-bore rocket with relative kinematics w.r.t. the tube using the Newton-Euler method is derived. Finally, the rocket, tube, and tube tail dynamics are coupled, yielding the equation of motion of the launching subsystem that can be regarded as a building block and further integrated with other subsystems. The deduced dynamics equation of the launching subsystem is not limited to ground-borne MLRS but also fits for tanks, self-propelled artilleries, and other air-borne and naval-borne weapons undergoing large motion. Numerical simulation results of LDMF are given and partially verified by the experiment.     

外光电效应中光电流的计算

根据金属中电子系统可假设为具有质量为m的粒子组成的理想费密气体,其在热平衡时服从费密-狄喇克分布规律,导出单位强度单色光束照射金属时所感生的光电流.     

TDOA被动定位方法及精度分析

本文提出了一种利用多站ＴＤＯＡ信息对辐射源定位的非线性方程组求解方法，该方法简洁准确，无需作迭代运算，计算量小。文中给出了该定位方法的精度分析，最后给出了在具体布站条件下的受控区域内的ＧＤＯＰ分布。     

基于神经网络的非线性控制系统自组织辨识

本文首先将自组织神经网络算法向一般化情形引伸，接着把自组织过程应用到一般非线性系统的动态过程分类，使得整个非线性系统能够按照输入输出样本空间的概率密度自组织，成为许多具有不同分类核心和感受野的线性子空间逼近。在此基础上，我们采用通用最小二乘算法，以子空间的非线性问题线性化误差作为依据，并进一步运用自组织神经网络的合作与竞争思想，最终得到一般情形的非线性系统的最小二乘辨识。仿真结果表明了本方法的可行性与优越性。     

一种改进的变步长归一化LMS算法

在以往的基于ＬＭＳ算法的研究中，归一化ＬＭＳ算法（ＮＬＭＳ）增大了算法的动态输入范围，但该算法对噪声很敏感。引入自相关的变步长ＬＭＳ算法（ＶＳＳＬＭＳ）不仅加快了收敛速度，可在非平稳状态下进行快速跟踪，而且消除了独立噪声的干扰，但它无法适应大范围的动态输入。本文综合它们的优点而得到的算法，在低信噪比和大范围的动态输入情况下都有良好的性能。     

分布式软件平台StarBus中接口池的研究与实现

按照ＣＯＲＢＡ标准，阐述了接口池在ＳｔａｒＢｕｓ系统中的作用，介绍了ＳｔａｒＢｕｓ系统中接口池的设计，说明了接口池的内容与结构，实现了ＳｔａｒＢｕｓ系统中的接口池服务，为在ＳｔａｒＢｕｓ系统中实现动态激活提供了保证。     

一种新的选择性漏电故障判别方法及最简电路的实现

分析了小电流接地系统单相漏电故障的特点 ,提出了一种新的选择性漏电判别方法———时序比相法 .在论述该方法的基本原理和特点之后 ,给出了实现这种方法的最简电路 ,介绍了该电路的工作原理 .最后给出了在实验室实验和现场试验基础上作出的结论