E级高性能计算机系统中监控分系统的挑战与设计

随着E级高性能计算机系统组装密度成倍增加,结点规模不断扩大,监控分系统在可扩展性、可靠性、可服务性和高效运维上面临巨大挑战。针对这些挑战,从架构、网络、功能和运维4个方面介绍了监控分系统的设计思路,并通过原型系统验证了部分设计的可行性与优势,对未来E级系统的构建具有较大的支撑作用。     

捷联惯性导航航空数字接口系统研究与应用

对某型捷联惯性导航系统的系统设计和开发思路进行了介绍，说明了捷联惯性导航系统的结构。根据航空数字接口系统中所涉及的通信协议，完成了航空数字接口程序的模块化软件设计。测试结果表明，该捷联惯性导航航空数字接口系统的设计是成功的。     

立体成像数据采集和记录

论述了用于空间机载立体成像技术的高分辨率双路CCD图像的采集、记录的基本原理、方法及其主要特点。研制成功了用于机载或星载的图象采集卡和记录系统,并进行了室内立体成象试验,获得了满意的三维立体图像。     

子系统在网络系统可靠性中的相对重要度

运用网络系统可靠性符号表达式，给出各子系统在网络系统可靠性的相对重要度，验证并扩展了已有研究成果的结论，得出了当子系统在不同可靠度情况下，各子系统在网络系统可靠性中具有不同重要度的重要结论，在工程和管理实际中具有重要价值．     

Kinematics Analysis of Motion Simulation Subsystem for Unmanned Vehicle

Unmanned vehicle has attracted wide attention and interests throughout the world since it first deputed in the 1960s. However, the experimental methods for unmanned vehicle’s intelligent behavior, such as semi-physical simulation and motion subsystem, have not been widely explored. First, the requirements of the motion subsystem in unmanned vehicle semi-physical facility are analyzed, and a six DOF parallel manipulator is selected to reproduce the pose of the vehicle. The link lengths of the motion subsystem are worked out under the given rotational angles of the vehicle. According to the geometric properties of tetrahedron, three joint positions of the top platform are determined, and the rest are obtained from the first three position vectors. Six constraint equations are set up based on the vertices on the top platform and the link lengths. In order to solve the six angle variables, a numerical algorithm built on the Newton-Raphson iterative method is presented, which is based on Taylor series expansion of six constraint equations. The pose of the top platform is ultimately calculated. The eigenvalues of the top platform are solved to obtain the natural frequencies of the motion subsystem. The coordinates of six joint centers on the top platform and six constraint equations can be realized by simple algebraic manipulation, which allows significant abbreviation in the formulation and provides a systematic way of obtaining the kinematic solution of the parallel manipulator. A numerical example is given and its efficacy is demonstrated by the inverse kinematics. The computation strategy based on tetrahedron method and Newton-Raphson iterative method provide a simple and cost-effective method for solving forward kinematics of six DOF parallel manipulators, and this method sheds light on other parallel manipulators.     

某雷达天线俯仰控制及威力显示系统的软件设计

介绍现在雷达天线俯仰控制及显示系统的缺点，提出采用单片机控制 、液晶显示威力图的方式改造天线俯仰系统，文中给出系统软件的设计，重点介绍液晶显示软件设计。     

L3能源管理子系统功能拓展的实现

在原有能源管理子系统功能充分发挥的基础上,通过用户的不断使用和优化,提出在能源管理子系统中增加相应的异常数据分析和提示功能、用户变更信息的反馈功能、重点能源设备的点检维护以及能流图增加计算平衡等的功能,以进一步拓展和挖掘管理系统的功能优势,满足不锈钢分公司能源管理的需要,实现管理创新。     

椒图JHSE构建三级安全环境

服务器操作系统作为关键业务应用和重要信息数据的承载平台,在信息安全保障体系中处于核心位置。与以往人们认知的安全产品不同,椒图科技研发出的椒图主机安全环境系统(JHSE),拥有多项国家发明专利和200多项全新技术,通过重构操作系统的安全子系统(SSOOS),对现有服务器操作系统的安全等级进行动态、透明地提升。JHSE的安装、使用不会影响原有应用的业务逻辑和业务连续性,甚至不需要重新启动服务器,是一款适用于金融、电信、海关、税务等各领域的通用型安全操作系统。     

轨道交通旅客信息系统方案设计

摘要旅客信息系统是运用计算机及网络技术与多媒体技术进行信息的多样化显示。由控制中心子系统、车站子系统、网络子系统及车载子系统组成，实现对乘客所需信息的采集、制作、编辑、管理、发布、传递，最终在显示终端进行信息显示，向乘客提供实时、直观、有效、形象的各种信息资讯。     

A general stability criterion for switched linear systems having stable and unstable subsystems

We report conditions on a switching signal that guarantee that solutions of a switched linear system converge asymptotically to zero. These conditions apply to continuous, discrete‐time and hybrid switched linear systems, those having both stable subsystems and mixtures of stable and unstable subsystems. Copyright © 2012 John Wiley & Sons, Ltd.