线性奇异系统的最优极点配置

讨论了线性奇异系统在满足闭环极点要求的同时使系统最优的问题．在系统是正则束及能稳和能检测的前提下，给出了多输入多输出系统最优极点配置满足的条件及算法．     

On the Limitations of Redundancies in the Improvement of System Reliability

Some program managers share a common belief that adding a redundant component to a system reduces the probability of failure by half. This is true only if the failures of the redundant components are independent events, which is rarely the case. For example, the redundant components may be subjected to the same external loads. There is, however, in general a decrease in the failure probability of the system. Nonetheless, the redundant element comes at a cost, even if it is less than that of developing the first one when both are based on the same design. Identical parts save the most in terms of design costs, but are subjected to common failure modes from possible design errors that limit the effectiveness of the redundancy. In the development of critical systems, managers thus need to decide if the costs of a parallel system are justified by the increase in the system's reliability. NASA, for example, has used redundant spacecraft to increase the chances of mission success, which worked well in the cases of the Viking and Voyager missions. These two successes, however, do not guarantee future ones. We present here a risk analysis framework accounting for dependencies to support the decision to launch at the same time a twin mission of identical spacecraft, given incremental costs and risk-reduction benefits of the second one. We illustrate this analytical approach with the case of the Mars Exploration Rovers launched by NASA in 2003, for which we had performed this assessment in 2001.     

论邓小平关于加强党的制度建设思想

邓小平同志在深刻总结国际共产主义运动风雨历程和党的建设历史经验的基础上,深谋远虑地提出了一系列加强党的制度建设的重要思想:加强党的制度建设至关重要,"关系到党和国家是否改变颜色";加强党的制度建设,要以坚持和改善党的领导为原则,要以贯彻民主集中制为根本,要以强化党内监督为保障.     

TRIPS中的利益平衡机制和创新成果评价原则

TRIPS协议中关于社会公众利益与创新者利益之间的平衡机制、创新成果的评价准则等方面的思想,充分体现了知识产权保护的宗旨和目标,对我国的知识产权管理工作有重要启发意义。     

VHS录像机软件伺服系统的开发

对ＶＨＳ录像机伺服系统的三种设计方法进行了比较，重点介绍了软件伺服的特点、原理及所需的硬件与软件算法，讨论了超级定时器单元的使用、伺服误差的计算、补偿滤波器的设计、特技放像的处理等。软件伺服系统的开发，对实现ＶＨＳ录像机关键技术的国产化有重大意义，并可推广至自控、通信等领域，应用前景广阔。     

财务哲学体系逻辑构建

财务哲学是从哲学层面上研究财务行为的主体与客体、要素与系统、矛盾与动力、肯定与否定、生成与发展等具有普遍性和终极性的世界观和方法论的学说。从范畴论、系统论、矛盾论、否定论和生成论等方面构建财务哲学逻辑体系,提升财务行为的哲学理念,发挥财务哲学的解析、批判、重构、制导、方法论等功能。     

UNIX系统的性能评价

本文综述了一般计算机系统性能评价的基本方法,讨论了用基准检测模拟(BenchMark Modeling)的方法对操作系统进行评价。针对 UNIX 操作系统写出了不同的基准检测模拟程序,给出了它们在不同机器不同 UNIX 版本上的运行结果。     

一个微机项目管理软件包(PMIS2)

本文首先介绍了项目信息管理软件在国内外的开发及应用情况。在分析国情的基础上提出了综合性项目信息系统的构成。讨论了一个在AM1092超级微机上完成的项目信息管理软件包PMIS2的构成和功能。对支持PMIS2的小型关系数据库REDBALex进行了分析。最后提供了几点在微机系统上开发信息系统软件的经验。     

变换的勒让德多项式用于线性延迟系统的分析和参数估计

本文根根Legendre多项式的基本性质,首先导出在任意区间上的积分运算矩阵和延迟运算矩阵,然后应用它求得线性延迟系统的近似解,进一步讨论延迟系统的参数估计。     

On the optimality of a class of minimal covering designs

It is shown that the minimal covering designs for v=6t+5 treatments in blocks of size 3 are optimal w.r.t. a large class of optimality criteria. This class of optimality criteria includes the well-known criteria of A-, D- and E-optimality. It is conjectured that these designs are also optimal w.r.t. other criteria suggested by Takeuchi (1961).