REGIONAL PERSPECTIVES ON LOW NUCLEAR NUMBERS

President Barack Obama has outlined a course toward lower numbers of US nuclear weapons. Much attention has been paid to the US-Russian context, where deterrence is believed to be basically stable and conditions ripe for gradually reducing arsenals on both sides. But considerably less attention has been paid to the possible implications of lower nuclear numbers on other regions of the world and the reactions of both adversaries and US allies. If nuclear reductions are to be stabilizing and beneficial to security, reassurance and strengthened nonproliferation efforts in various regions need to accompany nuclear cuts. But the specific problems and remedies across regions vary. This article summarizes the results of a multi-author study. It concludes that regions with US allies and formal extended deterrence pledges may pose more vexing problems than those areas of the world without such close allies or commitments.     

THE UNITED NATIONS SECURITY COUNCIL AND THE ORGANISATION OF AFRICAN UNITY

The UN relies on regional organisations to carry out peacekeeping activities and has very good reasons for doing so: resource constraints and relevant political influence. In Africa, however, the UN Security Council seems unwilling to take decisive action when faced with complex emergencies and leaves the burden to the OAU which has its own problems. The UN charter does allow regional organisations to take enforcement action even without prior armed attack. The OAU charter converges with that of the UN in ways that should make cooperation easier than it has been. Despite the rhetoric, the UN Security Council has undertaken very little visible action in Africa when it is most needed. A lack of significant African representation in the Council is perhaps a cause. The Council will improve its global authority if it undertakes reforms that reduce the power of the US and the UK over its decisions.     

基于状态空间模型的故障诊断方法

应用现代控制理论,提出了一种基于状态空间模型的故障检测和诊断方法,即通过设计故障检测器来进行系统的故障检测和诊断,并通过实例证明了该方法的有效性和实用性。     

引信保险机构状态信号的提取与处理

根据引信保险机构系统特性分析,选择驻极体传声器作传感器,从而获得引信保险机构的状态信号。经多级高、低通滤波和放大后,由单片机和标准判据进行比较,完成引信保险机构的状态检测。     

复杂设备诊断与维修中基于改进最近相邻法和线索的案例检索

基于案例推理系统的强大功能,来源于它能够从案例库中迅速地检索到与当前新问题“相似”的案例,而这种相似性的比较主要依赖于如何建立问题的特征索引。结合目前三种主要的案例索引技术：最近相邻法（Nearest－neighbor）、归纳法和知识索引法,提出了改进最近相邻法的案例索引技术;并以设备故障诊断与维修为背景,给出了一种基于改进最近相邻法的线索推理算法。     

战场损伤评估与修复分析及应用

本文根据我国国情和我军实践,论述了武器装备战场损伤评估与修复(BDAR)的基本概念、原理、分析程序及方法,提出了进行BDAR分析、制定HDAR大纲等一系列实际应用问题。     

论表面工程及其发展

本文阐述了表面工程的内容、形成及其作用,并探讨了表面工程学科体系和今后的发展方向.     

软件维护性度量和评价研究

分析了软件维护性度量的若干定性定量方法 ,介绍了用于软件维护性评价的技术和工具 ,指出了软件维护性度量和评价的进一步研究方向 ,对于提高软件的维护性具有一定的理论和工程意义。     

旋转稳定塑料弹体工程设计计算研究

本文以实验结果为依据,首先分析了塑料弹体影响弹丸膛内运动的物理性能,然后结合旋转弹丸的膛内运动特征,经过模拟试验,采用数学拟合法,初步建立旋转稳定弹塑料弹体工程设计计算的数学模型(包括结构尺寸设计计算、强度计算和内弹道计算)。