世界一流航天发射中心发展对策探究

“发展航天事业,建设航天强国是我们不懈追求的航天梦” ,建设实力雄厚、现代化、技术一流的航天发射中心,不断推进航天强国战略发展步伐。本文辨析了世界一流航天发射中心的概念和所具备的特征,并从先天优势、发展实力、组织管理等方面分析了航天发射中心发展的内在要求,提出了现役航天发射中心转型发展对策,为航天强国建设提供理论支撑。     

Evolutionary determinants of war

This paper considers evolutionarily stable decisions about whether to initiate violent conflict rather than accepting a peaceful sharing outcome. Focusing on small sets of players such as countries in a geographically confined area, we use the concept of evolutionary stability in finite populations. We find that players’ evolutionarily stable preferences widen the range of peaceful resource allocations that are rejected in favor of violent conflict, compared to the Nash equilibrium outcomes. Relative advantages in fighting strength are reflected in the equilibrium set of peaceful resource allocations.     

Deterrence of nuclear terrorism in the context of South Asia

Stability among the great powers during the Cold War is widely theorized in terms of nuclear deterrence. Rationality of States and their preference for survival are the basis of nuclear deterrence. The rationality of non-state terrorist groups is different from that of nation-states. Even though they are also rational actors with their own hierarchy of preferences, survival may not be their ultimate goal. Deterrence of nuclear terrorism is therefore different from deterrence against states. South Asia is more vulnerable to nuclear terrorism than any other region of the world for many reasons. This article analyzes the possibility of nuclear terrorism and the ways of deterrence against it in the context of South Asia.     

引入电流变化率的电源分布网络最差噪声分析算法

随着时钟频率的增加以及电源电压的降低,电源完整性问题日益凸显。将电流变化率加入到最差噪声算法的电流约束中,能够在任意电流变化率的情况下分析电源分布网络的最差噪声,从而获得更加真实的最差噪声。另外,利用改进的Knuth-Yao四边形不等式法对基于动态规划的最差噪声算法进行加速,加速后算法的时间复杂度从O(n~2m)降为O(mnlogn)。     

A Reversal of Fortunes? Extended Deterrence and Assurance in Europe and East Asia1

ABSTRACT

The extended deterrence relationships between the United States and its allies in Europe and East Asia have been critical to regional and global security and stability, as well as to nonproliferation efforts, since the late 1950s. These relationships developed in different regional contexts, and reflect differing cultural, political and military realities in the US allies and their relations with the United States. Although extended deterrence and assurance relations have very different histories, and have to some extent been controversial through the years, there has been a rethinking of these relations in recent years. Many Europeans face a diminished threat situation as well as economic and political pressures on the maintenance of extended deterrence, and are looking at the East Asian relationships, which do not involve forward deployed forces as more attractive than NATO’s risk-and-burden-sharing concepts involving the US nuclear forces deployed in Europe. On the other hand, the East Asian allies are looking favorably at NATO nuclear consultations, and in the case of South Korea, renewed US nuclear deployments (which were ended in 1991), to meet increased security concerns posed by a nuclear North Korea and more assertive China. This paper explores the history of current relationships and the changes that have led the allies to view those of others as more suitable for meeting their current needs.     

An integral equation for the second moment function of a geometric process and its numerical solution

In this article, an integral equation satisfied by the second moment function M₂(t) of a geometric process is obtained. The numerical method based on the trapezoidal integration rule proposed by Tang and Lam for the geometric function M(t) is adapted to solve this integral equation. To illustrate the numerical method, the first interarrival time is assumed to be one of four common lifetime distributions, namely, exponential, gamma, Weibull, and lognormal. In addition to this method, a power series expansion is derived using the integral equation for the second moment function M₂(t), when the first interarrival time has an exponential distribution.     

数字化部队战斗力优化组合模型

数字化部队在战场上的出现,是信息战争产生的重要标志之一.随着信息技术的兴起,一些西方国家组建了数字化部队并加深了对其编成和结构理论的研究.首先介绍了模块理论,通过对数字化部队战斗力原理的分析,讨论了数字化部(分)队战斗力构成要素.在此基础上,使用线性规划理论试探性的构建出数字化部(分)队战斗力模块组合模型,并对模型的不同组合方式进行了论证和分析,得出数字化部(分)队战斗力模块的一种优化组合.最后展望了本课题下一步工作的研究重点.     

舰船主动力装置系统可靠性的模糊预计

利用模糊数学理论中的综合评判方法,综合考虑多方面的模糊因素,借助于已知单元的可靠性预计舰船主动力装置系统中其它单元的可靠性,进而预计系统的可靠性．     

核动力装置控制系统神经网络故障诊断

研究了如何将先进的人工神经网络的方法应用到核动力控制系统故障诊断中,并对这种方法的原理、优缺点、可行性等进行了分析,提出了针对核动力装置控制系统的设计方案.     

一种新的活塞式磁通压缩发电机设计方案

介绍了磁通压缩发电机 (MFCG)作为高功率脉冲电源的特性 ,针对国外MFCG方案中遇到的烧蚀问题 ,提出了一种活塞式双螺旋绕组MFCG的新设计方案 ,给出了该方案的设计结构 ,分析了该种方案的原理、工作过程及特点