面向卫星的在轨服务任务规划方法

针对空间在轨服务日趋成熟以及在轨服务现实需求增长的背景,以在轨服务航天器为研究对象,研究面向卫星的在轨服务任务规划问题,探讨如何合理安排与调配在轨服务资源。将问题分解为在轨服务资源分配和在轨服务路径规划两层,并建立双层优化数学模型。设计在轨服务任务规划算法求解问题,包括基于多种群并行进化的混沌遗传算法和基于全局坐标转换的NSGA-Ⅱ+GSDE算法,并通过仿真结果对比分析,验证算法的可行性和有效性。     

From first to third stream activities in higher education: the case of the Spanish Defence University centre

The paper adds to the debate on the relationship between military spending and economic growth by analysing the contribution of a military university centre to regional economic development. It goes beyond traditional economic impact studies by including research related effects and integrating “third stream” activities. Conceptualization and categorization are carried out to thoroughly analyse the different dimensions of knowledge and “third stream” actions. The analysis is performed from its settlement and during its first 5 years of existence which allows showing how the strategy of community engagement is developed. The conclusion suggests that, as traditional military roles extend, and military education institutions become higher education institutions, a comprehensive evaluation should be taken into account to enrich the public debate on government spending.     

Regional mediation strategy: The case of Zimbabwe

The growth and survival of the field of conflict resolution can only be attained if practice is used to generate theory, rather than a reliance on the current situation where theory attempts to direct practice. Some conflict resolution practitioners believe that theory and practice cannot be separated. This article evaluates the art of mediation using Zimbabwe as a case study, where the strategy was used in an attempt to resolve the Zimbabwean conflict that began in 1999. Employing primary and secondary sources, the article delineates the major characteristics of mediation and clarifies principles of the strategy. It further establishes the affinity and dissonance between practice and theory. In addition, it asserts that in the Zimbabwean case, the achievements of insider-partial mediation as a strategy were limited. In the long term the mediation strategy failed because the Government of National Unity did not fulfil all the outstanding issues enunciated by the global political agreement as a precursor to free and fair, credible and legitimate elections. In opposition to the mediation targets towards sustainable peace, Zimbabwe witnessed rushed elections before the accomplishment of the issues at stake, leading to the overall failure of the insider-partial mediation.     

基于A~*算法的虚拟士兵城市作战路径规划

针对虚拟士兵在城市作战仿真领域的需求,重点研究了虚拟士兵在城市环境中路径规划问题。通过对三维城市虚拟环境空间进行分层信息处理,生成虚拟士兵能够感知的虚拟信息层。用A*算法求出虚拟士兵从初始位置到达目标位置的最佳路径,并给出算法的具体设计与实现。     

Approximation algorithms for general one‐warehouse multi‐retailer systems

Logistical planning problems are complicated in practice because planners have to deal with the challenges of demand planning and supply replenishment, while taking into account the issues of (i) inventory perishability and storage charges, (ii) management of backlog and/or lost sales, and (iii) cost saving opportunities due to economies of scale in order replenishment and transportation. It is therefore not surprising that many logistical planning problems are computationally difficult, and finding a good solution to these problems necessitates the development of many ad hoc algorithmic procedures to address various features of the planning problems. In this article, we identify simple conditions and structural properties associated with these logistical planning problems in which the warehouse is managed as a cross‐docking facility. Despite the nonlinear cost structures in the problems, we show that a solution that is within ε‐optimality can be obtained by solving a related piece‐wise linear concave cost multi‐commodity network flow problem. An immediate consequence of this result is that certain classes of logistical planning problems can be approximated by a factor of (1 + ε) in polynomial time. This significantly improves upon the results found in literature for these classes of problems. We also show that the piece‐wise linear concave cost network flow problem can be approximated to within a logarithmic factor via a large scale linear programming relaxation. We use polymatroidal constraints to capture the piece‐wise concavity feature of the cost functions. This gives rise to a unified and generic LP‐based approach for a large class of complicated logistical planning problems. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2009     

基于二层遗传算法的导弹航路选优问题研究

在多批次多数量的反舰导弹从多个方向对敌舰艇进行饱和攻击的决策过程中，如何选择出最优的航路组合是提高反舰导弹作战效能的关键问题。在综合分析反舰导弹航路选优问题的基础上，建立了导弹航路选择的优化模型，并针对导弹航路选优问题，对基本遗传算法进行了改进，提出了二层遗传算法。仿真分析了多火力单元多目标导弹攻击的航路组合优化问题，得出了有效的导弹攻击航路。通过验证，说明了二层遗传算法在导弹航路规划中的有效性。     

用Excel演示Floyd算法

Floyd算法是计算最短路径长度的基本算法之一,若用Excel实现,算法的核心部分只需填写一个公式,比通常的四重循环结构算法简单、直观。     

一类具有标准发生率的SI型传染病模型的全局稳定性

研究如下一类具有标准发生率的SI型传染病模型{ds/dt=rS（1-（S＋I）/K-β SI/（S＋I）, dI/dt=βSI/（S＋I）-dI。应用微分方程定性理论，给出了该系统地方病平衡点、无病平衡点和总人口消亡平衡点的全局渐近稳定的充分条件。     

隐身飞机突防建模及低可探测性轨迹规划

针对隐身飞机突防飞行规划,分析了隐身飞机对警戒雷达网突防过程问题特性,建立了雷达探测模型与组网警戒雷达信息融合模型;综合考虑隐身飞机的隐身能力、预警时间和燃料消耗将隐身飞机低可探测性轨迹规划问题形式化为一个复杂多目标非线性连续时间最优控制问题;并提出基于伪谱法的低可探测性轨迹规划方法。仿真实验实现了在组网警戒雷达下隐身飞机的低可探测性突防轨迹规划,证明了方法的可用性和有效性。     

深入学习贯彻习主席重要论述 全面推进军队院校军事理论研究创新发展【将军论坛】

科学的军事理论就是战斗力。在新起点上全面推进军队院校军事理论研究创新发展，必须深入学习贯彻习主席关于军事理论创新的重要论述，着力提高站位、谋篇布局、形成拳头，进一步加强标准统筹、导向统筹、力量统筹和机制统筹，努力为强军兴军实践提供科学理论支撑。