航电仿真系统中RS422总线监控软件的设计

针对航电仿真系统总线监控软件专用性强的特点和重复开发多、欠缺标准开发流程的问题,为了提高航电仿真系统的开发效率,根据实际需求提出一种以RS422总线为数据传输通道的总线监控软件的设计方案。该方案采用分层开放式架构,结合面向对象与模块化设计思想,在一定限度内增强了软件的可扩展性与可重用性。在某型号航电仿真系统中的应用表明,以此方案设计的总线监控软件满足航电系统仿真的各项技术指标及用户需求能够有效辅助航电仿真系统的设计与开发。     

热处理对掺杂WO3的ITO薄膜性能的影响

用磁控溅射镀膜方法,制备掺杂WO3的ITO(xWO3-ITO)薄膜,经过热处理后对掺杂薄膜的表面形貌、吸收和透射光谱、面电阻等性能进行了测试.结果表明:适当的热处理能够提高xWO3-ITO薄膜在可见光范围内的透过率和在波长为228 nm处的吸光度.同时,该薄膜热处理后的方块电阻明显降低,导电性能得到明显提高.     

某型底排-火箭串联式复合增程弹发动机最佳点火时间研究

针对底排-火箭串联式复合增程弹火箭发动机点火时间进行外弹道优化研究,分析底排装置对火箭发动机工作特性的影响,研究火箭发动机不同点火时间对全弹射程的影响,确定火箭发动机的最佳点火时间.     

基于二维GIS数据和三维模型库快速构建营房土地三维模型的研究

营房土地三维可视化管理是实现营房土地信息化的重要手段,而营房土地三维模型的建立是实现三维可视化管理的前提.为提高营房土地管理水平和管理效率,提出了基于二维GIS数据和三维模型库的营房土地三维模型构建方法,解决了大范围、多区域数据采集和建模工作量大的难题,实现了数据的廉价采集和三维模型的快速构建,是实现营房土地三维可视化管理的有效途径.     

Annealing adaptive search,cross‐entropy,and stochastic approximation in global optimization

The Annealing Adaptive Search (AAS) algorithm for global optimization searches the solution space by sampling from a sequence of Boltzmann distributions. For a class of optimization problems, it has been shown that the complexity of AAS increases at most linearly in the problem dimension. However, despite its desirable property, sampling from a Boltzmann distribution at each iteration of the algorithm remains a practical challenge. Prior work to address this issue has focused on embedding Markov chain‐based sampling techniques within the AAS framework. In this article, based on ideas from the recent Cross‐Entropy method and Model Reference Adaptive Search, we propose an algorithm, called Model‐based Annealing Random Search (MARS), that complements prior work by sampling solutions from a sequence of surrogate distributions that iteratively approximate the target Boltzmann distributions. We establish a novel connection between MARS and the well‐known Stochastic Approximation method. By exploiting this connection, we prove the global convergence of MARS and characterize its asymptotic convergence rate behavior. Our empirical results indicate promising performance of the algorithm in comparison with some of the existing methods. © 2011 Wiley Periodicals, Inc. Naval Research Logistics, 2011     

改进合同网协议的Agent动态任务分配

针对导弹作战任务规划中的动态任务分配问题,研究了MAS框架下任务分配的形式化描述和数学模型,对动态任务分配的特点进行了分析,运用合同网理论,提出了基于改进合同网协议的Agent动态任务分配算法,实现了对不确定开放环境中动态变化的任务分配方法。算例表明算法是有效的。     

THE LONG‐RUN RELATIONSHIP BETWEEN DEFENCE EXPENDITURES AND GDP IN TAIWAN

Using the Solow–Swan growth model and the time‐trend included in the aggregate production function, this study applies the multivariate cointegration approach to re‐investigate the long‐run and causal relationships between defence expenditures and GDP while controlling for capital and labour input in Taiwan during the 1955–2002 period. It examines the long‐run causal relationship using the weak exogeneity test and utilizes general impulse response functions to determine whether a shock to defence expenditures affects economic growth or vice versa. Our findings provide substantive evidence in favour of the existence of a long‐run equilibrium cointegrated relationship between defence expenditures, GDP, labour and capital stock. The results of the weak exogeneity test indicate that a bi‐directional causal relationship exists in the long‐run between defence expenditures and GDP. Thus, the main policy implication that emerges from the long‐run results is that increasing defence expenditures in Taiwan is an effective means to boost overall economic performance and, with this improved economy, it should then be able to increase its defence expenditures further. Lastly, from our dynamic vector error correction model estimations, it is found that defence expenditures are a major means of adjusting for disequilibria that occur within the system.     

基于图熵法的战场抢救抢修方案复杂性量化模型

从战场抢救抢修注重时效的特点出发,提出了战场抢救抢修作业复杂性概念,分析了影响抢救抢修作业复杂性的因素．引入软件工程领域的图熵模型,从微观方面研究战场抢救抢修方案实施过程中的复杂性问题．将抢救抢修方案划分为3个层次,利用petri网对操作过程进行建模,并从中提取信息结构图和动作结构图．以作业的量化为基础,给出了方案的综合量化方法．实例证明该方法可以很好的反映抢救抢修方案的可操作性．     

武器装备论证多方案博弈分析方法

针对指标权重完全未知的非确定型武器装备论证多方案分析问题,提出一种基于博弈理论的多方案分析方法.该方法通过将多方案分析中的单个指标作为博弈的参与者,以综合评估所得的方案优先序与方案在某指标上取值的大小蕴含的方案优先序之间的相符度作为博弈方的收益,将指标的权重取值作为博弈方的策略,进而通过求解博弈的混合策略确定指标权重向量,最终得出多方案分析与评估结果.应用实例验证了该方法的有效性和实用性.     

平流层飞艇飞行模态分析

平流层飞艇的总体布局、升空原理和工作模式明显不同于导弹、飞机等传统飞行器,其动力学特性亦不同于上述飞行器,须深入研究其飞行动力学的基本特性、一般规律和内在机理。针对此问题,系统研究了平流层飞艇的飞行模态。采用小扰动方法推导了平流层飞艇的线性运动方程,将其解耦分组为纵向运动方程和横侧向运动方程;定义模态及模态参数,研究平流层飞艇的模态分析方法;通过计算分析状态方程的特征值和特征向量,研究了平流层飞艇的飞行模态。结果表明:纵向运动由浮沉、浪涌和摆动三种模态叠加而成,横侧向运动由偏航衰减、侧滑衰减和滚转振荡三种模态叠加而成。