Research on system-of-systems combat simulation model formal specification and representation

1. INTRODUCTION Weapon equipments acquisition and demonstration has become more and more prominent in the informationalized war conditions while operational effectiveness evaluation is its core part. The compl- exity and uncertainty of weapon systems operational effectiveness evaluation make traditional analysis methods or expert evaluation methods less effective to solve problems. Simulation based operational effe- ctiveness evaluation is an efficient solution. The increased complexity o…     

环境系统的临界性分析

讨论了环境系统临界性产生的一种可能机制及其临界特征.对湖泊富营养化模型的详细分析表明,其临界性来自于湖泊系统中的\"S\"形磷再循环过程.基于\"S\"形过程的普遍性,文章认为这可能是产生环境系统临界性的一种普遍机制,并建立了其动力学模型的一般形式.以此为基础,构造了一个包含\"S\"形过程的生物自净模型,该模型可以刻画因生物的污染净化能力变化所引起的临界性.对生物自净模型动态演化过程的数值模拟发现,其临界特征在污染治理中有重要意义,如果污染治理时刻晚于某个临界值,环境系统的演化轨迹将突然发生变化.     

Relationship between topology and functions in metabolic network evolution

What is the relationship between the topological connections among enzymes and their functions during metabolic network evolution? Does this relationship show similarity among closely related organisms? Here we investigated the relationship between enzyme connectivity and functions in metabolic networks of chloroplast and its endosymbiotic ancestor, cyanobacteria (Synechococcus sp. WH8102). Also several other species, including E. coli, Arabidopsis thaliana and Cyanidioschyzon merolae, were used for the comparison. We found that the average connectivity among different functional pathways and enzyme classifications (EC) was different in all the species examined. However, the average connectivity of enzymes in the same functional classification was quite similar between chloroplast and one representative of cyanobacteria, syw. In addition, the enzymes in the highly conserved modules between chloroplast and syw, such as amino acid metabolism, were highly connected compared with other modules. We also discovered that the isozymes of chloroplast and syw often had higher connectivity, corresponded to primary metabolism and also existed in conserved module. In conclusion, despite the drastic re-organization of metabolism in chloroplast during endosymbiosis, the relationship between network topology and functions is very similar between chloroplast and its precursor cyanobacteria, which demonstrates that the relationship may be used as an indicator of the closeness in evolution.     

基于深度学习的输变电设备紫外放电光斑分割方法

随着紫外成像技术的发展,高压电力设备对于紫外成像图谱的量化分析提出了更高的要求。紫外图谱的量化分析需要用到除紫外成像仪所输出“光子数”额外的紫外光斑图像信息,所以需要将紫外放电光斑从可见光的背景中分割出来。然而,传统紫外图谱光斑分割方法仍存在复杂背景及小光斑分离困难、特征选取复杂、分割精准度低等问题。基于上述问题,提出了一种基于深度学习的紫外图谱光斑分割提取的方法。首先,采用紫外成像仪拍摄电力设备放电缺陷紫外图谱;其次,分别构建FCN-32s、FCN-16s、FCN-8s 3种全卷积网络(fully convolutional networks, FCN)子模型架构,并利用随机梯度下降法进行模型训练;最后,实现输变电设备放电缺陷紫外图谱主光斑的自主分割提取。经过对FCN 3种子模型架构的训练、测试和对比分析,结果表明：FCN-16s模型为紫外光斑分割提取的最佳模型,测试准确率可达99.34%。结果表明基于深度学习的紫外图谱光斑分割方法准确高效,为紫外光斑的量化提取及电力设备放电缺陷的紫外诊断提供了参考。     

均衡函数及其在变权综合中的应用

进一步研究了均衡函数,改进了［４］中公理化体系,获得了两大数均衡函数及相应的变权模式并分析了这些模式之间的关系。     

我国无线寻呼市场研究

无线寻呼作为传递信息的新型工具,十年来用户呈跳跃式,超常规发展,通过抽样调查设计与实施,得到断面数据,运用模糊数量化理论Ⅰ进行需求预测,运用聚类理论进行市场细分,得出有重要价值的结论,可为无线寻呼所占用的频谱资源管理制定相应法律法规提供科学依据,所得结果对其它行业的市场研究也有重要的参考价值。     

产业结构地区分类方法及应用

为了把各地区按产业结构的相似程度进行分类,以确定相应的经济区域,本文采用了地区间产业结构的相似程度指标构造相似关系矩阵,然后把它转化为对称的０－１矩阵。最后通过运用对称的０－１矩阵的性质,把地区按产业结构的相似性分成若干类。应用实例说明,这种分类方法是可行的和有用的。     

基于VRPTW-AT模型的钢包优化调度方法

在炼钢-连铸生产过程中,钢包的优化调度对减少钢铁生产的热能消耗,提高生产效率具有重要作用.将钢包调度问题归结为任务带有时间窗、车辆带有调整时间的车辆路径问题(vehicle routing problem with time windowsand adjustment time,VRPTW-AT).根据钢包服务钢水过程的约束建立了钢包调度问题的数学模型,针对模型特点提出了分散搜索(scatter search,SS)算法.基于国内某钢铁企业生产实绩做测试案例,对SS算法的优化效果与钢厂生产的实际数据进行了对比分析,实验结果表明了模型和算法的有效性.     

资源约束的拼件维修模型与粒子群求解算法

为了获得最优的装备作战单元的拼件维修方案与任务分配方案, 建立了一种同时优化拼件维修方案与任务分配方案的非线性规划模型, 模型中同时考虑了不同任务对武器系统的具体需求、武器系统的客观情况、维修资源约束, 可以最大化地协调任务、装备群与维修资源之间的矛盾, 所以更加贴合实际. 设计了基于粒子群算法的求解算法, 包括算法框架、粒子的表示、初始化、适应度函数、更新方法等. 最后, 应用该粒子群算法对具体实例进行了求解, 分析表明模型与算法可以有效地优化任务分配方案与拼件维修方案, 提高装备作战单元任务成功概率, 为决策者制定决策提供指导.