考虑协同航路规划的多无人机任务分配

针对多无人机任务分配与协同航路规划问题,以分布式合同网拍卖算法为基础,构建无人机集群任务拍卖架构与拍卖收益函数,结合模拟退火算法协调任务执行次序,采用A^*算法完成两任务点间航程预估,在任务分配阶段同步完成多无人机间协同航路的初规划,确定最佳任务执行次序,实现任务分配与协同航路规划的紧耦合。仿真结果表明,在考虑禁飞区、障碍威胁情况下,该算法能够有效完成多架无人机不同类型任务的分配,且目标分配、执行次序合理,总执行代价小,各机间负载均衡;在任务分配阶段考虑协同航路规划具有明显的效果,能够有效提高任务分配的合理性。     

基于认知云的无人机群组信息对抗系统

基于认知云的无人机群组信息对抗系统由长航时、低成本的电子战无人机群组和云计算网络构成。侦察无人机负责有限范围内的信息侦收,云计算网络融合无人机群感知结果,生成广域信息态势,动态制定系统层对抗策略,调度攻击无人机实施电磁频谱压制或信息接入攻击,同时评估对抗效能,实现信息攻防闭环。无人机群组抵近工作,可显著降低载荷设计复杂度,实现小型化、低功耗与有效性的统一设计。     

基于 ABMS的无人机编队协同制空任务效能评估

无人机是海空作战的重要力量,制空作战是未来无人机的重要任务之一。为研究无人机编队协同制空作战的制胜机理,评估无人机编队协同制空作战效能:首先,对无人机编队协同制空任务进行分析,明确典型作战过程;然后,采用基于 Agent的建模与仿真(Agent-basedmodelingandsimulation,ABMS)方法,构建攻击型无人机、预警型无人机和空空导弹的 Agent模型,开展多无人机协同制空作战仿真和效能分析。结果表明,无人机探测距离、编队内攻击型无人机的数量,以及编队内有无预警型无人机,这些都将对作战效能产生重要影响,该结论可为无人机协同作战运用提供参考。     

高职院校实施工学结合人才培养模式面临的问题与对策

工学结合是高职教育改革与发展的方向,工学结合人才培养模式是高职教育的生命线。大力推进校企合作、创新实践工学结合人才培养模式的有效实施方案、探索适合高职院校发展的新思路,是实现高职院校服务社会需求的重要任务。本文分析了我国高等职业教育工学结合的现状及其影响因素,以西安航空职业技术学院为例构建了工学结合人才培养模式的运行体系,提出了实施工学结合的实践策略。     

基于态势感知一致性的UAV集群分布式协同性能分析

针对现有无人机集群分布式协同方法没有细致考虑态势感知过程,忽略了对抗环境下态势信息的不确定性对集群协同的影响,对协同性能缺乏量化分析等问题,提出基于态势感知一致性的无人机集群分布式协同方法,并分析协同性能。从集群协同作战角度分析协同方法的实质,考虑态势信息不确定性,给出集群态势感知一致性分析,建立态势觉察一致性、态势理解一致性等概念,并设计协同方法;建立协同时间、协同信息量等指标,分析指标特性,量化分析协同性能;在给定的仿真场景下,对比分析各协同方法性能。结果表明,所提方法协同性能较好,更切合对抗环境,对集群协同作战研究有一定的积极意义。     

T cell regulation in microgravity – The current knowledge from in vitro experiments conducted in space,parabolic flights and ground-based facilities

Dating back to the Apollo and Skylab missions, it has been reported that astronauts suffered from bacterial and viral infections during space flight or after returning to Earth. Blood analyses revealed strongly reduced capability of human lymphocytes to become active upon mitogenic stimulation. Since then, a large number of in vitro studies on human immune cells have been conducted in space, in parabolic flights, and in ground-based facilities. It became obvious that microgravity affects cell morphology and important cellular functions. Observed changes include cell proliferation, the cytoskeleton, signal transduction and gene expression. This review gives an overview of the current knowledge of T cell regulation under altered gravity conditions obtained by in vitro studies with special emphasis on the cell culture conditions used. We propose that future in vitro experiments should follow rigorous standardized cell culture conditions, which allows better comparison of the results obtained in different flight- and ground-based experiment platforms.     

基于直觉模糊优选动态规划的武器协同运用

将武器运用问题看作一个多阶段多指标的系统,对空战协同武器运用问题进行了分析研究.当作战指标值不能精确给出时,将直觉模糊优选理论与动态规划技术相结合,提出了一种基于直觉模糊优选动态规划.将各作战方案的指标值转化为一个模糊决策矩阵,得出各个作战方案的直觉模糊评价值.通过实例进行了仿真分析,结果表明,所提出的方法可以得到各个阶段的最优决策     

China’s Aviation Industry: a Global Partnership Strategy

This article discusses one of the main strategies which China has implemented to develop its competency in the aviation field. It is strategic for China to boost its aviation industry via international cooperation and several models of involvement into the global aviation value chain with leading aviation industries. As it is depicted as a strategy here, it is not necessary to say that a formal strong national strategy in encouraging exists. Actually, it is clearly a way China’s aero industry takes to develop its competency and business at the context it encounters. From an observer’s perspective, it is indeed a critical strategy. This article describes this strategy via the context, policies, program cases, as well as the evolution of the cooperation models in order to synthesize the strategy.     

构建我国石化企业核心竞争力的路径选择

加入WTO后，我国石化企业面临严峻的挑战。应加强核心竞争力战略研究，在国际竞争中培养成长能力，提升价值能力，发展独有技术。在战略重组和竞争合作中，转变发展方式，发挥优势，调整结构，缔造石化企业持续竞争优势。     

A selective space strategy for small countries

This article analyses the patterns and trends of small countries' participation in various forms of international space cooperation. The background to formulating a national space programme is discussed, together with considerations in linking national needs, stage of development, resources and capacity with those of the international community. The need for a selective national strategy on space activities is demonstrated: efforts must be concentrated around a few reasonably selected goals, provisions for acquiring information must be maintained, and the space programme must prepare the country for rapid development in all other fields of space research and applications, if world trends require. A brief examination of Bulgaria's space activity is made. A series of advanced space investigations have been undertaken in that country, and space technology transfer and spin-offs have resulted, with valuable benefits for the society and the economy.