Multiple hierarchy risk assessment with hybrid model for safety enhancing of unmanned subscale BWB demonstrator flight test

To explore the low-speed characteristics of the Blended-Wing-Body (BWB) configuration for future civil aircraft, a series of unmanned subscale demonstrators have been developed and tested by our research team. During this process, specific safety risks deriving from uncertain design features, system unreliability, and insufficient personnel experience caused continuous flight test mishaps and the risk mechanism was not clear. Local and trial-and-error learning driven safety improvements took few effects on mishap prevention, so our focus was turned to look for systematic safety strategies. This paper establishes a systems theory based hybrid model to integrate the physical system reliability analysis techniques with the system dynamics method for illustrating the multiple risk interactions of the demonstrator flight test involving organizational, human resource and technical system factors. Using the prior BB-5 demonstrator as a case, the hybrid model simulation represents its historical risk evolution process, which verifies the model rationality. Derived risk control strategies reduced the mishap rate of a new demonstrator called BB-6 Sprit. The paper also shows the extended hybrid model can be applied on safety management of unmanned aerial vehicles from the initial period of vehicle development.     

隐喻构建过程的认知策略

隐喻无论在文体学还是西方文艺理论里都是重要的研究对象，然而，大多数人们研究隐喻还是停留在简单的修辞手法上，他们只是解决了隐喻的概念、隐喻的特点以及与其他修辞手法的异同，把隐喻当作一种静态的修辞手法对待，因此没有看到隐喻构建背后的认知策略，从而没有很好地把握隐喻的本质。本文把隐喻看作是动态的构建过程，从认知策略的视角加以探讨。     

关于航空工业科研政策与管理若干问题的思考

从科技与经济的结合入笔，探讨了航空工业科研技术创新社会条件的构造和完善，以及创新体制的建设、创新动力机制的建立等问题。     

Strategies and determinants for successful space technology transfer

The following paper reports the results of a research work carried from 2008 on the topic of strategies and determinants of space technology Transfer (TT). In particular, the aim of this study is to present: 1. The policies and strategies the major space agencies adopt for TT, 2. The operational mechanisms and determinants involved in the transfer of space technologies to other industrial sectors. To this extent we have conducted in the last five years: six case studies of large space agencies, four TT case studies concerning the construction of scientific satellites, two case studies focused on space to earth TT programs undertaken by the Japanese aerospace agency, and two TT case studies examining Italian space companies.The comparative and comprehensive analyses of these studies indicate that the space agencies of the more industrialized countries aim primarily at consolidating and developing the industrial systems in their own countries, which include the use of technology transfer programs, and that the transfer of space technologies follows the route “Earth–Space–Earth”. With regard to the determinants of the TT process, the most important of these correlate with the type of technology in transfer, whereas organizational, economic and financial determinants have less significance.     

高等职业教育发展品牌战略的思考

体现自身特色,强化品牌意识,实施品牌战略,抢占教育市场份额,是高职院校获得竞争优势的必由之路。通过教育品牌的重要性、办学理念和办学定位、特色教育及实施品牌战略等方面的论述,提出了塑造高职教育品牌的几个关键问题。     

军用软件可靠性策略研究

在分析影响军用软件可靠性因素的基础上，借鉴能力成熟度模型(CMM)过程规范思想，提出了一套完整的军用软件可靠性解决策略，包括软件可靠性组织过程、软件可靠性管理过程、软件可靠性工程过程和软件可靠性支持过程，并概要描述了各个过程所涉及的技术和实现方法。     

中国石油安全问题的战略思考

随着我国国民经济的快速发展，石油消费量的快速增长，对外石油依赖度将会日益提高。石油安全已成为我国国民经济安全和社会可持续发展所面临的重大战略问题。我们要统筹考虑制定符合中国国情的能源安全战略：建立安全稳定的国家石油储备机制；展开积极的资源外交；加强海上防务，确保运输安全；立足国情，科学指导，开源节能。     

客舱英文广播的现状及对策分析

国际民航组织规定英语是国际民航的专门用语。广播的正确性、传递信息的准确性是衡量广播质量高低的标准。目前中国民航客舱英语广播不尽人意,没有达到广播应有的效果。本文根据交际理论,对客舱英文广播的现状进行分析,同时提出相应的改进对策以提高客舱英文广播的质量,进而提高安全水平和服务质量。     

改进变异策略的自适应差分进化算法及其应用

针对标准差分进化(Differential Evolution,DE)算法存在控制参数难以选取以及变异策略缺乏稳健性的不足,提出一种基于改进变异策略的自适应DE算法.该方法用随机选取子种群的最优个体替代全种群最优个体进行变异操作;然后采用柯西分布和正态分布分别对收缩因子和交叉概率进行扰动,并在进化过程中利用胜出个体自适应地递推调整参数分布.对五个典型Benchmark函数的测试结果表明:该方法在全局搜索能力、收敛速度和精度以及可靠性上比标准DE算法都有了大幅度提高.将该方法用于分布式孔径雷达的方向图综合问题,通过较少的仿真次数即可稳定的获得更低的旁瓣电平.