The essential role of human spaceflight

The question is: should the United States and nations at large pursue a human spaceflight program (and if so, why)? I offer an unwavering positive answer to this question, and state the reasons for it while considering the broad challenges and benefits of (human) spaceflight. Space exploration is a human activity that is intrinsically forward-looking, and as such, has positive potential. Both national and international space programs can galvanize the population, inspire the youth, foster job-creation, and motivate the existing workforce. The nature of the enterprises involved—their scale, novelty, and complexity—requires a steady and continuous upward progression toward greater societal, scientific and technological development. That is, in order to overcome the challenges of human spaceflight, progress is required. More to the point, the survival of humanity depends on expanding beyond the confines of our planet. Human spaceflight, in short, presents us with an opportunity to significantly advance the nation and the global community.     

不提供加油服务高原机场运行控制研究

以中国国际航空公司＂邦达—拉萨＂和西藏航空公司＂拉萨—林芝＂航线为例,分析这类机场的运行特点,描述高原复杂机场的签派放行要求,梳理运行控制流程,旨在为高原复杂机场运行的安全、正点向签派员提供参考。     

民用航空发动机使用经济性研究

为了在发动机研制过程中进行直接使用成本分析,从设计中降低其直接使用成本,对民用发动机使用经济性进行了初步研究。从所有权成本、燃油成本和维修成本等方面分析了民用航空发动机直接使用成本的组成,分别给出了计算方法,并从这些组成的角度给出了提高发动机使用经济性的途径;在维修成本压缩空间最大的前提下,对发动机送修成本模型和送修策略制定方法进行了总结。     

我国民用飞机政策分析的CGE模型研究

研究民用飞机政策影响因素是国家制定相关政策的前提,同时也是民用飞机企业有效利用和规避现有政策的依据。针对民用飞机在研发、生产、销售、运营各阶段的相关宏观及产业政策,依据社会核算矩阵的框架,参考政策的作用路径,对已有的社会核算矩阵的部门进行拆分、合并,建立了用于民用飞机政策分析的描述性社会核算矩阵。在该社会核算矩阵的基础上,构造了用于民用飞机政策分析的CGE模型,并通过GAMS仿真验证了模型的可行性。模型的建立为今后分析我国政策对大飞机发展及运营的影响奠定了基础。     

2010年我国房地产业的政策导向与发展趋势

房地产业是我国国民经济发展的支柱产业,确保房地产业健康稳定发展不仅有助于我国抵御经济危机,而且是预防通胀的重要措施.在我国经济复苏这段时期内,国家将对房地产市场进行结构优化,包括支持保障性住房的发展、遏制投机行为、科学测算用地指标、严格规范土地储备、打击囤地行为等,以达到房地产市场和谐稳定发展的目标.     

The role of the European parliament in the development of a European union space policy

This paper investigates the role of the European Parliament (EP) in the development of the space policy of the EU (EUSP), an important policy area that has been neglected in the political science and EU studies literature. EUSP is the offspring of the European space policy which started as a purely intergovernmental affair, but gradually acquired a supranational dimension. Although the EP did little to initiate this process, it always supported the involvement of the EU in space, and it used both its formal and informal powers to affect and promote its development. Under the consultation procedure the EP managed to become a conditional agenda setter, and under co-decision an influential legislation maker. The changes it introduced in the European global navigation satellite and Earth observation programmes relate not only to the inter-institutional balance and its controlling powers, but to a series of substantive issues also. Consequently, the activism of the EP has played an important part in the development of the EUSP, even if it was not the main force behind its inception.     

高层建筑的防火安全对策

针对高层建筑的特点,分析了高层建筑发生火灾的危险性和危害性,对提高高层建筑消防安全需要进行全面系统设计,实施全方位科学运作,加强各方面综合协调,并对防范火灾发生,控制火灾扩大,确保安全疏散等问题进行了探讨。     

电子货币、货币创造与货币政策有效性

电子货币的产生与发展已经给传统的货币金融理论带来了极大的挑战.文章通过对引入电子货币的存款货币创造过程的实证分析,修正了传统存款乘数模型,并对新模型的政策含义赋予了新的解释,最后得出了几点启示性结论.     

刍议上市公司会计政策选择与会计信息披露

随着会计政策选择的空间不断增大，会计政策选择出现的问题越来越多。如何规范上市公司会计政策的选择，提高上市公司的信息披露质量成为人们探讨的一个重要内容。本文从我国上市公司会计政策选择的现状人手，进一步分析会计政策选择对信息披露的影响，对于促进上市公司合理选择会计政策、维护资本市场的健康运转有一定的借鉴意义。