国有三大航空公司航油套期保值问题研究

采用案例分析方法,对国内航空公司航油套期保值问题进行全方位的研究。研究发现国有三大航空公司航油套期保值出现巨额亏损共性原因是：低估风险,投机趋利;航油套期保值知识掌握不够．交易原则不熟悉、操作技能欠缺,没有及时止损;过量进行航油套期保值,加剧风险;风险控制意识的薄弱,风险管理机制不健全：建议国内航空公司实施航油套期保值策略,加快专业专业人才培养,确定合理航油套期保值比例,以避险为目的,以锁定航油成本为目标,最终实现避险趋利。     

“语”“文”并行：大学语文教学内容改革初探

结合目前大学语文的教学现状,以理工科院校的学生为研究对象,针对学生在大学语文教学中出现的问题提出＂语＂和＂文＂并行的现实意义和教学设想,即完善大学语文教学体系,咬合静态知识与动态知识,完成＂语码——交际＂的有效转换。     

多机空战指挥引导不平衡目标分配方法研究

目前,存在多机空战指挥引导不平衡目标分配模型少的问题,提出一种新的多机空战不平衡目标分配方法。结合空战理论与实际,在现有模型的基础上,利用最优控制理论,建立多机空战指挥引导目标分配模型;介绍匈牙利算法和进化匈牙利算法的基本思想和流程,在此基础上将匈牙利算法和进化匈牙利算法相结合来寻求最优方案,并进行仿真分析。结果表明:该方法具有较好的时效性和可靠性,能满足多维条件下的目标分配处理,满足实战需求,为解决多机空战指挥引导不平衡目标分配问题拓展了研究思路。     

影响天文导航系统定位精度的两个因素分析

本文的目的是研究影响天文导航系统定位精度的两个因素–时间和重力矢量方向。首先对影响天文导航系统定位精度的两个因素进行了理论分析并首次给出了理论公式,然后通过计算机仿真试验分析了两个因素对天文导航系统定位精度的影响程度。最后给出了对工程实践具有指导意义的结论。
     

人际关系与心理卫生

人的社会性决定了人必须生活于广泛的人际关系网中,从中获得物质需要和精神需要。人际关系的广泛性和复杂性,对人的心理健康产生了深刻而持久的影响。“人类的心理适应,最主要的就是对于人际关系的适应,所以人类的心理病态,主要是由于人际关系的失调而来。”人际关系问题是心理卫生学研究和实践的重要课题之一。     

基于有限元分析方法的某惯性台体结构优化设计

建立惯导系统中惯性组件结构三维模型,利用有限元分析软件对惯性组件结构进行有限元模态计算和分析。根据模态分析结果,对惯性台体结构进行拓扑优化,达到惯性台体减重的目的,优化后的惯性台体结构满足文中提出的设计要求。此结构优化设计方法简单,易于实现,对优化惯导系统结构设计,实现小型化、轻量化目标具有一定的指导意义。     

直线度平面度测量平差的研究

为了减小节距法测量直线度和平面度时原始数据的不确定性误差 ,采用最小二乘平差理论解决了直线度测量平差的理论问题 ,并对平面度测量平差的方案进行了对比分析。通过大量实验验证了平差方法的有效性。对平直度测量标准的制定以及提高工程检测准确度有实际应用意义。     

Update on Fengyun Meteorological Satellite Program and Development

China began to develop its meteorological satellite program since 1969. With 50-years' growing, there are 17 Fengyun (FY) meteorological satellites launched successfully. At present, seven of them are in orbit to provide the operational service, including three polar orbiting meteorological satellites and four geostationary meteorological satellites. Since last COSPAR report, no new Fengyun satellite has been launched. The information of the on-orbit FY-2 series, FY-3 series, and FY-4 series has been updated. FY-3D and FY-2H satellites accomplished the commission test and transitioned into operation in 2018. FY-2E satellite completed its service to decommission in 2019. The web-based users and Direct Broadcasting (DB) users keep growing worldwide to require the Fengyun satellite data and products. A new Mobile Application Service has been launched to Fengyun users based on the cloud technology in 2018. In this report, the international and regional co-operations to facilitate the Fengyun user community have been addressed especially. To strengthen the data service in the Belt and Road countries, the Emergency Support Mechanism of Fengyun satellite (FY_ESM) has been established since 2018. Meanwhile, a Recalibrating 30-years' archived Fengyun satellite data project has been founded since 2018. This project targets to generate the Fundamental Climate Data Record (FCDR) as a space agency response to the Global Climate Observation System (GCOS). At last, the future Fengyun program up to 2025 has been introduced as well.     

Progress of Space Medicine Research in China

With the approaching of the Chinese Space Station (CSS) era, the focus of space medicine applications and related research has shifted to addressing the astronauts' health support in long-duration spaceflights, including nutrition, countermeasure against the physiological effects of weightlessness, medical monitoring and support, psychology status, etc., and accordingly the human experiments to simulate long-duration weightlessness have been carried out. Increasingly, basic research has been put forward in the key areas, such as space bone loss, cardiovascular dysfunction and the molecular mechanisms underlying radiobiological effects. Moreover, specific novel research fields, such as hypometabolism technology, were explored. The research projects in the field of space medicine experiment, as an important aspect of the Chinese Space Station's application, have been officially approved and launched.     

马克思主义中国化的动力延缓机制及结构要素

马克思主义中国化动力延缓机制总的来说指的就是那些主观上为了积极推进而客观上却延缓了马克思主义中国化历史进程的各种动力构造要素的有机组合;教条主义、经验主义和宗派主义都是马克思主义中国化动力延缓机制的结构要素,它们就其实质来说就是学风、实践片面化以及党风问题。