直升机MSG-3区域分析方法研究

以某民用直升机MSG-3区域分析为例,阐述和分析了直升机MSG-3区域分析的工作流程、等级系数确定原则、标准区域分析和增强区域分析方法,为今后直升机MSG-3区域分析提供参考.     

电弧加热射流O2激光诱导荧光技术温度测量

采用ArF准分子激光器作为激发光源来激励O2-Schumann-Runge带系(B3Σ-u←X3Σ-g)193.3nm附近的转动吸收谱线,用紫外光电倍增管探测该带系256nm附近的荧光信号,建立了ArF准分子激光器O2激光诱导荧光流场测试系统.在建立O2单带测温模型和软件的基础上,利用Schumann-Runge带系(10,2)带的荧光信号、测量了氧氩混合电弧加热射流的径向温度分布.结果表明我们建立的ArF准分子激光器O2-LIF测试系统是成功的.     

弹射座椅某新型射伞机构工艺设计研究

本文对火箭弹射座椅某新型射伞机构机械加工、装配及涉及的粘接、剪切试验、强度试验等主要因素进行了工艺分析;对加工制造过程工艺方案设计、试验方法、夹具制作及注意事项进行深入探索,对于该产品的工艺流程设计、质量控制及生产具有一定指导、应用意义。     

民用支线飞机的军用潜力分析

由于技术发展和现实需求两方面的原因,民用支线飞机的军用潜力日益受到世界各国的重视。首先简要分析了世界范围内支线飞机市场开拓受限以及各国军方对支线飞机平台提出需求的相关情况,然后从载机平台和任务设备两方面对支线飞机改型发展军用飞机的可行性进行了研究,最后对国外支线飞机的军用改型发展近况做了概括分析。     

高校工会履行教育职能的对策探究

教育是高校工会组织的一项重要社会职能。从实施高校工会教育职能重要性和必要性入手，分析高校工会教育职能的实施现状及其原因，探讨研究高校工会教育内容的模式，提出方法、对策。     

英语写作元认知能力培养

为了解决英语写作教学费时低效的问题,根据元认知理论框架对54名高职高专商务英语专业二年级的学生进行了行动研究。研究方法包括收集相关材料、制订并实施改进写作教学的行动计划、评估计划实施的效果。结果是绝大部分学生对本学期的写作教学和在写作方面取得的成绩表示满意。最后对研究过程和结果作分析,针对不足之处提出了改进办法,并提出了有待研究的新问题。     

The Zadko telescope: A resource for science education enrichment

This paper describes plans for employing a new fully robotic optical telescope in Western Australia, the Zadko telescope, for evaluating education-outreach. A key feature of the telescope is the optimized observation-scheduling program, developed by our French collaborators who operate the TAROT robotic telescope network. It provides a simple interface for requesting observation time remotely, and has the potential for school students to participate in real astronomical research. The University of Western Australia and Curtin University are commencing a study for evaluating changes in student perceptions of science by participation in our astronomy research. Other areas of interest include broadening the program to include access of students from European countries, and exploring how remote access astronomy can be used to encourage awareness between different cultures.     

Improvements in the re-flight of spaceflight experiments on plant tropisms

In order to effectively study phototropism, the directed growth in response to light, we performed a series of experiments in microgravity to better understand light response without the “complications” of a 1-g stimulus. These experiments were named TROPI (for tropisms) and were performed on the European Modular Cultivation System (EMCS), a laboratory facility on the International Space Station (ISS). TROPI-1 was performed in 2006, and while it was a successful experiment, there were a number of technical difficulties. We had the opportunity to perform TROPI-2 in 2010 and were able to optimize experimental conditions as well as to extend the studies of phototropism to fractional gravity created by the EMCS centrifuge. This paper focuses on how the technical improvements in TROPI-2 allowed for a better experiment with increased scientific return. Major modifications in TROPI-2 compared to TROPI-1 included the use of spaceflight hardware that was off-gassed for a longer period and reduced seed storage (less than 2 months) in hardware. These changes resulted in increased seed germination and more vigorous growth of seedlings. While phototropism in response to red illumination was observed in hypocotyls of seedlings grown in microgravity during TROPI-1, there was a greater magnitude of red-light-based phototropic curvature in TROPI-2. Direct downlinking of digital images from the ISS in TROPI-2, rather than the use of analog tapes in TROPI-1, resulted in better quality images and simplified data analyses. In TROPI-2, improved cryo-procedures and the use of the GLACIER freezer during transport of samples back to Earth maintained the low temperature necessary to obtain good-quality RNA required for use in gene profiling studies.     

复合式直升机技术发展分析

首先根据旋翼技术的特点和复合推进方式的不同,将复合式直升机分成5个类别,分别对5类复合式直升机的发展历程做了扼要介绍。然后,通过技术成熟度与市场需求的发展分析,将复合式直升机的发展归纳为5个阶段,总结了国外复合式直升机的型号发展过程和规律。最后,结合国外发展复合直升机的经验,以及中国直升机技术水平、科研机制的特点,针对中国复合式直升机技术发展提出了一些建议。     

螺旋管成形模具的CAD/CAM方法研究

针对螺旋管成形模具的特点,采用Pro/Engineer进行三维实体设计、PowerMILL进行数控编程的设计制造方法,充分发挥Pro/Engineer三维实体的参数化设计和PowerMILL刀具路径轨迹优化的优势,缩短了螺旋管成形模具的设计制造周期,提高了螺旋管成形模具的加工精度。