某光电检测仪典型问题分析及解决

某光电检测仪器用于实时精确检测设备的动态安装方位准确度。就该仪器使用过程中出现的光能量分布不均、二次像点现象严重及测角零位漂移等几个典型问题进行分析,提出并采取了相应的解决措施,为以后解决类似的问题提供了技术途径。     

基于模糊控制的空气悬架模型建立

空气悬架以其优良的减振性能，在汽车振动控制中得到越来越广泛的应用。本文以空气悬架为研究对象，构建了带附加空气室空气悬架系统的1／4车辆振动模型；分析了空气悬架刚度调节原理和控制特性，本文采用了不依赖于被控对象精确数学模型的模糊控制策略进行空气悬架控制器的设计。     

Infrared radiation characteristics of a hypersonic vehicle under time-varying angles of attack

Hypersonic vehicles emit strong infrared(IR) radiation signatures that can be treated as a detecting source for object identification and routine diagnosis. This paper is aimed at examining the intrinsic radiation characteristics of a Boost-Glide Vehicle(BGV) under the condition of various Angles of Attack(AOAs). A two-temperature model considering the thermal and chemical nonequilibrium effects is coupled with Navier-Stokes equations solved by the finite volume technique.A gas–solid conjunction heat transfer model is also added into the fluid solver to simulate the surface temperature of the vehicle. The radiative transfer equation is solved with Line of Sight(LOS)algorithm. The computational results for a Hypersonic Technology Vehicle-2(HTV-2) type vehicle show that radiances of the vehicle are strongly dependent on the surface temperature. The presence of AOA results in the significant difference of the surface temperature. Infrared radiation characteristics are also changed in intensity and spectral band due to the AOA. Simulations are performed with two time-varying AOAs. Transient results indicate that the variation of AOA does have a great effect on the infrared radiance and is closely related to observation angle, spectral band, angle size,angular velocity and time history.     

复合加强型推进剂包装容器设计与验证

提出了一种适合肼类推进剂航空运输的复合加强型推进剂包装容器设计,包装容器采用多层复合结构,满足了高结构强度、轻量化、有效隔热、泄漏应急处理等要求。开展了跌落试验和火焰灼烧试验,结果表明,包装容器可用于少量液体推进剂的包装防护,可有效提高对泄漏、跌落、灼烧等危险因素的防护能力,提高了液体推进剂在贮存和运输过程中的安全性和可靠性,满足危险品航空运输安全要求。     

A study on cycle slip detection and correction in case of ionospheric scintillation

This research is aiming for cycle slip detection and correction in case of ionospheric scintillation. Different from the normally discussed situation without ionospheric scintillation, ionospheric delay cannot be neglected due to abrupt ionosphere change. In this case, ionosphere-free testing quantities for cycle slip detection and correction have to be used.     

LM-3B/E Launched Eutelsat's W3C Satellite

At 16:21 Beijing time on October 7, 2011,China successfully launched the W3C commercial telecommunications satellite manufactured by Thales Alenia Space for Eutelsat Communications into geostationary transfer orbit by using an enhanced LM-3B (LM-3B/E) launch vehicle from Xichang Satellite Launch Center.     

Technology Roadmap for Space Solar Power Proposed by Chinese Scientists

As a result of Japan raising the alert level at its quake-damaged nuclear plant from four to seven on a seven-point international scale of atomic incidents,which was caused by the 9.0-magnitude earthquake and     

基于web的日英词典自动获取技术的研究

双语词典资源对于自然语言处理研究的巨大价值已经得到越来越多的认可，尤其是在机器翻译、跨语言信息检索等方面。传统人工构建词典存在规模小、时效性差、语种不够灵活等问题，而且耗费大量的人力财力。提出了一种基于web的获取日英释义的新方法。该方法采用双向融合计算技术，首先对日语单词进行启发式搜索，在返回的网页摘要中应用基于距离和频率的方法挖掘出其候选英语单词；在第二阶段对候选英语单词进行二次搜索，并对两个阶段的结果进行融合计算来确定日英释义。     

管理学理论范式探讨——基于现代管理学派与法约尔管理理论的比较

通过对现代管理学派与法约尔的管理理论的基本观点和基本思想的比较,分析了它们在基本理论上的共通之处,指出了各现代管理学派较之法约尔管理理论的进步与局限。认为法约尔提出的基于管理五项职能即计划、组织、指挥、协调、控制的理论,已经建立起了管理学理论的基本范式。     

实时控制中的多串口通信技术

针对某计算机实时控制系统的多机间高速数据传输问题,采用多串口通信卡,通过高波特率设置以及各串口通信数据量的分配,实现了计算机间实时数据的通信,给出了其原理和编程算法。